./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d53e27-430a-4b50-a5ae-51496efefd3e/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d53e27-430a-4b50-a5ae-51496efefd3e/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d53e27-430a-4b50-a5ae-51496efefd3e/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d53e27-430a-4b50-a5ae-51496efefd3e/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d53e27-430a-4b50-a5ae-51496efefd3e/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d53e27-430a-4b50-a5ae-51496efefd3e/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 23f9845edcf139ee9434428d040789a6781b16714bf615b854712f008daec6fd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:48:02,919 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:48:02,923 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:48:02,992 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:48:02,993 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:48:02,994 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:48:02,997 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:48:03,000 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:48:03,003 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:48:03,005 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:48:03,006 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:48:03,008 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:48:03,009 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:48:03,011 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:48:03,013 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:48:03,016 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:48:03,017 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:48:03,019 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:48:03,022 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:48:03,026 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:48:03,028 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:48:03,031 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:48:03,033 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:48:03,034 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:48:03,044 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:48:03,049 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:48:03,050 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:48:03,052 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:48:03,057 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:48:03,059 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:48:03,060 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:48:03,062 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:48:03,064 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:48:03,065 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:48:03,068 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:48:03,069 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:48:03,071 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:48:03,071 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:48:03,072 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:48:03,073 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:48:03,074 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:48:03,075 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d53e27-430a-4b50-a5ae-51496efefd3e/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-21 00:48:03,133 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:48:03,133 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:48:03,134 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:48:03,134 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:48:03,136 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:48:03,136 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:48:03,136 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:48:03,137 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:48:03,137 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:48:03,137 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:48:03,139 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:48:03,139 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:48:03,140 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:48:03,140 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:48:03,140 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:48:03,141 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:48:03,141 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:48:03,141 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:48:03,143 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:48:03,143 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:48:03,144 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:48:03,144 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:48:03,144 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:48:03,145 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:48:03,145 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:48:03,146 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:48:03,150 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:48:03,151 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:48:03,152 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:48:03,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:48:03,153 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:48:03,153 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:48:03,153 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:48:03,154 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:48:03,154 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:48:03,155 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:48:03,155 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:48:03,155 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:48:03,156 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_96d53e27-430a-4b50-a5ae-51496efefd3e/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d53e27-430a-4b50-a5ae-51496efefd3e/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23f9845edcf139ee9434428d040789a6781b16714bf615b854712f008daec6fd [2021-11-21 00:48:03,531 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:48:03,562 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:48:03,567 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:48:03,569 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:48:03,570 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:48:03,572 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d53e27-430a-4b50-a5ae-51496efefd3e/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i [2021-11-21 00:48:03,671 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d53e27-430a-4b50-a5ae-51496efefd3e/bin/utaipan-TEXQjIfE4P/data/af497f38e/078b09cd61814196a256820699d8fb9c/FLAGb1a2be280 [2021-11-21 00:48:04,855 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:48:04,856 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d53e27-430a-4b50-a5ae-51496efefd3e/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i [2021-11-21 00:48:04,932 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d53e27-430a-4b50-a5ae-51496efefd3e/bin/utaipan-TEXQjIfE4P/data/af497f38e/078b09cd61814196a256820699d8fb9c/FLAGb1a2be280 [2021-11-21 00:48:05,098 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d53e27-430a-4b50-a5ae-51496efefd3e/bin/utaipan-TEXQjIfE4P/data/af497f38e/078b09cd61814196a256820699d8fb9c [2021-11-21 00:48:05,100 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:48:05,102 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:48:05,105 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:48:05,105 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:48:05,110 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:48:05,111 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:48:05" (1/1) ... [2021-11-21 00:48:05,112 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23f68ed3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:48:05, skipping insertion in model container [2021-11-21 00:48:05,113 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:48:05" (1/1) ... [2021-11-21 00:48:05,122 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:48:05,335 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:48:09,038 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_96d53e27-430a-4b50-a5ae-51496efefd3e/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i[338234,338247] [2021-11-21 00:48:09,042 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_96d53e27-430a-4b50-a5ae-51496efefd3e/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i[338403,338416] [2021-11-21 00:48:09,049 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_96d53e27-430a-4b50-a5ae-51496efefd3e/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i[338570,338583] [2021-11-21 00:48:09,050 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_96d53e27-430a-4b50-a5ae-51496efefd3e/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i[338738,338751] [2021-11-21 00:48:09,090 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:48:09,167 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:48:09,661 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_96d53e27-430a-4b50-a5ae-51496efefd3e/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i[338234,338247] [2021-11-21 00:48:09,662 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_96d53e27-430a-4b50-a5ae-51496efefd3e/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i[338403,338416] [2021-11-21 00:48:09,663 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_96d53e27-430a-4b50-a5ae-51496efefd3e/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i[338570,338583] [2021-11-21 00:48:09,663 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_96d53e27-430a-4b50-a5ae-51496efefd3e/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i[338738,338751] [2021-11-21 00:48:09,674 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:48:09,882 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:48:09,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:48:09 WrapperNode [2021-11-21 00:48:09,883 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:48:09,885 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:48:09,885 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:48:09,885 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:48:09,895 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:48:09" (1/1) ... [2021-11-21 00:48:10,059 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:48:09" (1/1) ... [2021-11-21 00:48:10,315 INFO L137 Inliner]: procedures = 431, calls = 2260, calls flagged for inlining = 195, calls inlined = 179, statements flattened = 4820 [2021-11-21 00:48:10,315 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:48:10,317 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:48:10,317 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:48:10,318 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:48:10,329 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:48:09" (1/1) ... [2021-11-21 00:48:10,329 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:48:09" (1/1) ... [2021-11-21 00:48:10,394 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:48:09" (1/1) ... [2021-11-21 00:48:10,396 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:48:09" (1/1) ... [2021-11-21 00:48:10,648 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:48:09" (1/1) ... [2021-11-21 00:48:10,678 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:48:09" (1/1) ... [2021-11-21 00:48:10,715 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:48:09" (1/1) ... [2021-11-21 00:48:10,775 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:48:10,777 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:48:10,777 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:48:10,778 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:48:10,779 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:48:09" (1/1) ... [2021-11-21 00:48:10,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:48:10,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d53e27-430a-4b50-a5ae-51496efefd3e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:48:10,819 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d53e27-430a-4b50-a5ae-51496efefd3e/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:48:10,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d53e27-430a-4b50-a5ae-51496efefd3e/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:48:10,875 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_resume [2021-11-21 00:48:10,875 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_resume [2021-11-21 00:48:10,875 INFO L130 BoogieDeclarations]: Found specification of procedure pci_release_regions [2021-11-21 00:48:10,876 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_release_regions [2021-11-21 00:48:10,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-21 00:48:10,876 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-21 00:48:10,876 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-21 00:48:10,876 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-21 00:48:10,876 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_mii_write_reg [2021-11-21 00:48:10,877 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_mii_write_reg [2021-11-21 00:48:10,877 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-21 00:48:10,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-21 00:48:10,877 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_timer_timer_instance_3 [2021-11-21 00:48:10,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_timer_timer_instance_3 [2021-11-21 00:48:10,878 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_dio_read8 [2021-11-21 00:48:10,878 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_dio_read8 [2021-11-21 00:48:10,878 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-21 00:48:10,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-21 00:48:10,878 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2021-11-21 00:48:10,879 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2021-11-21 00:48:10,879 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_63 [2021-11-21 00:48:10,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_63 [2021-11-21 00:48:10,879 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_lock_of_tlan_priv [2021-11-21 00:48:10,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_lock_of_tlan_priv [2021-11-21 00:48:10,879 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_read_and_clear_stats [2021-11-21 00:48:10,880 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_read_and_clear_stats [2021-11-21 00:48:10,880 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_mii_sync [2021-11-21 00:48:10,880 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_mii_sync [2021-11-21 00:48:10,880 INFO L130 BoogieDeclarations]: Found specification of procedure pci_get_drvdata [2021-11-21 00:48:10,880 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_get_drvdata [2021-11-21 00:48:10,881 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-21 00:48:10,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-21 00:48:10,881 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-21 00:48:10,881 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-21 00:48:10,881 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-21 00:48:10,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-21 00:48:10,882 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unmap_single [2021-11-21 00:48:10,882 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unmap_single [2021-11-21 00:48:10,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 00:48:10,882 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-21 00:48:10,883 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-21 00:48:10,883 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_reset_lists [2021-11-21 00:48:10,883 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_reset_lists [2021-11-21 00:48:10,884 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_close [2021-11-21 00:48:10,885 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_close [2021-11-21 00:48:10,886 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mod_timer_65 [2021-11-21 00:48:10,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mod_timer_65 [2021-11-21 00:48:10,886 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-21 00:48:10,886 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-21 00:48:10,886 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_phy_print [2021-11-21 00:48:10,887 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_phy_print [2021-11-21 00:48:10,887 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_netdev [2021-11-21 00:48:10,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_netdev [2021-11-21 00:48:10,887 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_lock_of_tlan_priv [2021-11-21 00:48:10,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_lock_of_tlan_priv [2021-11-21 00:48:10,888 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_pci_unregister_driver [2021-11-21 00:48:10,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_pci_unregister_driver [2021-11-21 00:48:10,889 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_probe1 [2021-11-21 00:48:10,889 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_probe1 [2021-11-21 00:48:10,889 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-21 00:48:10,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-21 00:48:10,890 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 00:48:10,890 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2021-11-21 00:48:10,890 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2021-11-21 00:48:10,890 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_interrupt_context [2021-11-21 00:48:10,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_interrupt_context [2021-11-21 00:48:10,891 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2021-11-21 00:48:10,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2021-11-21 00:48:10,891 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_err_code [2021-11-21 00:48:10,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_err_code [2021-11-21 00:48:10,892 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_set_timer [2021-11-21 00:48:10,892 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_set_timer [2021-11-21 00:48:10,893 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_timer [2021-11-21 00:48:10,893 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_timer [2021-11-21 00:48:10,893 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_timer_instance_callback_3_2 [2021-11-21 00:48:10,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_timer_instance_callback_3_2 [2021-11-21 00:48:10,893 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_stop [2021-11-21 00:48:10,894 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_stop [2021-11-21 00:48:10,894 INFO L130 BoogieDeclarations]: Found specification of procedure pci_free_consistent [2021-11-21 00:48:10,895 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_free_consistent [2021-11-21 00:48:10,895 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2021-11-21 00:48:10,895 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2021-11-21 00:48:10,895 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_remove_one [2021-11-21 00:48:10,896 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_remove_one [2021-11-21 00:48:10,896 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_get_skb [2021-11-21 00:48:10,897 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_get_skb [2021-11-21 00:48:10,897 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_ee_send_byte [2021-11-21 00:48:10,898 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_ee_send_byte [2021-11-21 00:48:10,898 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-21 00:48:10,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-21 00:48:10,898 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 00:48:10,898 INFO L130 BoogieDeclarations]: Found specification of procedure inb_p [2021-11-21 00:48:10,899 INFO L138 BoogieDeclarations]: Found implementation of procedure inb_p [2021-11-21 00:48:10,899 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_poll [2021-11-21 00:48:10,899 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_poll [2021-11-21 00:48:10,899 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mod_timer [2021-11-21 00:48:10,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mod_timer [2021-11-21 00:48:10,900 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:48:10,900 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-21 00:48:10,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-21 00:48:10,901 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-21 00:48:10,901 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-21 00:48:10,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 00:48:10,901 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-21 00:48:10,902 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-21 00:48:10,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-21 00:48:10,906 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_free_lists [2021-11-21 00:48:10,908 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_free_lists [2021-11-21 00:48:10,908 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_spin_lock [2021-11-21 00:48:10,908 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_spin_lock [2021-11-21 00:48:10,909 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-21 00:48:10,910 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-21 00:48:10,910 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2021-11-21 00:48:10,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2021-11-21 00:48:10,910 INFO L130 BoogieDeclarations]: Found specification of procedure outb_p [2021-11-21 00:48:10,915 INFO L138 BoogieDeclarations]: Found implementation of procedure outb_p [2021-11-21 00:48:10,916 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~TO~VOID [2021-11-21 00:48:10,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~TO~VOID [2021-11-21 00:48:10,916 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_store_skb [2021-11-21 00:48:10,916 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_store_skb [2021-11-21 00:48:10,916 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_tx_timeout [2021-11-21 00:48:10,916 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_tx_timeout [2021-11-21 00:48:10,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:48:10,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:48:10,917 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unregister_driver [2021-11-21 00:48:10,917 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unregister_driver [2021-11-21 00:48:10,917 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_phy_power_up [2021-11-21 00:48:10,917 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_phy_power_up [2021-11-21 00:48:10,917 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-21 00:48:10,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-21 00:48:10,918 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-21 00:48:10,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-21 00:48:10,918 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_off [2021-11-21 00:48:10,918 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_off [2021-11-21 00:48:10,918 INFO L130 BoogieDeclarations]: Found specification of procedure slow_down_io [2021-11-21 00:48:10,919 INFO L138 BoogieDeclarations]: Found implementation of procedure slow_down_io [2021-11-21 00:48:10,919 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_handle_interrupt [2021-11-21 00:48:10,919 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_handle_interrupt [2021-11-21 00:48:10,919 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_start [2021-11-21 00:48:10,919 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_start [2021-11-21 00:48:10,919 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_process_context [2021-11-21 00:48:10,920 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_process_context [2021-11-21 00:48:10,920 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_phy_finish_auto_neg [2021-11-21 00:48:10,920 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_phy_finish_auto_neg [2021-11-21 00:48:10,920 INFO L130 BoogieDeclarations]: Found specification of procedure pci_map_single [2021-11-21 00:48:10,920 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_map_single [2021-11-21 00:48:10,920 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-21 00:48:10,920 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-21 00:48:10,921 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_alloc_skb_ip_align [2021-11-21 00:48:10,921 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_alloc_skb_ip_align [2021-11-21 00:48:10,921 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_phy_start_link [2021-11-21 00:48:10,921 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_phy_start_link [2021-11-21 00:48:10,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 00:48:10,921 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_set_multicast_list [2021-11-21 00:48:10,922 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_set_multicast_list [2021-11-21 00:48:10,922 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2021-11-21 00:48:10,922 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2021-11-21 00:48:10,922 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 00:48:10,922 INFO L130 BoogieDeclarations]: Found specification of procedure add_timer [2021-11-21 00:48:10,922 INFO L138 BoogieDeclarations]: Found implementation of procedure add_timer [2021-11-21 00:48:10,923 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dispatch_instance_register_8_2 [2021-11-21 00:48:10,923 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dispatch_instance_register_8_2 [2021-11-21 00:48:10,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 00:48:10,923 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_print_list [2021-11-21 00:48:10,923 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_print_list [2021-11-21 00:48:10,923 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_dio_write16 [2021-11-21 00:48:10,923 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_dio_write16 [2021-11-21 00:48:10,924 INFO L130 BoogieDeclarations]: Found specification of procedure outw [2021-11-21 00:48:10,924 INFO L138 BoogieDeclarations]: Found implementation of procedure outw [2021-11-21 00:48:10,924 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-21 00:48:10,926 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-21 00:48:10,926 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2021-11-21 00:48:10,926 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2021-11-21 00:48:10,926 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-21 00:48:10,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-21 00:48:10,927 INFO L130 BoogieDeclarations]: Found specification of procedure outl [2021-11-21 00:48:10,927 INFO L138 BoogieDeclarations]: Found implementation of procedure outl [2021-11-21 00:48:10,927 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_finish_reset [2021-11-21 00:48:10,927 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_finish_reset [2021-11-21 00:48:10,927 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_dio_write32 [2021-11-21 00:48:10,928 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_dio_write32 [2021-11-21 00:48:10,928 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-11-21 00:48:10,928 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-11-21 00:48:10,928 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-21 00:48:10,928 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-21 00:48:10,928 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_set_mac [2021-11-21 00:48:10,929 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_set_mac [2021-11-21 00:48:10,929 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2021-11-21 00:48:10,929 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2021-11-21 00:48:10,929 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_ee_send_start [2021-11-21 00:48:10,929 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_ee_send_start [2021-11-21 00:48:10,929 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_dio_read32 [2021-11-21 00:48:10,929 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_dio_read32 [2021-11-21 00:48:10,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 00:48:10,930 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_dio_write8 [2021-11-21 00:48:10,930 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_dio_write8 [2021-11-21 00:48:10,930 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-21 00:48:10,930 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-21 00:48:10,930 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_phy_power_down [2021-11-21 00:48:10,931 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_phy_power_down [2021-11-21 00:48:10,931 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_any [2021-11-21 00:48:10,931 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_any [2021-11-21 00:48:10,931 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_reset_adapter [2021-11-21 00:48:10,931 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_reset_adapter [2021-11-21 00:48:10,931 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_mii_send_data [2021-11-21 00:48:10,932 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_mii_send_data [2021-11-21 00:48:10,932 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_phy_reset [2021-11-21 00:48:10,932 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_phy_reset [2021-11-21 00:48:10,932 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_mii_read_reg [2021-11-21 00:48:10,932 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_mii_read_reg [2021-11-21 00:48:10,932 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-21 00:48:10,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-21 00:48:10,933 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_open [2021-11-21 00:48:10,933 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_open [2021-11-21 00:48:10,933 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_power_state [2021-11-21 00:48:10,933 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_power_state [2021-11-21 00:48:10,933 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2021-11-21 00:48:10,933 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2021-11-21 00:48:10,933 INFO L130 BoogieDeclarations]: Found specification of procedure inl [2021-11-21 00:48:10,934 INFO L138 BoogieDeclarations]: Found implementation of procedure inl [2021-11-21 00:48:10,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:48:10,934 INFO L130 BoogieDeclarations]: Found specification of procedure __request_region [2021-11-21 00:48:10,934 INFO L130 BoogieDeclarations]: Found specification of procedure inw [2021-11-21 00:48:10,934 INFO L138 BoogieDeclarations]: Found implementation of procedure inw [2021-11-21 00:48:10,934 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-21 00:48:10,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-21 00:48:10,935 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_netdev [2021-11-21 00:48:10,935 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_netdev [2021-11-21 00:48:10,935 INFO L130 BoogieDeclarations]: Found specification of procedure preempt_count [2021-11-21 00:48:10,935 INFO L138 BoogieDeclarations]: Found implementation of procedure preempt_count [2021-11-21 00:48:12,164 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:48:12,170 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:48:13,287 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-21 00:48:16,291 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6942: assume 0 == (tlan_eisa_probe_~tmp___1~5#1.base + tlan_eisa_probe_~tmp___1~5#1.offset) % 18446744073709551616; [2021-11-21 00:48:16,291 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6942: assume !(0 == (tlan_eisa_probe_~tmp___1~5#1.base + tlan_eisa_probe_~tmp___1~5#1.offset) % 18446744073709551616); [2021-11-21 00:48:16,292 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L7042: assume tlan_eisa_probe_~ioaddr~0#1 <= 36863; [2021-11-21 00:48:16,292 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L7042: assume !(tlan_eisa_probe_~ioaddr~0#1 <= 36863); [2021-11-21 00:48:16,292 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6976-2: SUMMARY for call tlan_eisa_probe_#t~ret340#1 := inb((if (3264 + tlan_eisa_probe_~ioaddr~0#1) % 4294967296 % 4294967296 <= 2147483647 then (3264 + tlan_eisa_probe_~ioaddr~0#1) % 4294967296 % 4294967296 else (3264 + tlan_eisa_probe_~ioaddr~0#1) % 4294967296 % 4294967296 - 4294967296)); srcloc: null [2021-11-21 00:48:16,292 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6976: assume 16 == ~debug~0;havoc tlan_eisa_probe_#t~nondet339#1; [2021-11-21 00:48:16,292 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6976: assume !(16 == ~debug~0); [2021-11-21 00:48:16,293 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L7044: assume 0 != ~bitwiseAnd(~debug~0, 16); [2021-11-21 00:48:16,293 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L7044: assume !(0 != ~bitwiseAnd(~debug~0, 16)); [2021-11-21 00:48:16,293 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6947-1: tlan_eisa_probe_~tmp___2~2#1 := tlan_eisa_probe_#t~ret336#1;havoc tlan_eisa_probe_#t~ret336#1; [2021-11-21 00:48:16,293 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6947: SUMMARY for call tlan_eisa_probe_#t~ret336#1 := inw((if (3200 + tlan_eisa_probe_~ioaddr~0#1) % 4294967296 % 4294967296 <= 2147483647 then (3200 + tlan_eisa_probe_~ioaddr~0#1) % 4294967296 % 4294967296 else (3200 + tlan_eisa_probe_~ioaddr~0#1) % 4294967296 % 4294967296 - 4294967296)); srcloc: null [2021-11-21 00:48:16,293 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L7014: SUMMARY for call tlan_eisa_probe_#t~ret341#1 := tlan_probe1(0, 0, tlan_eisa_probe_~ioaddr~0#1, tlan_eisa_probe_~irq~0#1, 12, 0, 0); srcloc: null [2021-11-21 00:48:16,293 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6949: assume 4366 != tlan_eisa_probe_~tmp___2~2#1 % 65536 % 4294967296; [2021-11-21 00:48:16,293 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6949: assume !(4366 != tlan_eisa_probe_~tmp___2~2#1 % 65536 % 4294967296); [2021-11-21 00:48:16,294 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6983: tlan_eisa_probe_~tmp___4~0#1 := tlan_eisa_probe_#t~ret340#1;havoc tlan_eisa_probe_#t~ret340#1; [2021-11-21 00:48:16,294 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6951: SUMMARY for call __release_region(~#ioport_resource~0.base, ~#ioport_resource~0.offset, tlan_eisa_probe_~ioaddr~0#1, 16); srcloc: null [2021-11-21 00:48:16,294 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6918-1: assume 0 != ~bitwiseAnd(~debug~0, 16); [2021-11-21 00:48:16,294 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6918-1: assume !(0 != ~bitwiseAnd(~debug~0, 16)); [2021-11-21 00:48:16,294 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6986: assume 16 == tlan_eisa_probe_~tmp___4~0#1 % 256; [2021-11-21 00:48:16,294 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6986: assume !(16 == tlan_eisa_probe_~tmp___4~0#1 % 256); [2021-11-21 00:48:16,294 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6920-1: tlan_eisa_probe_~tmp~35#1 := tlan_eisa_probe_#t~ret330#1;havoc tlan_eisa_probe_#t~ret330#1;havoc tlan_eisa_probe_#t~nondet331#1; [2021-11-21 00:48:16,295 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6920: SUMMARY for call tlan_eisa_probe_#t~ret330#1 := inw((if (3200 + tlan_eisa_probe_~ioaddr~0#1) % 4294967296 % 4294967296 <= 2147483647 then (3200 + tlan_eisa_probe_~ioaddr~0#1) % 4294967296 % 4294967296 else (3200 + tlan_eisa_probe_~ioaddr~0#1) % 4294967296 % 4294967296 - 4294967296)); srcloc: null [2021-11-21 00:48:16,295 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6987: tlan_eisa_probe_~irq~0#1 := 5; [2021-11-21 00:48:16,295 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L7021: assume -2147483648 <= tlan_eisa_probe_#t~ret341#1 && tlan_eisa_probe_#t~ret341#1 <= 2147483647;tlan_eisa_probe_~rc~2#1 := tlan_eisa_probe_#t~ret341#1;havoc tlan_eisa_probe_#t~ret341#1; [2021-11-21 00:48:16,295 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6990: assume 32 == tlan_eisa_probe_~tmp___4~0#1 % 256; [2021-11-21 00:48:16,295 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6990: assume !(32 == tlan_eisa_probe_~tmp___4~0#1 % 256); [2021-11-21 00:48:16,295 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6957-1: tlan_eisa_probe_~device_id~1#1 := tlan_eisa_probe_#t~ret337#1;havoc tlan_eisa_probe_#t~ret337#1; [2021-11-21 00:48:16,296 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6957: SUMMARY for call tlan_eisa_probe_#t~ret337#1 := inw((if (3202 + tlan_eisa_probe_~ioaddr~0#1) % 4294967296 % 4294967296 <= 2147483647 then (3202 + tlan_eisa_probe_~ioaddr~0#1) % 4294967296 % 4294967296 else (3202 + tlan_eisa_probe_~ioaddr~0#1) % 4294967296 % 4294967296 - 4294967296)); srcloc: null [2021-11-21 00:48:16,296 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6991: tlan_eisa_probe_~irq~0#1 := 9; [2021-11-21 00:48:16,296 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6925-1: assume 0 != ~bitwiseAnd(~debug~0, 16);havoc tlan_eisa_probe_#t~nondet334#1; [2021-11-21 00:48:16,296 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6925-1: assume !(0 != ~bitwiseAnd(~debug~0, 16)); [2021-11-21 00:48:16,296 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6959: assume 8433 != tlan_eisa_probe_~device_id~1#1 % 65536 % 4294967296 && 16625 != tlan_eisa_probe_~device_id~1#1 % 65536 % 4294967296; [2021-11-21 00:48:16,296 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6959: assume !(8433 != tlan_eisa_probe_~device_id~1#1 % 65536 % 4294967296 && 16625 != tlan_eisa_probe_~device_id~1#1 % 65536 % 4294967296); [2021-11-21 00:48:16,296 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6927-1: tlan_eisa_probe_~tmp___0~12#1 := tlan_eisa_probe_#t~ret332#1;havoc tlan_eisa_probe_#t~ret332#1;havoc tlan_eisa_probe_#t~nondet333#1; [2021-11-21 00:48:16,297 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6927: SUMMARY for call tlan_eisa_probe_#t~ret332#1 := inw((if (3202 + tlan_eisa_probe_~ioaddr~0#1) % 4294967296 % 4294967296 <= 2147483647 then (3202 + tlan_eisa_probe_~ioaddr~0#1) % 4294967296 % 4294967296 else (3202 + tlan_eisa_probe_~ioaddr~0#1) % 4294967296 % 4294967296 - 4294967296)); srcloc: null [2021-11-21 00:48:16,297 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6994: assume 64 == tlan_eisa_probe_~tmp___4~0#1 % 256; [2021-11-21 00:48:16,297 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6994: assume !(64 == tlan_eisa_probe_~tmp___4~0#1 % 256); [2021-11-21 00:48:16,297 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6961: SUMMARY for call __release_region(~#ioport_resource~0.base, ~#ioport_resource~0.offset, tlan_eisa_probe_~ioaddr~0#1, 16); srcloc: null [2021-11-21 00:48:16,297 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6995: tlan_eisa_probe_~irq~0#1 := 10; [2021-11-21 00:48:16,297 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6998: assume 128 == tlan_eisa_probe_~tmp___4~0#1 % 256; [2021-11-21 00:48:16,297 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6998: assume !(128 == tlan_eisa_probe_~tmp___4~0#1 % 256); [2021-11-21 00:48:16,298 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6932-1: call tlan_eisa_probe_#t~ret335#1.base, tlan_eisa_probe_#t~ret335#1.offset := __request_region(~#ioport_resource~0.base, ~#ioport_resource~0.offset, tlan_eisa_probe_~ioaddr~0#1, 16, ~#tlan_signature~0.base, ~#tlan_signature~0.offset, 0);tlan_eisa_probe_~tmp___1~5#1.base, tlan_eisa_probe_~tmp___1~5#1.offset := tlan_eisa_probe_#t~ret335#1.base, tlan_eisa_probe_#t~ret335#1.offset;havoc tlan_eisa_probe_#t~ret335#1.base, tlan_eisa_probe_#t~ret335#1.offset; [2021-11-21 00:48:16,298 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6999: tlan_eisa_probe_~irq~0#1 := 11; [2021-11-21 00:48:16,298 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6967-1: tlan_eisa_probe_~tmp___3~1#1 := tlan_eisa_probe_#t~ret338#1;havoc tlan_eisa_probe_#t~ret338#1; [2021-11-21 00:48:16,298 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6967: SUMMARY for call tlan_eisa_probe_#t~ret338#1 := inb((if (3204 + tlan_eisa_probe_~ioaddr~0#1) % 4294967296 % 4294967296 <= 2147483647 then (3204 + tlan_eisa_probe_~ioaddr~0#1) % 4294967296 % 4294967296 else (3204 + tlan_eisa_probe_~ioaddr~0#1) % 4294967296 % 4294967296 - 4294967296)); srcloc: null [2021-11-21 00:48:16,298 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L7033-1: tlan_eisa_probe_~ioaddr~0#1 := 4096 + tlan_eisa_probe_~ioaddr~0#1; [2021-11-21 00:48:16,298 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L7002: assume 16 == ~debug~0;havoc tlan_eisa_probe_#t~nondet342#1; [2021-11-21 00:48:16,298 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L7002: assume !(16 == ~debug~0); [2021-11-21 00:48:16,299 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6969: assume 1 != tlan_eisa_probe_~tmp___3~1#1 % 256 % 4294967296; [2021-11-21 00:48:16,299 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6969: assume !(1 != tlan_eisa_probe_~tmp___3~1#1 % 256 % 4294967296); [2021-11-21 00:48:16,299 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6971-1: assume 16 == ~debug~0;havoc tlan_eisa_probe_#t~nondet343#1; [2021-11-21 00:48:16,299 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6971-1: assume !(16 == ~debug~0); [2021-11-21 00:48:16,299 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6971: SUMMARY for call __release_region(~#ioport_resource~0.base, ~#ioport_resource~0.offset, tlan_eisa_probe_~ioaddr~0#1, 16); srcloc: null [2021-11-21 00:48:16,427 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:48:18,175 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:48:18,176 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-21 00:48:18,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:48:18 BoogieIcfgContainer [2021-11-21 00:48:18,184 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:48:18,186 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:48:18,187 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:48:18,191 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:48:18,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:48:05" (1/3) ... [2021-11-21 00:48:18,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f3af08c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:48:18, skipping insertion in model container [2021-11-21 00:48:18,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:48:09" (2/3) ... [2021-11-21 00:48:18,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f3af08c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:48:18, skipping insertion in model container [2021-11-21 00:48:18,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:48:18" (3/3) ... [2021-11-21 00:48:18,195 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i [2021-11-21 00:48:18,208 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:48:18,209 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-21 00:48:18,306 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:48:18,324 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 [2021-11-21 00:48:18,331 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-21 00:48:18,423 INFO L276 IsEmpty]: Start isEmpty. Operand has 1559 states, 847 states have (on average 1.2361275088547816) internal successors, (1047), 903 states have internal predecessors, (1047), 601 states have call successors, (601), 108 states have call predecessors, (601), 107 states have return successors, (597), 579 states have call predecessors, (597), 597 states have call successors, (597) [2021-11-21 00:48:18,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-21 00:48:18,432 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:48:18,433 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, 1, 1, 1] [2021-11-21 00:48:18,433 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)] === [2021-11-21 00:48:18,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:48:18,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1793469295, now seen corresponding path program 1 times [2021-11-21 00:48:18,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:48:18,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143459726] [2021-11-21 00:48:18,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:48:18,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:48:18,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:48:19,379 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 00:48:19,380 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:48:19,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143459726] [2021-11-21 00:48:19,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143459726] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:48:19,382 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:48:19,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:48:19,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885555189] [2021-11-21 00:48:19,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:48:19,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:48:19,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:48:19,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:48:19,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:48:19,432 INFO L87 Difference]: Start difference. First operand has 1559 states, 847 states have (on average 1.2361275088547816) internal successors, (1047), 903 states have internal predecessors, (1047), 601 states have call successors, (601), 108 states have call predecessors, (601), 107 states have return successors, (597), 579 states have call predecessors, (597), 597 states have call successors, (597) Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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) [2021-11-21 00:48:21,905 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:48:25,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:48:25,780 INFO L93 Difference]: Finished difference Result 4146 states and 6158 transitions. [2021-11-21 00:48:25,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:48:25,783 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, (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 38 [2021-11-21 00:48:25,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:48:25,832 INFO L225 Difference]: With dead ends: 4146 [2021-11-21 00:48:25,832 INFO L226 Difference]: Without dead ends: 2596 [2021-11-21 00:48:25,876 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 [2021-11-21 00:48:25,880 INFO L933 BasicCegarLoop]: 2734 mSDtfsCounter, 1816 mSDsluCounter, 7884 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1829 SdHoareTripleChecker+Valid, 9873 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-11-21 00:48:25,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1829 Valid, 9873 Invalid, 1045 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 1043 Invalid, 1 Unknown, 0 Unchecked, 5.8s Time] [2021-11-21 00:48:25,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2596 states. [2021-11-21 00:48:26,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2596 to 2589. [2021-11-21 00:48:26,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2589 states, 1412 states have (on average 1.2223796033994334) internal successors, (1726), 1502 states have internal predecessors, (1726), 984 states have call successors, (984), 191 states have call predecessors, (984), 190 states have return successors, (981), 950 states have call predecessors, (981), 981 states have call successors, (981) [2021-11-21 00:48:26,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2589 states to 2589 states and 3691 transitions. [2021-11-21 00:48:26,297 INFO L78 Accepts]: Start accepts. Automaton has 2589 states and 3691 transitions. Word has length 38 [2021-11-21 00:48:26,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:48:26,298 INFO L470 AbstractCegarLoop]: Abstraction has 2589 states and 3691 transitions. [2021-11-21 00:48:26,299 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, (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) [2021-11-21 00:48:26,299 INFO L276 IsEmpty]: Start isEmpty. Operand 2589 states and 3691 transitions. [2021-11-21 00:48:26,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-21 00:48:26,302 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:48:26,302 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, 1, 1] [2021-11-21 00:48:26,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:48:26,303 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)] === [2021-11-21 00:48:26,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:48:26,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1481465959, now seen corresponding path program 1 times [2021-11-21 00:48:26,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:48:26,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122495271] [2021-11-21 00:48:26,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:48:26,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:48:26,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:48:26,692 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 00:48:26,693 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:48:26,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122495271] [2021-11-21 00:48:26,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122495271] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:48:26,699 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:48:26,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:48:26,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612303104] [2021-11-21 00:48:26,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:48:26,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:48:26,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:48:26,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:48:26,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:48:26,706 INFO L87 Difference]: Start difference. First operand 2589 states and 3691 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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) [2021-11-21 00:48:29,096 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:48:33,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:48:33,704 INFO L93 Difference]: Finished difference Result 2602 states and 3701 transitions. [2021-11-21 00:48:33,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:48:33,705 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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 43 [2021-11-21 00:48:33,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:48:33,738 INFO L225 Difference]: With dead ends: 2602 [2021-11-21 00:48:33,739 INFO L226 Difference]: Without dead ends: 2600 [2021-11-21 00:48:33,742 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 [2021-11-21 00:48:33,745 INFO L933 BasicCegarLoop]: 2724 mSDtfsCounter, 1801 mSDsluCounter, 7853 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1812 SdHoareTripleChecker+Valid, 9832 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2021-11-21 00:48:33,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1812 Valid, 9832 Invalid, 1045 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 1043 Invalid, 1 Unknown, 0 Unchecked, 6.6s Time] [2021-11-21 00:48:33,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2600 states. [2021-11-21 00:48:33,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2600 to 2593. [2021-11-21 00:48:33,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2593 states, 1415 states have (on average 1.2219081272084806) internal successors, (1729), 1505 states have internal predecessors, (1729), 984 states have call successors, (984), 192 states have call predecessors, (984), 191 states have return successors, (981), 950 states have call predecessors, (981), 981 states have call successors, (981) [2021-11-21 00:48:34,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2593 states to 2593 states and 3694 transitions. [2021-11-21 00:48:34,020 INFO L78 Accepts]: Start accepts. Automaton has 2593 states and 3694 transitions. Word has length 43 [2021-11-21 00:48:34,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:48:34,021 INFO L470 AbstractCegarLoop]: Abstraction has 2593 states and 3694 transitions. [2021-11-21 00:48:34,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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) [2021-11-21 00:48:34,022 INFO L276 IsEmpty]: Start isEmpty. Operand 2593 states and 3694 transitions. [2021-11-21 00:48:34,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-21 00:48:34,033 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:48:34,034 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:48:34,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 00:48:34,035 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)] === [2021-11-21 00:48:34,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:48:34,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1004724753, now seen corresponding path program 1 times [2021-11-21 00:48:34,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:48:34,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932287468] [2021-11-21 00:48:34,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:48:34,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:48:34,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:48:34,339 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 00:48:34,339 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:48:34,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932287468] [2021-11-21 00:48:34,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932287468] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:48:34,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:48:34,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:48:34,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835451449] [2021-11-21 00:48:34,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:48:34,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:48:34,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:48:34,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:48:34,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:48:34,354 INFO L87 Difference]: Start difference. First operand 2593 states and 3694 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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) [2021-11-21 00:48:36,754 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:48:40,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:48:40,432 INFO L93 Difference]: Finished difference Result 2606 states and 3704 transitions. [2021-11-21 00:48:40,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:48:40,432 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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 48 [2021-11-21 00:48:40,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:48:40,460 INFO L225 Difference]: With dead ends: 2606 [2021-11-21 00:48:40,460 INFO L226 Difference]: Without dead ends: 2604 [2021-11-21 00:48:40,463 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 [2021-11-21 00:48:40,465 INFO L933 BasicCegarLoop]: 2724 mSDtfsCounter, 1801 mSDsluCounter, 7853 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1811 SdHoareTripleChecker+Valid, 9832 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-11-21 00:48:40,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1811 Valid, 9832 Invalid, 1045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1043 Invalid, 1 Unknown, 0 Unchecked, 5.8s Time] [2021-11-21 00:48:40,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2604 states. [2021-11-21 00:48:40,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2604 to 2597. [2021-11-21 00:48:40,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2597 states, 1418 states have (on average 1.221438645980254) internal successors, (1732), 1508 states have internal predecessors, (1732), 984 states have call successors, (984), 193 states have call predecessors, (984), 192 states have return successors, (981), 950 states have call predecessors, (981), 981 states have call successors, (981) [2021-11-21 00:48:40,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2597 states to 2597 states and 3697 transitions. [2021-11-21 00:48:40,685 INFO L78 Accepts]: Start accepts. Automaton has 2597 states and 3697 transitions. Word has length 48 [2021-11-21 00:48:40,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:48:40,687 INFO L470 AbstractCegarLoop]: Abstraction has 2597 states and 3697 transitions. [2021-11-21 00:48:40,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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) [2021-11-21 00:48:40,687 INFO L276 IsEmpty]: Start isEmpty. Operand 2597 states and 3697 transitions. [2021-11-21 00:48:40,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-21 00:48:40,691 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:48:40,691 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:48:40,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 00:48:40,692 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)] === [2021-11-21 00:48:40,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:48:40,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1510648003, now seen corresponding path program 1 times [2021-11-21 00:48:40,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:48:40,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524320244] [2021-11-21 00:48:40,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:48:40,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:48:40,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:48:41,007 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-21 00:48:41,008 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:48:41,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524320244] [2021-11-21 00:48:41,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524320244] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:48:41,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:48:41,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:48:41,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721273489] [2021-11-21 00:48:41,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:48:41,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:48:41,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:48:41,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:48:41,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:48:41,011 INFO L87 Difference]: Start difference. First operand 2597 states and 3697 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 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) [2021-11-21 00:48:43,396 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:48:46,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:48:46,559 INFO L93 Difference]: Finished difference Result 2610 states and 3707 transitions. [2021-11-21 00:48:46,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:48:46,560 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 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 63 [2021-11-21 00:48:46,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:48:46,587 INFO L225 Difference]: With dead ends: 2610 [2021-11-21 00:48:46,588 INFO L226 Difference]: Without dead ends: 2608 [2021-11-21 00:48:46,591 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 [2021-11-21 00:48:46,592 INFO L933 BasicCegarLoop]: 2724 mSDtfsCounter, 1795 mSDsluCounter, 7853 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1804 SdHoareTripleChecker+Valid, 9832 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:48:46,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1804 Valid, 9832 Invalid, 1045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1043 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2021-11-21 00:48:46,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2608 states. [2021-11-21 00:48:46,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2608 to 2601. [2021-11-21 00:48:46,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2601 states, 1421 states have (on average 1.2209711470795215) internal successors, (1735), 1511 states have internal predecessors, (1735), 984 states have call successors, (984), 194 states have call predecessors, (984), 193 states have return successors, (981), 950 states have call predecessors, (981), 981 states have call successors, (981) [2021-11-21 00:48:46,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2601 states to 2601 states and 3700 transitions. [2021-11-21 00:48:46,836 INFO L78 Accepts]: Start accepts. Automaton has 2601 states and 3700 transitions. Word has length 63 [2021-11-21 00:48:46,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:48:46,837 INFO L470 AbstractCegarLoop]: Abstraction has 2601 states and 3700 transitions. [2021-11-21 00:48:46,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 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) [2021-11-21 00:48:46,837 INFO L276 IsEmpty]: Start isEmpty. Operand 2601 states and 3700 transitions. [2021-11-21 00:48:46,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-21 00:48:46,840 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:48:46,841 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:48:46,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 00:48:46,842 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)] === [2021-11-21 00:48:46,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:48:46,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1809059717, now seen corresponding path program 1 times [2021-11-21 00:48:46,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:48:46,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126907005] [2021-11-21 00:48:46,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:48:46,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:48:46,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:48:47,141 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-21 00:48:47,142 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:48:47,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126907005] [2021-11-21 00:48:47,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126907005] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:48:47,142 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:48:47,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:48:47,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117045238] [2021-11-21 00:48:47,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:48:47,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:48:47,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:48:47,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:48:47,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:48:47,146 INFO L87 Difference]: Start difference. First operand 2601 states and 3700 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 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) [2021-11-21 00:48:49,472 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:48:53,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:48:53,041 INFO L93 Difference]: Finished difference Result 2614 states and 3710 transitions. [2021-11-21 00:48:53,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:48:53,042 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 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 68 [2021-11-21 00:48:53,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:48:53,070 INFO L225 Difference]: With dead ends: 2614 [2021-11-21 00:48:53,070 INFO L226 Difference]: Without dead ends: 2612 [2021-11-21 00:48:53,073 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 [2021-11-21 00:48:53,074 INFO L933 BasicCegarLoop]: 2724 mSDtfsCounter, 1795 mSDsluCounter, 7853 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1803 SdHoareTripleChecker+Valid, 9832 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-11-21 00:48:53,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1803 Valid, 9832 Invalid, 1045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1043 Invalid, 1 Unknown, 0 Unchecked, 5.7s Time] [2021-11-21 00:48:53,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2612 states. [2021-11-21 00:48:53,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2612 to 2605. [2021-11-21 00:48:53,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2605 states, 1424 states have (on average 1.220505617977528) internal successors, (1738), 1514 states have internal predecessors, (1738), 984 states have call successors, (984), 195 states have call predecessors, (984), 194 states have return successors, (981), 950 states have call predecessors, (981), 981 states have call successors, (981) [2021-11-21 00:48:53,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2605 states to 2605 states and 3703 transitions. [2021-11-21 00:48:53,294 INFO L78 Accepts]: Start accepts. Automaton has 2605 states and 3703 transitions. Word has length 68 [2021-11-21 00:48:53,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:48:53,295 INFO L470 AbstractCegarLoop]: Abstraction has 2605 states and 3703 transitions. [2021-11-21 00:48:53,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 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) [2021-11-21 00:48:53,308 INFO L276 IsEmpty]: Start isEmpty. Operand 2605 states and 3703 transitions. [2021-11-21 00:48:53,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-21 00:48:53,310 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:48:53,310 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:48:53,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 00:48:53,311 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)] === [2021-11-21 00:48:53,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:48:53,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1760131651, now seen corresponding path program 1 times [2021-11-21 00:48:53,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:48:53,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310142725] [2021-11-21 00:48:53,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:48:53,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:48:53,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:48:53,546 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-21 00:48:53,546 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:48:53,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310142725] [2021-11-21 00:48:53,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310142725] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:48:53,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:48:53,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:48:53,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489597275] [2021-11-21 00:48:53,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:48:53,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:48:53,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:48:53,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:48:53,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:48:53,550 INFO L87 Difference]: Start difference. First operand 2605 states and 3703 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 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) [2021-11-21 00:48:55,948 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:48:58,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:48:58,656 INFO L93 Difference]: Finished difference Result 2618 states and 3713 transitions. [2021-11-21 00:48:58,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:48:58,656 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 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 73 [2021-11-21 00:48:58,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:48:58,688 INFO L225 Difference]: With dead ends: 2618 [2021-11-21 00:48:58,688 INFO L226 Difference]: Without dead ends: 2616 [2021-11-21 00:48:58,691 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 [2021-11-21 00:48:58,692 INFO L933 BasicCegarLoop]: 2724 mSDtfsCounter, 1795 mSDsluCounter, 7853 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1802 SdHoareTripleChecker+Valid, 9832 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-11-21 00:48:58,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1802 Valid, 9832 Invalid, 1045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1043 Invalid, 1 Unknown, 0 Unchecked, 4.9s Time] [2021-11-21 00:48:58,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2616 states. [2021-11-21 00:48:58,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2616 to 2609. [2021-11-21 00:48:58,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2609 states, 1427 states have (on average 1.2200420462508759) internal successors, (1741), 1517 states have internal predecessors, (1741), 984 states have call successors, (984), 196 states have call predecessors, (984), 195 states have return successors, (981), 950 states have call predecessors, (981), 981 states have call successors, (981) [2021-11-21 00:48:58,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2609 states to 2609 states and 3706 transitions. [2021-11-21 00:48:58,897 INFO L78 Accepts]: Start accepts. Automaton has 2609 states and 3706 transitions. Word has length 73 [2021-11-21 00:48:58,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:48:58,898 INFO L470 AbstractCegarLoop]: Abstraction has 2609 states and 3706 transitions. [2021-11-21 00:48:58,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 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) [2021-11-21 00:48:58,899 INFO L276 IsEmpty]: Start isEmpty. Operand 2609 states and 3706 transitions. [2021-11-21 00:48:58,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-21 00:48:58,901 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:48:58,901 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, 1, 1, 1] [2021-11-21 00:48:58,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 00:48:58,902 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)] === [2021-11-21 00:48:58,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:48:58,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1292725521, now seen corresponding path program 1 times [2021-11-21 00:48:58,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:48:58,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073646602] [2021-11-21 00:48:58,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:48:58,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:48:58,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:48:59,096 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-21 00:48:59,096 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:48:59,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073646602] [2021-11-21 00:48:59,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073646602] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:48:59,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:48:59,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:48:59,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275944938] [2021-11-21 00:48:59,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:48:59,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:48:59,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:48:59,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:48:59,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:48:59,099 INFO L87 Difference]: Start difference. First operand 2609 states and 3706 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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) [2021-11-21 00:49:01,443 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:49:06,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:49:06,221 INFO L93 Difference]: Finished difference Result 4783 states and 7079 transitions. [2021-11-21 00:49:06,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:49:06,222 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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 68 [2021-11-21 00:49:06,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:49:06,282 INFO L225 Difference]: With dead ends: 4783 [2021-11-21 00:49:06,283 INFO L226 Difference]: Without dead ends: 4781 [2021-11-21 00:49:06,288 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 [2021-11-21 00:49:06,289 INFO L933 BasicCegarLoop]: 3099 mSDtfsCounter, 1894 mSDsluCounter, 9109 mSDsCounter, 0 mSdLazyCounter, 1247 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1899 SdHoareTripleChecker+Valid, 11316 SdHoareTripleChecker+Invalid, 1251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1247 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2021-11-21 00:49:06,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1899 Valid, 11316 Invalid, 1251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1247 Invalid, 1 Unknown, 0 Unchecked, 6.8s Time] [2021-11-21 00:49:06,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4781 states. [2021-11-21 00:49:06,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4781 to 4768. [2021-11-21 00:49:06,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4768 states, 2603 states have (on average 1.215904725316942) internal successors, (3165), 2779 states have internal predecessors, (3165), 1787 states have call successors, (1787), 387 states have call predecessors, (1787), 375 states have return successors, (2115), 1692 states have call predecessors, (2115), 1781 states have call successors, (2115) [2021-11-21 00:49:06,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4768 states to 4768 states and 7067 transitions. [2021-11-21 00:49:06,709 INFO L78 Accepts]: Start accepts. Automaton has 4768 states and 7067 transitions. Word has length 68 [2021-11-21 00:49:06,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:49:06,710 INFO L470 AbstractCegarLoop]: Abstraction has 4768 states and 7067 transitions. [2021-11-21 00:49:06,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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) [2021-11-21 00:49:06,711 INFO L276 IsEmpty]: Start isEmpty. Operand 4768 states and 7067 transitions. [2021-11-21 00:49:06,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-21 00:49:06,715 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:49:06,715 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:49:06,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 00:49:06,715 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)] === [2021-11-21 00:49:06,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:49:06,717 INFO L85 PathProgramCache]: Analyzing trace with hash -2014147, now seen corresponding path program 1 times [2021-11-21 00:49:06,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:49:06,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140393195] [2021-11-21 00:49:06,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:49:06,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:49:06,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:49:06,914 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-21 00:49:06,914 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:49:06,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140393195] [2021-11-21 00:49:06,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140393195] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:49:06,915 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:49:06,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:49:06,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231133186] [2021-11-21 00:49:06,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:49:06,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:49:06,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:49:06,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:49:06,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:49:06,918 INFO L87 Difference]: Start difference. First operand 4768 states and 7067 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 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) [2021-11-21 00:49:09,278 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:49:12,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:49:12,339 INFO L93 Difference]: Finished difference Result 4788 states and 7084 transitions. [2021-11-21 00:49:12,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:49:12,340 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 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 83 [2021-11-21 00:49:12,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:49:12,388 INFO L225 Difference]: With dead ends: 4788 [2021-11-21 00:49:12,388 INFO L226 Difference]: Without dead ends: 4786 [2021-11-21 00:49:12,392 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 [2021-11-21 00:49:12,393 INFO L933 BasicCegarLoop]: 2524 mSDtfsCounter, 1795 mSDsluCounter, 7411 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1800 SdHoareTripleChecker+Valid, 9232 SdHoareTripleChecker+Invalid, 982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:49:12,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1800 Valid, 9232 Invalid, 982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 980 Invalid, 1 Unknown, 0 Unchecked, 5.0s Time] [2021-11-21 00:49:12,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4786 states. [2021-11-21 00:49:12,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4786 to 4782. [2021-11-21 00:49:12,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4782 states, 2613 states have (on average 1.215078453884424) internal successors, (3175), 2791 states have internal predecessors, (3175), 1787 states have call successors, (1787), 389 states have call predecessors, (1787), 379 states have return successors, (2117), 1694 states have call predecessors, (2117), 1781 states have call successors, (2117) [2021-11-21 00:49:12,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4782 states to 4782 states and 7079 transitions. [2021-11-21 00:49:12,795 INFO L78 Accepts]: Start accepts. Automaton has 4782 states and 7079 transitions. Word has length 83 [2021-11-21 00:49:12,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:49:12,797 INFO L470 AbstractCegarLoop]: Abstraction has 4782 states and 7079 transitions. [2021-11-21 00:49:12,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 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) [2021-11-21 00:49:12,798 INFO L276 IsEmpty]: Start isEmpty. Operand 4782 states and 7079 transitions. [2021-11-21 00:49:12,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-21 00:49:12,807 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:49:12,807 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:49:12,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 00:49:12,808 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)] === [2021-11-21 00:49:12,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:49:12,809 INFO L85 PathProgramCache]: Analyzing trace with hash 572555899, now seen corresponding path program 1 times [2021-11-21 00:49:12,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:49:12,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135122606] [2021-11-21 00:49:12,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:49:12,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:49:12,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:49:13,061 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2021-11-21 00:49:13,062 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:49:13,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135122606] [2021-11-21 00:49:13,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135122606] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:49:13,062 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:49:13,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:49:13,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306080998] [2021-11-21 00:49:13,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:49:13,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:49:13,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:49:13,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:49:13,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:49:13,065 INFO L87 Difference]: Start difference. First operand 4782 states and 7079 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 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) [2021-11-21 00:49:15,427 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:49:19,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:49:19,507 INFO L93 Difference]: Finished difference Result 4796 states and 7090 transitions. [2021-11-21 00:49:19,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:49:19,508 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 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 88 [2021-11-21 00:49:19,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:49:19,553 INFO L225 Difference]: With dead ends: 4796 [2021-11-21 00:49:19,554 INFO L226 Difference]: Without dead ends: 4794 [2021-11-21 00:49:19,558 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 [2021-11-21 00:49:19,559 INFO L933 BasicCegarLoop]: 2524 mSDtfsCounter, 1795 mSDsluCounter, 7411 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1799 SdHoareTripleChecker+Valid, 9232 SdHoareTripleChecker+Invalid, 982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:49:19,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1799 Valid, 9232 Invalid, 982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 980 Invalid, 1 Unknown, 0 Unchecked, 6.1s Time] [2021-11-21 00:49:19,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4794 states. [2021-11-21 00:49:19,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4794 to 4790. [2021-11-21 00:49:19,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4790 states, 2619 states have (on average 1.214585719740359) internal successors, (3181), 2797 states have internal predecessors, (3181), 1787 states have call successors, (1787), 391 states have call predecessors, (1787), 381 states have return successors, (2117), 1694 states have call predecessors, (2117), 1781 states have call successors, (2117) [2021-11-21 00:49:20,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4790 states to 4790 states and 7085 transitions. [2021-11-21 00:49:20,034 INFO L78 Accepts]: Start accepts. Automaton has 4790 states and 7085 transitions. Word has length 88 [2021-11-21 00:49:20,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:49:20,035 INFO L470 AbstractCegarLoop]: Abstraction has 4790 states and 7085 transitions. [2021-11-21 00:49:20,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 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) [2021-11-21 00:49:20,036 INFO L276 IsEmpty]: Start isEmpty. Operand 4790 states and 7085 transitions. [2021-11-21 00:49:20,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-21 00:49:20,038 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:49:20,038 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:49:20,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-21 00:49:20,039 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)] === [2021-11-21 00:49:20,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:49:20,039 INFO L85 PathProgramCache]: Analyzing trace with hash -979266883, now seen corresponding path program 1 times [2021-11-21 00:49:20,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:49:20,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53164813] [2021-11-21 00:49:20,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:49:20,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:49:20,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:49:20,245 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-11-21 00:49:20,246 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:49:20,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53164813] [2021-11-21 00:49:20,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53164813] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:49:20,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:49:20,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:49:20,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732268454] [2021-11-21 00:49:20,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:49:20,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:49:20,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:49:20,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:49:20,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:49:20,249 INFO L87 Difference]: Start difference. First operand 4790 states and 7085 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 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) [2021-11-21 00:49:22,671 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:49:25,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:49:25,220 INFO L93 Difference]: Finished difference Result 4804 states and 7096 transitions. [2021-11-21 00:49:25,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:49:25,220 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 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 93 [2021-11-21 00:49:25,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:49:25,256 INFO L225 Difference]: With dead ends: 4804 [2021-11-21 00:49:25,256 INFO L226 Difference]: Without dead ends: 4802 [2021-11-21 00:49:25,261 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 [2021-11-21 00:49:25,262 INFO L933 BasicCegarLoop]: 2524 mSDtfsCounter, 1795 mSDsluCounter, 7411 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1798 SdHoareTripleChecker+Valid, 9232 SdHoareTripleChecker+Invalid, 982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-21 00:49:25,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1798 Valid, 9232 Invalid, 982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 980 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2021-11-21 00:49:25,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4802 states. [2021-11-21 00:49:25,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4802 to 4798. [2021-11-21 00:49:25,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4798 states, 2625 states have (on average 1.2140952380952381) internal successors, (3187), 2803 states have internal predecessors, (3187), 1787 states have call successors, (1787), 393 states have call predecessors, (1787), 383 states have return successors, (2117), 1694 states have call predecessors, (2117), 1781 states have call successors, (2117) [2021-11-21 00:49:25,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4798 states to 4798 states and 7091 transitions. [2021-11-21 00:49:25,805 INFO L78 Accepts]: Start accepts. Automaton has 4798 states and 7091 transitions. Word has length 93 [2021-11-21 00:49:25,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:49:25,806 INFO L470 AbstractCegarLoop]: Abstraction has 4798 states and 7091 transitions. [2021-11-21 00:49:25,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 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) [2021-11-21 00:49:25,806 INFO L276 IsEmpty]: Start isEmpty. Operand 4798 states and 7091 transitions. [2021-11-21 00:49:25,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-21 00:49:25,810 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:49:25,811 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, 1, 1] [2021-11-21 00:49:25,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-21 00:49:25,811 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)] === [2021-11-21 00:49:25,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:49:25,812 INFO L85 PathProgramCache]: Analyzing trace with hash -7129071, now seen corresponding path program 1 times [2021-11-21 00:49:25,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:49:25,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998232758] [2021-11-21 00:49:25,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:49:25,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:49:25,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:49:26,017 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2021-11-21 00:49:26,018 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:49:26,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998232758] [2021-11-21 00:49:26,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998232758] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:49:26,019 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:49:26,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:49:26,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741861940] [2021-11-21 00:49:26,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:49:26,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:49:26,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:49:26,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:49:26,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:49:26,021 INFO L87 Difference]: Start difference. First operand 4798 states and 7091 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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) [2021-11-21 00:49:28,375 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:49:30,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:49:30,824 INFO L93 Difference]: Finished difference Result 4812 states and 7102 transitions. [2021-11-21 00:49:30,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:49:30,830 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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 88 [2021-11-21 00:49:30,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:49:30,862 INFO L225 Difference]: With dead ends: 4812 [2021-11-21 00:49:30,863 INFO L226 Difference]: Without dead ends: 4808 [2021-11-21 00:49:30,867 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 [2021-11-21 00:49:30,868 INFO L933 BasicCegarLoop]: 2525 mSDtfsCounter, 1801 mSDsluCounter, 7413 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1803 SdHoareTripleChecker+Valid, 9235 SdHoareTripleChecker+Invalid, 982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:49:30,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1803 Valid, 9235 Invalid, 982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 980 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2021-11-21 00:49:30,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4808 states. [2021-11-21 00:49:31,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4808 to 4804. [2021-11-21 00:49:31,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4804 states, 2630 states have (on average 1.2133079847908745) internal successors, (3191), 2807 states have internal predecessors, (3191), 1787 states have call successors, (1787), 395 states have call predecessors, (1787), 384 states have return successors, (2117), 1694 states have call predecessors, (2117), 1781 states have call successors, (2117) [2021-11-21 00:49:31,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4804 states to 4804 states and 7095 transitions. [2021-11-21 00:49:31,271 INFO L78 Accepts]: Start accepts. Automaton has 4804 states and 7095 transitions. Word has length 88 [2021-11-21 00:49:31,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:49:31,273 INFO L470 AbstractCegarLoop]: Abstraction has 4804 states and 7095 transitions. [2021-11-21 00:49:31,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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) [2021-11-21 00:49:31,273 INFO L276 IsEmpty]: Start isEmpty. Operand 4804 states and 7095 transitions. [2021-11-21 00:49:31,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-21 00:49:31,278 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:49:31,278 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, 1, 1] [2021-11-21 00:49:31,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-21 00:49:31,279 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)] === [2021-11-21 00:49:31,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:49:31,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1556683367, now seen corresponding path program 1 times [2021-11-21 00:49:31,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:49:31,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682898669] [2021-11-21 00:49:31,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:49:31,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:49:31,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:49:31,483 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-21 00:49:31,483 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:49:31,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682898669] [2021-11-21 00:49:31,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682898669] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:49:31,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:49:31,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:49:31,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823806540] [2021-11-21 00:49:31,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:49:31,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:49:31,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:49:31,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:49:31,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:49:31,486 INFO L87 Difference]: Start difference. First operand 4804 states and 7095 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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) [2021-11-21 00:49:33,830 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:49:36,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:49:36,946 INFO L93 Difference]: Finished difference Result 4814 states and 7102 transitions. [2021-11-21 00:49:36,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:49:36,946 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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 93 [2021-11-21 00:49:36,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:49:36,977 INFO L225 Difference]: With dead ends: 4814 [2021-11-21 00:49:36,977 INFO L226 Difference]: Without dead ends: 4723 [2021-11-21 00:49:36,982 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 [2021-11-21 00:49:36,983 INFO L933 BasicCegarLoop]: 2526 mSDtfsCounter, 1801 mSDsluCounter, 7415 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1802 SdHoareTripleChecker+Valid, 9238 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:49:36,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1802 Valid, 9238 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 977 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2021-11-21 00:49:36,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4723 states. [2021-11-21 00:49:37,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4723 to 4719. [2021-11-21 00:49:37,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4719 states, 2581 states have (on average 1.2158078264238668) internal successors, (3138), 2756 states have internal predecessors, (3138), 1767 states have call successors, (1767), 378 states have call predecessors, (1767), 368 states have return successors, (2100), 1677 states have call predecessors, (2100), 1764 states have call successors, (2100) [2021-11-21 00:49:37,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4719 states to 4719 states and 7005 transitions. [2021-11-21 00:49:37,416 INFO L78 Accepts]: Start accepts. Automaton has 4719 states and 7005 transitions. Word has length 93 [2021-11-21 00:49:37,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:49:37,417 INFO L470 AbstractCegarLoop]: Abstraction has 4719 states and 7005 transitions. [2021-11-21 00:49:37,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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) [2021-11-21 00:49:37,417 INFO L276 IsEmpty]: Start isEmpty. Operand 4719 states and 7005 transitions. [2021-11-21 00:49:37,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-21 00:49:37,420 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:49:37,420 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 4, 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] [2021-11-21 00:49:37,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-21 00:49:37,421 INFO L402 AbstractCegarLoop]: === Iteration 13 === 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)] === [2021-11-21 00:49:37,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:49:37,421 INFO L85 PathProgramCache]: Analyzing trace with hash -397249481, now seen corresponding path program 1 times [2021-11-21 00:49:37,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:49:37,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373291195] [2021-11-21 00:49:37,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:49:37,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:49:37,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:49:37,765 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-21 00:49:37,765 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:49:37,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373291195] [2021-11-21 00:49:37,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373291195] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:49:37,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:49:37,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 00:49:37,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785989955] [2021-11-21 00:49:37,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:49:37,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:49:37,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:49:37,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:49:37,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:49:37,768 INFO L87 Difference]: Start difference. First operand 4719 states and 7005 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-21 00:49:40,541 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:49:53,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:49:53,009 INFO L93 Difference]: Finished difference Result 5888 states and 9289 transitions. [2021-11-21 00:49:53,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 00:49:53,010 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 117 [2021-11-21 00:49:53,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:49:53,083 INFO L225 Difference]: With dead ends: 5888 [2021-11-21 00:49:53,083 INFO L226 Difference]: Without dead ends: 5886 [2021-11-21 00:49:53,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-11-21 00:49:53,094 INFO L933 BasicCegarLoop]: 2557 mSDtfsCounter, 2450 mSDsluCounter, 6978 mSDsCounter, 0 mSdLazyCounter, 6968 mSolverCounterSat, 2210 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2866 SdHoareTripleChecker+Valid, 8705 SdHoareTripleChecker+Invalid, 9179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2210 IncrementalHoareTripleChecker+Valid, 6968 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.6s IncrementalHoareTripleChecker+Time [2021-11-21 00:49:53,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2866 Valid, 8705 Invalid, 9179 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2210 Valid, 6968 Invalid, 1 Unknown, 0 Unchecked, 14.6s Time] [2021-11-21 00:49:53,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5886 states. [2021-11-21 00:49:53,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5886 to 5871. [2021-11-21 00:49:53,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5871 states, 3227 states have (on average 1.2147505422993492) internal successors, (3920), 3442 states have internal predecessors, (3920), 2171 states have call successors, (2171), 378 states have call predecessors, (2171), 470 states have return successors, (3173), 2161 states have call predecessors, (3173), 2168 states have call successors, (3173) [2021-11-21 00:49:53,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5871 states to 5871 states and 9264 transitions. [2021-11-21 00:49:53,802 INFO L78 Accepts]: Start accepts. Automaton has 5871 states and 9264 transitions. Word has length 117 [2021-11-21 00:49:53,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:49:53,803 INFO L470 AbstractCegarLoop]: Abstraction has 5871 states and 9264 transitions. [2021-11-21 00:49:53,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-21 00:49:53,804 INFO L276 IsEmpty]: Start isEmpty. Operand 5871 states and 9264 transitions. [2021-11-21 00:49:53,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-21 00:49:53,807 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:49:53,808 INFO L514 BasicCegarLoop]: trace histogram [7, 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] [2021-11-21 00:49:53,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-21 00:49:53,808 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)] === [2021-11-21 00:49:53,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:49:53,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1685581393, now seen corresponding path program 1 times [2021-11-21 00:49:53,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:49:53,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730239044] [2021-11-21 00:49:53,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:49:53,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:49:53,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:49:54,173 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-21 00:49:54,175 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:49:54,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730239044] [2021-11-21 00:49:54,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730239044] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:49:54,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:49:54,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:49:54,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429833655] [2021-11-21 00:49:54,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:49:54,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:49:54,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:49:54,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:49:54,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:49:54,178 INFO L87 Difference]: Start difference. First operand 5871 states and 9264 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-21 00:49:56,508 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:50:00,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:50:00,042 INFO L93 Difference]: Finished difference Result 7985 states and 12527 transitions. [2021-11-21 00:50:00,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:50:00,042 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 123 [2021-11-21 00:50:00,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:50:00,178 INFO L225 Difference]: With dead ends: 7985 [2021-11-21 00:50:00,178 INFO L226 Difference]: Without dead ends: 7983 [2021-11-21 00:50:00,183 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 [2021-11-21 00:50:00,184 INFO L933 BasicCegarLoop]: 2759 mSDtfsCounter, 1878 mSDsluCounter, 8304 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1879 SdHoareTripleChecker+Valid, 10303 SdHoareTripleChecker+Invalid, 1040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:50:00,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1879 Valid, 10303 Invalid, 1040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1037 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2021-11-21 00:50:00,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7983 states. [2021-11-21 00:50:00,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7983 to 7936. [2021-11-21 00:50:00,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7936 states, 4350 states have (on average 1.2135632183908045) internal successors, (5279), 4646 states have internal predecessors, (5279), 2944 states have call successors, (2944), 556 states have call predecessors, (2944), 639 states have return successors, (4256), 2879 states have call predecessors, (4256), 2941 states have call successors, (4256) [2021-11-21 00:50:00,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7936 states to 7936 states and 12479 transitions. [2021-11-21 00:50:00,989 INFO L78 Accepts]: Start accepts. Automaton has 7936 states and 12479 transitions. Word has length 123 [2021-11-21 00:50:00,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:50:00,990 INFO L470 AbstractCegarLoop]: Abstraction has 7936 states and 12479 transitions. [2021-11-21 00:50:00,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-21 00:50:00,991 INFO L276 IsEmpty]: Start isEmpty. Operand 7936 states and 12479 transitions. [2021-11-21 00:50:00,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-21 00:50:00,996 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:50:00,996 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 4, 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] [2021-11-21 00:50:00,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-21 00:50:00,997 INFO L402 AbstractCegarLoop]: === Iteration 15 === 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)] === [2021-11-21 00:50:00,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:50:00,997 INFO L85 PathProgramCache]: Analyzing trace with hash 194585408, now seen corresponding path program 1 times [2021-11-21 00:50:00,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:50:00,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179432372] [2021-11-21 00:50:00,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:50:00,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:50:01,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:50:01,232 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-11-21 00:50:01,233 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:50:01,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179432372] [2021-11-21 00:50:01,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179432372] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:50:01,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:50:01,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:50:01,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266833043] [2021-11-21 00:50:01,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:50:01,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:50:01,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:50:01,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:50:01,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:50:01,236 INFO L87 Difference]: Start difference. First operand 7936 states and 12479 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-21 00:50:03,605 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:50:08,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:50:08,465 INFO L93 Difference]: Finished difference Result 9997 states and 15654 transitions. [2021-11-21 00:50:08,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:50:08,466 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 136 [2021-11-21 00:50:08,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:50:08,571 INFO L225 Difference]: With dead ends: 9997 [2021-11-21 00:50:08,571 INFO L226 Difference]: Without dead ends: 9995 [2021-11-21 00:50:08,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:50:08,592 INFO L933 BasicCegarLoop]: 3389 mSDtfsCounter, 2214 mSDsluCounter, 9485 mSDsCounter, 0 mSdLazyCounter, 1404 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2215 SdHoareTripleChecker+Valid, 11878 SdHoareTripleChecker+Invalid, 1406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1404 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2021-11-21 00:50:08,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2215 Valid, 11878 Invalid, 1406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1404 Invalid, 1 Unknown, 0 Unchecked, 6.6s Time] [2021-11-21 00:50:08,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9995 states. [2021-11-21 00:50:09,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9995 to 9948. [2021-11-21 00:50:09,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9948 states, 5443 states have (on average 1.2125665993018555) internal successors, (6600), 5818 states have internal predecessors, (6600), 3695 states have call successors, (3695), 733 states have call predecessors, (3695), 807 states have return successors, (5311), 3576 states have call predecessors, (5311), 3692 states have call successors, (5311) [2021-11-21 00:50:09,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9948 states to 9948 states and 15606 transitions. [2021-11-21 00:50:09,849 INFO L78 Accepts]: Start accepts. Automaton has 9948 states and 15606 transitions. Word has length 136 [2021-11-21 00:50:09,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:50:09,850 INFO L470 AbstractCegarLoop]: Abstraction has 9948 states and 15606 transitions. [2021-11-21 00:50:09,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-21 00:50:09,851 INFO L276 IsEmpty]: Start isEmpty. Operand 9948 states and 15606 transitions. [2021-11-21 00:50:09,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-11-21 00:50:09,860 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:50:09,860 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:50:09,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-21 00:50:09,861 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 00:50:09,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:50:09,861 INFO L85 PathProgramCache]: Analyzing trace with hash -2010593181, now seen corresponding path program 1 times [2021-11-21 00:50:09,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:50:09,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478310533] [2021-11-21 00:50:09,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:50:09,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:50:10,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:50:10,150 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-11-21 00:50:10,150 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:50:10,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478310533] [2021-11-21 00:50:10,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478310533] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:50:10,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:50:10,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:50:10,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491853200] [2021-11-21 00:50:10,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:50:10,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:50:10,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:50:10,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:50:10,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:50:10,156 INFO L87 Difference]: Start difference. First operand 9948 states and 15606 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-21 00:50:12,560 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:50:16,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:50:16,071 INFO L93 Difference]: Finished difference Result 19902 states and 31279 transitions. [2021-11-21 00:50:16,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:50:16,072 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 175 [2021-11-21 00:50:16,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:50:16,379 INFO L225 Difference]: With dead ends: 19902 [2021-11-21 00:50:16,380 INFO L226 Difference]: Without dead ends: 9970 [2021-11-21 00:50:16,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:50:16,563 INFO L933 BasicCegarLoop]: 1988 mSDtfsCounter, 8 mSDsluCounter, 4439 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 5953 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:50:16,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 5953 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 722 Invalid, 1 Unknown, 0 Unchecked, 5.0s Time] [2021-11-21 00:50:16,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9970 states. [2021-11-21 00:50:17,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9970 to 9952. [2021-11-21 00:50:17,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9952 states, 5447 states have (on average 1.2124105011933175) internal successors, (6604), 5822 states have internal predecessors, (6604), 3695 states have call successors, (3695), 733 states have call predecessors, (3695), 807 states have return successors, (5311), 3576 states have call predecessors, (5311), 3692 states have call successors, (5311) [2021-11-21 00:50:17,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9952 states to 9952 states and 15610 transitions. [2021-11-21 00:50:17,921 INFO L78 Accepts]: Start accepts. Automaton has 9952 states and 15610 transitions. Word has length 175 [2021-11-21 00:50:17,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:50:17,924 INFO L470 AbstractCegarLoop]: Abstraction has 9952 states and 15610 transitions. [2021-11-21 00:50:17,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-21 00:50:17,924 INFO L276 IsEmpty]: Start isEmpty. Operand 9952 states and 15610 transitions. [2021-11-21 00:50:17,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-21 00:50:17,934 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:50:17,935 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:50:17,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-21 00:50:17,935 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)] === [2021-11-21 00:50:17,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:50:17,936 INFO L85 PathProgramCache]: Analyzing trace with hash -2036884641, now seen corresponding path program 1 times [2021-11-21 00:50:17,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:50:17,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545956189] [2021-11-21 00:50:17,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:50:17,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:50:18,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:50:18,862 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-21 00:50:18,862 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:50:18,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545956189] [2021-11-21 00:50:18,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545956189] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:50:18,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742464795] [2021-11-21 00:50:18,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:50:18,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:50:18,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d53e27-430a-4b50-a5ae-51496efefd3e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:50:18,867 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d53e27-430a-4b50-a5ae-51496efefd3e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:50:18,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d53e27-430a-4b50-a5ae-51496efefd3e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:50:20,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:50:20,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 2692 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-21 00:50:20,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:50:21,045 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-11-21 00:50:21,046 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:50:21,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742464795] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:50:21,046 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:50:21,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [9] total 16 [2021-11-21 00:50:21,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839994393] [2021-11-21 00:50:21,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:50:21,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-21 00:50:21,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:50:21,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-21 00:50:21,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2021-11-21 00:50:21,049 INFO L87 Difference]: Start difference. First operand 9952 states and 15610 transitions. Second operand has 11 states, 8 states have (on average 9.5) internal successors, (76), 9 states have internal predecessors, (76), 5 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (31), 6 states have call predecessors, (31), 5 states have call successors, (31) [2021-11-21 00:50:24,014 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:50:31,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:50:31,613 INFO L93 Difference]: Finished difference Result 20300 states and 31873 transitions. [2021-11-21 00:50:31,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-21 00:50:31,613 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 9.5) internal successors, (76), 9 states have internal predecessors, (76), 5 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (31), 6 states have call predecessors, (31), 5 states have call successors, (31) Word has length 186 [2021-11-21 00:50:31,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:50:31,719 INFO L225 Difference]: With dead ends: 20300 [2021-11-21 00:50:31,719 INFO L226 Difference]: Without dead ends: 10360 [2021-11-21 00:50:31,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-11-21 00:50:31,853 INFO L933 BasicCegarLoop]: 2057 mSDtfsCounter, 76 mSDsluCounter, 20525 mSDsCounter, 0 mSdLazyCounter, 2943 mSolverCounterSat, 51 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 20371 SdHoareTripleChecker+Invalid, 2995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 2943 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:50:31,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 20371 Invalid, 2995 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [51 Valid, 2943 Invalid, 1 Unknown, 0 Unchecked, 9.5s Time] [2021-11-21 00:50:31,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10360 states. [2021-11-21 00:50:32,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10360 to 9984. [2021-11-21 00:50:33,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9984 states, 5467 states have (on average 1.2116334369855497) internal successors, (6624), 5842 states have internal predecessors, (6624), 3703 states have call successors, (3703), 733 states have call predecessors, (3703), 811 states have return successors, (5323), 3588 states have call predecessors, (5323), 3700 states have call successors, (5323) [2021-11-21 00:50:33,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9984 states to 9984 states and 15650 transitions. [2021-11-21 00:50:33,175 INFO L78 Accepts]: Start accepts. Automaton has 9984 states and 15650 transitions. Word has length 186 [2021-11-21 00:50:33,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:50:33,176 INFO L470 AbstractCegarLoop]: Abstraction has 9984 states and 15650 transitions. [2021-11-21 00:50:33,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 9.5) internal successors, (76), 9 states have internal predecessors, (76), 5 states have call successors, (36), 2 states have call predecessors, (36), 5 states have return successors, (31), 6 states have call predecessors, (31), 5 states have call successors, (31) [2021-11-21 00:50:33,176 INFO L276 IsEmpty]: Start isEmpty. Operand 9984 states and 15650 transitions. [2021-11-21 00:50:33,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-21 00:50:33,186 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:50:33,186 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:50:33,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d53e27-430a-4b50-a5ae-51496efefd3e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:50:33,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d53e27-430a-4b50-a5ae-51496efefd3e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-21 00:50:33,402 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)] === [2021-11-21 00:50:33,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:50:33,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1879430989, now seen corresponding path program 1 times [2021-11-21 00:50:33,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:50:33,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983574147] [2021-11-21 00:50:33,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:50:33,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:50:33,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:50:33,739 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2021-11-21 00:50:33,739 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:50:33,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983574147] [2021-11-21 00:50:33,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983574147] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:50:33,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:50:33,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:50:33,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933093761] [2021-11-21 00:50:33,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:50:33,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:50:33,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:50:33,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:50:33,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:50:33,743 INFO L87 Difference]: Start difference. First operand 9984 states and 15650 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-21 00:50:36,049 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:50:38,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:50:38,890 INFO L93 Difference]: Finished difference Result 20042 states and 31429 transitions. [2021-11-21 00:50:38,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:50:38,891 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 189 [2021-11-21 00:50:38,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:50:38,982 INFO L225 Difference]: With dead ends: 20042 [2021-11-21 00:50:38,982 INFO L226 Difference]: Without dead ends: 10074 [2021-11-21 00:50:39,123 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 [2021-11-21 00:50:39,124 INFO L933 BasicCegarLoop]: 1994 mSDtfsCounter, 27 mSDsluCounter, 2192 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 3957 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:50:39,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 3957 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 480 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2021-11-21 00:50:39,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10074 states. [2021-11-21 00:50:40,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10074 to 10048. [2021-11-21 00:50:40,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10048 states, 5515 states have (on average 1.2112420670897552) internal successors, (6680), 5886 states have internal predecessors, (6680), 3719 states have call successors, (3719), 733 states have call predecessors, (3719), 811 states have return successors, (5339), 3604 states have call predecessors, (5339), 3716 states have call successors, (5339) [2021-11-21 00:50:40,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10048 states to 10048 states and 15738 transitions. [2021-11-21 00:50:40,285 INFO L78 Accepts]: Start accepts. Automaton has 10048 states and 15738 transitions. Word has length 189 [2021-11-21 00:50:40,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:50:40,286 INFO L470 AbstractCegarLoop]: Abstraction has 10048 states and 15738 transitions. [2021-11-21 00:50:40,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-21 00:50:40,286 INFO L276 IsEmpty]: Start isEmpty. Operand 10048 states and 15738 transitions. [2021-11-21 00:50:40,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-21 00:50:40,300 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:50:40,301 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:50:40,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-21 00:50:40,301 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)] === [2021-11-21 00:50:40,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:50:40,302 INFO L85 PathProgramCache]: Analyzing trace with hash -938278624, now seen corresponding path program 1 times [2021-11-21 00:50:40,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:50:40,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259972464] [2021-11-21 00:50:40,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:50:40,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:50:40,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:50:41,069 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-21 00:50:41,070 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:50:41,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259972464] [2021-11-21 00:50:41,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259972464] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:50:41,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65267124] [2021-11-21 00:50:41,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:50:41,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:50:41,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d53e27-430a-4b50-a5ae-51496efefd3e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:50:41,072 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d53e27-430a-4b50-a5ae-51496efefd3e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:50:41,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d53e27-430a-4b50-a5ae-51496efefd3e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:50:42,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:50:42,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 2728 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-21 00:50:42,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:50:43,082 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-11-21 00:50:43,082 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:50:43,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65267124] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:50:43,083 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:50:43,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [9] total 17 [2021-11-21 00:50:43,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878698541] [2021-11-21 00:50:43,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:50:43,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-21 00:50:43,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:50:43,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-21 00:50:43,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2021-11-21 00:50:43,086 INFO L87 Difference]: Start difference. First operand 10048 states and 15738 transitions. Second operand has 12 states, 9 states have (on average 8.88888888888889) internal successors, (80), 10 states have internal predecessors, (80), 6 states have call successors, (37), 2 states have call predecessors, (37), 5 states have return successors, (32), 7 states have call predecessors, (32), 6 states have call successors, (32) [2021-11-21 00:50:45,918 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:50:53,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:50:53,355 INFO L93 Difference]: Finished difference Result 20502 states and 32171 transitions. [2021-11-21 00:50:53,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-21 00:50:53,356 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 8.88888888888889) internal successors, (80), 10 states have internal predecessors, (80), 6 states have call successors, (37), 2 states have call predecessors, (37), 5 states have return successors, (32), 7 states have call predecessors, (32), 6 states have call successors, (32) Word has length 192 [2021-11-21 00:50:53,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:50:53,478 INFO L225 Difference]: With dead ends: 20502 [2021-11-21 00:50:53,478 INFO L226 Difference]: Without dead ends: 10466 [2021-11-21 00:50:53,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-11-21 00:50:53,638 INFO L933 BasicCegarLoop]: 2070 mSDtfsCounter, 97 mSDsluCounter, 22939 mSDsCounter, 0 mSdLazyCounter, 3265 mSolverCounterSat, 59 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 22539 SdHoareTripleChecker+Invalid, 3325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 3265 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:50:53,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 22539 Invalid, 3325 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [59 Valid, 3265 Invalid, 1 Unknown, 0 Unchecked, 9.3s Time] [2021-11-21 00:50:53,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10466 states. [2021-11-21 00:50:54,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10466 to 10048. [2021-11-21 00:50:54,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10048 states, 5515 states have (on average 1.2112420670897552) internal successors, (6680), 5886 states have internal predecessors, (6680), 3719 states have call successors, (3719), 733 states have call predecessors, (3719), 811 states have return successors, (5347), 3604 states have call predecessors, (5347), 3716 states have call successors, (5347) [2021-11-21 00:50:54,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10048 states to 10048 states and 15746 transitions. [2021-11-21 00:50:54,944 INFO L78 Accepts]: Start accepts. Automaton has 10048 states and 15746 transitions. Word has length 192 [2021-11-21 00:50:54,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:50:54,945 INFO L470 AbstractCegarLoop]: Abstraction has 10048 states and 15746 transitions. [2021-11-21 00:50:54,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 8.88888888888889) internal successors, (80), 10 states have internal predecessors, (80), 6 states have call successors, (37), 2 states have call predecessors, (37), 5 states have return successors, (32), 7 states have call predecessors, (32), 6 states have call successors, (32) [2021-11-21 00:50:54,945 INFO L276 IsEmpty]: Start isEmpty. Operand 10048 states and 15746 transitions. [2021-11-21 00:50:54,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-11-21 00:50:54,963 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:50:54,964 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 7, 7, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:50:55,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d53e27-430a-4b50-a5ae-51496efefd3e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:50:55,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d53e27-430a-4b50-a5ae-51496efefd3e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:50:55,190 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 00:50:55,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:50:55,191 INFO L85 PathProgramCache]: Analyzing trace with hash 2137099389, now seen corresponding path program 1 times [2021-11-21 00:50:55,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:50:55,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277181236] [2021-11-21 00:50:55,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:50:55,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:50:55,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:50:55,564 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2021-11-21 00:50:55,565 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:50:55,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277181236] [2021-11-21 00:50:55,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277181236] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:50:55,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:50:55,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 00:50:55,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845990011] [2021-11-21 00:50:55,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:50:55,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:50:55,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:50:55,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:50:55,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:50:55,569 INFO L87 Difference]: Start difference. First operand 10048 states and 15746 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 5 states have internal predecessors, (81), 3 states have call successors, (40), 4 states have call predecessors, (40), 2 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2021-11-21 00:50:57,929 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:51:06,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:51:06,419 INFO L93 Difference]: Finished difference Result 10099 states and 15803 transitions. [2021-11-21 00:51:06,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 00:51:06,419 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 5 states have internal predecessors, (81), 3 states have call successors, (40), 4 states have call predecessors, (40), 2 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) Word has length 230 [2021-11-21 00:51:06,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:51:06,481 INFO L225 Difference]: With dead ends: 10099 [2021-11-21 00:51:06,481 INFO L226 Difference]: Without dead ends: 10060 [2021-11-21 00:51:06,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-21 00:51:06,493 INFO L933 BasicCegarLoop]: 2776 mSDtfsCounter, 2700 mSDsluCounter, 7661 mSDsCounter, 0 mSdLazyCounter, 4521 mSolverCounterSat, 828 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3047 SdHoareTripleChecker+Valid, 9576 SdHoareTripleChecker+Invalid, 5350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 828 IncrementalHoareTripleChecker+Valid, 4521 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:51:06,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3047 Valid, 9576 Invalid, 5350 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [828 Valid, 4521 Invalid, 1 Unknown, 0 Unchecked, 10.0s Time] [2021-11-21 00:51:06,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10060 states. [2021-11-21 00:51:07,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10060 to 10047. [2021-11-21 00:51:07,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10047 states, 5515 states have (on average 1.2106980961015412) internal successors, (6677), 5885 states have internal predecessors, (6677), 3718 states have call successors, (3718), 733 states have call predecessors, (3718), 811 states have return successors, (5346), 3604 states have call predecessors, (5346), 3715 states have call successors, (5346) [2021-11-21 00:51:07,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10047 states to 10047 states and 15741 transitions. [2021-11-21 00:51:07,473 INFO L78 Accepts]: Start accepts. Automaton has 10047 states and 15741 transitions. Word has length 230 [2021-11-21 00:51:07,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:51:07,474 INFO L470 AbstractCegarLoop]: Abstraction has 10047 states and 15741 transitions. [2021-11-21 00:51:07,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 5 states have internal predecessors, (81), 3 states have call successors, (40), 4 states have call predecessors, (40), 2 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2021-11-21 00:51:07,475 INFO L276 IsEmpty]: Start isEmpty. Operand 10047 states and 15741 transitions. [2021-11-21 00:51:07,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-11-21 00:51:07,493 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:51:07,493 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 7, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:51:07,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-21 00:51:07,494 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)] === [2021-11-21 00:51:07,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:51:07,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1291749362, now seen corresponding path program 1 times [2021-11-21 00:51:07,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:51:07,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964900163] [2021-11-21 00:51:07,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:51:07,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:51:07,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:51:07,736 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-11-21 00:51:07,736 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:51:07,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964900163] [2021-11-21 00:51:07,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964900163] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:51:07,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:51:07,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:51:07,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270727851] [2021-11-21 00:51:07,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:51:07,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:51:07,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:51:07,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:51:07,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:51:07,739 INFO L87 Difference]: Start difference. First operand 10047 states and 15741 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (47), 2 states have call predecessors, (47), 2 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2021-11-21 00:51:10,046 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:51:12,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:51:12,514 INFO L93 Difference]: Finished difference Result 20136 states and 31563 transitions. [2021-11-21 00:51:12,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:51:12,514 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (47), 2 states have call predecessors, (47), 2 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) Word has length 239 [2021-11-21 00:51:12,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:51:12,590 INFO L225 Difference]: With dead ends: 20136 [2021-11-21 00:51:12,591 INFO L226 Difference]: Without dead ends: 10105 [2021-11-21 00:51:12,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:51:12,684 INFO L933 BasicCegarLoop]: 2010 mSDtfsCounter, 31 mSDsluCounter, 4441 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 5983 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-21 00:51:12,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 5983 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 731 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2021-11-21 00:51:12,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10105 states. [2021-11-21 00:51:13,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10105 to 10051. [2021-11-21 00:51:13,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10051 states, 5519 states have (on average 1.2105453886573654) internal successors, (6681), 5889 states have internal predecessors, (6681), 3718 states have call successors, (3718), 733 states have call predecessors, (3718), 811 states have return successors, (5346), 3604 states have call predecessors, (5346), 3715 states have call successors, (5346) [2021-11-21 00:51:13,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10051 states to 10051 states and 15745 transitions. [2021-11-21 00:51:13,958 INFO L78 Accepts]: Start accepts. Automaton has 10051 states and 15745 transitions. Word has length 239 [2021-11-21 00:51:13,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:51:13,959 INFO L470 AbstractCegarLoop]: Abstraction has 10051 states and 15745 transitions. [2021-11-21 00:51:13,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (47), 2 states have call predecessors, (47), 2 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2021-11-21 00:51:13,959 INFO L276 IsEmpty]: Start isEmpty. Operand 10051 states and 15745 transitions. [2021-11-21 00:51:13,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2021-11-21 00:51:13,977 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:51:13,977 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 7, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:51:13,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-21 00:51:13,978 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)] === [2021-11-21 00:51:13,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:51:13,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1481199039, now seen corresponding path program 1 times [2021-11-21 00:51:13,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:51:13,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801586842] [2021-11-21 00:51:13,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:51:13,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:51:14,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:51:14,214 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-11-21 00:51:14,214 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:51:14,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801586842] [2021-11-21 00:51:14,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801586842] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:51:14,215 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:51:14,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:51:14,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701871276] [2021-11-21 00:51:14,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:51:14,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:51:14,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:51:14,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:51:14,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:51:14,218 INFO L87 Difference]: Start difference. First operand 10051 states and 15745 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 2 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2021-11-21 00:51:16,437 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:51:18,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:51:18,505 INFO L93 Difference]: Finished difference Result 17839 states and 27949 transitions. [2021-11-21 00:51:18,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:51:18,506 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 2 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) Word has length 245 [2021-11-21 00:51:18,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:51:18,577 INFO L225 Difference]: With dead ends: 17839 [2021-11-21 00:51:18,577 INFO L226 Difference]: Without dead ends: 7804 [2021-11-21 00:51:18,660 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 [2021-11-21 00:51:18,661 INFO L933 BasicCegarLoop]: 2016 mSDtfsCounter, 36 mSDsluCounter, 2212 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 3995 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:51:18,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 3995 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 473 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2021-11-21 00:51:18,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7804 states. [2021-11-21 00:51:19,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7804 to 7735. [2021-11-21 00:51:19,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7735 states, 4255 states have (on average 1.2072855464159813) internal successors, (5137), 4528 states have internal predecessors, (5137), 2843 states have call successors, (2843), 548 states have call predecessors, (2843), 634 states have return successors, (4114), 2789 states have call predecessors, (4114), 2840 states have call successors, (4114) [2021-11-21 00:51:19,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7735 states to 7735 states and 12094 transitions. [2021-11-21 00:51:19,382 INFO L78 Accepts]: Start accepts. Automaton has 7735 states and 12094 transitions. Word has length 245 [2021-11-21 00:51:19,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:51:19,383 INFO L470 AbstractCegarLoop]: Abstraction has 7735 states and 12094 transitions. [2021-11-21 00:51:19,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 2 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2021-11-21 00:51:19,383 INFO L276 IsEmpty]: Start isEmpty. Operand 7735 states and 12094 transitions. [2021-11-21 00:51:19,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2021-11-21 00:51:19,403 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:51:19,403 INFO L514 BasicCegarLoop]: trace histogram [25, 13, 11, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 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] [2021-11-21 00:51:19,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-21 00:51:19,404 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 00:51:19,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:51:19,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1878924571, now seen corresponding path program 1 times [2021-11-21 00:51:19,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:51:19,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521523131] [2021-11-21 00:51:19,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:51:19,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:51:19,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:51:19,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1177 trivial. 0 not checked. [2021-11-21 00:51:19,648 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:51:19,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521523131] [2021-11-21 00:51:19,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521523131] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:51:19,649 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:51:19,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:51:19,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368765150] [2021-11-21 00:51:19,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:51:19,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:51:19,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:51:19,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:51:19,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:51:19,652 INFO L87 Difference]: Start difference. First operand 7735 states and 12094 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 3 states have call successors, (90), 2 states have call predecessors, (90), 1 states have return successors, (81), 3 states have call predecessors, (81), 3 states have call successors, (81) [2021-11-21 00:51:21,799 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:51:23,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:51:23,973 INFO L93 Difference]: Finished difference Result 10037 states and 15680 transitions. [2021-11-21 00:51:23,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:51:23,974 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 3 states have call successors, (90), 2 states have call predecessors, (90), 1 states have return successors, (81), 3 states have call predecessors, (81), 3 states have call successors, (81) Word has length 466 [2021-11-21 00:51:23,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:51:24,027 INFO L225 Difference]: With dead ends: 10037 [2021-11-21 00:51:24,027 INFO L226 Difference]: Without dead ends: 7887 [2021-11-21 00:51:24,055 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 [2021-11-21 00:51:24,055 INFO L933 BasicCegarLoop]: 2028 mSDtfsCounter, 189 mSDsluCounter, 2184 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 3980 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-21 00:51:24,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 3980 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 474 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2021-11-21 00:51:24,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7887 states. [2021-11-21 00:51:24,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7887 to 7846. [2021-11-21 00:51:24,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7846 states, 4321 states have (on average 1.20735940754455) internal successors, (5217), 4598 states have internal predecessors, (5217), 2873 states have call successors, (2873), 563 states have call predecessors, (2873), 649 states have return successors, (4149), 2818 states have call predecessors, (4149), 2870 states have call successors, (4149) [2021-11-21 00:51:24,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7846 states to 7846 states and 12239 transitions. [2021-11-21 00:51:24,877 INFO L78 Accepts]: Start accepts. Automaton has 7846 states and 12239 transitions. Word has length 466 [2021-11-21 00:51:24,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:51:24,878 INFO L470 AbstractCegarLoop]: Abstraction has 7846 states and 12239 transitions. [2021-11-21 00:51:24,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 3 states have call successors, (90), 2 states have call predecessors, (90), 1 states have return successors, (81), 3 states have call predecessors, (81), 3 states have call successors, (81) [2021-11-21 00:51:24,878 INFO L276 IsEmpty]: Start isEmpty. Operand 7846 states and 12239 transitions. [2021-11-21 00:51:24,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2021-11-21 00:51:24,898 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:51:24,898 INFO L514 BasicCegarLoop]: trace histogram [19, 13, 13, 11, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 7, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:51:24,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-21 00:51:24,899 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-21 00:51:24,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:51:24,900 INFO L85 PathProgramCache]: Analyzing trace with hash 335946597, now seen corresponding path program 1 times [2021-11-21 00:51:24,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:51:24,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062374888] [2021-11-21 00:51:24,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:51:24,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:51:25,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:51:25,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1372 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2021-11-21 00:51:25,265 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:51:25,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062374888] [2021-11-21 00:51:25,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062374888] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:51:25,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079068660] [2021-11-21 00:51:25,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:51:25,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:51:25,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d53e27-430a-4b50-a5ae-51496efefd3e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:51:25,270 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d53e27-430a-4b50-a5ae-51496efefd3e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:51:25,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d53e27-430a-4b50-a5ae-51496efefd3e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 00:51:26,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:51:26,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 4124 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:51:26,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:51:27,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1372 backedges. 217 proven. 1 refuted. 0 times theorem prover too weak. 1154 trivial. 0 not checked. [2021-11-21 00:51:27,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:51:29,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1372 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2021-11-21 00:51:29,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079068660] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:51:29,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [470490912] [2021-11-21 00:51:30,066 INFO L159 IcfgInterpreter]: Started Sifa with 247 locations of interest [2021-11-21 00:51:30,066 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:51:30,077 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:51:30,083 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:51:30,084 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:51:46,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:46,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:46,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:46,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:46,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:46,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:46,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:46,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:51:46,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:51:46,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:51:46,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:51:46,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:51:46,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:51:46,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 29 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 41 [2021-11-21 00:52:09,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:52:09,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:09,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:09,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:09,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:09,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:09,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:09,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:09,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:09,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:09,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:09,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:09,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:09,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:09,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:09,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:09,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:09,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:09,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:09,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:09,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:09,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:52:09,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 49 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 41