./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 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/bin/utaipan-eEHZpOm5b7/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_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 527ba95af45b5d863cb3ca1867267fd54ac6958329e64d7162c5caa88bde96c3 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:05:10,659 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:05:10,661 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:05:10,692 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:05:10,693 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:05:10,694 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:05:10,696 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:05:10,698 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:05:10,700 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:05:10,701 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:05:10,702 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:05:10,704 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:05:10,704 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:05:10,706 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:05:10,707 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:05:10,709 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:05:10,710 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:05:10,711 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:05:10,713 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:05:10,716 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:05:10,718 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:05:10,720 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:05:10,721 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:05:10,722 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:05:10,726 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:05:10,727 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:05:10,727 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:05:10,729 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:05:10,729 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:05:10,730 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:05:10,731 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:05:10,732 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:05:10,733 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:05:10,734 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:05:10,735 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:05:10,735 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:05:10,736 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:05:10,737 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:05:10,737 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:05:10,738 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:05:10,739 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:05:10,740 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-25 20:05:10,766 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:05:10,766 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:05:10,767 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:05:10,767 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:05:10,768 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:05:10,768 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:05:10,769 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:05:10,769 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:05:10,769 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:05:10,770 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:05:10,770 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:05:10,771 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:05:10,771 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:05:10,771 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:05:10,772 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:05:10,772 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:05:10,773 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:05:10,773 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:05:10,774 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:05:10,774 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:05:10,775 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:05:10,775 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:05:10,776 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:05:10,776 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:05:10,776 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:05:10,777 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:05:10,777 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:05:10,777 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:05:10,778 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:05:10,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:05:10,779 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:05:10,779 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:05:10,779 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:05:10,779 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:05:10,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:05:10,780 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:05:10,780 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:05:10,780 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:05:10,781 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_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 527ba95af45b5d863cb3ca1867267fd54ac6958329e64d7162c5caa88bde96c3 [2021-11-25 20:05:11,047 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:05:11,073 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:05:11,076 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:05:11,077 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:05:11,078 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:05:11,079 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i [2021-11-25 20:05:11,134 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/bin/utaipan-eEHZpOm5b7/data/141de26d1/207432f510454a36b2ed6b0ce160a46c/FLAGfefceb296 [2021-11-25 20:05:12,130 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:05:12,130 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i [2021-11-25 20:05:12,199 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/bin/utaipan-eEHZpOm5b7/data/141de26d1/207432f510454a36b2ed6b0ce160a46c/FLAGfefceb296 [2021-11-25 20:05:12,457 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/bin/utaipan-eEHZpOm5b7/data/141de26d1/207432f510454a36b2ed6b0ce160a46c [2021-11-25 20:05:12,460 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:05:12,461 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:05:12,477 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:05:12,477 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:05:12,480 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:05:12,481 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:05:12" (1/1) ... [2021-11-25 20:05:12,481 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fceb37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:05:12, skipping insertion in model container [2021-11-25 20:05:12,481 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:05:12" (1/1) ... [2021-11-25 20:05:12,488 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:05:12,689 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:05:17,144 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i[470813,470826] [2021-11-25 20:05:17,147 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i[470982,470995] [2021-11-25 20:05:17,148 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i[471149,471162] [2021-11-25 20:05:17,148 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i[471317,471330] [2021-11-25 20:05:17,189 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:05:17,260 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:05:17,895 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i[470813,470826] [2021-11-25 20:05:17,896 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i[470982,470995] [2021-11-25 20:05:17,897 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i[471149,471162] [2021-11-25 20:05:17,897 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i[471317,471330] [2021-11-25 20:05:17,905 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:05:18,142 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:05:18,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:05:18 WrapperNode [2021-11-25 20:05:18,143 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:05:18,144 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:05:18,145 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:05:18,145 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:05:18,152 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:05:18" (1/1) ... [2021-11-25 20:05:18,315 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:05:18" (1/1) ... [2021-11-25 20:05:18,673 INFO L137 Inliner]: procedures = 526, calls = 4106, calls flagged for inlining = 232, calls inlined = 215, statements flattened = 8429 [2021-11-25 20:05:18,674 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:05:18,675 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:05:18,675 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:05:18,676 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:05:18,687 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:05:18" (1/1) ... [2021-11-25 20:05:18,687 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:05:18" (1/1) ... [2021-11-25 20:05:18,772 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:05:18" (1/1) ... [2021-11-25 20:05:18,775 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:05:18" (1/1) ... [2021-11-25 20:05:19,115 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:05:18" (1/1) ... [2021-11-25 20:05:19,176 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:05:18" (1/1) ... [2021-11-25 20:05:19,245 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:05:18" (1/1) ... [2021-11-25 20:05:19,383 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:05:19,384 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:05:19,385 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:05:19,385 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:05:19,396 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:05:18" (1/1) ... [2021-11-25 20:05:19,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:05:19,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:05:19,461 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:05:19,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:05:19,566 INFO L130 BoogieDeclarations]: Found specification of procedure disable_ast [2021-11-25 20:05:19,566 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_ast [2021-11-25 20:05:19,566 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-25 20:05:19,566 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-25 20:05:19,566 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-25 20:05:19,566 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-25 20:05:19,567 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-25 20:05:19,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-25 20:05:19,567 INFO L130 BoogieDeclarations]: Found specification of procedure type4_infoblock [2021-11-25 20:05:19,567 INFO L138 BoogieDeclarations]: Found implementation of procedure type4_infoblock [2021-11-25 20:05:19,567 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_put_cache [2021-11-25 20:05:19,567 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_put_cache [2021-11-25 20:05:19,567 INFO L130 BoogieDeclarations]: Found specification of procedure pci_read_config_word [2021-11-25 20:05:19,567 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_read_config_word [2021-11-25 20:05:19,568 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_lock_of_de4x5_private [2021-11-25 20:05:19,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_lock_of_de4x5_private [2021-11-25 20:05:19,568 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-25 20:05:19,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-25 20:05:19,568 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_lock_of_de4x5_private [2021-11-25 20:05:19,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_lock_of_de4x5_private [2021-11-25 20:05:19,568 INFO L130 BoogieDeclarations]: Found specification of procedure getfrom_mii [2021-11-25 20:05:19,569 INFO L138 BoogieDeclarations]: Found implementation of procedure getfrom_mii [2021-11-25 20:05:19,569 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_switch_mac_port [2021-11-25 20:05:19,569 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_switch_mac_port [2021-11-25 20:05:19,569 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2021-11-25 20:05:19,569 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2021-11-25 20:05:19,569 INFO L130 BoogieDeclarations]: Found specification of procedure srom_latch [2021-11-25 20:05:19,569 INFO L138 BoogieDeclarations]: Found implementation of procedure srom_latch [2021-11-25 20:05:19,570 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_69 [2021-11-25 20:05:19,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_69 [2021-11-25 20:05:19,570 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-25 20:05:19,570 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-25 20:05:19,570 INFO L130 BoogieDeclarations]: Found specification of procedure build_setup_frame [2021-11-25 20:05:19,570 INFO L138 BoogieDeclarations]: Found implementation of procedure build_setup_frame [2021-11-25 20:05:19,570 INFO L130 BoogieDeclarations]: Found specification of procedure type2_infoblock [2021-11-25 20:05:19,571 INFO L138 BoogieDeclarations]: Found implementation of procedure type2_infoblock [2021-11-25 20:05:19,571 INFO L130 BoogieDeclarations]: Found specification of procedure type0_infoblock [2021-11-25 20:05:19,571 INFO L138 BoogieDeclarations]: Found implementation of procedure type0_infoblock [2021-11-25 20:05:19,571 INFO L130 BoogieDeclarations]: Found specification of procedure skb_queue_empty [2021-11-25 20:05:19,571 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_queue_empty [2021-11-25 20:05:19,571 INFO L130 BoogieDeclarations]: Found specification of procedure DevicePresent [2021-11-25 20:05:19,571 INFO L138 BoogieDeclarations]: Found implementation of procedure DevicePresent [2021-11-25 20:05:19,572 INFO L130 BoogieDeclarations]: Found specification of procedure eth_mac_addr [2021-11-25 20:05:19,572 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_mac_addr [2021-11-25 20:05:19,572 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-25 20:05:19,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-25 20:05:19,572 INFO L130 BoogieDeclarations]: Found specification of procedure dc21143_infoleaf [2021-11-25 20:05:19,572 INFO L138 BoogieDeclarations]: Found implementation of procedure dc21143_infoleaf [2021-11-25 20:05:19,572 INFO L130 BoogieDeclarations]: Found specification of procedure set_multicast_list [2021-11-25 20:05:19,572 INFO L138 BoogieDeclarations]: Found implementation of procedure set_multicast_list [2021-11-25 20:05:19,573 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-25 20:05:19,573 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-25 20:05:19,573 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-25 20:05:19,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-25 20:05:19,573 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2021-11-25 20:05:19,573 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_sw_reset [2021-11-25 20:05:19,573 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_sw_reset [2021-11-25 20:05:19,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 20:05:19,574 INFO L130 BoogieDeclarations]: Found specification of procedure netif_queue_stopped [2021-11-25 20:05:19,574 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_queue_stopped [2021-11-25 20:05:19,574 INFO L130 BoogieDeclarations]: Found specification of procedure capable [2021-11-25 20:05:19,574 INFO L138 BoogieDeclarations]: Found implementation of procedure capable [2021-11-25 20:05:19,574 INFO L130 BoogieDeclarations]: Found specification of procedure eth_change_mtu [2021-11-25 20:05:19,574 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_change_mtu [2021-11-25 20:05:19,574 INFO L130 BoogieDeclarations]: Found specification of procedure is_spd_100 [2021-11-25 20:05:19,575 INFO L138 BoogieDeclarations]: Found implementation of procedure is_spd_100 [2021-11-25 20:05:19,575 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-25 20:05:19,575 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-25 20:05:19,575 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-25 20:05:19,575 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-11-25 20:05:19,575 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-11-25 20:05:19,575 INFO L130 BoogieDeclarations]: Found specification of procedure sendto_mii [2021-11-25 20:05:19,576 INFO L138 BoogieDeclarations]: Found implementation of procedure sendto_mii [2021-11-25 20:05:19,576 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_free_rx_buffs [2021-11-25 20:05:19,576 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_free_rx_buffs [2021-11-25 20:05:19,576 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-25 20:05:19,576 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-25 20:05:19,576 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-25 20:05:19,576 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-25 20:05:19,576 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~int [2021-11-25 20:05:19,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~int [2021-11-25 20:05:19,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-25 20:05:19,577 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-25 20:05:19,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-25 20:05:19,577 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 20:05:19,577 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2021-11-25 20:05:19,577 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2021-11-25 20:05:19,578 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-25 20:05:19,578 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-25 20:05:19,578 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_interrupt_context [2021-11-25 20:05:19,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_interrupt_context [2021-11-25 20:05:19,578 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2021-11-25 20:05:19,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2021-11-25 20:05:19,578 INFO L130 BoogieDeclarations]: Found specification of procedure ping_media [2021-11-25 20:05:19,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ping_media [2021-11-25 20:05:19,579 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_err_code [2021-11-25 20:05:19,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_err_code [2021-11-25 20:05:19,579 INFO L130 BoogieDeclarations]: Found specification of procedure srom_autoconf [2021-11-25 20:05:19,579 INFO L138 BoogieDeclarations]: Found implementation of procedure srom_autoconf [2021-11-25 20:05:19,579 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2021-11-25 20:05:19,579 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2021-11-25 20:05:19,579 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2021-11-25 20:05:19,580 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2021-11-25 20:05:19,580 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_tx [2021-11-25 20:05:19,580 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_tx [2021-11-25 20:05:19,580 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-25 20:05:19,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-25 20:05:19,580 INFO L130 BoogieDeclarations]: Found specification of procedure __skb_dequeue [2021-11-25 20:05:19,580 INFO L138 BoogieDeclarations]: Found implementation of procedure __skb_dequeue [2021-11-25 20:05:19,581 INFO L130 BoogieDeclarations]: Found specification of procedure srom_rd [2021-11-25 20:05:19,581 INFO L138 BoogieDeclarations]: Found implementation of procedure srom_rd [2021-11-25 20:05:19,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 20:05:19,581 INFO L130 BoogieDeclarations]: Found specification of procedure SetMulticastFilter [2021-11-25 20:05:19,581 INFO L138 BoogieDeclarations]: Found implementation of procedure SetMulticastFilter [2021-11-25 20:05:19,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:05:19,581 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_ioctl [2021-11-25 20:05:19,581 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_ioctl [2021-11-25 20:05:19,582 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-25 20:05:19,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-25 20:05:19,582 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-25 20:05:19,582 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-25 20:05:19,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 20:05:19,582 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-25 20:05:19,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-25 20:05:19,582 INFO L130 BoogieDeclarations]: Found specification of procedure getfrom_srom [2021-11-25 20:05:19,583 INFO L138 BoogieDeclarations]: Found implementation of procedure getfrom_srom [2021-11-25 20:05:19,583 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2021-11-25 20:05:19,583 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2021-11-25 20:05:19,583 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-25 20:05:19,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-25 20:05:19,583 INFO L130 BoogieDeclarations]: Found specification of procedure mii_swap [2021-11-25 20:05:19,583 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_swap [2021-11-25 20:05:19,584 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_reset_phy [2021-11-25 20:05:19,584 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_reset_phy [2021-11-25 20:05:19,584 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_putb_cache [2021-11-25 20:05:19,584 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_putb_cache [2021-11-25 20:05:19,584 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_spin_lock [2021-11-25 20:05:19,584 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_spin_lock [2021-11-25 20:05:19,584 INFO L130 BoogieDeclarations]: Found specification of procedure dc21142_infoleaf [2021-11-25 20:05:19,584 INFO L138 BoogieDeclarations]: Found implementation of procedure dc21142_infoleaf [2021-11-25 20:05:19,585 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-25 20:05:19,585 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-25 20:05:19,585 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_get_stats [2021-11-25 20:05:19,585 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_get_stats [2021-11-25 20:05:19,585 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2021-11-25 20:05:19,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2021-11-25 20:05:19,585 INFO L130 BoogieDeclarations]: Found specification of procedure dev_name [2021-11-25 20:05:19,585 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_name [2021-11-25 20:05:19,586 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_init_connection [2021-11-25 20:05:19,586 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_init_connection [2021-11-25 20:05:19,586 INFO L130 BoogieDeclarations]: Found specification of procedure mii_wr [2021-11-25 20:05:19,586 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_wr [2021-11-25 20:05:19,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:05:19,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:05:19,586 INFO L130 BoogieDeclarations]: Found specification of procedure dc21040_state [2021-11-25 20:05:19,586 INFO L138 BoogieDeclarations]: Found implementation of procedure dc21040_state [2021-11-25 20:05:19,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2021-11-25 20:05:19,587 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2021-11-25 20:05:19,587 INFO L130 BoogieDeclarations]: Found specification of procedure type3_infoblock [2021-11-25 20:05:19,587 INFO L138 BoogieDeclarations]: Found implementation of procedure type3_infoblock [2021-11-25 20:05:19,587 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-25 20:05:19,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-25 20:05:19,587 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-25 20:05:19,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-25 20:05:19,588 INFO L130 BoogieDeclarations]: Found specification of procedure reset_init_sia [2021-11-25 20:05:19,588 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_init_sia [2021-11-25 20:05:19,588 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-25 20:05:19,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-25 20:05:19,588 INFO L130 BoogieDeclarations]: Found specification of procedure request_irq [2021-11-25 20:05:19,588 INFO L138 BoogieDeclarations]: Found implementation of procedure request_irq [2021-11-25 20:05:19,588 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_alloc_rx_buff [2021-11-25 20:05:19,588 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_alloc_rx_buff [2021-11-25 20:05:19,589 INFO L130 BoogieDeclarations]: Found specification of procedure test_for_100Mb [2021-11-25 20:05:19,589 INFO L138 BoogieDeclarations]: Found implementation of procedure test_for_100Mb [2021-11-25 20:05:19,589 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_process_context [2021-11-25 20:05:19,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_process_context [2021-11-25 20:05:19,589 INFO L130 BoogieDeclarations]: Found specification of procedure type5_infoblock [2021-11-25 20:05:19,589 INFO L138 BoogieDeclarations]: Found implementation of procedure type5_infoblock [2021-11-25 20:05:19,589 INFO L130 BoogieDeclarations]: Found specification of procedure load_packet [2021-11-25 20:05:19,589 INFO L138 BoogieDeclarations]: Found implementation of procedure load_packet [2021-11-25 20:05:19,590 INFO L130 BoogieDeclarations]: Found specification of procedure dc21140m_autoconf [2021-11-25 20:05:19,590 INFO L138 BoogieDeclarations]: Found implementation of procedure dc21140m_autoconf [2021-11-25 20:05:19,590 INFO L130 BoogieDeclarations]: Found specification of procedure is_100_up [2021-11-25 20:05:19,590 INFO L138 BoogieDeclarations]: Found implementation of procedure is_100_up [2021-11-25 20:05:19,590 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_open [2021-11-25 20:05:19,590 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_open [2021-11-25 20:05:19,590 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-25 20:05:19,590 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-25 20:05:19,591 INFO L130 BoogieDeclarations]: Found specification of procedure mii_ta [2021-11-25 20:05:19,591 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_ta [2021-11-25 20:05:19,591 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-25 20:05:19,591 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-25 20:05:19,591 INFO L130 BoogieDeclarations]: Found specification of procedure dc21040_autoconf [2021-11-25 20:05:19,591 INFO L138 BoogieDeclarations]: Found implementation of procedure dc21040_autoconf [2021-11-25 20:05:19,591 INFO L130 BoogieDeclarations]: Found specification of procedure get_unaligned_le16 [2021-11-25 20:05:19,591 INFO L138 BoogieDeclarations]: Found implementation of procedure get_unaligned_le16 [2021-11-25 20:05:19,592 INFO L130 BoogieDeclarations]: Found specification of procedure test_mii_reg [2021-11-25 20:05:19,592 INFO L138 BoogieDeclarations]: Found implementation of procedure test_mii_reg [2021-11-25 20:05:19,592 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_cache_state [2021-11-25 20:05:19,592 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_cache_state [2021-11-25 20:05:19,592 INFO L130 BoogieDeclarations]: Found specification of procedure netif_start_queue [2021-11-25 20:05:19,592 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_start_queue [2021-11-25 20:05:19,592 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_pci_remove [2021-11-25 20:05:19,592 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_pci_remove [2021-11-25 20:05:19,593 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 20:05:19,593 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_dbg_media [2021-11-25 20:05:19,593 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_dbg_media [2021-11-25 20:05:19,593 INFO L130 BoogieDeclarations]: Found specification of procedure autoconf_media [2021-11-25 20:05:19,593 INFO L138 BoogieDeclarations]: Found implementation of procedure autoconf_media [2021-11-25 20:05:19,593 INFO L130 BoogieDeclarations]: Found specification of procedure dc21041_autoconf [2021-11-25 20:05:19,593 INFO L138 BoogieDeclarations]: Found implementation of procedure dc21041_autoconf [2021-11-25 20:05:19,593 INFO L130 BoogieDeclarations]: Found specification of procedure mii_rd [2021-11-25 20:05:19,594 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_rd [2021-11-25 20:05:19,594 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 20:05:19,594 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_ast [2021-11-25 20:05:19,594 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_ast [2021-11-25 20:05:19,594 INFO L130 BoogieDeclarations]: Found specification of procedure get_unaligned_le32 [2021-11-25 20:05:19,594 INFO L138 BoogieDeclarations]: Found implementation of procedure get_unaligned_le32 [2021-11-25 20:05:19,594 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~u_char~0~X~$Pointer$~TO~int [2021-11-25 20:05:19,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~u_char~0~X~$Pointer$~TO~int [2021-11-25 20:05:19,595 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 20:05:19,595 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-11-25 20:05:19,595 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-11-25 20:05:19,595 INFO L130 BoogieDeclarations]: Found specification of procedure is_10_up [2021-11-25 20:05:19,595 INFO L138 BoogieDeclarations]: Found implementation of procedure is_10_up [2021-11-25 20:05:19,595 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~structbegin~int~structend~~TO~int [2021-11-25 20:05:19,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~structbegin~int~structend~~TO~int [2021-11-25 20:05:19,596 INFO L130 BoogieDeclarations]: Found specification of procedure pci_write_config_byte [2021-11-25 20:05:19,596 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_write_config_byte [2021-11-25 20:05:19,596 INFO L130 BoogieDeclarations]: Found specification of procedure is_anc_capable [2021-11-25 20:05:19,596 INFO L138 BoogieDeclarations]: Found implementation of procedure is_anc_capable [2021-11-25 20:05:19,596 INFO L130 BoogieDeclarations]: Found specification of procedure type1_infoblock [2021-11-25 20:05:19,596 INFO L138 BoogieDeclarations]: Found implementation of procedure type1_infoblock [2021-11-25 20:05:19,596 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-25 20:05:19,596 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-25 20:05:19,597 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2021-11-25 20:05:19,597 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2021-11-25 20:05:19,597 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_request_irq [2021-11-25 20:05:19,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_request_irq [2021-11-25 20:05:19,597 INFO L130 BoogieDeclarations]: Found specification of procedure dc21140_infoleaf [2021-11-25 20:05:19,597 INFO L138 BoogieDeclarations]: Found implementation of procedure dc21140_infoleaf [2021-11-25 20:05:19,597 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-25 20:05:19,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-25 20:05:19,598 INFO L130 BoogieDeclarations]: Found specification of procedure outl [2021-11-25 20:05:19,598 INFO L138 BoogieDeclarations]: Found implementation of procedure outl [2021-11-25 20:05:19,598 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_queue_pkt [2021-11-25 20:05:19,598 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_queue_pkt [2021-11-25 20:05:19,598 INFO L130 BoogieDeclarations]: Found specification of procedure test_media [2021-11-25 20:05:19,598 INFO L138 BoogieDeclarations]: Found implementation of procedure test_media [2021-11-25 20:05:19,598 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_free_tx_buffs [2021-11-25 20:05:19,598 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_free_tx_buffs [2021-11-25 20:05:19,598 INFO L130 BoogieDeclarations]: Found specification of procedure __skb_insert [2021-11-25 20:05:19,599 INFO L138 BoogieDeclarations]: Found implementation of procedure __skb_insert [2021-11-25 20:05:19,599 INFO L130 BoogieDeclarations]: Found specification of procedure dma_free_attrs [2021-11-25 20:05:19,599 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_free_attrs [2021-11-25 20:05:19,599 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-11-25 20:05:19,599 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-11-25 20:05:19,599 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-25 20:05:19,599 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-25 20:05:19,599 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_init [2021-11-25 20:05:19,600 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_init [2021-11-25 20:05:19,600 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2021-11-25 20:05:19,600 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2021-11-25 20:05:19,600 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_73 [2021-11-25 20:05:19,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_73 [2021-11-25 20:05:19,600 INFO L130 BoogieDeclarations]: Found specification of procedure dc21041_infoleaf [2021-11-25 20:05:19,600 INFO L138 BoogieDeclarations]: Found implementation of procedure dc21041_infoleaf [2021-11-25 20:05:19,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 20:05:19,600 INFO L130 BoogieDeclarations]: Found specification of procedure srom_exec [2021-11-25 20:05:19,601 INFO L138 BoogieDeclarations]: Found implementation of procedure srom_exec [2021-11-25 20:05:19,601 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-25 20:05:19,601 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-25 20:05:19,601 INFO L130 BoogieDeclarations]: Found specification of procedure gep_wr [2021-11-25 20:05:19,601 INFO L138 BoogieDeclarations]: Found implementation of procedure gep_wr [2021-11-25 20:05:19,601 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2021-11-25 20:05:19,601 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2021-11-25 20:05:19,601 INFO L130 BoogieDeclarations]: Found specification of procedure sendto_srom [2021-11-25 20:05:19,601 INFO L138 BoogieDeclarations]: Found implementation of procedure sendto_srom [2021-11-25 20:05:19,602 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2021-11-25 20:05:19,602 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2021-11-25 20:05:19,602 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_get_cache [2021-11-25 20:05:19,602 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_get_cache [2021-11-25 20:05:19,602 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_suspect_state [2021-11-25 20:05:19,602 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_suspect_state [2021-11-25 20:05:19,602 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_dbg_mii [2021-11-25 20:05:19,602 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_dbg_mii [2021-11-25 20:05:19,603 INFO L130 BoogieDeclarations]: Found specification of procedure compact_infoblock [2021-11-25 20:05:19,603 INFO L138 BoogieDeclarations]: Found implementation of procedure compact_infoblock [2021-11-25 20:05:19,603 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-25 20:05:19,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-25 20:05:19,603 INFO L130 BoogieDeclarations]: Found specification of procedure gep_rd [2021-11-25 20:05:19,603 INFO L138 BoogieDeclarations]: Found implementation of procedure gep_rd [2021-11-25 20:05:19,603 INFO L130 BoogieDeclarations]: Found specification of procedure mii_address [2021-11-25 20:05:19,603 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_address [2021-11-25 20:05:19,604 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_free_tx_buff [2021-11-25 20:05:19,604 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_free_tx_buff [2021-11-25 20:05:19,604 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_setup_intr [2021-11-25 20:05:19,604 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_setup_intr [2021-11-25 20:05:19,604 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_save_skbs [2021-11-25 20:05:19,604 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_save_skbs [2021-11-25 20:05:19,604 INFO L130 BoogieDeclarations]: Found specification of procedure dc2114x_autoconf [2021-11-25 20:05:19,605 INFO L138 BoogieDeclarations]: Found implementation of procedure dc2114x_autoconf [2021-11-25 20:05:19,605 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2021-11-25 20:05:19,605 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2021-11-25 20:05:19,605 INFO L130 BoogieDeclarations]: Found specification of procedure srom_map_media [2021-11-25 20:05:19,605 INFO L138 BoogieDeclarations]: Found implementation of procedure srom_map_media [2021-11-25 20:05:19,605 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_strncmp [2021-11-25 20:05:19,605 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_strncmp [2021-11-25 20:05:19,605 INFO L130 BoogieDeclarations]: Found specification of procedure inl [2021-11-25 20:05:19,606 INFO L138 BoogieDeclarations]: Found implementation of procedure inl [2021-11-25 20:05:19,606 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_close [2021-11-25 20:05:19,606 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_close [2021-11-25 20:05:19,606 INFO L130 BoogieDeclarations]: Found specification of procedure yawn [2021-11-25 20:05:19,606 INFO L138 BoogieDeclarations]: Found implementation of procedure yawn [2021-11-25 20:05:19,606 INFO L130 BoogieDeclarations]: Found specification of procedure mii_wdata [2021-11-25 20:05:19,606 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_wdata [2021-11-25 20:05:19,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:05:19,607 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-25 20:05:19,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-25 20:05:19,607 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2021-11-25 20:05:20,915 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:05:20,923 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:05:21,351 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-25 20:05:35,675 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:05:38,718 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:05:38,718 INFO L301 CfgBuilder]: Removed 17 assume(true) statements. [2021-11-25 20:05:38,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:05:38 BoogieIcfgContainer [2021-11-25 20:05:38,724 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:05:38,726 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:05:38,726 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:05:38,729 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:05:38,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:05:12" (1/3) ... [2021-11-25 20:05:38,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4efade7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:05:38, skipping insertion in model container [2021-11-25 20:05:38,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:05:18" (2/3) ... [2021-11-25 20:05:38,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4efade7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:05:38, skipping insertion in model container [2021-11-25 20:05:38,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:05:38" (3/3) ... [2021-11-25 20:05:38,732 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i [2021-11-25 20:05:38,737 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:05:38,737 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-25 20:05:38,794 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:05:38,801 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 20:05:38,801 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-25 20:05:39,009 INFO L276 IsEmpty]: Start isEmpty. Operand has 2945 states, 1835 states have (on average 1.3416893732970028) internal successors, (2462), 1912 states have internal predecessors, (2462), 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) [2021-11-25 20:05:39,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-25 20:05:39,015 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:05:39,015 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:05:39,016 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)] === [2021-11-25 20:05:39,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:05:39,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1111459102, now seen corresponding path program 1 times [2021-11-25 20:05:39,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:05:39,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987419899] [2021-11-25 20:05:39,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:05:39,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:05:39,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:05:39,750 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 20:05:39,751 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:05:39,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987419899] [2021-11-25 20:05:39,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987419899] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:05:39,752 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:05:39,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:05:39,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831756372] [2021-11-25 20:05:39,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:05:39,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:05:39,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:05:39,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:05:39,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:05:39,800 INFO L87 Difference]: Start difference. First operand has 2945 states, 1835 states have (on average 1.3416893732970028) internal successors, (2462), 1912 states have internal predecessors, (2462), 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 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 20:05:41,861 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:05:48,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:05:48,058 INFO L93 Difference]: Finished difference Result 5824 states and 8875 transitions. [2021-11-25 20:05:48,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:05:48,061 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 35 [2021-11-25 20:05:48,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:05:48,128 INFO L225 Difference]: With dead ends: 5824 [2021-11-25 20:05:48,128 INFO L226 Difference]: Without dead ends: 2885 [2021-11-25 20:05:48,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:05:48,179 INFO L933 BasicCegarLoop]: 3800 mSDtfsCounter, 4277 mSDsluCounter, 8568 mSDsCounter, 0 mSdLazyCounter, 1493 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4290 SdHoareTripleChecker+Valid, 11386 SdHoareTripleChecker+Invalid, 1495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1493 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2021-11-25 20:05:48,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4290 Valid, 11386 Invalid, 1495 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 1493 Invalid, 1 Unknown, 0 Unchecked, 7.8s Time] [2021-11-25 20:05:48,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2885 states. [2021-11-25 20:05:48,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2885 to 2885. [2021-11-25 20:05:48,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2885 states, 1785 states have (on average 1.3355742296918767) internal successors, (2384), 1843 states have internal predecessors, (2384), 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) [2021-11-25 20:05:48,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2885 states to 2885 states and 4275 transitions. [2021-11-25 20:05:48,558 INFO L78 Accepts]: Start accepts. Automaton has 2885 states and 4275 transitions. Word has length 35 [2021-11-25 20:05:48,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:05:48,559 INFO L470 AbstractCegarLoop]: Abstraction has 2885 states and 4275 transitions. [2021-11-25 20:05:48,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 20:05:48,560 INFO L276 IsEmpty]: Start isEmpty. Operand 2885 states and 4275 transitions. [2021-11-25 20:05:48,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-25 20:05:48,564 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:05:48,564 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:05:48,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:05:48,565 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)] === [2021-11-25 20:05:48,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:05:48,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1127641677, now seen corresponding path program 1 times [2021-11-25 20:05:48,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:05:48,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717081008] [2021-11-25 20:05:48,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:05:48,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:05:48,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:05:48,917 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 20:05:48,917 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:05:48,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717081008] [2021-11-25 20:05:48,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717081008] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:05:48,919 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:05:48,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:05:48,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417677259] [2021-11-25 20:05:48,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:05:48,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:05:48,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:05:48,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:05:48,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:05:48,923 INFO L87 Difference]: Start difference. First operand 2885 states and 4275 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2021-11-25 20:05:50,964 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:05:57,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:05:57,227 INFO L93 Difference]: Finished difference Result 2891 states and 4280 transitions. [2021-11-25 20:05:57,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:05:57,228 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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 41 [2021-11-25 20:05:57,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:05:57,256 INFO L225 Difference]: With dead ends: 2891 [2021-11-25 20:05:57,256 INFO L226 Difference]: Without dead ends: 2889 [2021-11-25 20:05:57,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:05:57,261 INFO L933 BasicCegarLoop]: 3780 mSDtfsCounter, 4249 mSDsluCounter, 8522 mSDsCounter, 0 mSdLazyCounter, 1493 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4260 SdHoareTripleChecker+Valid, 11320 SdHoareTripleChecker+Invalid, 1495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1493 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:05:57,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4260 Valid, 11320 Invalid, 1495 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 1493 Invalid, 1 Unknown, 0 Unchecked, 8.0s Time] [2021-11-25 20:05:57,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2889 states. [2021-11-25 20:05:57,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2889 to 2889. [2021-11-25 20:05:57,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2889 states, 1788 states have (on average 1.3350111856823266) internal successors, (2387), 1846 states have internal predecessors, (2387), 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) [2021-11-25 20:05:57,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2889 states to 2889 states and 4278 transitions. [2021-11-25 20:05:57,498 INFO L78 Accepts]: Start accepts. Automaton has 2889 states and 4278 transitions. Word has length 41 [2021-11-25 20:05:57,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:05:57,499 INFO L470 AbstractCegarLoop]: Abstraction has 2889 states and 4278 transitions. [2021-11-25 20:05:57,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2021-11-25 20:05:57,499 INFO L276 IsEmpty]: Start isEmpty. Operand 2889 states and 4278 transitions. [2021-11-25 20:05:57,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-25 20:05:57,505 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:05:57,506 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] [2021-11-25 20:05:57,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 20:05:57,506 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)] === [2021-11-25 20:05:57,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:05:57,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1583761186, now seen corresponding path program 1 times [2021-11-25 20:05:57,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:05:57,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698002520] [2021-11-25 20:05:57,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:05:57,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:05:57,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:05:57,808 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 20:05:57,809 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:05:57,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698002520] [2021-11-25 20:05:57,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698002520] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:05:57,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:05:57,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:05:57,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408066505] [2021-11-25 20:05:57,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:05:57,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:05:57,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:05:57,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:05:57,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:05:57,814 INFO L87 Difference]: Start difference. First operand 2889 states and 4278 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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) [2021-11-25 20:05:59,853 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:06:05,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:06:05,607 INFO L93 Difference]: Finished difference Result 2895 states and 4283 transitions. [2021-11-25 20:06:05,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:06:05,608 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 45 [2021-11-25 20:06:05,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:06:05,638 INFO L225 Difference]: With dead ends: 2895 [2021-11-25 20:06:05,638 INFO L226 Difference]: Without dead ends: 2893 [2021-11-25 20:06:05,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:06:05,642 INFO L933 BasicCegarLoop]: 3780 mSDtfsCounter, 4250 mSDsluCounter, 8522 mSDsCounter, 0 mSdLazyCounter, 1493 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4260 SdHoareTripleChecker+Valid, 11320 SdHoareTripleChecker+Invalid, 1495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1493 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:06:05,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4260 Valid, 11320 Invalid, 1495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1493 Invalid, 1 Unknown, 0 Unchecked, 7.5s Time] [2021-11-25 20:06:05,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2893 states. [2021-11-25 20:06:05,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2893 to 2893. [2021-11-25 20:06:05,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2893 states, 1791 states have (on average 1.3344500279173646) internal successors, (2390), 1849 states have internal predecessors, (2390), 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) [2021-11-25 20:06:05,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2893 states to 2893 states and 4281 transitions. [2021-11-25 20:06:05,879 INFO L78 Accepts]: Start accepts. Automaton has 2893 states and 4281 transitions. Word has length 45 [2021-11-25 20:06:05,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:06:05,884 INFO L470 AbstractCegarLoop]: Abstraction has 2893 states and 4281 transitions. [2021-11-25 20:06:05,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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) [2021-11-25 20:06:05,884 INFO L276 IsEmpty]: Start isEmpty. Operand 2893 states and 4281 transitions. [2021-11-25 20:06:05,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-25 20:06:05,889 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:06:05,889 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:06:05,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 20:06:05,890 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)] === [2021-11-25 20:06:05,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:06:05,890 INFO L85 PathProgramCache]: Analyzing trace with hash 688828278, now seen corresponding path program 1 times [2021-11-25 20:06:05,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:06:05,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866892855] [2021-11-25 20:06:05,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:06:05,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:06:06,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:06:06,166 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-25 20:06:06,166 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:06:06,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866892855] [2021-11-25 20:06:06,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866892855] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:06:06,167 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:06:06,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:06:06,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616993134] [2021-11-25 20:06:06,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:06:06,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:06:06,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:06:06,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:06:06,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:06:06,171 INFO L87 Difference]: Start difference. First operand 2893 states and 4281 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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) [2021-11-25 20:06:08,212 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:06:13,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:06:13,385 INFO L93 Difference]: Finished difference Result 2899 states and 4286 transitions. [2021-11-25 20:06:13,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:06:13,386 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 50 [2021-11-25 20:06:13,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:06:13,425 INFO L225 Difference]: With dead ends: 2899 [2021-11-25 20:06:13,425 INFO L226 Difference]: Without dead ends: 2897 [2021-11-25 20:06:13,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:06:13,433 INFO L933 BasicCegarLoop]: 3780 mSDtfsCounter, 4250 mSDsluCounter, 8522 mSDsCounter, 0 mSdLazyCounter, 1493 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4259 SdHoareTripleChecker+Valid, 11320 SdHoareTripleChecker+Invalid, 1495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1493 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:06:13,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4259 Valid, 11320 Invalid, 1495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1493 Invalid, 1 Unknown, 0 Unchecked, 7.0s Time] [2021-11-25 20:06:13,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2897 states. [2021-11-25 20:06:13,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2897 to 2897. [2021-11-25 20:06:13,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2897 states, 1794 states have (on average 1.3338907469342252) internal successors, (2393), 1852 states have internal predecessors, (2393), 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) [2021-11-25 20:06:13,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2897 states to 2897 states and 4284 transitions. [2021-11-25 20:06:13,688 INFO L78 Accepts]: Start accepts. Automaton has 2897 states and 4284 transitions. Word has length 50 [2021-11-25 20:06:13,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:06:13,688 INFO L470 AbstractCegarLoop]: Abstraction has 2897 states and 4284 transitions. [2021-11-25 20:06:13,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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) [2021-11-25 20:06:13,690 INFO L276 IsEmpty]: Start isEmpty. Operand 2897 states and 4284 transitions. [2021-11-25 20:06:13,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-25 20:06:13,692 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:06:13,692 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:06:13,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 20:06:13,693 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)] === [2021-11-25 20:06:13,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:06:13,693 INFO L85 PathProgramCache]: Analyzing trace with hash 155238469, now seen corresponding path program 1 times [2021-11-25 20:06:13,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:06:13,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195193659] [2021-11-25 20:06:13,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:06:13,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:06:13,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:06:13,934 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-25 20:06:13,935 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:06:13,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195193659] [2021-11-25 20:06:13,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195193659] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:06:13,936 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:06:13,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:06:13,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69581778] [2021-11-25 20:06:13,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:06:13,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:06:13,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:06:13,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:06:13,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:06:13,938 INFO L87 Difference]: Start difference. First operand 2897 states and 4284 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2021-11-25 20:06:15,977 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:06:21,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:06:21,155 INFO L93 Difference]: Finished difference Result 2903 states and 4289 transitions. [2021-11-25 20:06:21,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:06:21,156 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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 56 [2021-11-25 20:06:21,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:06:21,181 INFO L225 Difference]: With dead ends: 2903 [2021-11-25 20:06:21,181 INFO L226 Difference]: Without dead ends: 2901 [2021-11-25 20:06:21,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:06:21,184 INFO L933 BasicCegarLoop]: 3780 mSDtfsCounter, 4249 mSDsluCounter, 8522 mSDsCounter, 0 mSdLazyCounter, 1493 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4257 SdHoareTripleChecker+Valid, 11320 SdHoareTripleChecker+Invalid, 1495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1493 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:06:21,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4257 Valid, 11320 Invalid, 1495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1493 Invalid, 1 Unknown, 0 Unchecked, 7.0s Time] [2021-11-25 20:06:21,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2901 states. [2021-11-25 20:06:21,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2901 to 2901. [2021-11-25 20:06:21,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2901 states, 1797 states have (on average 1.3333333333333333) internal successors, (2396), 1855 states have internal predecessors, (2396), 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) [2021-11-25 20:06:21,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2901 states to 2901 states and 4287 transitions. [2021-11-25 20:06:21,541 INFO L78 Accepts]: Start accepts. Automaton has 2901 states and 4287 transitions. Word has length 56 [2021-11-25 20:06:21,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:06:21,542 INFO L470 AbstractCegarLoop]: Abstraction has 2901 states and 4287 transitions. [2021-11-25 20:06:21,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2021-11-25 20:06:21,542 INFO L276 IsEmpty]: Start isEmpty. Operand 2901 states and 4287 transitions. [2021-11-25 20:06:21,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-25 20:06:21,544 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:06:21,545 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:06:21,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 20:06:21,545 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)] === [2021-11-25 20:06:21,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:06:21,546 INFO L85 PathProgramCache]: Analyzing trace with hash -322198605, now seen corresponding path program 1 times [2021-11-25 20:06:21,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:06:21,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952719384] [2021-11-25 20:06:21,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:06:21,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:06:21,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:06:21,742 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-25 20:06:21,743 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:06:21,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952719384] [2021-11-25 20:06:21,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952719384] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:06:21,743 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:06:21,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:06:21,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398054228] [2021-11-25 20:06:21,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:06:21,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:06:21,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:06:21,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:06:21,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:06:21,746 INFO L87 Difference]: Start difference. First operand 2901 states and 4287 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2021-11-25 20:06:23,787 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:06:28,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:06:28,259 INFO L93 Difference]: Finished difference Result 2907 states and 4292 transitions. [2021-11-25 20:06:28,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:06:28,260 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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 61 [2021-11-25 20:06:28,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:06:28,288 INFO L225 Difference]: With dead ends: 2907 [2021-11-25 20:06:28,288 INFO L226 Difference]: Without dead ends: 2905 [2021-11-25 20:06:28,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:06:28,292 INFO L933 BasicCegarLoop]: 3780 mSDtfsCounter, 4249 mSDsluCounter, 8522 mSDsCounter, 0 mSdLazyCounter, 1493 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4256 SdHoareTripleChecker+Valid, 11320 SdHoareTripleChecker+Invalid, 1495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1493 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:06:28,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4256 Valid, 11320 Invalid, 1495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1493 Invalid, 1 Unknown, 0 Unchecked, 6.4s Time] [2021-11-25 20:06:28,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2905 states. [2021-11-25 20:06:28,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2905 to 2905. [2021-11-25 20:06:28,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2905 states, 1800 states have (on average 1.3327777777777778) internal successors, (2399), 1858 states have internal predecessors, (2399), 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) [2021-11-25 20:06:28,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2905 states to 2905 states and 4290 transitions. [2021-11-25 20:06:28,484 INFO L78 Accepts]: Start accepts. Automaton has 2905 states and 4290 transitions. Word has length 61 [2021-11-25 20:06:28,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:06:28,485 INFO L470 AbstractCegarLoop]: Abstraction has 2905 states and 4290 transitions. [2021-11-25 20:06:28,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2021-11-25 20:06:28,485 INFO L276 IsEmpty]: Start isEmpty. Operand 2905 states and 4290 transitions. [2021-11-25 20:06:28,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-25 20:06:28,486 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:06:28,486 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:06:28,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 20:06:28,487 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)] === [2021-11-25 20:06:28,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:06:28,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1687683166, now seen corresponding path program 1 times [2021-11-25 20:06:28,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:06:28,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997809950] [2021-11-25 20:06:28,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:06:28,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:06:28,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:06:28,739 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-25 20:06:28,740 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:06:28,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997809950] [2021-11-25 20:06:28,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997809950] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:06:28,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:06:28,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:06:28,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931676922] [2021-11-25 20:06:28,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:06:28,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:06:28,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:06:28,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:06:28,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:06:28,742 INFO L87 Difference]: Start difference. First operand 2905 states and 4290 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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) [2021-11-25 20:06:30,780 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:06:35,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:06:35,413 INFO L93 Difference]: Finished difference Result 2911 states and 4295 transitions. [2021-11-25 20:06:35,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:06:35,414 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 65 [2021-11-25 20:06:35,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:06:35,434 INFO L225 Difference]: With dead ends: 2911 [2021-11-25 20:06:35,434 INFO L226 Difference]: Without dead ends: 2909 [2021-11-25 20:06:35,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:06:35,437 INFO L933 BasicCegarLoop]: 3780 mSDtfsCounter, 4250 mSDsluCounter, 8522 mSDsCounter, 0 mSdLazyCounter, 1493 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4256 SdHoareTripleChecker+Valid, 11320 SdHoareTripleChecker+Invalid, 1495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1493 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:06:35,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4256 Valid, 11320 Invalid, 1495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1493 Invalid, 1 Unknown, 0 Unchecked, 6.5s Time] [2021-11-25 20:06:35,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2909 states. [2021-11-25 20:06:35,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2909 to 2909. [2021-11-25 20:06:35,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2909 states, 1803 states have (on average 1.3322240709927897) internal successors, (2402), 1861 states have internal predecessors, (2402), 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) [2021-11-25 20:06:35,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2909 states to 2909 states and 4293 transitions. [2021-11-25 20:06:35,632 INFO L78 Accepts]: Start accepts. Automaton has 2909 states and 4293 transitions. Word has length 65 [2021-11-25 20:06:35,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:06:35,632 INFO L470 AbstractCegarLoop]: Abstraction has 2909 states and 4293 transitions. [2021-11-25 20:06:35,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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) [2021-11-25 20:06:35,633 INFO L276 IsEmpty]: Start isEmpty. Operand 2909 states and 4293 transitions. [2021-11-25 20:06:35,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-25 20:06:35,634 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:06:35,634 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:06:35,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 20:06:35,635 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)] === [2021-11-25 20:06:35,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:06:35,636 INFO L85 PathProgramCache]: Analyzing trace with hash 477206195, now seen corresponding path program 1 times [2021-11-25 20:06:35,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:06:35,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364810914] [2021-11-25 20:06:35,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:06:35,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:06:35,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:06:35,856 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-25 20:06:35,856 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:06:35,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364810914] [2021-11-25 20:06:35,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364810914] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:06:35,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:06:35,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:06:35,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949568352] [2021-11-25 20:06:35,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:06:35,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:06:35,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:06:35,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:06:35,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:06:35,858 INFO L87 Difference]: Start difference. First operand 2909 states and 4293 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2021-11-25 20:06:37,896 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:06:40,590 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:06:42,591 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:06:49,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:06:49,799 INFO L93 Difference]: Finished difference Result 3125 states and 4555 transitions. [2021-11-25 20:06:49,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:06:49,800 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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 71 [2021-11-25 20:06:49,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:06:49,822 INFO L225 Difference]: With dead ends: 3125 [2021-11-25 20:06:49,822 INFO L226 Difference]: Without dead ends: 3123 [2021-11-25 20:06:49,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:06:49,824 INFO L933 BasicCegarLoop]: 3880 mSDtfsCounter, 4031 mSDsluCounter, 9201 mSDsCounter, 0 mSdLazyCounter, 1569 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4036 SdHoareTripleChecker+Valid, 12027 SdHoareTripleChecker+Invalid, 1573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1569 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.7s IncrementalHoareTripleChecker+Time [2021-11-25 20:06:49,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4036 Valid, 12027 Invalid, 1573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1569 Invalid, 2 Unknown, 0 Unchecked, 13.7s Time] [2021-11-25 20:06:49,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3123 states. [2021-11-25 20:06:50,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3123 to 3117. [2021-11-25 20:06:50,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3117 states, 1922 states have (on average 1.3241415192507804) internal successors, (2545), 1987 states have internal predecessors, (2545), 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) [2021-11-25 20:06:50,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3117 states to 3117 states and 4549 transitions. [2021-11-25 20:06:50,067 INFO L78 Accepts]: Start accepts. Automaton has 3117 states and 4549 transitions. Word has length 71 [2021-11-25 20:06:50,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:06:50,068 INFO L470 AbstractCegarLoop]: Abstraction has 3117 states and 4549 transitions. [2021-11-25 20:06:50,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2021-11-25 20:06:50,068 INFO L276 IsEmpty]: Start isEmpty. Operand 3117 states and 4549 transitions. [2021-11-25 20:06:50,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-25 20:06:50,070 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:06:50,070 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:06:50,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 20:06:50,070 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)] === [2021-11-25 20:06:50,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:06:50,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1086122309, now seen corresponding path program 1 times [2021-11-25 20:06:50,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:06:50,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047781897] [2021-11-25 20:06:50,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:06:50,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:06:50,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:06:50,257 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2021-11-25 20:06:50,257 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:06:50,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047781897] [2021-11-25 20:06:50,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047781897] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:06:50,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:06:50,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:06:50,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032858538] [2021-11-25 20:06:50,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:06:50,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:06:50,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:06:50,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:06:50,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:06:50,261 INFO L87 Difference]: Start difference. First operand 3117 states and 4549 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2021-11-25 20:06:52,300 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:06:59,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:06:59,093 INFO L93 Difference]: Finished difference Result 3123 states and 4554 transitions. [2021-11-25 20:06:59,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:06:59,094 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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 76 [2021-11-25 20:06:59,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:06:59,141 INFO L225 Difference]: With dead ends: 3123 [2021-11-25 20:06:59,142 INFO L226 Difference]: Without dead ends: 3121 [2021-11-25 20:06:59,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:06:59,146 INFO L933 BasicCegarLoop]: 3780 mSDtfsCounter, 4249 mSDsluCounter, 8522 mSDsCounter, 0 mSdLazyCounter, 1493 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4253 SdHoareTripleChecker+Valid, 11320 SdHoareTripleChecker+Invalid, 1495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1493 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:06:59,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4253 Valid, 11320 Invalid, 1495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1493 Invalid, 1 Unknown, 0 Unchecked, 8.6s Time] [2021-11-25 20:06:59,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3121 states. [2021-11-25 20:06:59,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3121 to 3121. [2021-11-25 20:06:59,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3121 states, 1925 states have (on average 1.3236363636363637) internal successors, (2548), 1990 states have internal predecessors, (2548), 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) [2021-11-25 20:06:59,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3121 states to 3121 states and 4552 transitions. [2021-11-25 20:06:59,379 INFO L78 Accepts]: Start accepts. Automaton has 3121 states and 4552 transitions. Word has length 76 [2021-11-25 20:06:59,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:06:59,380 INFO L470 AbstractCegarLoop]: Abstraction has 3121 states and 4552 transitions. [2021-11-25 20:06:59,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2021-11-25 20:06:59,381 INFO L276 IsEmpty]: Start isEmpty. Operand 3121 states and 4552 transitions. [2021-11-25 20:06:59,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-25 20:06:59,387 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:06:59,387 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:06:59,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 20:06:59,387 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)] === [2021-11-25 20:06:59,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:06:59,388 INFO L85 PathProgramCache]: Analyzing trace with hash 5804342, now seen corresponding path program 1 times [2021-11-25 20:06:59,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:06:59,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906140229] [2021-11-25 20:06:59,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:06:59,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:06:59,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:06:59,715 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-11-25 20:06:59,715 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:06:59,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906140229] [2021-11-25 20:06:59,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906140229] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:06:59,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:06:59,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:06:59,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985646340] [2021-11-25 20:06:59,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:06:59,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:06:59,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:06:59,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:06:59,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:06:59,717 INFO L87 Difference]: Start difference. First operand 3121 states and 4552 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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) [2021-11-25 20:07:01,755 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:07:07,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:07:07,522 INFO L93 Difference]: Finished difference Result 3127 states and 4557 transitions. [2021-11-25 20:07:07,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:07:07,523 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 80 [2021-11-25 20:07:07,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:07:07,539 INFO L225 Difference]: With dead ends: 3127 [2021-11-25 20:07:07,539 INFO L226 Difference]: Without dead ends: 3125 [2021-11-25 20:07:07,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:07:07,542 INFO L933 BasicCegarLoop]: 3780 mSDtfsCounter, 4250 mSDsluCounter, 8522 mSDsCounter, 0 mSdLazyCounter, 1493 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4253 SdHoareTripleChecker+Valid, 11320 SdHoareTripleChecker+Invalid, 1495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1493 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:07:07,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4253 Valid, 11320 Invalid, 1495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1493 Invalid, 1 Unknown, 0 Unchecked, 7.6s Time] [2021-11-25 20:07:07,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3125 states. [2021-11-25 20:07:07,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3125 to 3125. [2021-11-25 20:07:07,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3125 states, 1928 states have (on average 1.3231327800829875) internal successors, (2551), 1993 states have internal predecessors, (2551), 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) [2021-11-25 20:07:07,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3125 states to 3125 states and 4555 transitions. [2021-11-25 20:07:07,768 INFO L78 Accepts]: Start accepts. Automaton has 3125 states and 4555 transitions. Word has length 80 [2021-11-25 20:07:07,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:07:07,769 INFO L470 AbstractCegarLoop]: Abstraction has 3125 states and 4555 transitions. [2021-11-25 20:07:07,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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) [2021-11-25 20:07:07,769 INFO L276 IsEmpty]: Start isEmpty. Operand 3125 states and 4555 transitions. [2021-11-25 20:07:07,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-25 20:07:07,774 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:07:07,774 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:07:07,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 20:07:07,775 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)] === [2021-11-25 20:07:07,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:07:07,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1184295483, now seen corresponding path program 1 times [2021-11-25 20:07:07,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:07:07,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801986781] [2021-11-25 20:07:07,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:07:07,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:07:07,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:07:07,973 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2021-11-25 20:07:07,973 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:07:07,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801986781] [2021-11-25 20:07:07,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801986781] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:07:07,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:07:07,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:07:07,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148985601] [2021-11-25 20:07:07,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:07:07,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:07:07,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:07:07,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:07:07,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:07:07,976 INFO L87 Difference]: Start difference. First operand 3125 states and 4555 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2021-11-25 20:07:10,015 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:07:16,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:07:16,364 INFO L93 Difference]: Finished difference Result 3131 states and 4560 transitions. [2021-11-25 20:07:16,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:07:16,365 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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 86 [2021-11-25 20:07:16,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:07:16,379 INFO L225 Difference]: With dead ends: 3131 [2021-11-25 20:07:16,379 INFO L226 Difference]: Without dead ends: 3129 [2021-11-25 20:07:16,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:07:16,383 INFO L933 BasicCegarLoop]: 3780 mSDtfsCounter, 4249 mSDsluCounter, 8522 mSDsCounter, 0 mSdLazyCounter, 1493 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4251 SdHoareTripleChecker+Valid, 11320 SdHoareTripleChecker+Invalid, 1495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1493 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:07:16,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4251 Valid, 11320 Invalid, 1495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1493 Invalid, 1 Unknown, 0 Unchecked, 8.2s Time] [2021-11-25 20:07:16,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3129 states. [2021-11-25 20:07:16,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3129 to 3129. [2021-11-25 20:07:16,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3129 states, 1931 states have (on average 1.322630761263594) internal successors, (2554), 1996 states have internal predecessors, (2554), 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) [2021-11-25 20:07:16,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3129 states to 3129 states and 4558 transitions. [2021-11-25 20:07:16,614 INFO L78 Accepts]: Start accepts. Automaton has 3129 states and 4558 transitions. Word has length 86 [2021-11-25 20:07:16,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:07:16,615 INFO L470 AbstractCegarLoop]: Abstraction has 3129 states and 4558 transitions. [2021-11-25 20:07:16,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2021-11-25 20:07:16,615 INFO L276 IsEmpty]: Start isEmpty. Operand 3129 states and 4558 transitions. [2021-11-25 20:07:16,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-25 20:07:16,617 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:07:16,617 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:07:16,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 20:07:16,617 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)] === [2021-11-25 20:07:16,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:07:16,618 INFO L85 PathProgramCache]: Analyzing trace with hash -55882573, now seen corresponding path program 1 times [2021-11-25 20:07:16,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:07:16,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191828596] [2021-11-25 20:07:16,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:07:16,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:07:16,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:07:16,805 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-25 20:07:16,805 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:07:16,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191828596] [2021-11-25 20:07:16,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191828596] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:07:16,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:07:16,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:07:16,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816589641] [2021-11-25 20:07:16,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:07:16,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:07:16,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:07:16,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:07:16,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:07:16,808 INFO L87 Difference]: Start difference. First operand 3129 states and 4558 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2021-11-25 20:07:18,846 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:07:25,799 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:07:26,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:07:26,216 INFO L93 Difference]: Finished difference Result 3135 states and 4563 transitions. [2021-11-25 20:07:26,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:07:26,217 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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 91 [2021-11-25 20:07:26,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:07:26,232 INFO L225 Difference]: With dead ends: 3135 [2021-11-25 20:07:26,233 INFO L226 Difference]: Without dead ends: 3131 [2021-11-25 20:07:26,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:07:26,235 INFO L933 BasicCegarLoop]: 3780 mSDtfsCounter, 4249 mSDsluCounter, 8522 mSDsCounter, 0 mSdLazyCounter, 1493 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4250 SdHoareTripleChecker+Valid, 11320 SdHoareTripleChecker+Invalid, 1495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1493 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:07:26,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4250 Valid, 11320 Invalid, 1495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1493 Invalid, 1 Unknown, 0 Unchecked, 9.2s Time] [2021-11-25 20:07:26,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3131 states. [2021-11-25 20:07:26,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3131 to 3131. [2021-11-25 20:07:26,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3131 states, 1933 states have (on average 1.321779617175375) internal successors, (2555), 1997 states have internal predecessors, (2555), 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) [2021-11-25 20:07:26,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3131 states to 3131 states and 4559 transitions. [2021-11-25 20:07:26,477 INFO L78 Accepts]: Start accepts. Automaton has 3131 states and 4559 transitions. Word has length 91 [2021-11-25 20:07:26,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:07:26,479 INFO L470 AbstractCegarLoop]: Abstraction has 3131 states and 4559 transitions. [2021-11-25 20:07:26,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2021-11-25 20:07:26,480 INFO L276 IsEmpty]: Start isEmpty. Operand 3131 states and 4559 transitions. [2021-11-25 20:07:26,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-25 20:07:26,481 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:07:26,482 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:07:26,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-25 20:07:26,482 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)] === [2021-11-25 20:07:26,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:07:26,483 INFO L85 PathProgramCache]: Analyzing trace with hash 781800005, now seen corresponding path program 1 times [2021-11-25 20:07:26,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:07:26,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197779293] [2021-11-25 20:07:26,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:07:26,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:07:26,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:07:26,728 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-11-25 20:07:26,729 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:07:26,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197779293] [2021-11-25 20:07:26,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197779293] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:07:26,729 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:07:26,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:07:26,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864677564] [2021-11-25 20:07:26,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:07:26,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:07:26,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:07:26,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:07:26,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:07:26,731 INFO L87 Difference]: Start difference. First operand 3131 states and 4559 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2021-11-25 20:07:28,773 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:07:34,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:07:34,787 INFO L93 Difference]: Finished difference Result 3131 states and 4559 transitions. [2021-11-25 20:07:34,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:07:34,788 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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 96 [2021-11-25 20:07:34,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:07:34,800 INFO L225 Difference]: With dead ends: 3131 [2021-11-25 20:07:34,801 INFO L226 Difference]: Without dead ends: 3049 [2021-11-25 20:07:34,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:07:34,804 INFO L933 BasicCegarLoop]: 3778 mSDtfsCounter, 4245 mSDsluCounter, 8521 mSDsCounter, 0 mSdLazyCounter, 1488 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4245 SdHoareTripleChecker+Valid, 11317 SdHoareTripleChecker+Invalid, 1490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1488 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2021-11-25 20:07:34,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4245 Valid, 11317 Invalid, 1490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1488 Invalid, 1 Unknown, 0 Unchecked, 7.9s Time] [2021-11-25 20:07:34,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3049 states. [2021-11-25 20:07:35,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3049 to 3049. [2021-11-25 20:07:35,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3049 states, 1886 states have (on average 1.3282078472958643) internal successors, (2505), 1948 states have internal predecessors, (2505), 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) [2021-11-25 20:07:35,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3049 states to 3049 states and 4468 transitions. [2021-11-25 20:07:35,176 INFO L78 Accepts]: Start accepts. Automaton has 3049 states and 4468 transitions. Word has length 96 [2021-11-25 20:07:35,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:07:35,176 INFO L470 AbstractCegarLoop]: Abstraction has 3049 states and 4468 transitions. [2021-11-25 20:07:35,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2021-11-25 20:07:35,176 INFO L276 IsEmpty]: Start isEmpty. Operand 3049 states and 4468 transitions. [2021-11-25 20:07:35,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-25 20:07:35,185 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:07:35,185 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 4, 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] [2021-11-25 20:07:35,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-25 20:07:35,185 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)] === [2021-11-25 20:07:35,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:07:35,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1117993039, now seen corresponding path program 1 times [2021-11-25 20:07:35,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:07:35,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135028303] [2021-11-25 20:07:35,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:07:35,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:07:35,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:07:35,412 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-25 20:07:35,412 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:07:35,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135028303] [2021-11-25 20:07:35,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135028303] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:07:35,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:07:35,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:07:35,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211611423] [2021-11-25 20:07:35,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:07:35,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:07:35,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:07:35,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:07:35,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:07:35,415 INFO L87 Difference]: Start difference. First operand 3049 states and 4468 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-25 20:07:37,457 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:07:40,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:07:40,183 INFO L93 Difference]: Finished difference Result 6083 states and 8913 transitions. [2021-11-25 20:07:40,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:07:40,184 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 143 [2021-11-25 20:07:40,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:07:40,200 INFO L225 Difference]: With dead ends: 6083 [2021-11-25 20:07:40,200 INFO L226 Difference]: Without dead ends: 3048 [2021-11-25 20:07:40,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:07:40,224 INFO L933 BasicCegarLoop]: 3723 mSDtfsCounter, 4196 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4196 SdHoareTripleChecker+Valid, 3723 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:07:40,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4196 Valid, 3723 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 488 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2021-11-25 20:07:40,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3048 states. [2021-11-25 20:07:40,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3048 to 3048. [2021-11-25 20:07:40,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3048 states, 1885 states have (on average 1.3273209549071618) internal successors, (2502), 1947 states have internal predecessors, (2502), 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) [2021-11-25 20:07:40,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3048 states to 3048 states and 4465 transitions. [2021-11-25 20:07:40,466 INFO L78 Accepts]: Start accepts. Automaton has 3048 states and 4465 transitions. Word has length 143 [2021-11-25 20:07:40,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:07:40,467 INFO L470 AbstractCegarLoop]: Abstraction has 3048 states and 4465 transitions. [2021-11-25 20:07:40,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-25 20:07:40,467 INFO L276 IsEmpty]: Start isEmpty. Operand 3048 states and 4465 transitions. [2021-11-25 20:07:40,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-25 20:07:40,476 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:07:40,477 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 4, 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] [2021-11-25 20:07:40,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-25 20:07:40,477 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)] === [2021-11-25 20:07:40,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:07:40,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1052799301, now seen corresponding path program 1 times [2021-11-25 20:07:40,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:07:40,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417586185] [2021-11-25 20:07:40,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:07:40,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:07:40,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:07:40,821 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-25 20:07:40,822 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:07:40,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417586185] [2021-11-25 20:07:40,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417586185] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:07:40,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:07:40,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:07:40,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288041233] [2021-11-25 20:07:40,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:07:40,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:07:40,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:07:40,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:07:40,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:07:40,825 INFO L87 Difference]: Start difference. First operand 3048 states and 4465 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-25 20:07:42,868 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:07:51,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:07:51,064 INFO L93 Difference]: Finished difference Result 3054 states and 4469 transitions. [2021-11-25 20:07:51,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:07:51,065 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 144 [2021-11-25 20:07:51,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:07:51,081 INFO L225 Difference]: With dead ends: 3054 [2021-11-25 20:07:51,082 INFO L226 Difference]: Without dead ends: 3052 [2021-11-25 20:07:51,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:07:51,085 INFO L933 BasicCegarLoop]: 3821 mSDtfsCounter, 3933 mSDsluCounter, 9093 mSDsCounter, 0 mSdLazyCounter, 1547 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3934 SdHoareTripleChecker+Valid, 11868 SdHoareTripleChecker+Invalid, 1550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1547 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:07:51,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3934 Valid, 11868 Invalid, 1550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1547 Invalid, 1 Unknown, 0 Unchecked, 10.0s Time] [2021-11-25 20:07:51,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3052 states. [2021-11-25 20:07:51,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3052 to 3048. [2021-11-25 20:07:51,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3048 states, 1885 states have (on average 1.3267904509283819) internal successors, (2501), 1947 states have internal predecessors, (2501), 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) [2021-11-25 20:07:51,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3048 states to 3048 states and 4464 transitions. [2021-11-25 20:07:51,334 INFO L78 Accepts]: Start accepts. Automaton has 3048 states and 4464 transitions. Word has length 144 [2021-11-25 20:07:51,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:07:51,335 INFO L470 AbstractCegarLoop]: Abstraction has 3048 states and 4464 transitions. [2021-11-25 20:07:51,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-25 20:07:51,335 INFO L276 IsEmpty]: Start isEmpty. Operand 3048 states and 4464 transitions. [2021-11-25 20:07:51,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-11-25 20:07:51,357 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:07:51,357 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 7, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:07:51,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-25 20:07:51,358 INFO L402 AbstractCegarLoop]: === Iteration 16 === 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)] === [2021-11-25 20:07:51,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:07:51,359 INFO L85 PathProgramCache]: Analyzing trace with hash -549499399, now seen corresponding path program 1 times [2021-11-25 20:07:51,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:07:51,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910908822] [2021-11-25 20:07:51,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:07:51,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:07:51,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:07:51,670 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-11-25 20:07:51,671 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:07:51,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910908822] [2021-11-25 20:07:51,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910908822] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:07:51,673 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:07:51,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:07:51,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767245801] [2021-11-25 20:07:51,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:07:51,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:07:51,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:07:51,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:07:51,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:07:51,675 INFO L87 Difference]: Start difference. First operand 3048 states and 4464 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-25 20:07:53,717 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:08:02,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:08:02,817 INFO L93 Difference]: Finished difference Result 3052 states and 4467 transitions. [2021-11-25 20:08:02,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:08:02,818 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 206 [2021-11-25 20:08:02,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:08:02,833 INFO L225 Difference]: With dead ends: 3052 [2021-11-25 20:08:02,833 INFO L226 Difference]: Without dead ends: 3050 [2021-11-25 20:08:02,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:08:02,836 INFO L933 BasicCegarLoop]: 3891 mSDtfsCounter, 462 mSDsluCounter, 12819 mSDsCounter, 0 mSdLazyCounter, 2042 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 15202 SdHoareTripleChecker+Invalid, 2044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2042 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2021-11-25 20:08:02,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [463 Valid, 15202 Invalid, 2044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2042 Invalid, 1 Unknown, 0 Unchecked, 10.9s Time] [2021-11-25 20:08:02,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3050 states. [2021-11-25 20:08:03,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3050 to 3048. [2021-11-25 20:08:03,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3048 states, 1885 states have (on average 1.3262599469496021) internal successors, (2500), 1947 states have internal predecessors, (2500), 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) [2021-11-25 20:08:03,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3048 states to 3048 states and 4463 transitions. [2021-11-25 20:08:03,079 INFO L78 Accepts]: Start accepts. Automaton has 3048 states and 4463 transitions. Word has length 206 [2021-11-25 20:08:03,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:08:03,080 INFO L470 AbstractCegarLoop]: Abstraction has 3048 states and 4463 transitions. [2021-11-25 20:08:03,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-25 20:08:03,080 INFO L276 IsEmpty]: Start isEmpty. Operand 3048 states and 4463 transitions. [2021-11-25 20:08:03,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2021-11-25 20:08:03,293 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:08:03,294 INFO L514 BasicCegarLoop]: trace histogram [16, 14, 14, 7, 6, 6, 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, 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] [2021-11-25 20:08:03,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-25 20:08:03,294 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)] === [2021-11-25 20:08:03,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:08:03,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1927555673, now seen corresponding path program 1 times [2021-11-25 20:08:03,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:08:03,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305407543] [2021-11-25 20:08:03,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:08:03,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:08:03,687 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:08:03,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1671296930] [2021-11-25 20:08:03,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:08:03,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:08:03,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:08:03,693 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:08:03,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 20:08:06,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:08:06,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 6947 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 20:08:06,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:08:06,936 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 379 proven. 0 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2021-11-25 20:08:06,937 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:08:06,937 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:08:06,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305407543] [2021-11-25 20:08:06,937 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:08:06,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671296930] [2021-11-25 20:08:06,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671296930] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:08:06,938 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:08:06,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:08:06,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044515805] [2021-11-25 20:08:06,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:08:06,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:08:06,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:08:06,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:08:06,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:08:06,941 INFO L87 Difference]: Start difference. First operand 3048 states and 4463 transitions. Second operand has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 2 states have call successors, (97), 2 states have call predecessors, (97), 2 states have return successors, (89), 2 states have call predecessors, (89), 2 states have call successors, (89) [2021-11-25 20:08:08,973 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:08:11,721 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:08:15,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:08:15,610 INFO L93 Difference]: Finished difference Result 6085 states and 9018 transitions. [2021-11-25 20:08:15,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:08:15,611 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 2 states have call successors, (97), 2 states have call predecessors, (97), 2 states have return successors, (89), 2 states have call predecessors, (89), 2 states have call successors, (89) Word has length 468 [2021-11-25 20:08:15,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:08:15,624 INFO L225 Difference]: With dead ends: 6085 [2021-11-25 20:08:15,624 INFO L226 Difference]: Without dead ends: 3051 [2021-11-25 20:08:15,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 466 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:08:15,648 INFO L933 BasicCegarLoop]: 3724 mSDtfsCounter, 0 mSDsluCounter, 4201 mSDsCounter, 0 mSdLazyCounter, 975 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7442 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 975 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:08:15,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 7442 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 975 Invalid, 2 Unknown, 0 Unchecked, 8.5s Time] [2021-11-25 20:08:15,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3051 states. [2021-11-25 20:08:15,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3051 to 3051. [2021-11-25 20:08:15,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3051 states, 1888 states have (on average 1.3257415254237288) internal successors, (2503), 1950 states have internal predecessors, (2503), 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) [2021-11-25 20:08:15,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3051 states to 3051 states and 4466 transitions. [2021-11-25 20:08:15,895 INFO L78 Accepts]: Start accepts. Automaton has 3051 states and 4466 transitions. Word has length 468 [2021-11-25 20:08:15,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:08:15,897 INFO L470 AbstractCegarLoop]: Abstraction has 3051 states and 4466 transitions. [2021-11-25 20:08:15,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 2 states have call successors, (97), 2 states have call predecessors, (97), 2 states have return successors, (89), 2 states have call predecessors, (89), 2 states have call successors, (89) [2021-11-25 20:08:15,898 INFO L276 IsEmpty]: Start isEmpty. Operand 3051 states and 4466 transitions. [2021-11-25 20:08:15,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2021-11-25 20:08:15,939 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:08:15,939 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 7, 7, 6, 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, 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] [2021-11-25 20:08:15,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 20:08:16,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-25 20:08:16,168 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)] === [2021-11-25 20:08:16,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:08:16,169 INFO L85 PathProgramCache]: Analyzing trace with hash 633120216, now seen corresponding path program 1 times [2021-11-25 20:08:16,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:08:16,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809535195] [2021-11-25 20:08:16,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:08:16,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:08:16,561 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:08:16,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [463529411] [2021-11-25 20:08:16,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:08:16,562 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:08:16,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:08:16,563 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:08:16,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 20:08:19,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:08:19,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 7178 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 20:08:19,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:08:19,873 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2021-11-25 20:08:19,873 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:08:19,873 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:08:19,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809535195] [2021-11-25 20:08:19,874 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:08:19,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463529411] [2021-11-25 20:08:19,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463529411] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:08:19,874 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:08:19,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:08:19,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463069970] [2021-11-25 20:08:19,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:08:19,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:08:19,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:08:19,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:08:19,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:08:19,876 INFO L87 Difference]: Start difference. First operand 3051 states and 4466 transitions. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 2 states have call successors, (94), 2 states have call predecessors, (94), 2 states have return successors, (87), 2 states have call predecessors, (87), 2 states have call successors, (87) [2021-11-25 20:08:21,915 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:08:26,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:08:26,881 INFO L93 Difference]: Finished difference Result 6211 states and 9186 transitions. [2021-11-25 20:08:26,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:08:26,883 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 2 states have call successors, (94), 2 states have call predecessors, (94), 2 states have return successors, (87), 2 states have call predecessors, (87), 2 states have call successors, (87) Word has length 489 [2021-11-25 20:08:26,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:08:26,900 INFO L225 Difference]: With dead ends: 6211 [2021-11-25 20:08:26,900 INFO L226 Difference]: Without dead ends: 3174 [2021-11-25 20:08:26,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 487 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:08:26,932 INFO L933 BasicCegarLoop]: 3779 mSDtfsCounter, 99 mSDsluCounter, 4216 mSDsCounter, 0 mSdLazyCounter, 978 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 7510 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 978 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2021-11-25 20:08:26,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 7510 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 978 Invalid, 1 Unknown, 0 Unchecked, 6.8s Time] [2021-11-25 20:08:26,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3174 states. [2021-11-25 20:08:27,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3174 to 3052. [2021-11-25 20:08:27,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3052 states, 1889 states have (on average 1.3255690841715193) internal successors, (2504), 1951 states have internal predecessors, (2504), 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) [2021-11-25 20:08:27,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3052 states to 3052 states and 4467 transitions. [2021-11-25 20:08:27,199 INFO L78 Accepts]: Start accepts. Automaton has 3052 states and 4467 transitions. Word has length 489 [2021-11-25 20:08:27,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:08:27,201 INFO L470 AbstractCegarLoop]: Abstraction has 3052 states and 4467 transitions. [2021-11-25 20:08:27,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 2 states have call successors, (94), 2 states have call predecessors, (94), 2 states have return successors, (87), 2 states have call predecessors, (87), 2 states have call successors, (87) [2021-11-25 20:08:27,201 INFO L276 IsEmpty]: Start isEmpty. Operand 3052 states and 4467 transitions. [2021-11-25 20:08:27,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2021-11-25 20:08:27,249 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:08:27,249 INFO L514 BasicCegarLoop]: trace histogram [16, 14, 14, 8, 6, 6, 5, 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, 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] [2021-11-25 20:08:27,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 20:08:27,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-25 20:08:27,476 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)] === [2021-11-25 20:08:27,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:08:27,477 INFO L85 PathProgramCache]: Analyzing trace with hash 218554641, now seen corresponding path program 1 times [2021-11-25 20:08:27,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:08:27,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152156328] [2021-11-25 20:08:27,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:08:27,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:08:27,867 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:08:27,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [60251292] [2021-11-25 20:08:27,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:08:27,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:08:27,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:08:27,869 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:08:27,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 20:08:30,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:08:30,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 6995 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:08:30,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:08:31,516 INFO L134 CoverageAnalysis]: Checked inductivity of 740 backedges. 385 proven. 0 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2021-11-25 20:08:31,516 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:08:31,517 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:08:31,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152156328] [2021-11-25 20:08:31,517 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:08:31,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60251292] [2021-11-25 20:08:31,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60251292] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:08:31,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:08:31,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:08:31,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752724530] [2021-11-25 20:08:31,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:08:31,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:08:31,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:08:31,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:08:31,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:08:31,520 INFO L87 Difference]: Start difference. First operand 3052 states and 4467 transitions. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 3 states have call successors, (99), 2 states have call predecessors, (99), 2 states have return successors, (91), 3 states have call predecessors, (91), 3 states have call successors, (91) [2021-11-25 20:08:33,547 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:08:38,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:08:38,542 INFO L93 Difference]: Finished difference Result 6096 states and 9017 transitions. [2021-11-25 20:08:38,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:08:38,543 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 3 states have call successors, (99), 2 states have call predecessors, (99), 2 states have return successors, (91), 3 states have call predecessors, (91), 3 states have call successors, (91) Word has length 478 [2021-11-25 20:08:38,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:08:38,553 INFO L225 Difference]: With dead ends: 6096 [2021-11-25 20:08:38,553 INFO L226 Difference]: Without dead ends: 3058 [2021-11-25 20:08:38,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 476 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:08:38,565 INFO L933 BasicCegarLoop]: 3724 mSDtfsCounter, 4 mSDsluCounter, 4203 mSDsCounter, 0 mSdLazyCounter, 981 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 7441 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 981 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2021-11-25 20:08:38,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 7441 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 981 Invalid, 1 Unknown, 0 Unchecked, 6.8s Time] [2021-11-25 20:08:38,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3058 states. [2021-11-25 20:08:39,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3058 to 3056. [2021-11-25 20:08:39,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3056 states, 1892 states have (on average 1.3255813953488371) internal successors, (2508), 1954 states have internal predecessors, (2508), 982 states have call successors, (982), 183 states have call predecessors, (982), 180 states have return successors, (983), 962 states have call predecessors, (983), 982 states have call successors, (983) [2021-11-25 20:08:39,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3056 states to 3056 states and 4473 transitions. [2021-11-25 20:08:39,046 INFO L78 Accepts]: Start accepts. Automaton has 3056 states and 4473 transitions. Word has length 478 [2021-11-25 20:08:39,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:08:39,047 INFO L470 AbstractCegarLoop]: Abstraction has 3056 states and 4473 transitions. [2021-11-25 20:08:39,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 3 states have call successors, (99), 2 states have call predecessors, (99), 2 states have return successors, (91), 3 states have call predecessors, (91), 3 states have call successors, (91) [2021-11-25 20:08:39,047 INFO L276 IsEmpty]: Start isEmpty. Operand 3056 states and 4473 transitions. [2021-11-25 20:08:39,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2021-11-25 20:08:39,098 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:08:39,099 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 8, 7, 6, 6, 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, 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] [2021-11-25 20:08:39,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 20:08:39,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:08:39,324 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)] === [2021-11-25 20:08:39,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:08:39,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1502126236, now seen corresponding path program 1 times [2021-11-25 20:08:39,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:08:39,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930197001] [2021-11-25 20:08:39,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:08:39,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:08:39,674 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:08:39,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [805086951] [2021-11-25 20:08:39,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:08:39,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:08:39,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:08:39,676 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:08:39,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 20:08:42,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:08:42,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 7227 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 20:08:42,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:08:43,182 INFO L134 CoverageAnalysis]: Checked inductivity of 810 backedges. 430 proven. 0 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2021-11-25 20:08:43,182 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:08:43,182 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:08:43,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930197001] [2021-11-25 20:08:43,182 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:08:43,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805086951] [2021-11-25 20:08:43,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805086951] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:08:43,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:08:43,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:08:43,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274967355] [2021-11-25 20:08:43,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:08:43,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:08:43,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:08:43,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:08:43,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:08:43,187 INFO L87 Difference]: Start difference. First operand 3056 states and 4473 transitions. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 2 states have call successors, (103), 2 states have call predecessors, (103), 2 states have return successors, (95), 2 states have call predecessors, (95), 2 states have call successors, (95) [2021-11-25 20:08:45,227 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:08:50,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:08:50,309 INFO L93 Difference]: Finished difference Result 6097 states and 9018 transitions. [2021-11-25 20:08:50,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:08:50,311 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 2 states have call successors, (103), 2 states have call predecessors, (103), 2 states have return successors, (95), 2 states have call predecessors, (95), 2 states have call successors, (95) Word has length 502 [2021-11-25 20:08:50,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:08:50,324 INFO L225 Difference]: With dead ends: 6097 [2021-11-25 20:08:50,324 INFO L226 Difference]: Without dead ends: 3055 [2021-11-25 20:08:50,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 500 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:08:50,340 INFO L933 BasicCegarLoop]: 3724 mSDtfsCounter, 1 mSDsluCounter, 4199 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 7439 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2021-11-25 20:08:50,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 7439 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 983 Invalid, 1 Unknown, 0 Unchecked, 6.9s Time] [2021-11-25 20:08:50,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3055 states. [2021-11-25 20:08:50,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3055 to 3053. [2021-11-25 20:08:50,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3053 states, 1890 states have (on average 1.3253968253968254) internal successors, (2505), 1952 states have internal predecessors, (2505), 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) [2021-11-25 20:08:50,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3053 states to 3053 states and 4468 transitions. [2021-11-25 20:08:50,600 INFO L78 Accepts]: Start accepts. Automaton has 3053 states and 4468 transitions. Word has length 502 [2021-11-25 20:08:50,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:08:50,601 INFO L470 AbstractCegarLoop]: Abstraction has 3053 states and 4468 transitions. [2021-11-25 20:08:50,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 2 states have call successors, (103), 2 states have call predecessors, (103), 2 states have return successors, (95), 2 states have call predecessors, (95), 2 states have call successors, (95) [2021-11-25 20:08:50,601 INFO L276 IsEmpty]: Start isEmpty. Operand 3053 states and 4468 transitions. [2021-11-25 20:08:50,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2021-11-25 20:08:50,628 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:08:50,628 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 8, 7, 6, 5, 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, 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] [2021-11-25 20:08:50,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 20:08:50,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:08:50,844 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)] === [2021-11-25 20:08:50,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:08:50,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1430801191, now seen corresponding path program 1 times [2021-11-25 20:08:50,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:08:50,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867463014] [2021-11-25 20:08:50,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:08:50,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:08:51,214 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:08:51,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [372061278] [2021-11-25 20:08:51,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:08:51,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:08:51,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:08:51,216 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:08:51,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 20:08:53,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:08:53,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 7223 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:08:53,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:08:54,756 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 424 proven. 1 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-11-25 20:08:54,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:08:55,999 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 793 trivial. 0 not checked. [2021-11-25 20:08:55,999 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:08:55,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867463014] [2021-11-25 20:08:55,999 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:08:55,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372061278] [2021-11-25 20:08:55,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372061278] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:08:56,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1806585024] [2021-11-25 20:08:56,033 INFO L159 IcfgInterpreter]: Started Sifa with 319 locations of interest [2021-11-25 20:08:56,033 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:08:56,041 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 20:08:56,043 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 20:08:56,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-25 20:08:56,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610109536] [2021-11-25 20:08:56,044 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 20:08:56,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:08:56,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:08:56,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:08:56,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:08:56,047 INFO L87 Difference]: Start difference. First operand 3053 states and 4468 transitions. Second operand has 6 states, 6 states have (on average 45.166666666666664) internal successors, (271), 6 states have internal predecessors, (271), 2 states have call successors, (154), 2 states have call predecessors, (154), 2 states have return successors, (148), 2 states have call predecessors, (148), 2 states have call successors, (148) [2021-11-25 20:08:58,088 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:09:09,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:09:09,236 INFO L93 Difference]: Finished difference Result 6101 states and 9040 transitions. [2021-11-25 20:09:09,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:09:09,237 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 45.166666666666664) internal successors, (271), 6 states have internal predecessors, (271), 2 states have call successors, (154), 2 states have call predecessors, (154), 2 states have return successors, (148), 2 states have call predecessors, (148), 2 states have call successors, (148) Word has length 503 [2021-11-25 20:09:09,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:09:09,250 INFO L225 Difference]: With dead ends: 6101 [2021-11-25 20:09:09,250 INFO L226 Difference]: Without dead ends: 3062 [2021-11-25 20:09:09,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1004 GetRequests, 1000 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:09:09,270 INFO L933 BasicCegarLoop]: 3724 mSDtfsCounter, 0 mSDsluCounter, 16808 mSDsCounter, 0 mSdLazyCounter, 2447 mSolverCounterSat, 17 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18596 SdHoareTripleChecker+Invalid, 2465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 2447 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:09:09,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 18596 Invalid, 2465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 2447 Invalid, 1 Unknown, 0 Unchecked, 13.0s Time] [2021-11-25 20:09:09,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3062 states. [2021-11-25 20:09:09,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3062 to 3062. [2021-11-25 20:09:09,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3062 states, 1899 states have (on average 1.3238546603475514) internal successors, (2514), 1961 states have internal predecessors, (2514), 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) [2021-11-25 20:09:09,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3062 states to 3062 states and 4477 transitions. [2021-11-25 20:09:09,523 INFO L78 Accepts]: Start accepts. Automaton has 3062 states and 4477 transitions. Word has length 503 [2021-11-25 20:09:09,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:09:09,524 INFO L470 AbstractCegarLoop]: Abstraction has 3062 states and 4477 transitions. [2021-11-25 20:09:09,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 45.166666666666664) internal successors, (271), 6 states have internal predecessors, (271), 2 states have call successors, (154), 2 states have call predecessors, (154), 2 states have return successors, (148), 2 states have call predecessors, (148), 2 states have call successors, (148) [2021-11-25 20:09:09,525 INFO L276 IsEmpty]: Start isEmpty. Operand 3062 states and 4477 transitions. [2021-11-25 20:09:09,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2021-11-25 20:09:09,547 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:09:09,547 INFO L514 BasicCegarLoop]: trace histogram [16, 14, 14, 8, 6, 6, 5, 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, 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] [2021-11-25 20:09:09,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 20:09:09,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-25 20:09:09,768 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)] === [2021-11-25 20:09:09,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:09:09,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1698754518, now seen corresponding path program 1 times [2021-11-25 20:09:09,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:09:09,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646859228] [2021-11-25 20:09:09,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:09,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:09:10,102 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:09:10,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1414344962] [2021-11-25 20:09:10,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:10,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:09:10,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:09:10,108 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:09:10,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 20:09:12,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:09:12,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 7056 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 20:09:12,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:09:13,726 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 389 proven. 10 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2021-11-25 20:09:13,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:09:14,863 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2021-11-25 20:09:14,863 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:09:14,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646859228] [2021-11-25 20:09:14,863 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:09:14,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414344962] [2021-11-25 20:09:14,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414344962] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:09:14,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [837642622] [2021-11-25 20:09:14,874 INFO L159 IcfgInterpreter]: Started Sifa with 310 locations of interest [2021-11-25 20:09:14,874 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:09:14,876 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 20:09:14,877 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 20:09:14,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-11-25 20:09:14,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181710495] [2021-11-25 20:09:14,878 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 20:09:14,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:09:14,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:09:14,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:09:14,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:09:14,880 INFO L87 Difference]: Start difference. First operand 3062 states and 4477 transitions. Second operand has 8 states, 8 states have (on average 32.875) internal successors, (263), 8 states have internal predecessors, (263), 2 states have call successors, (147), 2 states have call predecessors, (147), 2 states have return successors, (141), 2 states have call predecessors, (141), 2 states have call successors, (141) [2021-11-25 20:09:16,911 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:09:25,296 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:09:27,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:09:27,234 INFO L93 Difference]: Finished difference Result 6116 states and 9052 transitions. [2021-11-25 20:09:27,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 20:09:27,236 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 32.875) internal successors, (263), 8 states have internal predecessors, (263), 2 states have call successors, (147), 2 states have call predecessors, (147), 2 states have return successors, (141), 2 states have call predecessors, (141), 2 states have call successors, (141) Word has length 486 [2021-11-25 20:09:27,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:09:27,253 INFO L225 Difference]: With dead ends: 6116 [2021-11-25 20:09:27,253 INFO L226 Difference]: Without dead ends: 3068 [2021-11-25 20:09:27,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 970 GetRequests, 964 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:09:27,270 INFO L933 BasicCegarLoop]: 3724 mSDtfsCounter, 0 mSDsluCounter, 12606 mSDsCounter, 0 mSdLazyCounter, 1966 mSolverCounterSat, 23 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14878 SdHoareTripleChecker+Invalid, 1990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1966 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:09:27,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14878 Invalid, 1990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1966 Invalid, 1 Unknown, 0 Unchecked, 12.1s Time] [2021-11-25 20:09:27,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3068 states. [2021-11-25 20:09:27,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3068 to 3068. [2021-11-25 20:09:27,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3068 states, 1905 states have (on average 1.3228346456692914) internal successors, (2520), 1967 states have internal predecessors, (2520), 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) [2021-11-25 20:09:27,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3068 states to 3068 states and 4483 transitions. [2021-11-25 20:09:27,524 INFO L78 Accepts]: Start accepts. Automaton has 3068 states and 4483 transitions. Word has length 486 [2021-11-25 20:09:27,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:09:27,525 INFO L470 AbstractCegarLoop]: Abstraction has 3068 states and 4483 transitions. [2021-11-25 20:09:27,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 32.875) internal successors, (263), 8 states have internal predecessors, (263), 2 states have call successors, (147), 2 states have call predecessors, (147), 2 states have return successors, (141), 2 states have call predecessors, (141), 2 states have call successors, (141) [2021-11-25 20:09:27,525 INFO L276 IsEmpty]: Start isEmpty. Operand 3068 states and 4483 transitions. [2021-11-25 20:09:27,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2021-11-25 20:09:27,549 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:09:27,550 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 8, 7, 6, 6, 5, 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, 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] [2021-11-25 20:09:27,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 20:09:27,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:09:27,776 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)] === [2021-11-25 20:09:27,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:09:27,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1064522640, now seen corresponding path program 2 times [2021-11-25 20:09:27,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:09:27,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537046766] [2021-11-25 20:09:27,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:27,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:09:28,216 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:09:28,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1091385904] [2021-11-25 20:09:28,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:09:28,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:09:28,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:09:28,226 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:09:28,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16a4161e-8588-4f36-b37e-5f6d8a4f4f61/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process