./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-calxeda-xgmac.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1856421-2ca2-4411-91f2-129d7514ccb6/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1856421-2ca2-4411-91f2-129d7514ccb6/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1856421-2ca2-4411-91f2-129d7514ccb6/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1856421-2ca2-4411-91f2-129d7514ccb6/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-calxeda-xgmac.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1856421-2ca2-4411-91f2-129d7514ccb6/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1856421-2ca2-4411-91f2-129d7514ccb6/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 3fe54d83d46de95e8e0767545626d085bd64ef94fa067827f6d89c4bc8eb39d0 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:30:53,628 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:30:53,631 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:30:53,674 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:30:53,674 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:30:53,675 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:30:53,677 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:30:53,680 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:30:53,682 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:30:53,683 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:30:53,684 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:30:53,685 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:30:53,686 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:30:53,690 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:30:53,692 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:30:53,694 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:30:53,698 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:30:53,699 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:30:53,701 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:30:53,706 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:30:53,710 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:30:53,712 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:30:53,714 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:30:53,716 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:30:53,722 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:30:53,722 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:30:53,723 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:30:53,724 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:30:53,725 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:30:53,726 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:30:53,726 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:30:53,727 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:30:53,727 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:30:53,728 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:30:53,729 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:30:53,729 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:30:53,730 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:30:53,730 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:30:53,730 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:30:53,731 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:30:53,731 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:30:53,734 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1856421-2ca2-4411-91f2-129d7514ccb6/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-25 20:30:53,771 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:30:53,771 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:30:53,772 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:30:53,772 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:30:53,773 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:30:53,773 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:30:53,773 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:30:53,773 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:30:53,773 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:30:53,774 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:30:53,774 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:30:53,774 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:30:53,774 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:30:53,774 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:30:53,775 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:30:53,775 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:30:53,775 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:30:53,775 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:30:53,776 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:30:53,776 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:30:53,776 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:30:53,777 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:30:53,777 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:30:53,777 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:30:53,777 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:30:53,778 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:30:53,778 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:30:53,778 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:30:53,778 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:30:53,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:30:53,779 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:30:53,779 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:30:53,779 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:30:53,779 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:30:53,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:30:53,780 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:30:53,780 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:30:53,780 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:30:53,780 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_c1856421-2ca2-4411-91f2-129d7514ccb6/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1856421-2ca2-4411-91f2-129d7514ccb6/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3fe54d83d46de95e8e0767545626d085bd64ef94fa067827f6d89c4bc8eb39d0 [2021-11-25 20:30:54,025 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:30:54,052 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:30:54,055 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:30:54,056 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:30:54,057 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:30:54,059 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1856421-2ca2-4411-91f2-129d7514ccb6/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-calxeda-xgmac.cil.i [2021-11-25 20:30:54,128 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1856421-2ca2-4411-91f2-129d7514ccb6/bin/utaipan-eEHZpOm5b7/data/6ced32f23/7ca658902ff04b79b574add8c5de8668/FLAG022fd3454 [2021-11-25 20:30:55,084 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:30:55,085 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1856421-2ca2-4411-91f2-129d7514ccb6/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-calxeda-xgmac.cil.i [2021-11-25 20:30:55,169 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1856421-2ca2-4411-91f2-129d7514ccb6/bin/utaipan-eEHZpOm5b7/data/6ced32f23/7ca658902ff04b79b574add8c5de8668/FLAG022fd3454 [2021-11-25 20:30:55,453 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1856421-2ca2-4411-91f2-129d7514ccb6/bin/utaipan-eEHZpOm5b7/data/6ced32f23/7ca658902ff04b79b574add8c5de8668 [2021-11-25 20:30:55,455 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:30:55,457 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:30:55,458 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:30:55,458 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:30:55,462 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:30:55,462 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:30:55" (1/1) ... [2021-11-25 20:30:55,464 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37ac9dd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:30:55, skipping insertion in model container [2021-11-25 20:30:55,464 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:30:55" (1/1) ... [2021-11-25 20:30:55,471 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:30:55,626 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:30:58,899 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_c1856421-2ca2-4411-91f2-129d7514ccb6/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-calxeda-xgmac.cil.i[358326,358339] [2021-11-25 20:30:58,902 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_c1856421-2ca2-4411-91f2-129d7514ccb6/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-calxeda-xgmac.cil.i[358495,358508] [2021-11-25 20:30:58,911 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_c1856421-2ca2-4411-91f2-129d7514ccb6/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-calxeda-xgmac.cil.i[358662,358675] [2021-11-25 20:30:58,912 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_c1856421-2ca2-4411-91f2-129d7514ccb6/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-calxeda-xgmac.cil.i[358830,358843] [2021-11-25 20:30:58,933 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:30:59,006 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:30:59,519 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_c1856421-2ca2-4411-91f2-129d7514ccb6/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-calxeda-xgmac.cil.i[358326,358339] [2021-11-25 20:30:59,519 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_c1856421-2ca2-4411-91f2-129d7514ccb6/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-calxeda-xgmac.cil.i[358495,358508] [2021-11-25 20:30:59,520 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_c1856421-2ca2-4411-91f2-129d7514ccb6/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-calxeda-xgmac.cil.i[358662,358675] [2021-11-25 20:30:59,520 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_c1856421-2ca2-4411-91f2-129d7514ccb6/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-calxeda-xgmac.cil.i[358830,358843] [2021-11-25 20:30:59,528 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:30:59,830 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:30:59,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:30:59 WrapperNode [2021-11-25 20:30:59,831 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:30:59,833 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:30:59,833 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:30:59,833 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:30:59,841 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:30:59" (1/1) ... [2021-11-25 20:30:59,964 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:30:59" (1/1) ... [2021-11-25 20:31:00,200 INFO L137 Inliner]: procedures = 502, calls = 2414, calls flagged for inlining = 253, calls inlined = 226, statements flattened = 5408 [2021-11-25 20:31:00,201 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:31:00,202 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:31:00,203 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:31:00,203 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:31:00,213 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:30:59" (1/1) ... [2021-11-25 20:31:00,214 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:30:59" (1/1) ... [2021-11-25 20:31:00,253 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:30:59" (1/1) ... [2021-11-25 20:31:00,264 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:30:59" (1/1) ... [2021-11-25 20:31:00,450 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:30:59" (1/1) ... [2021-11-25 20:31:00,484 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:30:59" (1/1) ... [2021-11-25 20:31:00,518 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:30:59" (1/1) ... [2021-11-25 20:31:00,553 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:31:00,554 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:31:00,555 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:31:00,555 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:31:00,556 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:30:59" (1/1) ... [2021-11-25 20:31:00,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:31:00,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1856421-2ca2-4411-91f2-129d7514ccb6/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:31:00,592 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1856421-2ca2-4411-91f2-129d7514ccb6/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:31:00,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1856421-2ca2-4411-91f2-129d7514ccb6/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:31:00,644 INFO L130 BoogieDeclarations]: Found specification of procedure device_set_wakeup_enable [2021-11-25 20:31:00,645 INFO L138 BoogieDeclarations]: Found implementation of procedure device_set_wakeup_enable [2021-11-25 20:31:00,645 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-25 20:31:00,645 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-25 20:31:00,645 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_automaton_state_0_6 [2021-11-25 20:31:00,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_automaton_state_0_6 [2021-11-25 20:31:00,646 INFO L130 BoogieDeclarations]: Found specification of procedure desc_set_buf_addr [2021-11-25 20:31:00,646 INFO L138 BoogieDeclarations]: Found implementation of procedure desc_set_buf_addr [2021-11-25 20:31:00,646 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-25 20:31:00,646 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-25 20:31:00,646 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-25 20:31:00,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-25 20:31:00,647 INFO L130 BoogieDeclarations]: Found specification of procedure xgmac_interrupt [2021-11-25 20:31:00,647 INFO L138 BoogieDeclarations]: Found implementation of procedure xgmac_interrupt [2021-11-25 20:31:00,647 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2021-11-25 20:31:00,647 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2021-11-25 20:31:00,647 INFO L130 BoogieDeclarations]: Found specification of procedure xgmac_rx_refill [2021-11-25 20:31:00,647 INFO L138 BoogieDeclarations]: Found implementation of procedure xgmac_rx_refill [2021-11-25 20:31:00,648 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-25 20:31:00,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-25 20:31:00,648 INFO L130 BoogieDeclarations]: Found specification of procedure netif_napi_del [2021-11-25 20:31:00,648 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_napi_del [2021-11-25 20:31:00,648 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2021-11-25 20:31:00,648 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2021-11-25 20:31:00,649 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-11-25 20:31:00,649 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-11-25 20:31:00,649 INFO L130 BoogieDeclarations]: Found specification of procedure xgmac_poll_controller [2021-11-25 20:31:00,649 INFO L138 BoogieDeclarations]: Found implementation of procedure xgmac_poll_controller [2021-11-25 20:31:00,650 INFO L130 BoogieDeclarations]: Found specification of procedure crc32_le [2021-11-25 20:31:00,650 INFO L138 BoogieDeclarations]: Found implementation of procedure crc32_le [2021-11-25 20:31:00,650 INFO L130 BoogieDeclarations]: Found specification of procedure xgmac_set_mac_addr [2021-11-25 20:31:00,650 INFO L138 BoogieDeclarations]: Found implementation of procedure xgmac_set_mac_addr [2021-11-25 20:31:00,650 INFO L130 BoogieDeclarations]: Found specification of procedure __netif_tx_unlock [2021-11-25 20:31:00,651 INFO L138 BoogieDeclarations]: Found implementation of procedure __netif_tx_unlock [2021-11-25 20:31:00,651 INFO L130 BoogieDeclarations]: Found specification of procedure xgmac_tx_timeout [2021-11-25 20:31:00,651 INFO L138 BoogieDeclarations]: Found implementation of procedure xgmac_tx_timeout [2021-11-25 20:31:00,651 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-25 20:31:00,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-25 20:31:00,651 INFO L130 BoogieDeclarations]: Found specification of procedure skb_end_pointer [2021-11-25 20:31:00,652 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_end_pointer [2021-11-25 20:31:00,652 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-25 20:31:00,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-25 20:31:00,652 INFO L130 BoogieDeclarations]: Found specification of procedure platform_get_resource [2021-11-25 20:31:00,653 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_get_resource [2021-11-25 20:31:00,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 20:31:00,654 INFO L130 BoogieDeclarations]: Found specification of procedure iounmap [2021-11-25 20:31:00,654 INFO L138 BoogieDeclarations]: Found implementation of procedure iounmap [2021-11-25 20:31:00,654 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-25 20:31:00,654 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-25 20:31:00,655 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-11-25 20:31:00,655 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-11-25 20:31:00,655 INFO L130 BoogieDeclarations]: Found specification of procedure desc_set_buf_addr_and_size [2021-11-25 20:31:00,655 INFO L138 BoogieDeclarations]: Found implementation of procedure desc_set_buf_addr_and_size [2021-11-25 20:31:00,656 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-25 20:31:00,656 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-25 20:31:00,656 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-25 20:31:00,656 INFO L130 BoogieDeclarations]: Found specification of procedure xgmac_probe [2021-11-25 20:31:00,657 INFO L138 BoogieDeclarations]: Found implementation of procedure xgmac_probe [2021-11-25 20:31:00,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-25 20:31:00,657 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-25 20:31:00,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-25 20:31:00,657 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 20:31:00,657 INFO L130 BoogieDeclarations]: Found specification of procedure desc_set_buf_len [2021-11-25 20:31:00,658 INFO L138 BoogieDeclarations]: Found implementation of procedure desc_set_buf_len [2021-11-25 20:31:00,658 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2021-11-25 20:31:00,658 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2021-11-25 20:31:00,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-25 20:31:00,658 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-25 20:31:00,658 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_interrupt_context [2021-11-25 20:31:00,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_interrupt_context [2021-11-25 20:31:00,659 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2021-11-25 20:31:00,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2021-11-25 20:31:00,660 INFO L130 BoogieDeclarations]: Found specification of procedure xgmac_suspend [2021-11-25 20:31:00,660 INFO L138 BoogieDeclarations]: Found implementation of procedure xgmac_suspend [2021-11-25 20:31:00,660 INFO L130 BoogieDeclarations]: Found specification of procedure __netif_tx_lock [2021-11-25 20:31:00,660 INFO L138 BoogieDeclarations]: Found implementation of procedure __netif_tx_lock [2021-11-25 20:31:00,660 INFO L130 BoogieDeclarations]: Found specification of procedure xgmac_open [2021-11-25 20:31:00,661 INFO L138 BoogieDeclarations]: Found implementation of procedure xgmac_open [2021-11-25 20:31:00,661 INFO L130 BoogieDeclarations]: Found specification of procedure desc_get_buf_len [2021-11-25 20:31:00,661 INFO L138 BoogieDeclarations]: Found implementation of procedure desc_get_buf_len [2021-11-25 20:31:00,661 INFO L130 BoogieDeclarations]: Found specification of procedure napi_enable [2021-11-25 20:31:00,662 INFO L138 BoogieDeclarations]: Found implementation of procedure napi_enable [2021-11-25 20:31:00,662 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-25 20:31:00,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-25 20:31:00,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 20:31:00,663 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_1 [2021-11-25 20:31:00,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_1 [2021-11-25 20:31:00,664 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_2 [2021-11-25 20:31:00,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_2 [2021-11-25 20:31:00,664 INFO L130 BoogieDeclarations]: Found specification of procedure dma_map_single_attrs [2021-11-25 20:31:00,664 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_map_single_attrs [2021-11-25 20:31:00,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:31:00,665 INFO L130 BoogieDeclarations]: Found specification of procedure xgmac_pmt [2021-11-25 20:31:00,665 INFO L138 BoogieDeclarations]: Found implementation of procedure xgmac_pmt [2021-11-25 20:31:00,665 INFO L130 BoogieDeclarations]: Found specification of procedure is_valid_ether_addr [2021-11-25 20:31:00,665 INFO L138 BoogieDeclarations]: Found implementation of procedure is_valid_ether_addr [2021-11-25 20:31:00,665 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-25 20:31:00,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-25 20:31:00,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 20:31:00,666 INFO L130 BoogieDeclarations]: Found specification of procedure xgmac_free_tx_skbufs [2021-11-25 20:31:00,666 INFO L138 BoogieDeclarations]: Found implementation of procedure xgmac_free_tx_skbufs [2021-11-25 20:31:00,666 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-25 20:31:00,667 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-25 20:31:00,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-25 20:31:00,667 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-25 20:31:00,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-25 20:31:00,671 INFO L130 BoogieDeclarations]: Found specification of procedure platform_get_drvdata [2021-11-25 20:31:00,672 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_get_drvdata [2021-11-25 20:31:00,672 INFO L130 BoogieDeclarations]: Found specification of procedure debug_dma_map_page [2021-11-25 20:31:00,672 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_dma_map_page [2021-11-25 20:31:00,673 INFO L130 BoogieDeclarations]: Found specification of procedure napi_disable [2021-11-25 20:31:00,673 INFO L138 BoogieDeclarations]: Found implementation of procedure napi_disable [2021-11-25 20:31:00,673 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-25 20:31:00,674 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-25 20:31:00,674 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2021-11-25 20:31:00,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2021-11-25 20:31:00,680 INFO L130 BoogieDeclarations]: Found specification of procedure device_can_wakeup [2021-11-25 20:31:00,680 INFO L138 BoogieDeclarations]: Found implementation of procedure device_can_wakeup [2021-11-25 20:31:00,680 INFO L130 BoogieDeclarations]: Found specification of procedure dev_name [2021-11-25 20:31:00,680 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_name [2021-11-25 20:31:00,680 INFO L130 BoogieDeclarations]: Found specification of procedure writel [2021-11-25 20:31:00,681 INFO L138 BoogieDeclarations]: Found implementation of procedure writel [2021-11-25 20:31:00,681 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-25 20:31:00,681 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-25 20:31:00,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:31:00,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:31:00,681 INFO L130 BoogieDeclarations]: Found specification of procedure xgmac_mac_disable [2021-11-25 20:31:00,681 INFO L138 BoogieDeclarations]: Found implementation of procedure xgmac_mac_disable [2021-11-25 20:31:00,681 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-25 20:31:00,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-25 20:31:00,682 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-25 20:31:00,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-25 20:31:00,682 INFO L130 BoogieDeclarations]: Found specification of procedure desc_init_tx_desc [2021-11-25 20:31:00,682 INFO L138 BoogieDeclarations]: Found implementation of procedure desc_init_tx_desc [2021-11-25 20:31:00,682 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~X~int~X~int~X~$Pointer$~TO~~dma_addr_t~0 [2021-11-25 20:31:00,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~X~int~X~int~X~$Pointer$~TO~~dma_addr_t~0 [2021-11-25 20:31:00,683 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-25 20:31:00,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-25 20:31:00,683 INFO L130 BoogieDeclarations]: Found specification of procedure request_irq [2021-11-25 20:31:00,683 INFO L138 BoogieDeclarations]: Found implementation of procedure request_irq [2021-11-25 20:31:00,683 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_size_call_parameter [2021-11-25 20:31:00,683 INFO L130 BoogieDeclarations]: Found specification of procedure kmemcheck_mark_initialized [2021-11-25 20:31:00,683 INFO L138 BoogieDeclarations]: Found implementation of procedure kmemcheck_mark_initialized [2021-11-25 20:31:00,684 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_process_context [2021-11-25 20:31:00,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_process_context [2021-11-25 20:31:00,684 INFO L130 BoogieDeclarations]: Found specification of procedure bitrev32 [2021-11-25 20:31:00,684 INFO L138 BoogieDeclarations]: Found implementation of procedure bitrev32 [2021-11-25 20:31:00,684 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-25 20:31:00,684 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-25 20:31:00,684 INFO L130 BoogieDeclarations]: Found specification of procedure __netif_schedule [2021-11-25 20:31:00,685 INFO L138 BoogieDeclarations]: Found implementation of procedure __netif_schedule [2021-11-25 20:31:00,685 INFO L130 BoogieDeclarations]: Found specification of procedure debug_dma_unmap_page [2021-11-25 20:31:00,685 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_dma_unmap_page [2021-11-25 20:31:00,685 INFO L130 BoogieDeclarations]: Found specification of procedure dma_unmap_single_attrs [2021-11-25 20:31:00,685 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_unmap_single_attrs [2021-11-25 20:31:00,685 INFO L130 BoogieDeclarations]: Found specification of procedure xgmac_mac_enable [2021-11-25 20:31:00,685 INFO L138 BoogieDeclarations]: Found implementation of procedure xgmac_mac_enable [2021-11-25 20:31:00,686 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2021-11-25 20:31:00,686 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2021-11-25 20:31:00,686 INFO L130 BoogieDeclarations]: Found specification of procedure netif_start_queue [2021-11-25 20:31:00,686 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_start_queue [2021-11-25 20:31:00,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 20:31:00,687 INFO L130 BoogieDeclarations]: Found specification of procedure xgmac_stop [2021-11-25 20:31:00,687 INFO L138 BoogieDeclarations]: Found implementation of procedure xgmac_stop [2021-11-25 20:31:00,687 INFO L130 BoogieDeclarations]: Found specification of procedure desc_set_tx_owner [2021-11-25 20:31:00,687 INFO L138 BoogieDeclarations]: Found implementation of procedure desc_set_tx_owner [2021-11-25 20:31:00,687 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2021-11-25 20:31:00,687 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2021-11-25 20:31:00,687 INFO L130 BoogieDeclarations]: Found specification of procedure platform_get_irq [2021-11-25 20:31:00,688 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_get_irq [2021-11-25 20:31:00,688 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 20:31:00,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 20:31:00,688 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-25 20:31:00,688 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-25 20:31:00,688 INFO L130 BoogieDeclarations]: Found specification of procedure dma_mapping_error [2021-11-25 20:31:00,688 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_mapping_error [2021-11-25 20:31:00,689 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-25 20:31:00,689 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-25 20:31:00,689 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_request_irq [2021-11-25 20:31:00,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_request_irq [2021-11-25 20:31:00,691 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-25 20:31:00,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-25 20:31:00,691 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_irq [2021-11-25 20:31:00,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_irq [2021-11-25 20:31:00,691 INFO L130 BoogieDeclarations]: Found specification of procedure xgmac_set_flow_ctrl [2021-11-25 20:31:00,691 INFO L138 BoogieDeclarations]: Found implementation of procedure xgmac_set_flow_ctrl [2021-11-25 20:31:00,691 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-25 20:31:00,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-25 20:31:00,692 INFO L130 BoogieDeclarations]: Found specification of procedure xgmac_resume [2021-11-25 20:31:00,692 INFO L138 BoogieDeclarations]: Found implementation of procedure xgmac_resume [2021-11-25 20:31:00,692 INFO L130 BoogieDeclarations]: Found specification of procedure dma_free_attrs [2021-11-25 20:31:00,692 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_free_attrs [2021-11-25 20:31:00,692 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-11-25 20:31:00,692 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-11-25 20:31:00,693 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-25 20:31:00,693 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-25 20:31:00,693 INFO L130 BoogieDeclarations]: Found specification of procedure irq_set_irq_wake [2021-11-25 20:31:00,693 INFO L138 BoogieDeclarations]: Found implementation of procedure irq_set_irq_wake [2021-11-25 20:31:00,693 INFO L130 BoogieDeclarations]: Found specification of procedure desc_get_tx_fs [2021-11-25 20:31:00,693 INFO L138 BoogieDeclarations]: Found implementation of procedure desc_get_tx_fs [2021-11-25 20:31:00,693 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-25 20:31:00,693 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-25 20:31:00,694 INFO L130 BoogieDeclarations]: Found specification of procedure xgmac_set_rx_mode [2021-11-25 20:31:00,694 INFO L138 BoogieDeclarations]: Found implementation of procedure xgmac_set_rx_mode [2021-11-25 20:31:00,694 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2021-11-25 20:31:00,694 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2021-11-25 20:31:00,694 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-25 20:31:00,694 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-25 20:31:00,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 20:31:00,695 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-25 20:31:00,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-25 20:31:00,695 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~$Pointer$~TO~int [2021-11-25 20:31:00,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~$Pointer$~TO~int [2021-11-25 20:31:00,695 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2021-11-25 20:31:00,695 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2021-11-25 20:31:00,695 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_any [2021-11-25 20:31:00,695 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_any [2021-11-25 20:31:00,696 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_stop_queue [2021-11-25 20:31:00,696 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_stop_queue [2021-11-25 20:31:00,696 INFO L130 BoogieDeclarations]: Found specification of procedure __readl [2021-11-25 20:31:00,696 INFO L138 BoogieDeclarations]: Found implementation of procedure __readl [2021-11-25 20:31:00,696 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-25 20:31:00,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-25 20:31:00,696 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_work [2021-11-25 20:31:00,696 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_work [2021-11-25 20:31:00,697 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~X~$Pointer$~TO~VOID [2021-11-25 20:31:00,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~X~$Pointer$~TO~VOID [2021-11-25 20:31:00,697 INFO L130 BoogieDeclarations]: Found specification of procedure __writel [2021-11-25 20:31:00,697 INFO L138 BoogieDeclarations]: Found implementation of procedure __writel [2021-11-25 20:31:00,697 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_automaton_state_1_6 [2021-11-25 20:31:00,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_automaton_state_1_6 [2021-11-25 20:31:00,697 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2021-11-25 20:31:00,698 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2021-11-25 20:31:00,702 INFO L130 BoogieDeclarations]: Found specification of procedure dma_alloc_attrs [2021-11-25 20:31:00,702 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_alloc_attrs [2021-11-25 20:31:00,702 INFO L130 BoogieDeclarations]: Found specification of procedure readl [2021-11-25 20:31:00,702 INFO L138 BoogieDeclarations]: Found implementation of procedure readl [2021-11-25 20:31:00,702 INFO L130 BoogieDeclarations]: Found specification of procedure xgmac_remove [2021-11-25 20:31:00,703 INFO L138 BoogieDeclarations]: Found implementation of procedure xgmac_remove [2021-11-25 20:31:00,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:31:00,703 INFO L130 BoogieDeclarations]: Found specification of procedure desc_get_buf_addr [2021-11-25 20:31:00,703 INFO L138 BoogieDeclarations]: Found implementation of procedure desc_get_buf_addr [2021-11-25 20:31:00,704 INFO L130 BoogieDeclarations]: Found specification of procedure dma_unmap_page [2021-11-25 20:31:00,705 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_unmap_page [2021-11-25 20:31:00,705 INFO L130 BoogieDeclarations]: Found specification of procedure resource_size [2021-11-25 20:31:00,705 INFO L138 BoogieDeclarations]: Found implementation of procedure resource_size [2021-11-25 20:31:00,705 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-25 20:31:00,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-25 20:31:00,705 INFO L130 BoogieDeclarations]: Found specification of procedure desc_get_tx_ls [2021-11-25 20:31:00,705 INFO L138 BoogieDeclarations]: Found implementation of procedure desc_get_tx_ls [2021-11-25 20:31:01,646 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:31:01,650 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:31:02,232 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-25 20:36:13,324 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-25 20:36:13,387 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:36:15,934 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:36:15,934 INFO L301 CfgBuilder]: Removed 10 assume(true) statements. [2021-11-25 20:36:15,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:36:15 BoogieIcfgContainer [2021-11-25 20:36:15,940 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:36:15,943 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:36:15,943 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:36:15,946 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:36:15,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:30:55" (1/3) ... [2021-11-25 20:36:15,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25de019b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:36:15, skipping insertion in model container [2021-11-25 20:36:15,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:30:59" (2/3) ... [2021-11-25 20:36:15,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25de019b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:36:15, skipping insertion in model container [2021-11-25 20:36:15,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:36:15" (3/3) ... [2021-11-25 20:36:15,949 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-calxeda-xgmac.cil.i [2021-11-25 20:36:15,957 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:36:15,957 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-25 20:36:16,028 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:36:16,045 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 20:36:16,048 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-25 20:36:16,104 INFO L276 IsEmpty]: Start isEmpty. Operand has 1536 states, 890 states have (on average 1.2651685393258427) internal successors, (1126), 911 states have internal predecessors, (1126), 528 states have call successors, (528), 116 states have call predecessors, (528), 115 states have return successors, (521), 516 states have call predecessors, (521), 521 states have call successors, (521) [2021-11-25 20:36:16,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-25 20:36:16,119 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:36:16,120 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:36:16,120 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:36:16,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:36:16,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1283422431, now seen corresponding path program 1 times [2021-11-25 20:36:16,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:36:16,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744329356] [2021-11-25 20:36:16,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:36:16,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:36:17,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:36:17,935 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2021-11-25 20:36:17,936 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:36:17,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744329356] [2021-11-25 20:36:17,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744329356] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:36:17,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:36:17,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:36:17,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248320931] [2021-11-25 20:36:17,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:36:17,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:36:17,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:36:17,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:36:17,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:36:17,983 INFO L87 Difference]: Start difference. First operand has 1536 states, 890 states have (on average 1.2651685393258427) internal successors, (1126), 911 states have internal predecessors, (1126), 528 states have call successors, (528), 116 states have call predecessors, (528), 115 states have return successors, (521), 516 states have call predecessors, (521), 521 states have call successors, (521) Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-25 20:36:20,111 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:36:24,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:36:24,404 INFO L93 Difference]: Finished difference Result 4489 states and 6433 transitions. [2021-11-25 20:36:24,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:36:24,406 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 147 [2021-11-25 20:36:24,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:36:24,452 INFO L225 Difference]: With dead ends: 4489 [2021-11-25 20:36:24,452 INFO L226 Difference]: Without dead ends: 2968 [2021-11-25 20:36:24,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:36:24,480 INFO L933 BasicCegarLoop]: 2345 mSDtfsCounter, 2071 mSDsluCounter, 2134 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2071 SdHoareTripleChecker+Valid, 4171 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:36:24,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2071 Valid, 4171 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 634 Invalid, 1 Unknown, 0 Unchecked, 6.1s Time] [2021-11-25 20:36:24,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2968 states. [2021-11-25 20:36:24,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2968 to 2964. [2021-11-25 20:36:24,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2964 states, 1730 states have (on average 1.2595375722543352) internal successors, (2179), 1770 states have internal predecessors, (2179), 1004 states have call successors, (1004), 228 states have call predecessors, (1004), 227 states have return successors, (1001), 991 states have call predecessors, (1001), 1001 states have call successors, (1001) [2021-11-25 20:36:24,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2964 states to 2964 states and 4184 transitions. [2021-11-25 20:36:24,758 INFO L78 Accepts]: Start accepts. Automaton has 2964 states and 4184 transitions. Word has length 147 [2021-11-25 20:36:24,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:36:24,760 INFO L470 AbstractCegarLoop]: Abstraction has 2964 states and 4184 transitions. [2021-11-25 20:36:24,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-25 20:36:24,760 INFO L276 IsEmpty]: Start isEmpty. Operand 2964 states and 4184 transitions. [2021-11-25 20:36:24,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-25 20:36:24,769 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:36:24,770 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:36:24,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:36:24,771 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:36:24,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:36:24,772 INFO L85 PathProgramCache]: Analyzing trace with hash -58863027, now seen corresponding path program 1 times [2021-11-25 20:36:24,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:36:24,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536451432] [2021-11-25 20:36:24,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:36:24,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:36:25,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:36:25,823 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2021-11-25 20:36:25,825 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:36:25,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536451432] [2021-11-25 20:36:25,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536451432] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:36:25,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:36:25,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:36:25,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613233138] [2021-11-25 20:36:25,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:36:25,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:36:25,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:36:25,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:36:25,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:36:25,836 INFO L87 Difference]: Start difference. First operand 2964 states and 4184 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-25 20:36:27,948 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:36:32,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:36:32,934 INFO L93 Difference]: Finished difference Result 8240 states and 11620 transitions. [2021-11-25 20:36:32,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:36:32,935 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 161 [2021-11-25 20:36:32,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:36:32,982 INFO L225 Difference]: With dead ends: 8240 [2021-11-25 20:36:32,982 INFO L226 Difference]: Without dead ends: 5303 [2021-11-25 20:36:32,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:36:33,000 INFO L933 BasicCegarLoop]: 2248 mSDtfsCounter, 1670 mSDsluCounter, 2073 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1670 SdHoareTripleChecker+Valid, 4030 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2021-11-25 20:36:33,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1670 Valid, 4030 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 677 Invalid, 1 Unknown, 0 Unchecked, 6.7s Time] [2021-11-25 20:36:33,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5303 states. [2021-11-25 20:36:33,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5303 to 5274. [2021-11-25 20:36:33,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5274 states, 3077 states have (on average 1.2512187195320117) internal successors, (3850), 3151 states have internal predecessors, (3850), 1757 states have call successors, (1757), 440 states have call predecessors, (1757), 437 states have return successors, (1822), 1724 states have call predecessors, (1822), 1754 states have call successors, (1822) [2021-11-25 20:36:33,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5274 states to 5274 states and 7429 transitions. [2021-11-25 20:36:33,337 INFO L78 Accepts]: Start accepts. Automaton has 5274 states and 7429 transitions. Word has length 161 [2021-11-25 20:36:33,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:36:33,338 INFO L470 AbstractCegarLoop]: Abstraction has 5274 states and 7429 transitions. [2021-11-25 20:36:33,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-25 20:36:33,340 INFO L276 IsEmpty]: Start isEmpty. Operand 5274 states and 7429 transitions. [2021-11-25 20:36:33,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-25 20:36:33,346 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:36:33,347 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:36:33,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 20:36:33,347 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:36:33,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:36:33,348 INFO L85 PathProgramCache]: Analyzing trace with hash 39603629, now seen corresponding path program 1 times [2021-11-25 20:36:33,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:36:33,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920407383] [2021-11-25 20:36:33,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:36:33,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:36:33,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:36:34,321 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2021-11-25 20:36:34,322 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:36:34,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920407383] [2021-11-25 20:36:34,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920407383] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:36:34,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:36:34,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:36:34,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644514152] [2021-11-25 20:36:34,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:36:34,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:36:34,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:36:34,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:36:34,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:36:34,325 INFO L87 Difference]: Start difference. First operand 5274 states and 7429 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-25 20:36:36,438 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:36:42,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:36:42,230 INFO L93 Difference]: Finished difference Result 14636 states and 20487 transitions. [2021-11-25 20:36:42,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:36:42,231 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 172 [2021-11-25 20:36:42,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:36:42,310 INFO L225 Difference]: With dead ends: 14636 [2021-11-25 20:36:42,310 INFO L226 Difference]: Without dead ends: 9389 [2021-11-25 20:36:42,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:36:42,345 INFO L933 BasicCegarLoop]: 2677 mSDtfsCounter, 1689 mSDsluCounter, 2060 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 29 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1689 SdHoareTripleChecker+Valid, 4456 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:36:42,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1689 Valid, 4456 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 800 Invalid, 1 Unknown, 0 Unchecked, 7.6s Time] [2021-11-25 20:36:42,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9389 states. [2021-11-25 20:36:43,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9389 to 9356. [2021-11-25 20:36:43,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9356 states, 5429 states have (on average 1.2319027445201696) internal successors, (6688), 5565 states have internal predecessors, (6688), 3095 states have call successors, (3095), 834 states have call predecessors, (3095), 829 states have return successors, (3162), 3032 states have call predecessors, (3162), 3092 states have call successors, (3162) [2021-11-25 20:36:43,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9356 states to 9356 states and 12945 transitions. [2021-11-25 20:36:43,178 INFO L78 Accepts]: Start accepts. Automaton has 9356 states and 12945 transitions. Word has length 172 [2021-11-25 20:36:43,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:36:43,180 INFO L470 AbstractCegarLoop]: Abstraction has 9356 states and 12945 transitions. [2021-11-25 20:36:43,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-25 20:36:43,182 INFO L276 IsEmpty]: Start isEmpty. Operand 9356 states and 12945 transitions. [2021-11-25 20:36:43,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-25 20:36:43,187 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:36:43,187 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 4, 4, 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] [2021-11-25 20:36:43,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 20:36:43,188 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:36:43,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:36:43,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1259576364, now seen corresponding path program 1 times [2021-11-25 20:36:43,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:36:43,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212631102] [2021-11-25 20:36:43,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:36:43,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:36:43,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:36:44,362 INFO L134 CoverageAnalysis]: Checked inductivity of 763 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 763 trivial. 0 not checked. [2021-11-25 20:36:44,362 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:36:44,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212631102] [2021-11-25 20:36:44,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212631102] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:36:44,363 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:36:44,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:36:44,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214836379] [2021-11-25 20:36:44,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:36:44,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:36:44,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:36:44,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:36:44,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:36:44,365 INFO L87 Difference]: Start difference. First operand 9356 states and 12945 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-25 20:36:46,485 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:36:51,124 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:36:53,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:36:53,634 INFO L93 Difference]: Finished difference Result 9512 states and 13083 transitions. [2021-11-25 20:36:53,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:36:53,635 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 185 [2021-11-25 20:36:53,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:36:53,704 INFO L225 Difference]: With dead ends: 9512 [2021-11-25 20:36:53,704 INFO L226 Difference]: Without dead ends: 9510 [2021-11-25 20:36:53,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:36:53,711 INFO L933 BasicCegarLoop]: 1850 mSDtfsCounter, 2078 mSDsluCounter, 4360 mSDsCounter, 0 mSdLazyCounter, 971 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2089 SdHoareTripleChecker+Valid, 5574 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 971 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2021-11-25 20:36:53,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2089 Valid, 5574 Invalid, 974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 971 Invalid, 1 Unknown, 0 Unchecked, 8.9s Time] [2021-11-25 20:36:53,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9510 states. [2021-11-25 20:36:54,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9510 to 9508. [2021-11-25 20:36:54,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9508 states, 5518 states have (on average 1.230699528814788) internal successors, (6791), 5662 states have internal predecessors, (6791), 3111 states have call successors, (3111), 881 states have call predecessors, (3111), 876 states have return successors, (3178), 3048 states have call predecessors, (3178), 3108 states have call successors, (3178) [2021-11-25 20:36:54,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9508 states to 9508 states and 13080 transitions. [2021-11-25 20:36:54,199 INFO L78 Accepts]: Start accepts. Automaton has 9508 states and 13080 transitions. Word has length 185 [2021-11-25 20:36:54,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:36:54,203 INFO L470 AbstractCegarLoop]: Abstraction has 9508 states and 13080 transitions. [2021-11-25 20:36:54,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-25 20:36:54,203 INFO L276 IsEmpty]: Start isEmpty. Operand 9508 states and 13080 transitions. [2021-11-25 20:36:54,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-25 20:36:54,210 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:36:54,210 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 4, 4, 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] [2021-11-25 20:36:54,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 20:36:54,211 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:36:54,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:36:54,212 INFO L85 PathProgramCache]: Analyzing trace with hash 111996600, now seen corresponding path program 1 times [2021-11-25 20:36:54,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:36:54,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679297910] [2021-11-25 20:36:54,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:36:54,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:36:54,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:36:55,397 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 763 trivial. 0 not checked. [2021-11-25 20:36:55,397 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:36:55,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679297910] [2021-11-25 20:36:55,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679297910] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:36:55,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:36:55,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:36:55,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049429093] [2021-11-25 20:36:55,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:36:55,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:36:55,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:36:55,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:36:55,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:36:55,399 INFO L87 Difference]: Start difference. First operand 9508 states and 13080 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-25 20:36:57,512 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:37:01,867 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:37:03,887 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:37:05,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:37:05,726 INFO L93 Difference]: Finished difference Result 9514 states and 13085 transitions. [2021-11-25 20:37:05,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:37:05,727 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 190 [2021-11-25 20:37:05,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:37:05,776 INFO L225 Difference]: With dead ends: 9514 [2021-11-25 20:37:05,776 INFO L226 Difference]: Without dead ends: 9512 [2021-11-25 20:37:05,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:37:05,783 INFO L933 BasicCegarLoop]: 1832 mSDtfsCounter, 2091 mSDsluCounter, 4273 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2101 SdHoareTripleChecker+Valid, 5477 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:37:05,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2101 Valid, 5477 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 960 Invalid, 2 Unknown, 0 Unchecked, 10.0s Time] [2021-11-25 20:37:05,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9512 states. [2021-11-25 20:37:06,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9512 to 9512. [2021-11-25 20:37:06,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9512 states, 5521 states have (on average 1.2305741713457707) internal successors, (6794), 5665 states have internal predecessors, (6794), 3111 states have call successors, (3111), 882 states have call predecessors, (3111), 877 states have return successors, (3178), 3048 states have call predecessors, (3178), 3108 states have call successors, (3178) [2021-11-25 20:37:06,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9512 states to 9512 states and 13083 transitions. [2021-11-25 20:37:06,260 INFO L78 Accepts]: Start accepts. Automaton has 9512 states and 13083 transitions. Word has length 190 [2021-11-25 20:37:06,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:37:06,261 INFO L470 AbstractCegarLoop]: Abstraction has 9512 states and 13083 transitions. [2021-11-25 20:37:06,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-25 20:37:06,261 INFO L276 IsEmpty]: Start isEmpty. Operand 9512 states and 13083 transitions. [2021-11-25 20:37:06,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-11-25 20:37:06,268 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:37:06,268 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 6, 6, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:37:06,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 20:37:06,269 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:37:06,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:37:06,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1638301850, now seen corresponding path program 1 times [2021-11-25 20:37:06,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:37:06,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286547336] [2021-11-25 20:37:06,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:37:06,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:37:06,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:37:07,251 INFO L134 CoverageAnalysis]: Checked inductivity of 797 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 793 trivial. 0 not checked. [2021-11-25 20:37:07,251 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:37:07,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286547336] [2021-11-25 20:37:07,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286547336] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:37:07,252 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:37:07,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:37:07,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217403067] [2021-11-25 20:37:07,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:37:07,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:37:07,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:37:07,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:37:07,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:37:07,253 INFO L87 Difference]: Start difference. First operand 9512 states and 13083 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-25 20:37:09,466 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:37:16,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:37:16,131 INFO L93 Difference]: Finished difference Result 9518 states and 13088 transitions. [2021-11-25 20:37:16,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:37:16,131 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 204 [2021-11-25 20:37:16,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:37:16,174 INFO L225 Difference]: With dead ends: 9518 [2021-11-25 20:37:16,174 INFO L226 Difference]: Without dead ends: 9516 [2021-11-25 20:37:16,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:37:16,181 INFO L933 BasicCegarLoop]: 1832 mSDtfsCounter, 2087 mSDsluCounter, 4273 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2096 SdHoareTripleChecker+Valid, 5477 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:37:16,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2096 Valid, 5477 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 961 Invalid, 1 Unknown, 0 Unchecked, 8.6s Time] [2021-11-25 20:37:16,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9516 states. [2021-11-25 20:37:16,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9516 to 9516. [2021-11-25 20:37:16,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9516 states, 5524 states have (on average 1.2304489500362057) internal successors, (6797), 5668 states have internal predecessors, (6797), 3111 states have call successors, (3111), 883 states have call predecessors, (3111), 878 states have return successors, (3178), 3048 states have call predecessors, (3178), 3108 states have call successors, (3178) [2021-11-25 20:37:16,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9516 states to 9516 states and 13086 transitions. [2021-11-25 20:37:16,705 INFO L78 Accepts]: Start accepts. Automaton has 9516 states and 13086 transitions. Word has length 204 [2021-11-25 20:37:16,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:37:16,706 INFO L470 AbstractCegarLoop]: Abstraction has 9516 states and 13086 transitions. [2021-11-25 20:37:16,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-25 20:37:16,707 INFO L276 IsEmpty]: Start isEmpty. Operand 9516 states and 13086 transitions. [2021-11-25 20:37:16,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-25 20:37:16,713 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:37:16,713 INFO L514 BasicCegarLoop]: trace histogram [15, 13, 13, 13, 13, 13, 13, 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] [2021-11-25 20:37:16,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 20:37:16,714 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:37:16,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:37:16,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1933538667, now seen corresponding path program 1 times [2021-11-25 20:37:16,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:37:16,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145485826] [2021-11-25 20:37:16,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:37:16,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:37:17,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:37:17,555 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 678 trivial. 0 not checked. [2021-11-25 20:37:17,555 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:37:17,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145485826] [2021-11-25 20:37:17,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145485826] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:37:17,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:37:17,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:37:17,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659363439] [2021-11-25 20:37:17,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:37:17,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:37:17,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:37:17,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:37:17,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:37:17,557 INFO L87 Difference]: Start difference. First operand 9516 states and 13086 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2021-11-25 20:37:19,670 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:37:25,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:37:25,815 INFO L93 Difference]: Finished difference Result 18338 states and 25215 transitions. [2021-11-25 20:37:25,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:37:25,824 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 192 [2021-11-25 20:37:25,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:37:25,867 INFO L225 Difference]: With dead ends: 18338 [2021-11-25 20:37:25,868 INFO L226 Difference]: Without dead ends: 8849 [2021-11-25 20:37:25,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:37:25,910 INFO L933 BasicCegarLoop]: 3417 mSDtfsCounter, 2024 mSDsluCounter, 2110 mSDsCounter, 0 mSdLazyCounter, 920 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2024 SdHoareTripleChecker+Valid, 5225 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 920 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2021-11-25 20:37:25,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2024 Valid, 5225 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 920 Invalid, 1 Unknown, 0 Unchecked, 7.9s Time] [2021-11-25 20:37:25,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8849 states. [2021-11-25 20:37:26,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8849 to 8809. [2021-11-25 20:37:26,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8809 states, 5179 states have (on average 1.229194825255841) internal successors, (6366), 5316 states have internal predecessors, (6366), 2819 states have call successors, (2819), 812 states have call predecessors, (2819), 808 states have return successors, (2884), 2757 states have call predecessors, (2884), 2816 states have call successors, (2884) [2021-11-25 20:37:26,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8809 states to 8809 states and 12069 transitions. [2021-11-25 20:37:26,520 INFO L78 Accepts]: Start accepts. Automaton has 8809 states and 12069 transitions. Word has length 192 [2021-11-25 20:37:26,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:37:26,520 INFO L470 AbstractCegarLoop]: Abstraction has 8809 states and 12069 transitions. [2021-11-25 20:37:26,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2021-11-25 20:37:26,521 INFO L276 IsEmpty]: Start isEmpty. Operand 8809 states and 12069 transitions. [2021-11-25 20:37:26,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-25 20:37:26,526 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:37:26,526 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:37:26,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 20:37:26,527 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:37:26,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:37:26,528 INFO L85 PathProgramCache]: Analyzing trace with hash 251647736, now seen corresponding path program 1 times [2021-11-25 20:37:26,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:37:26,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051640622] [2021-11-25 20:37:26,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:37:26,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:37:27,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:37:27,480 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2021-11-25 20:37:27,480 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:37:27,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051640622] [2021-11-25 20:37:27,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051640622] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:37:27,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:37:27,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:37:27,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284869930] [2021-11-25 20:37:27,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:37:27,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:37:27,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:37:27,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:37:27,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:37:27,482 INFO L87 Difference]: Start difference. First operand 8809 states and 12069 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-25 20:37:29,598 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:37:34,569 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:37:36,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:37:36,872 INFO L93 Difference]: Finished difference Result 8815 states and 12074 transitions. [2021-11-25 20:37:36,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:37:36,879 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 200 [2021-11-25 20:37:36,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:37:36,912 INFO L225 Difference]: With dead ends: 8815 [2021-11-25 20:37:36,912 INFO L226 Difference]: Without dead ends: 8813 [2021-11-25 20:37:36,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:37:36,918 INFO L933 BasicCegarLoop]: 1832 mSDtfsCounter, 2091 mSDsluCounter, 4273 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2099 SdHoareTripleChecker+Valid, 5477 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:37:36,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2099 Valid, 5477 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 961 Invalid, 1 Unknown, 0 Unchecked, 9.0s Time] [2021-11-25 20:37:36,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8813 states. [2021-11-25 20:37:37,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8813 to 8813. [2021-11-25 20:37:37,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8813 states, 5182 states have (on average 1.2290621381705904) internal successors, (6369), 5319 states have internal predecessors, (6369), 2819 states have call successors, (2819), 813 states have call predecessors, (2819), 809 states have return successors, (2884), 2757 states have call predecessors, (2884), 2816 states have call successors, (2884) [2021-11-25 20:37:37,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8813 states to 8813 states and 12072 transitions. [2021-11-25 20:37:37,389 INFO L78 Accepts]: Start accepts. Automaton has 8813 states and 12072 transitions. Word has length 200 [2021-11-25 20:37:37,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:37:37,391 INFO L470 AbstractCegarLoop]: Abstraction has 8813 states and 12072 transitions. [2021-11-25 20:37:37,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-25 20:37:37,391 INFO L276 IsEmpty]: Start isEmpty. Operand 8813 states and 12072 transitions. [2021-11-25 20:37:37,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-11-25 20:37:37,396 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:37:37,396 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 6, 6, 5, 4, 4, 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] [2021-11-25 20:37:37,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 20:37:37,397 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:37:37,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:37:37,397 INFO L85 PathProgramCache]: Analyzing trace with hash -753480102, now seen corresponding path program 1 times [2021-11-25 20:37:37,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:37:37,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756636741] [2021-11-25 20:37:37,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:37:37,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:37:38,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:37:38,586 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 813 trivial. 0 not checked. [2021-11-25 20:37:38,586 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:37:38,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756636741] [2021-11-25 20:37:38,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756636741] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:37:38,586 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:37:38,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:37:38,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305692569] [2021-11-25 20:37:38,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:37:38,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:37:38,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:37:38,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:37:38,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:37:38,588 INFO L87 Difference]: Start difference. First operand 8813 states and 12072 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-25 20:37:40,702 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:37:46,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:37:46,251 INFO L93 Difference]: Finished difference Result 8819 states and 12077 transitions. [2021-11-25 20:37:46,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:37:46,252 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 214 [2021-11-25 20:37:46,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:37:46,276 INFO L225 Difference]: With dead ends: 8819 [2021-11-25 20:37:46,276 INFO L226 Difference]: Without dead ends: 8817 [2021-11-25 20:37:46,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:37:46,280 INFO L933 BasicCegarLoop]: 1832 mSDtfsCounter, 2087 mSDsluCounter, 4273 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2094 SdHoareTripleChecker+Valid, 5477 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:37:46,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2094 Valid, 5477 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 961 Invalid, 1 Unknown, 0 Unchecked, 7.3s Time] [2021-11-25 20:37:46,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8817 states. [2021-11-25 20:37:46,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8817 to 8817. [2021-11-25 20:37:46,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8817 states, 5185 states have (on average 1.2289296046287368) internal successors, (6372), 5322 states have internal predecessors, (6372), 2819 states have call successors, (2819), 814 states have call predecessors, (2819), 810 states have return successors, (2884), 2757 states have call predecessors, (2884), 2816 states have call successors, (2884) [2021-11-25 20:37:46,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8817 states to 8817 states and 12075 transitions. [2021-11-25 20:37:46,752 INFO L78 Accepts]: Start accepts. Automaton has 8817 states and 12075 transitions. Word has length 214 [2021-11-25 20:37:46,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:37:46,752 INFO L470 AbstractCegarLoop]: Abstraction has 8817 states and 12075 transitions. [2021-11-25 20:37:46,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-25 20:37:46,753 INFO L276 IsEmpty]: Start isEmpty. Operand 8817 states and 12075 transitions. [2021-11-25 20:37:46,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-25 20:37:46,757 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:37:46,758 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 6, 5, 5, 4, 4, 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] [2021-11-25 20:37:46,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 20:37:46,758 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:37:46,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:37:46,759 INFO L85 PathProgramCache]: Analyzing trace with hash -160489672, now seen corresponding path program 1 times [2021-11-25 20:37:46,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:37:46,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245125235] [2021-11-25 20:37:46,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:37:46,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:37:47,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:37:47,779 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 803 trivial. 0 not checked. [2021-11-25 20:37:47,779 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:37:47,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245125235] [2021-11-25 20:37:47,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245125235] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:37:47,779 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:37:47,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:37:47,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33938899] [2021-11-25 20:37:47,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:37:47,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:37:47,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:37:47,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:37:47,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:37:47,781 INFO L87 Difference]: Start difference. First operand 8817 states and 12075 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-25 20:37:49,876 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:37:54,312 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:37:55,521 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:37:57,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:37:57,317 INFO L93 Difference]: Finished difference Result 8823 states and 12080 transitions. [2021-11-25 20:37:57,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:37:57,318 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 210 [2021-11-25 20:37:57,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:37:57,340 INFO L225 Difference]: With dead ends: 8823 [2021-11-25 20:37:57,340 INFO L226 Difference]: Without dead ends: 8821 [2021-11-25 20:37:57,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:37:57,345 INFO L933 BasicCegarLoop]: 1832 mSDtfsCounter, 2091 mSDsluCounter, 4273 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2097 SdHoareTripleChecker+Valid, 5477 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:37:57,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2097 Valid, 5477 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 961 Invalid, 1 Unknown, 0 Unchecked, 9.2s Time] [2021-11-25 20:37:57,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8821 states. [2021-11-25 20:37:57,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8821 to 8821. [2021-11-25 20:37:57,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8821 states, 5188 states have (on average 1.2287972243639167) internal successors, (6375), 5325 states have internal predecessors, (6375), 2819 states have call successors, (2819), 815 states have call predecessors, (2819), 811 states have return successors, (2884), 2757 states have call predecessors, (2884), 2816 states have call successors, (2884) [2021-11-25 20:37:57,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8821 states to 8821 states and 12078 transitions. [2021-11-25 20:37:57,826 INFO L78 Accepts]: Start accepts. Automaton has 8821 states and 12078 transitions. Word has length 210 [2021-11-25 20:37:57,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:37:57,827 INFO L470 AbstractCegarLoop]: Abstraction has 8821 states and 12078 transitions. [2021-11-25 20:37:57,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-25 20:37:57,827 INFO L276 IsEmpty]: Start isEmpty. Operand 8821 states and 12078 transitions. [2021-11-25 20:37:57,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-11-25 20:37:57,832 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:37:57,833 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 7, 6, 6, 6, 6, 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] [2021-11-25 20:37:57,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 20:37:57,833 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:37:57,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:37:57,834 INFO L85 PathProgramCache]: Analyzing trace with hash -800941030, now seen corresponding path program 1 times [2021-11-25 20:37:57,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:37:57,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452715098] [2021-11-25 20:37:57,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:37:57,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:37:58,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:37:58,754 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2021-11-25 20:37:58,754 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:37:58,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452715098] [2021-11-25 20:37:58,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452715098] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:37:58,755 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:37:58,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:37:58,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104935531] [2021-11-25 20:37:58,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:37:58,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:37:58,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:37:58,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:37:58,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:37:58,757 INFO L87 Difference]: Start difference. First operand 8821 states and 12078 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-25 20:38:00,865 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:38:06,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:38:06,770 INFO L93 Difference]: Finished difference Result 8827 states and 12083 transitions. [2021-11-25 20:38:06,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:38:06,771 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 224 [2021-11-25 20:38:06,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:38:06,791 INFO L225 Difference]: With dead ends: 8827 [2021-11-25 20:38:06,791 INFO L226 Difference]: Without dead ends: 8825 [2021-11-25 20:38:06,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:38:06,797 INFO L933 BasicCegarLoop]: 1832 mSDtfsCounter, 2087 mSDsluCounter, 4273 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2092 SdHoareTripleChecker+Valid, 5477 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:38:06,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2092 Valid, 5477 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 961 Invalid, 1 Unknown, 0 Unchecked, 7.5s Time] [2021-11-25 20:38:06,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8825 states. [2021-11-25 20:38:07,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8825 to 8825. [2021-11-25 20:38:07,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8825 states, 5191 states have (on average 1.2286649971103834) internal successors, (6378), 5328 states have internal predecessors, (6378), 2819 states have call successors, (2819), 816 states have call predecessors, (2819), 812 states have return successors, (2884), 2757 states have call predecessors, (2884), 2816 states have call successors, (2884) [2021-11-25 20:38:07,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8825 states to 8825 states and 12081 transitions. [2021-11-25 20:38:07,261 INFO L78 Accepts]: Start accepts. Automaton has 8825 states and 12081 transitions. Word has length 224 [2021-11-25 20:38:07,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:38:07,262 INFO L470 AbstractCegarLoop]: Abstraction has 8825 states and 12081 transitions. [2021-11-25 20:38:07,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-25 20:38:07,262 INFO L276 IsEmpty]: Start isEmpty. Operand 8825 states and 12081 transitions. [2021-11-25 20:38:07,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-11-25 20:38:07,268 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:38:07,268 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 8, 7, 7, 4, 4, 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] [2021-11-25 20:38:07,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 20:38:07,268 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:38:07,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:38:07,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1292027768, now seen corresponding path program 1 times [2021-11-25 20:38:07,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:38:07,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083063893] [2021-11-25 20:38:07,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:38:07,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:38:07,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:38:08,245 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2021-11-25 20:38:08,245 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:38:08,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083063893] [2021-11-25 20:38:08,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083063893] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:38:08,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:38:08,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:38:08,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169380582] [2021-11-25 20:38:08,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:38:08,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:38:08,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:38:08,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:38:08,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:38:08,247 INFO L87 Difference]: Start difference. First operand 8825 states and 12081 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-25 20:38:10,330 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:38:16,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:38:16,224 INFO L93 Difference]: Finished difference Result 8831 states and 12086 transitions. [2021-11-25 20:38:16,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:38:16,224 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 220 [2021-11-25 20:38:16,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:38:16,247 INFO L225 Difference]: With dead ends: 8831 [2021-11-25 20:38:16,247 INFO L226 Difference]: Without dead ends: 8829 [2021-11-25 20:38:16,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:38:16,251 INFO L933 BasicCegarLoop]: 1832 mSDtfsCounter, 2091 mSDsluCounter, 4273 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2095 SdHoareTripleChecker+Valid, 5477 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:38:16,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2095 Valid, 5477 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 961 Invalid, 1 Unknown, 0 Unchecked, 7.6s Time] [2021-11-25 20:38:16,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8829 states. [2021-11-25 20:38:16,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8829 to 8829. [2021-11-25 20:38:16,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8829 states, 5194 states have (on average 1.2285329226030035) internal successors, (6381), 5331 states have internal predecessors, (6381), 2819 states have call successors, (2819), 817 states have call predecessors, (2819), 813 states have return successors, (2884), 2757 states have call predecessors, (2884), 2816 states have call successors, (2884) [2021-11-25 20:38:16,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8829 states to 8829 states and 12084 transitions. [2021-11-25 20:38:16,795 INFO L78 Accepts]: Start accepts. Automaton has 8829 states and 12084 transitions. Word has length 220 [2021-11-25 20:38:16,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:38:16,796 INFO L470 AbstractCegarLoop]: Abstraction has 8829 states and 12084 transitions. [2021-11-25 20:38:16,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-25 20:38:16,796 INFO L276 IsEmpty]: Start isEmpty. Operand 8829 states and 12084 transitions. [2021-11-25 20:38:16,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-11-25 20:38:16,802 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:38:16,802 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 9, 8, 8, 6, 6, 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] [2021-11-25 20:38:16,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-25 20:38:16,803 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:38:16,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:38:16,803 INFO L85 PathProgramCache]: Analyzing trace with hash -2067142182, now seen corresponding path program 1 times [2021-11-25 20:38:16,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:38:16,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490389996] [2021-11-25 20:38:16,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:38:16,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:38:17,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:38:17,717 INFO L134 CoverageAnalysis]: Checked inductivity of 917 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 901 trivial. 0 not checked. [2021-11-25 20:38:17,717 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:38:17,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490389996] [2021-11-25 20:38:17,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490389996] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:38:17,717 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:38:17,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:38:17,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638342193] [2021-11-25 20:38:17,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:38:17,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:38:17,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:38:17,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:38:17,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:38:17,719 INFO L87 Difference]: Start difference. First operand 8829 states and 12084 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-25 20:38:19,836 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:38:26,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:38:26,222 INFO L93 Difference]: Finished difference Result 8835 states and 12089 transitions. [2021-11-25 20:38:26,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:38:26,223 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) Word has length 234 [2021-11-25 20:38:26,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:38:26,245 INFO L225 Difference]: With dead ends: 8835 [2021-11-25 20:38:26,245 INFO L226 Difference]: Without dead ends: 8833 [2021-11-25 20:38:26,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:38:26,249 INFO L933 BasicCegarLoop]: 1832 mSDtfsCounter, 2087 mSDsluCounter, 4273 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2090 SdHoareTripleChecker+Valid, 5477 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:38:26,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2090 Valid, 5477 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 961 Invalid, 1 Unknown, 0 Unchecked, 8.1s Time] [2021-11-25 20:38:26,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8833 states. [2021-11-25 20:38:26,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8833 to 8833. [2021-11-25 20:38:26,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8833 states, 5197 states have (on average 1.228401000577256) internal successors, (6384), 5334 states have internal predecessors, (6384), 2819 states have call successors, (2819), 818 states have call predecessors, (2819), 814 states have return successors, (2884), 2757 states have call predecessors, (2884), 2816 states have call successors, (2884) [2021-11-25 20:38:26,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8833 states to 8833 states and 12087 transitions. [2021-11-25 20:38:26,730 INFO L78 Accepts]: Start accepts. Automaton has 8833 states and 12087 transitions. Word has length 234 [2021-11-25 20:38:26,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:38:26,730 INFO L470 AbstractCegarLoop]: Abstraction has 8833 states and 12087 transitions. [2021-11-25 20:38:26,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-25 20:38:26,730 INFO L276 IsEmpty]: Start isEmpty. Operand 8833 states and 12087 transitions. [2021-11-25 20:38:26,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-11-25 20:38:26,735 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:38:26,736 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 10, 9, 9, 4, 4, 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] [2021-11-25 20:38:26,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-25 20:38:26,736 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:38:26,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:38:26,737 INFO L85 PathProgramCache]: Analyzing trace with hash 952291256, now seen corresponding path program 1 times [2021-11-25 20:38:26,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:38:26,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43614295] [2021-11-25 20:38:26,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:38:26,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:38:27,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:38:27,594 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 907 trivial. 0 not checked. [2021-11-25 20:38:27,594 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:38:27,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43614295] [2021-11-25 20:38:27,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43614295] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:38:27,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:38:27,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:38:27,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960634369] [2021-11-25 20:38:27,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:38:27,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:38:27,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:38:27,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:38:27,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:38:27,597 INFO L87 Difference]: Start difference. First operand 8833 states and 12087 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-25 20:38:29,698 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:38:35,117 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:38:36,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:38:36,767 INFO L93 Difference]: Finished difference Result 8839 states and 12092 transitions. [2021-11-25 20:38:36,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:38:36,768 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 230 [2021-11-25 20:38:36,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:38:36,795 INFO L225 Difference]: With dead ends: 8839 [2021-11-25 20:38:36,795 INFO L226 Difference]: Without dead ends: 8837 [2021-11-25 20:38:36,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:38:36,799 INFO L933 BasicCegarLoop]: 1832 mSDtfsCounter, 2091 mSDsluCounter, 4273 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2093 SdHoareTripleChecker+Valid, 5477 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2021-11-25 20:38:36,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2093 Valid, 5477 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 961 Invalid, 1 Unknown, 0 Unchecked, 8.7s Time] [2021-11-25 20:38:36,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8837 states. [2021-11-25 20:38:37,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8837 to 8837. [2021-11-25 20:38:37,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8837 states, 5200 states have (on average 1.2282692307692307) internal successors, (6387), 5337 states have internal predecessors, (6387), 2819 states have call successors, (2819), 819 states have call predecessors, (2819), 815 states have return successors, (2884), 2757 states have call predecessors, (2884), 2816 states have call successors, (2884) [2021-11-25 20:38:37,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8837 states to 8837 states and 12090 transitions. [2021-11-25 20:38:37,299 INFO L78 Accepts]: Start accepts. Automaton has 8837 states and 12090 transitions. Word has length 230 [2021-11-25 20:38:37,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:38:37,299 INFO L470 AbstractCegarLoop]: Abstraction has 8837 states and 12090 transitions. [2021-11-25 20:38:37,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-25 20:38:37,300 INFO L276 IsEmpty]: Start isEmpty. Operand 8837 states and 12090 transitions. [2021-11-25 20:38:37,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-11-25 20:38:37,304 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:38:37,304 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 11, 10, 10, 4, 4, 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] [2021-11-25 20:38:37,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-25 20:38:37,304 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:38:37,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:38:37,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1165092972, now seen corresponding path program 1 times [2021-11-25 20:38:37,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:38:37,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093053017] [2021-11-25 20:38:37,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:38:37,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:38:37,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:38:38,055 INFO L134 CoverageAnalysis]: Checked inductivity of 963 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 943 trivial. 0 not checked. [2021-11-25 20:38:38,055 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:38:38,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093053017] [2021-11-25 20:38:38,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093053017] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:38:38,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:38:38,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:38:38,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423680743] [2021-11-25 20:38:38,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:38:38,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:38:38,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:38:38,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:38:38,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:38:38,058 INFO L87 Difference]: Start difference. First operand 8837 states and 12090 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-25 20:38:40,141 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:38:45,287 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:38:48,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:38:48,241 INFO L93 Difference]: Finished difference Result 8881 states and 12120 transitions. [2021-11-25 20:38:48,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:38:48,242 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) Word has length 235 [2021-11-25 20:38:48,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:38:48,263 INFO L225 Difference]: With dead ends: 8881 [2021-11-25 20:38:48,263 INFO L226 Difference]: Without dead ends: 8877 [2021-11-25 20:38:48,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:38:48,268 INFO L933 BasicCegarLoop]: 1832 mSDtfsCounter, 2044 mSDsluCounter, 4327 mSDsCounter, 0 mSdLazyCounter, 965 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2045 SdHoareTripleChecker+Valid, 5528 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 965 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2021-11-25 20:38:48,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2045 Valid, 5528 Invalid, 968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 965 Invalid, 1 Unknown, 0 Unchecked, 9.7s Time] [2021-11-25 20:38:48,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8877 states. [2021-11-25 20:38:48,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8877 to 8875. [2021-11-25 20:38:48,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8875 states, 5224 states have (on average 1.2274119448698315) internal successors, (6412), 5360 states have internal predecessors, (6412), 2819 states have call successors, (2819), 834 states have call predecessors, (2819), 829 states have return successors, (2884), 2757 states have call predecessors, (2884), 2816 states have call successors, (2884) [2021-11-25 20:38:48,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8875 states to 8875 states and 12115 transitions. [2021-11-25 20:38:48,780 INFO L78 Accepts]: Start accepts. Automaton has 8875 states and 12115 transitions. Word has length 235 [2021-11-25 20:38:48,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:38:48,780 INFO L470 AbstractCegarLoop]: Abstraction has 8875 states and 12115 transitions. [2021-11-25 20:38:48,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-25 20:38:48,781 INFO L276 IsEmpty]: Start isEmpty. Operand 8875 states and 12115 transitions. [2021-11-25 20:38:48,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-11-25 20:38:48,787 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:38:48,787 INFO L514 BasicCegarLoop]: trace histogram [18, 13, 13, 13, 13, 13, 13, 5, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:38:48,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-25 20:38:48,788 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)] === [2021-11-25 20:38:48,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:38:48,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1384600938, now seen corresponding path program 1 times [2021-11-25 20:38:48,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:38:48,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899229126] [2021-11-25 20:38:48,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:38:48,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:38:49,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:38:49,597 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2021-11-25 20:38:49,597 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:38:49,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899229126] [2021-11-25 20:38:49,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899229126] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:38:49,597 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:38:49,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:38:49,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448484249] [2021-11-25 20:38:49,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:38:49,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:38:49,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:38:49,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:38:49,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:38:49,599 INFO L87 Difference]: Start difference. First operand 8875 states and 12115 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-25 20:38:51,715 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:38:58,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:38:58,206 INFO L93 Difference]: Finished difference Result 21453 states and 29334 transitions. [2021-11-25 20:38:58,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:38:58,210 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) Word has length 235 [2021-11-25 20:38:58,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:38:58,259 INFO L225 Difference]: With dead ends: 21453 [2021-11-25 20:38:58,259 INFO L226 Difference]: Without dead ends: 12756 [2021-11-25 20:38:58,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:38:58,297 INFO L933 BasicCegarLoop]: 3526 mSDtfsCounter, 2021 mSDsluCounter, 2106 mSDsCounter, 0 mSdLazyCounter, 954 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2021 SdHoareTripleChecker+Valid, 5330 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 954 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:38:58,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2021 Valid, 5330 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 954 Invalid, 1 Unknown, 0 Unchecked, 8.0s Time] [2021-11-25 20:38:58,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12756 states. [2021-11-25 20:38:58,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12756 to 12686. [2021-11-25 20:38:58,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12686 states, 7483 states have (on average 1.2289188828010156) internal successors, (9196), 7679 states have internal predecessors, (9196), 4019 states have call successors, (4019), 1187 states have call predecessors, (4019), 1181 states have return successors, (4117), 3931 states have call predecessors, (4117), 4016 states have call successors, (4117) [2021-11-25 20:38:59,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12686 states to 12686 states and 17332 transitions. [2021-11-25 20:38:59,010 INFO L78 Accepts]: Start accepts. Automaton has 12686 states and 17332 transitions. Word has length 235 [2021-11-25 20:38:59,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:38:59,011 INFO L470 AbstractCegarLoop]: Abstraction has 12686 states and 17332 transitions. [2021-11-25 20:38:59,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-25 20:38:59,011 INFO L276 IsEmpty]: Start isEmpty. Operand 12686 states and 17332 transitions. [2021-11-25 20:38:59,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-11-25 20:38:59,016 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:38:59,016 INFO L514 BasicCegarLoop]: trace histogram [17, 13, 13, 13, 13, 13, 13, 12, 11, 11, 6, 6, 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] [2021-11-25 20:38:59,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-25 20:38:59,016 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:38:59,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:38:59,017 INFO L85 PathProgramCache]: Analyzing trace with hash -389761654, now seen corresponding path program 1 times [2021-11-25 20:38:59,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:38:59,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697918494] [2021-11-25 20:38:59,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:38:59,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:38:59,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:38:59,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 1009 trivial. 0 not checked. [2021-11-25 20:38:59,882 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:38:59,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697918494] [2021-11-25 20:38:59,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697918494] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:38:59,882 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:38:59,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:38:59,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966388994] [2021-11-25 20:38:59,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:38:59,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:38:59,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:38:59,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:38:59,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:38:59,884 INFO L87 Difference]: Start difference. First operand 12686 states and 17332 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-25 20:39:01,998 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:39:06,980 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:39:08,566 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:39:10,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:39:10,444 INFO L93 Difference]: Finished difference Result 13452 states and 18144 transitions. [2021-11-25 20:39:10,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:39:10,444 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) Word has length 249 [2021-11-25 20:39:10,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:39:10,486 INFO L225 Difference]: With dead ends: 13452 [2021-11-25 20:39:10,486 INFO L226 Difference]: Without dead ends: 13329 [2021-11-25 20:39:10,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:39:10,491 INFO L933 BasicCegarLoop]: 1929 mSDtfsCounter, 2019 mSDsluCounter, 4709 mSDsCounter, 0 mSdLazyCounter, 1050 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2019 SdHoareTripleChecker+Valid, 5938 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1050 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2021-11-25 20:39:10,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2019 Valid, 5938 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1050 Invalid, 1 Unknown, 0 Unchecked, 9.8s Time] [2021-11-25 20:39:10,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13329 states. [2021-11-25 20:39:11,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13329 to 13325. [2021-11-25 20:39:11,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13325 states, 7860 states have (on average 1.2225190839694657) internal successors, (9609), 8032 states have internal predecessors, (9609), 4119 states have call successors, (4119), 1348 states have call predecessors, (4119), 1344 states have return successors, (4220), 4056 states have call predecessors, (4220), 4119 states have call successors, (4220) [2021-11-25 20:39:11,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13325 states to 13325 states and 17948 transitions. [2021-11-25 20:39:11,097 INFO L78 Accepts]: Start accepts. Automaton has 13325 states and 17948 transitions. Word has length 249 [2021-11-25 20:39:11,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:39:11,098 INFO L470 AbstractCegarLoop]: Abstraction has 13325 states and 17948 transitions. [2021-11-25 20:39:11,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-25 20:39:11,098 INFO L276 IsEmpty]: Start isEmpty. Operand 13325 states and 17948 transitions. [2021-11-25 20:39:11,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2021-11-25 20:39:11,105 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:39:11,105 INFO L514 BasicCegarLoop]: trace histogram [20, 13, 13, 13, 13, 13, 13, 7, 7, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:39:11,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-25 20:39:11,106 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:39:11,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:39:11,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1189550655, now seen corresponding path program 1 times [2021-11-25 20:39:11,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:39:11,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137003738] [2021-11-25 20:39:11,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:39:11,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:39:11,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:39:12,124 INFO L134 CoverageAnalysis]: Checked inductivity of 947 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 929 trivial. 0 not checked. [2021-11-25 20:39:12,125 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:39:12,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137003738] [2021-11-25 20:39:12,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137003738] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:39:12,125 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:39:12,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:39:12,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783800116] [2021-11-25 20:39:12,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:39:12,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:39:12,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:39:12,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:39:12,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:39:12,127 INFO L87 Difference]: Start difference. First operand 13325 states and 17948 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) [2021-11-25 20:39:14,236 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:39:20,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:39:20,525 INFO L93 Difference]: Finished difference Result 31010 states and 41873 transitions. [2021-11-25 20:39:20,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:39:20,525 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) Word has length 277 [2021-11-25 20:39:20,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:39:20,571 INFO L225 Difference]: With dead ends: 31010 [2021-11-25 20:39:20,572 INFO L226 Difference]: Without dead ends: 17863 [2021-11-25 20:39:20,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:39:20,600 INFO L933 BasicCegarLoop]: 3183 mSDtfsCounter, 1659 mSDsluCounter, 2016 mSDsCounter, 0 mSdLazyCounter, 943 mSolverCounterSat, 28 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1659 SdHoareTripleChecker+Valid, 4920 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 943 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:39:20,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1659 Valid, 4920 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 943 Invalid, 1 Unknown, 0 Unchecked, 7.6s Time] [2021-11-25 20:39:20,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17863 states. [2021-11-25 20:39:21,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17863 to 17855. [2021-11-25 20:39:21,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17855 states, 10564 states have (on average 1.21932979931844) internal successors, (12881), 10797 states have internal predecessors, (12881), 5496 states have call successors, (5496), 1798 states have call predecessors, (5496), 1793 states have return successors, (5598), 5414 states have call predecessors, (5598), 5496 states have call successors, (5598) [2021-11-25 20:39:21,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17855 states to 17855 states and 23975 transitions. [2021-11-25 20:39:21,703 INFO L78 Accepts]: Start accepts. Automaton has 17855 states and 23975 transitions. Word has length 277 [2021-11-25 20:39:21,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:39:21,704 INFO L470 AbstractCegarLoop]: Abstraction has 17855 states and 23975 transitions. [2021-11-25 20:39:21,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) [2021-11-25 20:39:21,705 INFO L276 IsEmpty]: Start isEmpty. Operand 17855 states and 23975 transitions. [2021-11-25 20:39:21,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2021-11-25 20:39:21,713 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:39:21,713 INFO L514 BasicCegarLoop]: trace histogram [21, 13, 13, 13, 13, 13, 13, 9, 9, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:39:21,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-25 20:39:21,713 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:39:21,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:39:21,714 INFO L85 PathProgramCache]: Analyzing trace with hash -15079952, now seen corresponding path program 1 times [2021-11-25 20:39:21,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:39:21,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751518942] [2021-11-25 20:39:21,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:39:21,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:39:22,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:39:22,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1033 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1033 trivial. 0 not checked. [2021-11-25 20:39:22,924 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:39:22,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751518942] [2021-11-25 20:39:22,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751518942] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:39:22,924 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:39:22,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:39:22,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254136395] [2021-11-25 20:39:22,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:39:22,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:39:22,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:39:22,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:39:22,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:39:22,926 INFO L87 Difference]: Start difference. First operand 17855 states and 23975 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (49), 3 states have call predecessors, (49), 1 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) [2021-11-25 20:39:25,041 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:39:32,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:39:32,258 INFO L93 Difference]: Finished difference Result 17907 states and 24025 transitions. [2021-11-25 20:39:32,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:39:32,259 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (49), 3 states have call predecessors, (49), 1 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) Word has length 321 [2021-11-25 20:39:32,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:39:32,302 INFO L225 Difference]: With dead ends: 17907 [2021-11-25 20:39:32,302 INFO L226 Difference]: Without dead ends: 17905 [2021-11-25 20:39:32,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:39:32,311 INFO L933 BasicCegarLoop]: 1813 mSDtfsCounter, 1986 mSDsluCounter, 4285 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1989 SdHoareTripleChecker+Valid, 5466 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:39:32,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1989 Valid, 5466 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 956 Invalid, 1 Unknown, 0 Unchecked, 8.4s Time] [2021-11-25 20:39:32,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17905 states. [2021-11-25 20:39:33,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17905 to 17903. [2021-11-25 20:39:33,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17903 states, 10600 states have (on average 1.2178301886792453) internal successors, (12909), 10833 states have internal predecessors, (12909), 5496 states have call successors, (5496), 1810 states have call predecessors, (5496), 1805 states have return successors, (5598), 5414 states have call predecessors, (5598), 5496 states have call successors, (5598) [2021-11-25 20:39:33,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17903 states to 17903 states and 24003 transitions. [2021-11-25 20:39:33,240 INFO L78 Accepts]: Start accepts. Automaton has 17903 states and 24003 transitions. Word has length 321 [2021-11-25 20:39:33,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:39:33,241 INFO L470 AbstractCegarLoop]: Abstraction has 17903 states and 24003 transitions. [2021-11-25 20:39:33,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (49), 3 states have call predecessors, (49), 1 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) [2021-11-25 20:39:33,241 INFO L276 IsEmpty]: Start isEmpty. Operand 17903 states and 24003 transitions. [2021-11-25 20:39:33,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-11-25 20:39:33,251 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:39:33,251 INFO L514 BasicCegarLoop]: trace histogram [22, 13, 13, 13, 13, 13, 13, 7, 7, 5, 5, 5, 4, 4, 4, 4, 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] [2021-11-25 20:39:33,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-25 20:39:33,252 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:39:33,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:39:33,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1406325827, now seen corresponding path program 1 times [2021-11-25 20:39:33,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:39:33,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411756342] [2021-11-25 20:39:33,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:39:33,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:39:33,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:39:34,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 1029 trivial. 0 not checked. [2021-11-25 20:39:34,200 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:39:34,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411756342] [2021-11-25 20:39:34,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411756342] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:39:34,200 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:39:34,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:39:34,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504992531] [2021-11-25 20:39:34,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:39:34,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:39:34,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:39:34,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:39:34,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:39:34,202 INFO L87 Difference]: Start difference. First operand 17903 states and 24003 transitions. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 4 states have internal predecessors, (124), 3 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-25 20:39:36,314 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:39:43,947 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:39:45,268 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:39:47,522 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:39:53,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:39:53,349 INFO L93 Difference]: Finished difference Result 39998 states and 53643 transitions. [2021-11-25 20:39:53,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:39:53,349 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 4 states have internal predecessors, (124), 3 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) Word has length 326 [2021-11-25 20:39:53,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:39:53,410 INFO L225 Difference]: With dead ends: 39998 [2021-11-25 20:39:53,411 INFO L226 Difference]: Without dead ends: 22273 [2021-11-25 20:39:53,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:39:53,452 INFO L933 BasicCegarLoop]: 3182 mSDtfsCounter, 1621 mSDsluCounter, 9478 mSDsCounter, 0 mSdLazyCounter, 2023 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1621 SdHoareTripleChecker+Valid, 11285 SdHoareTripleChecker+Invalid, 2026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2023 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.9s IncrementalHoareTripleChecker+Time [2021-11-25 20:39:53,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1621 Valid, 11285 Invalid, 2026 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1 Valid, 2023 Invalid, 2 Unknown, 0 Unchecked, 17.9s Time] [2021-11-25 20:39:53,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22273 states. [2021-11-25 20:39:54,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22273 to 22253. [2021-11-25 20:39:54,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22253 states, 13127 states have (on average 1.2177192046926182) internal successors, (15985), 13421 states have internal predecessors, (15985), 6867 states have call successors, (6867), 2257 states have call predecessors, (6867), 2257 states have return successors, (6976), 6772 states have call predecessors, (6976), 6867 states have call successors, (6976) [2021-11-25 20:39:54,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22253 states to 22253 states and 29828 transitions. [2021-11-25 20:39:54,814 INFO L78 Accepts]: Start accepts. Automaton has 22253 states and 29828 transitions. Word has length 326 [2021-11-25 20:39:54,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:39:54,815 INFO L470 AbstractCegarLoop]: Abstraction has 22253 states and 29828 transitions. [2021-11-25 20:39:54,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 4 states have internal predecessors, (124), 3 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-25 20:39:54,816 INFO L276 IsEmpty]: Start isEmpty. Operand 22253 states and 29828 transitions. [2021-11-25 20:39:54,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2021-11-25 20:39:54,826 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:39:54,827 INFO L514 BasicCegarLoop]: trace histogram [22, 13, 13, 13, 13, 13, 13, 7, 7, 5, 5, 5, 4, 4, 4, 4, 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] [2021-11-25 20:39:54,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-25 20:39:54,827 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:39:54,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:39:54,828 INFO L85 PathProgramCache]: Analyzing trace with hash -803273408, now seen corresponding path program 1 times [2021-11-25 20:39:54,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:39:54,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142071213] [2021-11-25 20:39:54,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:39:54,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:39:55,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:39:56,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 1029 trivial. 0 not checked. [2021-11-25 20:39:56,027 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:39:56,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142071213] [2021-11-25 20:39:56,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142071213] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:39:56,027 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:39:56,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:39:56,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217349998] [2021-11-25 20:39:56,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:39:56,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:39:56,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:39:56,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:39:56,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:39:56,029 INFO L87 Difference]: Start difference. First operand 22253 states and 29828 transitions. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 3 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-25 20:39:58,144 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:40:05,896 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:40:08,852 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:40:14,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:40:14,686 INFO L93 Difference]: Finished difference Result 50908 states and 68333 transitions. [2021-11-25 20:40:14,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:40:14,687 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 3 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) Word has length 327 [2021-11-25 20:40:14,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:40:14,780 INFO L225 Difference]: With dead ends: 50908 [2021-11-25 20:40:14,780 INFO L226 Difference]: Without dead ends: 28833 [2021-11-25 20:40:14,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:40:14,838 INFO L933 BasicCegarLoop]: 3061 mSDtfsCounter, 1749 mSDsluCounter, 9162 mSDsCounter, 0 mSdLazyCounter, 1991 mSolverCounterSat, 22 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1749 SdHoareTripleChecker+Valid, 10914 SdHoareTripleChecker+Invalid, 2014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1991 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:40:14,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1749 Valid, 10914 Invalid, 2014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1991 Invalid, 1 Unknown, 0 Unchecked, 17.1s Time] [2021-11-25 20:40:14,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28833 states. [2021-11-25 20:40:16,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28833 to 28813. [2021-11-25 20:40:16,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28813 states, 16909 states have (on average 1.2126086699390857) internal successors, (20504), 17293 states have internal predecessors, (20504), 8972 states have call successors, (8972), 2927 states have call predecessors, (8972), 2930 states have return successors, (9091), 8847 states have call predecessors, (9091), 8972 states have call successors, (9091) [2021-11-25 20:40:16,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28813 states to 28813 states and 38567 transitions. [2021-11-25 20:40:16,580 INFO L78 Accepts]: Start accepts. Automaton has 28813 states and 38567 transitions. Word has length 327 [2021-11-25 20:40:16,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:40:16,581 INFO L470 AbstractCegarLoop]: Abstraction has 28813 states and 38567 transitions. [2021-11-25 20:40:16,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 3 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-25 20:40:16,581 INFO L276 IsEmpty]: Start isEmpty. Operand 28813 states and 38567 transitions. [2021-11-25 20:40:16,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2021-11-25 20:40:16,590 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:40:16,590 INFO L514 BasicCegarLoop]: trace histogram [22, 13, 13, 13, 13, 13, 13, 7, 7, 5, 5, 5, 4, 4, 4, 4, 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] [2021-11-25 20:40:16,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-25 20:40:16,590 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:40:16,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:40:16,591 INFO L85 PathProgramCache]: Analyzing trace with hash 284382348, now seen corresponding path program 1 times [2021-11-25 20:40:16,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:40:16,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078287207] [2021-11-25 20:40:16,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:40:16,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:40:17,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:40:17,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 1029 trivial. 0 not checked. [2021-11-25 20:40:17,498 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:40:17,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078287207] [2021-11-25 20:40:17,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078287207] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:40:17,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:40:17,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:40:17,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471352807] [2021-11-25 20:40:17,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:40:17,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:40:17,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:40:17,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:40:17,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:40:17,500 INFO L87 Difference]: Start difference. First operand 28813 states and 38567 transitions. Second operand has 5 states, 5 states have (on average 25.2) internal successors, (126), 4 states have internal predecessors, (126), 3 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-25 20:40:19,594 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:40:28,774 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:40:30,687 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:40:32,716 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:40:39,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:40:39,131 INFO L93 Difference]: Finished difference Result 64046 states and 85847 transitions. [2021-11-25 20:40:39,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:40:39,133 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 4 states have internal predecessors, (126), 3 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) Word has length 328 [2021-11-25 20:40:39,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:40:39,254 INFO L225 Difference]: With dead ends: 64046 [2021-11-25 20:40:39,254 INFO L226 Difference]: Without dead ends: 35411 [2021-11-25 20:40:39,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:40:39,324 INFO L933 BasicCegarLoop]: 3277 mSDtfsCounter, 1743 mSDsluCounter, 9677 mSDsCounter, 0 mSdLazyCounter, 2113 mSolverCounterSat, 25 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1743 SdHoareTripleChecker+Valid, 11568 SdHoareTripleChecker+Invalid, 2140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 2113 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:40:39,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1743 Valid, 11568 Invalid, 2140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 2113 Invalid, 2 Unknown, 0 Unchecked, 19.4s Time] [2021-11-25 20:40:39,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35411 states. [2021-11-25 20:40:41,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35411 to 35391. [2021-11-25 20:40:41,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35391 states, 20709 states have (on average 1.209184412574243) internal successors, (25041), 21183 states have internal predecessors, (25041), 11077 states have call successors, (11077), 3597 states have call predecessors, (11077), 3603 states have return successors, (11206), 10922 states have call predecessors, (11206), 11077 states have call successors, (11206) [2021-11-25 20:40:41,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35391 states to 35391 states and 47324 transitions. [2021-11-25 20:40:41,352 INFO L78 Accepts]: Start accepts. Automaton has 35391 states and 47324 transitions. Word has length 328 [2021-11-25 20:40:41,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:40:41,352 INFO L470 AbstractCegarLoop]: Abstraction has 35391 states and 47324 transitions. [2021-11-25 20:40:41,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 4 states have internal predecessors, (126), 3 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-25 20:40:41,352 INFO L276 IsEmpty]: Start isEmpty. Operand 35391 states and 47324 transitions. [2021-11-25 20:40:41,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2021-11-25 20:40:41,363 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:40:41,363 INFO L514 BasicCegarLoop]: trace histogram [22, 13, 13, 13, 13, 13, 13, 7, 7, 5, 5, 5, 4, 4, 4, 4, 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] [2021-11-25 20:40:41,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-25 20:40:41,364 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:40:41,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:40:41,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1213092680, now seen corresponding path program 1 times [2021-11-25 20:40:41,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:40:41,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747067771] [2021-11-25 20:40:41,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:40:41,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:40:41,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:40:42,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 1029 trivial. 0 not checked. [2021-11-25 20:40:42,340 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:40:42,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747067771] [2021-11-25 20:40:42,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747067771] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:40:42,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:40:42,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:40:42,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649420014] [2021-11-25 20:40:42,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:40:42,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:40:42,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:40:42,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:40:42,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:40:42,342 INFO L87 Difference]: Start difference. First operand 35391 states and 47324 transitions. Second operand has 5 states, 5 states have (on average 25.4) internal successors, (127), 4 states have internal predecessors, (127), 3 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-25 20:40:44,464 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:40:51,552 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:40:56,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:40:56,515 INFO L93 Difference]: Finished difference Result 75040 states and 100359 transitions. [2021-11-25 20:40:56,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:40:56,516 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 4 states have internal predecessors, (127), 3 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) Word has length 329 [2021-11-25 20:40:56,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:40:56,676 INFO L225 Difference]: With dead ends: 75040 [2021-11-25 20:40:56,676 INFO L226 Difference]: Without dead ends: 39827 [2021-11-25 20:40:56,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:40:56,761 INFO L933 BasicCegarLoop]: 2308 mSDtfsCounter, 1894 mSDsluCounter, 7056 mSDsCounter, 0 mSdLazyCounter, 1401 mSolverCounterSat, 30 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1898 SdHoareTripleChecker+Valid, 8469 SdHoareTripleChecker+Invalid, 1432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1401 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:40:56,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1898 Valid, 8469 Invalid, 1432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1401 Invalid, 1 Unknown, 0 Unchecked, 11.5s Time] [2021-11-25 20:40:56,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39827 states. [2021-11-25 20:40:58,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39827 to 39819. [2021-11-25 20:40:58,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39819 states, 23278 states have (on average 1.2104562247615775) internal successors, (28177), 23817 states have internal predecessors, (28177), 12470 states have call successors, (12470), 4064 states have call predecessors, (12470), 4069 states have return successors, (12600), 12294 states have call predecessors, (12600), 12470 states have call successors, (12600) [2021-11-25 20:40:59,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39819 states to 39819 states and 53247 transitions. [2021-11-25 20:40:59,179 INFO L78 Accepts]: Start accepts. Automaton has 39819 states and 53247 transitions. Word has length 329 [2021-11-25 20:40:59,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:40:59,179 INFO L470 AbstractCegarLoop]: Abstraction has 39819 states and 53247 transitions. [2021-11-25 20:40:59,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 4 states have internal predecessors, (127), 3 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-25 20:40:59,180 INFO L276 IsEmpty]: Start isEmpty. Operand 39819 states and 53247 transitions. [2021-11-25 20:40:59,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2021-11-25 20:40:59,191 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:40:59,191 INFO L514 BasicCegarLoop]: trace histogram [21, 13, 13, 13, 13, 13, 13, 10, 10, 3, 3, 3, 3, 3, 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] [2021-11-25 20:40:59,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-25 20:40:59,191 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:40:59,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:40:59,192 INFO L85 PathProgramCache]: Analyzing trace with hash -745488665, now seen corresponding path program 1 times [2021-11-25 20:40:59,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:40:59,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315874661] [2021-11-25 20:40:59,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:40:59,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:40:59,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:41:00,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1062 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1062 trivial. 0 not checked. [2021-11-25 20:41:00,480 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:41:00,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315874661] [2021-11-25 20:41:00,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315874661] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:41:00,481 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:41:00,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-25 20:41:00,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140304168] [2021-11-25 20:41:00,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:41:00,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:41:00,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:41:00,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:41:00,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:41:00,484 INFO L87 Difference]: Start difference. First operand 39819 states and 53247 transitions. Second operand has 8 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 3 states have call successors, (56), 2 states have call predecessors, (56), 3 states have return successors, (52), 4 states have call predecessors, (52), 2 states have call successors, (52) [2021-11-25 20:41:02,585 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:41:13,852 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:41:17,115 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:41:23,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:41:23,522 INFO L93 Difference]: Finished difference Result 79900 states and 107171 transitions. [2021-11-25 20:41:23,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 20:41:23,523 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 3 states have call successors, (56), 2 states have call predecessors, (56), 3 states have return successors, (52), 4 states have call predecessors, (52), 2 states have call successors, (52) Word has length 352 [2021-11-25 20:41:23,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:41:23,708 INFO L225 Difference]: With dead ends: 79900 [2021-11-25 20:41:23,709 INFO L226 Difference]: Without dead ends: 40259 [2021-11-25 20:41:23,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:41:23,834 INFO L933 BasicCegarLoop]: 1774 mSDtfsCounter, 9 mSDsluCounter, 12465 mSDsCounter, 0 mSdLazyCounter, 2397 mSolverCounterSat, 9 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 12368 SdHoareTripleChecker+Invalid, 2408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2397 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:41:23,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 12368 Invalid, 2408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2397 Invalid, 2 Unknown, 0 Unchecked, 20.0s Time] [2021-11-25 20:41:23,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40259 states. [2021-11-25 20:41:26,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40259 to 39984. [2021-11-25 20:41:26,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39984 states, 23388 states have (on average 1.2094663930220626) internal successors, (28287), 23872 states have internal predecessors, (28287), 12525 states have call successors, (12525), 4064 states have call predecessors, (12525), 4069 states have return successors, (12655), 12349 states have call predecessors, (12655), 12525 states have call successors, (12655) [2021-11-25 20:41:26,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39984 states to 39984 states and 53467 transitions. [2021-11-25 20:41:26,319 INFO L78 Accepts]: Start accepts. Automaton has 39984 states and 53467 transitions. Word has length 352 [2021-11-25 20:41:26,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:41:26,319 INFO L470 AbstractCegarLoop]: Abstraction has 39984 states and 53467 transitions. [2021-11-25 20:41:26,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 3 states have call successors, (56), 2 states have call predecessors, (56), 3 states have return successors, (52), 4 states have call predecessors, (52), 2 states have call successors, (52) [2021-11-25 20:41:26,320 INFO L276 IsEmpty]: Start isEmpty. Operand 39984 states and 53467 transitions. [2021-11-25 20:41:26,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2021-11-25 20:41:26,336 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:41:26,336 INFO L514 BasicCegarLoop]: trace histogram [21, 13, 13, 13, 13, 13, 13, 10, 10, 3, 3, 3, 3, 3, 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] [2021-11-25 20:41:26,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-25 20:41:26,337 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:41:26,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:41:26,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1991533166, now seen corresponding path program 1 times [2021-11-25 20:41:26,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:41:26,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361073313] [2021-11-25 20:41:26,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:41:26,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:41:26,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:41:27,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1062 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1062 trivial. 0 not checked. [2021-11-25 20:41:27,452 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:41:27,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361073313] [2021-11-25 20:41:27,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361073313] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:41:27,453 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:41:27,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:41:27,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825519966] [2021-11-25 20:41:27,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:41:27,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:41:27,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:41:27,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:41:27,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:41:27,455 INFO L87 Difference]: Start difference. First operand 39984 states and 53467 transitions. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (57), 3 states have call predecessors, (57), 2 states have return successors, (53), 2 states have call predecessors, (53), 2 states have call successors, (53) [2021-11-25 20:41:29,538 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:41:40,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:41:40,238 INFO L93 Difference]: Finished difference Result 39986 states and 53468 transitions. [2021-11-25 20:41:40,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:41:40,239 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (57), 3 states have call predecessors, (57), 2 states have return successors, (53), 2 states have call predecessors, (53), 2 states have call successors, (53) Word has length 355 [2021-11-25 20:41:40,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:41:40,465 INFO L225 Difference]: With dead ends: 39986 [2021-11-25 20:41:40,465 INFO L226 Difference]: Without dead ends: 39984 [2021-11-25 20:41:40,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:41:40,483 INFO L933 BasicCegarLoop]: 1794 mSDtfsCounter, 40 mSDsluCounter, 6302 mSDsCounter, 0 mSdLazyCounter, 1268 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 7155 SdHoareTripleChecker+Invalid, 1270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1268 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2021-11-25 20:41:40,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 7155 Invalid, 1270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1268 Invalid, 1 Unknown, 0 Unchecked, 10.7s Time] [2021-11-25 20:41:40,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39984 states. [2021-11-25 20:41:42,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39984 to 39984. [2021-11-25 20:41:42,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39984 states, 23388 states have (on average 1.2077561142466222) internal successors, (28247), 23872 states have internal predecessors, (28247), 12525 states have call successors, (12525), 4064 states have call predecessors, (12525), 4069 states have return successors, (12655), 12349 states have call predecessors, (12655), 12525 states have call successors, (12655) [2021-11-25 20:41:43,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39984 states to 39984 states and 53427 transitions. [2021-11-25 20:41:43,149 INFO L78 Accepts]: Start accepts. Automaton has 39984 states and 53427 transitions. Word has length 355 [2021-11-25 20:41:43,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:41:43,150 INFO L470 AbstractCegarLoop]: Abstraction has 39984 states and 53427 transitions. [2021-11-25 20:41:43,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (57), 3 states have call predecessors, (57), 2 states have return successors, (53), 2 states have call predecessors, (53), 2 states have call successors, (53) [2021-11-25 20:41:43,151 INFO L276 IsEmpty]: Start isEmpty. Operand 39984 states and 53427 transitions. [2021-11-25 20:41:43,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2021-11-25 20:41:43,178 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:41:43,179 INFO L514 BasicCegarLoop]: trace histogram [24, 13, 13, 13, 13, 13, 13, 7, 7, 6, 6, 6, 5, 5, 5, 5, 3, 3, 3, 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] [2021-11-25 20:41:43,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-25 20:41:43,179 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:41:43,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:41:43,180 INFO L85 PathProgramCache]: Analyzing trace with hash 632677667, now seen corresponding path program 1 times [2021-11-25 20:41:43,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:41:43,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625949760] [2021-11-25 20:41:43,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:41:43,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:41:43,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:41:44,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 66 proven. 2 refuted. 0 times theorem prover too weak. 1123 trivial. 0 not checked. [2021-11-25 20:41:44,352 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:41:44,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625949760] [2021-11-25 20:41:44,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625949760] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:41:44,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701658738] [2021-11-25 20:41:44,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:41:44,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:41:44,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1856421-2ca2-4411-91f2-129d7514ccb6/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:41:44,354 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1856421-2ca2-4411-91f2-129d7514ccb6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:41:44,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1856421-2ca2-4411-91f2-129d7514ccb6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 20:41:48,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:41:48,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 6571 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 20:41:48,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:41:49,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 202 proven. 0 refuted. 0 times theorem prover too weak. 989 trivial. 0 not checked. [2021-11-25 20:41:49,967 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:41:49,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701658738] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:41:49,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:41:49,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-11-25 20:41:49,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090539741] [2021-11-25 20:41:49,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:41:49,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:41:49,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:41:49,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:41:49,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:41:49,971 INFO L87 Difference]: Start difference. First operand 39984 states and 53427 transitions. Second operand has 5 states, 5 states have (on average 28.8) internal successors, (144), 4 states have internal predecessors, (144), 3 states have call successors, (41), 3 states have call predecessors, (41), 4 states have return successors, (39), 4 states have call predecessors, (39), 3 states have call successors, (39) [2021-11-25 20:41:52,066 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:42:01,840 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:42:07,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:42:07,576 INFO L93 Difference]: Finished difference Result 86415 states and 115609 transitions. [2021-11-25 20:42:07,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:42:07,576 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 4 states have internal predecessors, (144), 3 states have call successors, (41), 3 states have call predecessors, (41), 4 states have return successors, (39), 4 states have call predecessors, (39), 3 states have call successors, (39) Word has length 352 [2021-11-25 20:42:07,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:42:07,810 INFO L225 Difference]: With dead ends: 86415 [2021-11-25 20:42:07,811 INFO L226 Difference]: Without dead ends: 46609 [2021-11-25 20:42:07,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-25 20:42:07,944 INFO L933 BasicCegarLoop]: 2657 mSDtfsCounter, 1761 mSDsluCounter, 8111 mSDsCounter, 0 mSdLazyCounter, 1637 mSolverCounterSat, 31 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1761 SdHoareTripleChecker+Valid, 9705 SdHoareTripleChecker+Invalid, 1669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1637 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:42:07,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1761 Valid, 9705 Invalid, 1669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1637 Invalid, 1 Unknown, 0 Unchecked, 14.6s Time] [2021-11-25 20:42:07,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46609 states. [2021-11-25 20:42:10,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46609 to 46589. [2021-11-25 20:42:10,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46589 states, 27212 states have (on average 1.205865059532559) internal successors, (32814), 27777 states have internal predecessors, (32814), 14639 states have call successors, (14639), 4734 states have call predecessors, (14639), 4736 states have return successors, (14773), 14427 states have call predecessors, (14773), 14639 states have call successors, (14773) [2021-11-25 20:42:10,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46589 states to 46589 states and 62226 transitions. [2021-11-25 20:42:10,915 INFO L78 Accepts]: Start accepts. Automaton has 46589 states and 62226 transitions. Word has length 352 [2021-11-25 20:42:10,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:42:10,916 INFO L470 AbstractCegarLoop]: Abstraction has 46589 states and 62226 transitions. [2021-11-25 20:42:10,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 4 states have internal predecessors, (144), 3 states have call successors, (41), 3 states have call predecessors, (41), 4 states have return successors, (39), 4 states have call predecessors, (39), 3 states have call successors, (39) [2021-11-25 20:42:10,916 INFO L276 IsEmpty]: Start isEmpty. Operand 46589 states and 62226 transitions. [2021-11-25 20:42:10,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2021-11-25 20:42:10,940 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:42:10,941 INFO L514 BasicCegarLoop]: trace histogram [24, 13, 13, 13, 13, 13, 13, 7, 7, 6, 6, 6, 5, 5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:42:11,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1856421-2ca2-4411-91f2-129d7514ccb6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 20:42:11,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1856421-2ca2-4411-91f2-129d7514ccb6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-25 20:42:11,166 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:42:11,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:42:11,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1449905850, now seen corresponding path program 1 times [2021-11-25 20:42:11,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:42:11,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543142928] [2021-11-25 20:42:11,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:42:11,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:42:11,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:42:12,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1206 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 1166 trivial. 0 not checked. [2021-11-25 20:42:12,031 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:42:12,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543142928] [2021-11-25 20:42:12,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543142928] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:42:12,032 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:42:12,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:42:12,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181806094] [2021-11-25 20:42:12,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:42:12,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:42:12,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:42:12,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:42:12,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:42:12,035 INFO L87 Difference]: Start difference. First operand 46589 states and 62226 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 3 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-25 20:42:14,128 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:42:32,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:42:32,561 INFO L93 Difference]: Finished difference Result 110509 states and 150239 transitions. [2021-11-25 20:42:32,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:42:32,561 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 3 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) Word has length 368 [2021-11-25 20:42:32,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:42:32,882 INFO L225 Difference]: With dead ends: 110509 [2021-11-25 20:42:32,883 INFO L226 Difference]: Without dead ends: 64098 [2021-11-25 20:42:33,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:42:33,321 INFO L933 BasicCegarLoop]: 3484 mSDtfsCounter, 2110 mSDsluCounter, 5968 mSDsCounter, 0 mSdLazyCounter, 1796 mSolverCounterSat, 301 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2283 SdHoareTripleChecker+Valid, 8630 SdHoareTripleChecker+Invalid, 2098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 1796 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:42:33,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2283 Valid, 8630 Invalid, 2098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 1796 Invalid, 1 Unknown, 0 Unchecked, 16.6s Time] [2021-11-25 20:42:33,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64098 states. [2021-11-25 20:42:36,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64098 to 51404. [2021-11-25 20:42:36,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51404 states, 30011 states have (on average 1.2056246043117524) internal successors, (36182), 30636 states have internal predecessors, (36182), 16125 states have call successors, (16125), 5265 states have call predecessors, (16125), 5266 states have return successors, (16260), 15894 states have call predecessors, (16260), 16125 states have call successors, (16260) [2021-11-25 20:42:37,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51404 states to 51404 states and 68567 transitions. [2021-11-25 20:42:37,017 INFO L78 Accepts]: Start accepts. Automaton has 51404 states and 68567 transitions. Word has length 368 [2021-11-25 20:42:37,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:42:37,018 INFO L470 AbstractCegarLoop]: Abstraction has 51404 states and 68567 transitions. [2021-11-25 20:42:37,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 3 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-25 20:42:37,018 INFO L276 IsEmpty]: Start isEmpty. Operand 51404 states and 68567 transitions. [2021-11-25 20:42:37,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2021-11-25 20:42:37,035 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:42:37,035 INFO L514 BasicCegarLoop]: trace histogram [24, 13, 13, 13, 13, 13, 13, 7, 7, 6, 6, 6, 5, 5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:42:37,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-25 20:42:37,036 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:42:37,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:42:37,036 INFO L85 PathProgramCache]: Analyzing trace with hash 990974322, now seen corresponding path program 1 times [2021-11-25 20:42:37,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:42:37,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726142548] [2021-11-25 20:42:37,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:42:37,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:42:37,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:42:38,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1206 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 1166 trivial. 0 not checked. [2021-11-25 20:42:38,242 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:42:38,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726142548] [2021-11-25 20:42:38,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726142548] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:42:38,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:42:38,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:42:38,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914632558] [2021-11-25 20:42:38,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:42:38,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:42:38,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:42:38,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:42:38,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:42:38,246 INFO L87 Difference]: Start difference. First operand 51404 states and 68567 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 3 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-25 20:42:40,349 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:42:48,776 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:42:49,989 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:42:54,203 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:43:01,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:43:01,980 INFO L93 Difference]: Finished difference Result 120175 states and 162993 transitions. [2021-11-25 20:43:01,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:43:01,981 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 3 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) Word has length 369 [2021-11-25 20:43:01,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:43:02,254 INFO L225 Difference]: With dead ends: 120175 [2021-11-25 20:43:02,254 INFO L226 Difference]: Without dead ends: 68949 [2021-11-25 20:43:02,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:43:02,562 INFO L933 BasicCegarLoop]: 3452 mSDtfsCounter, 2122 mSDsluCounter, 5905 mSDsCounter, 0 mSdLazyCounter, 1760 mSolverCounterSat, 307 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2295 SdHoareTripleChecker+Valid, 8556 SdHoareTripleChecker+Invalid, 2068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 1760 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:43:02,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2295 Valid, 8556 Invalid, 2068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 1760 Invalid, 1 Unknown, 0 Unchecked, 19.4s Time] [2021-11-25 20:43:02,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68949 states. [2021-11-25 20:43:05,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68949 to 56255. [2021-11-25 20:43:06,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56255 states, 32846 states have (on average 1.205200024356086) internal successors, (39586), 33531 states have internal predecessors, (39586), 17611 states have call successors, (17611), 5796 states have call predecessors, (17611), 5796 states have return successors, (17747), 17361 states have call predecessors, (17747), 17611 states have call successors, (17747) [2021-11-25 20:43:06,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56255 states to 56255 states and 74944 transitions. [2021-11-25 20:43:06,229 INFO L78 Accepts]: Start accepts. Automaton has 56255 states and 74944 transitions. Word has length 369 [2021-11-25 20:43:06,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:43:06,230 INFO L470 AbstractCegarLoop]: Abstraction has 56255 states and 74944 transitions. [2021-11-25 20:43:06,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 3 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-25 20:43:06,231 INFO L276 IsEmpty]: Start isEmpty. Operand 56255 states and 74944 transitions. [2021-11-25 20:43:06,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2021-11-25 20:43:06,257 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:43:06,257 INFO L514 BasicCegarLoop]: trace histogram [24, 13, 13, 13, 13, 13, 13, 7, 7, 6, 6, 6, 5, 5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:43:06,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-25 20:43:06,258 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 20:43:06,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:43:06,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1386214275, now seen corresponding path program 1 times [2021-11-25 20:43:06,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:43:06,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758483608] [2021-11-25 20:43:06,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:43:06,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:43:07,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:43:07,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1206 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 1166 trivial. 0 not checked. [2021-11-25 20:43:07,429 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:43:07,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758483608] [2021-11-25 20:43:07,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758483608] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:43:07,429 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:43:07,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:43:07,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618802878] [2021-11-25 20:43:07,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:43:07,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:43:07,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:43:07,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:43:07,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:43:07,432 INFO L87 Difference]: Start difference. First operand 56255 states and 74944 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 3 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-25 20:43:09,576 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:43:18,294 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:43:26,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:43:26,035 INFO L93 Difference]: Finished difference Result 129461 states and 175200 transitions. [2021-11-25 20:43:26,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:43:26,036 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 3 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) Word has length 370 [2021-11-25 20:43:26,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:43:26,288 INFO L225 Difference]: With dead ends: 129461 [2021-11-25 20:43:26,288 INFO L226 Difference]: Without dead ends: 73384 [2021-11-25 20:43:26,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:43:26,410 INFO L933 BasicCegarLoop]: 3360 mSDtfsCounter, 1983 mSDsluCounter, 5836 mSDsCounter, 0 mSdLazyCounter, 1757 mSolverCounterSat, 315 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2156 SdHoareTripleChecker+Valid, 8400 SdHoareTripleChecker+Invalid, 2074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 1757 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:43:26,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2156 Valid, 8400 Invalid, 2074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 1757 Invalid, 2 Unknown, 0 Unchecked, 13.6s Time] [2021-11-25 20:43:26,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73384 states.