./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-sun-cassini.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66c42b89-06b0-40f0-85db-9329d2389434/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66c42b89-06b0-40f0-85db-9329d2389434/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66c42b89-06b0-40f0-85db-9329d2389434/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66c42b89-06b0-40f0-85db-9329d2389434/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-sun-cassini.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66c42b89-06b0-40f0-85db-9329d2389434/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66c42b89-06b0-40f0-85db-9329d2389434/bin/utaipan-I9t0OCRTmS --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 463dbca1530ea0e57c159e9405d50f794488f63283b3e27908f44b92b1921358 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 07:16:24,637 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:16:24,640 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:16:24,687 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:16:24,689 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:16:24,691 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:16:24,693 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:16:24,699 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:16:24,703 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:16:24,708 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:16:24,709 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:16:24,711 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:16:24,713 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:16:24,717 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:16:24,718 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:16:24,720 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:16:24,723 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:16:24,731 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:16:24,733 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:16:24,734 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:16:24,736 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:16:24,744 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:16:24,745 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:16:24,746 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:16:24,749 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:16:24,752 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:16:24,753 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:16:24,754 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:16:24,754 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:16:24,756 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:16:24,757 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:16:24,758 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:16:24,760 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:16:24,761 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:16:24,763 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:16:24,764 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:16:24,764 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:16:24,765 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:16:24,765 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:16:24,766 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:16:24,767 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:16:24,768 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66c42b89-06b0-40f0-85db-9329d2389434/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-19 07:16:24,810 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:16:24,810 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:16:24,811 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:16:24,811 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:16:24,813 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:16:24,813 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:16:24,813 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:16:24,813 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:16:24,814 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:16:24,814 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:16:24,815 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:16:24,816 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:16:24,816 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:16:24,816 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:16:24,816 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:16:24,817 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:16:24,817 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:16:24,817 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:16:24,818 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:16:24,818 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:16:24,818 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:16:24,819 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:16:24,819 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:16:24,821 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:16:24,821 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:16:24,821 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:16:24,821 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:16:24,822 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:16:24,822 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:16:24,822 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:16:24,823 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:16:24,823 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:16:24,823 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:16:24,824 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:16:24,824 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:16:24,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:16:24,824 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:16:24,825 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:16:24,825 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_66c42b89-06b0-40f0-85db-9329d2389434/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66c42b89-06b0-40f0-85db-9329d2389434/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 463dbca1530ea0e57c159e9405d50f794488f63283b3e27908f44b92b1921358 [2022-11-19 07:16:25,178 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:16:25,212 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:16:25,215 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:16:25,217 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:16:25,218 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:16:25,219 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66c42b89-06b0-40f0-85db-9329d2389434/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-sun-cassini.cil.i [2022-11-19 07:16:25,290 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66c42b89-06b0-40f0-85db-9329d2389434/bin/utaipan-I9t0OCRTmS/data/a5be4b0fb/321375e69859440d846c2e79d476f5cd/FLAG931ec24b2 [2022-11-19 07:16:26,532 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:16:26,533 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66c42b89-06b0-40f0-85db-9329d2389434/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-sun-cassini.cil.i [2022-11-19 07:16:26,601 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66c42b89-06b0-40f0-85db-9329d2389434/bin/utaipan-I9t0OCRTmS/data/a5be4b0fb/321375e69859440d846c2e79d476f5cd/FLAG931ec24b2 [2022-11-19 07:16:26,736 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66c42b89-06b0-40f0-85db-9329d2389434/bin/utaipan-I9t0OCRTmS/data/a5be4b0fb/321375e69859440d846c2e79d476f5cd [2022-11-19 07:16:26,740 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:16:26,743 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:16:26,747 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:16:26,747 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:16:26,751 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:16:26,752 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:16:26" (1/1) ... [2022-11-19 07:16:26,753 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f368424 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:16:26, skipping insertion in model container [2022-11-19 07:16:26,754 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:16:26" (1/1) ... [2022-11-19 07:16:26,761 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:16:26,937 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:16:32,716 WARN L234 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_66c42b89-06b0-40f0-85db-9329d2389434/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-sun-cassini.cil.i[487146,487159] [2022-11-19 07:16:32,723 WARN L234 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_66c42b89-06b0-40f0-85db-9329d2389434/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-sun-cassini.cil.i[487315,487328] [2022-11-19 07:16:32,724 WARN L234 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_66c42b89-06b0-40f0-85db-9329d2389434/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-sun-cassini.cil.i[487482,487495] [2022-11-19 07:16:32,727 WARN L234 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_66c42b89-06b0-40f0-85db-9329d2389434/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-sun-cassini.cil.i[487650,487663] [2022-11-19 07:16:32,812 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:16:32,864 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:16:33,542 WARN L234 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_66c42b89-06b0-40f0-85db-9329d2389434/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-sun-cassini.cil.i[487146,487159] [2022-11-19 07:16:33,548 WARN L234 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_66c42b89-06b0-40f0-85db-9329d2389434/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-sun-cassini.cil.i[487315,487328] [2022-11-19 07:16:33,549 WARN L234 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_66c42b89-06b0-40f0-85db-9329d2389434/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-sun-cassini.cil.i[487482,487495] [2022-11-19 07:16:33,550 WARN L234 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_66c42b89-06b0-40f0-85db-9329d2389434/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-sun-cassini.cil.i[487650,487663] [2022-11-19 07:16:33,578 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:16:33,865 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:16:33,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:16:33 WrapperNode [2022-11-19 07:16:33,866 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:16:33,867 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:16:33,868 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:16:33,868 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:16:33,876 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:16:33" (1/1) ... [2022-11-19 07:16:34,038 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:16:33" (1/1) ... [2022-11-19 07:16:34,445 INFO L138 Inliner]: procedures = 676, calls = 4258, calls flagged for inlining = 325, calls inlined = 302, statements flattened = 10718 [2022-11-19 07:16:34,446 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:16:34,448 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:16:34,448 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:16:34,449 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:16:34,460 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:16:33" (1/1) ... [2022-11-19 07:16:34,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:16:33" (1/1) ... [2022-11-19 07:16:34,640 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:16:33" (1/1) ... [2022-11-19 07:16:34,647 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:16:33" (1/1) ... [2022-11-19 07:16:34,955 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:16:33" (1/1) ... [2022-11-19 07:16:35,009 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:16:33" (1/1) ... [2022-11-19 07:16:35,080 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:16:33" (1/1) ... [2022-11-19 07:16:35,105 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:16:33" (1/1) ... [2022-11-19 07:16:35,187 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:16:35,189 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:16:35,189 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:16:35,189 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:16:35,191 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:16:33" (1/1) ... [2022-11-19 07:16:35,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:16:35,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66c42b89-06b0-40f0-85db-9329d2389434/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:16:35,232 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66c42b89-06b0-40f0-85db-9329d2389434/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:16:35,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66c42b89-06b0-40f0-85db-9329d2389434/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:16:35,286 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2022-11-19 07:16:35,286 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2022-11-19 07:16:35,286 INFO L130 BoogieDeclarations]: Found specification of procedure cas_phy_read [2022-11-19 07:16:35,286 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_phy_read [2022-11-19 07:16:35,287 INFO L130 BoogieDeclarations]: Found specification of procedure cas_pcs_link_check [2022-11-19 07:16:35,287 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_pcs_link_check [2022-11-19 07:16:35,287 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mod_timer_121 [2022-11-19 07:16:35,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mod_timer_121 [2022-11-19 07:16:35,287 INFO L130 BoogieDeclarations]: Found specification of procedure pci_release_regions [2022-11-19 07:16:35,288 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_release_regions [2022-11-19 07:16:35,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-19 07:16:35,288 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-19 07:16:35,288 INFO L130 BoogieDeclarations]: Found specification of procedure lowmem_page_address [2022-11-19 07:16:35,289 INFO L138 BoogieDeclarations]: Found implementation of procedure lowmem_page_address [2022-11-19 07:16:35,289 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unmap_page [2022-11-19 07:16:35,289 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unmap_page [2022-11-19 07:16:35,289 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-19 07:16:35,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-19 07:16:35,290 INFO L130 BoogieDeclarations]: Found specification of procedure cas_mii_link_check [2022-11-19 07:16:35,290 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_mii_link_check [2022-11-19 07:16:35,290 INFO L130 BoogieDeclarations]: Found specification of procedure cas_calc_tabort [2022-11-19 07:16:35,290 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_calc_tabort [2022-11-19 07:16:35,290 INFO L130 BoogieDeclarations]: Found specification of procedure pci_read_config_word [2022-11-19 07:16:35,291 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_read_config_word [2022-11-19 07:16:35,291 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_timer_timer_instance_3 [2022-11-19 07:16:35,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_timer_timer_instance_3 [2022-11-19 07:16:35,292 INFO L130 BoogieDeclarations]: Found specification of procedure pci_dma_sync_single_for_cpu [2022-11-19 07:16:35,292 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_dma_sync_single_for_cpu [2022-11-19 07:16:35,292 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2022-11-19 07:16:35,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2022-11-19 07:16:35,293 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mod_timer_147 [2022-11-19 07:16:35,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mod_timer_147 [2022-11-19 07:16:35,293 INFO L130 BoogieDeclarations]: Found specification of procedure dma_map_page [2022-11-19 07:16:35,293 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_map_page [2022-11-19 07:16:35,293 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2022-11-19 07:16:35,294 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2022-11-19 07:16:35,294 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_on [2022-11-19 07:16:35,294 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_on [2022-11-19 07:16:35,295 INFO L130 BoogieDeclarations]: Found specification of procedure cas_lock_tx [2022-11-19 07:16:35,295 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_lock_tx [2022-11-19 07:16:35,295 INFO L130 BoogieDeclarations]: Found specification of procedure pci_name [2022-11-19 07:16:35,295 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_name [2022-11-19 07:16:35,296 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-11-19 07:16:35,297 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-11-19 07:16:35,298 INFO L130 BoogieDeclarations]: Found specification of procedure cas_disable_irq [2022-11-19 07:16:35,298 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_disable_irq [2022-11-19 07:16:35,298 INFO L130 BoogieDeclarations]: Found specification of procedure cas_free_rxds [2022-11-19 07:16:35,298 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_free_rxds [2022-11-19 07:16:35,298 INFO L130 BoogieDeclarations]: Found specification of procedure pci_map_page [2022-11-19 07:16:35,299 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_map_page [2022-11-19 07:16:35,299 INFO L130 BoogieDeclarations]: Found specification of procedure cas_open [2022-11-19 07:16:35,299 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_open [2022-11-19 07:16:35,299 INFO L130 BoogieDeclarations]: Found specification of procedure cas_interrupt [2022-11-19 07:16:35,300 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_interrupt [2022-11-19 07:16:35,300 INFO L130 BoogieDeclarations]: Found specification of procedure cas_tx_tiny_free [2022-11-19 07:16:35,301 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_tx_tiny_free [2022-11-19 07:16:35,301 INFO L130 BoogieDeclarations]: Found specification of procedure PageTail [2022-11-19 07:16:35,301 INFO L138 BoogieDeclarations]: Found implementation of procedure PageTail [2022-11-19 07:16:35,301 INFO L130 BoogieDeclarations]: Found specification of procedure tx_tiny_map [2022-11-19 07:16:35,301 INFO L138 BoogieDeclarations]: Found implementation of procedure tx_tiny_map [2022-11-19 07:16:35,302 INFO L130 BoogieDeclarations]: Found specification of procedure cas_phy_init [2022-11-19 07:16:35,302 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_phy_init [2022-11-19 07:16:35,302 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_pages [2022-11-19 07:16:35,302 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_pages [2022-11-19 07:16:35,302 INFO L130 BoogieDeclarations]: Found specification of procedure skb_frag_size_set [2022-11-19 07:16:35,303 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_frag_size_set [2022-11-19 07:16:35,304 INFO L130 BoogieDeclarations]: Found specification of procedure pci_get_drvdata [2022-11-19 07:16:35,304 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_get_drvdata [2022-11-19 07:16:35,304 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2022-11-19 07:16:35,304 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2022-11-19 07:16:35,305 INFO L130 BoogieDeclarations]: Found specification of procedure cas_enable_irq [2022-11-19 07:16:35,305 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_enable_irq [2022-11-19 07:16:35,305 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2022-11-19 07:16:35,305 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2022-11-19 07:16:35,305 INFO L130 BoogieDeclarations]: Found specification of procedure skb_end_pointer [2022-11-19 07:16:35,306 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_end_pointer [2022-11-19 07:16:35,306 INFO L130 BoogieDeclarations]: Found specification of procedure cas_page_dequeue [2022-11-19 07:16:35,307 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_page_dequeue [2022-11-19 07:16:35,307 INFO L130 BoogieDeclarations]: Found specification of procedure netif_rx [2022-11-19 07:16:35,307 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_rx [2022-11-19 07:16:35,308 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2022-11-19 07:16:35,308 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2022-11-19 07:16:35,309 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2022-11-19 07:16:35,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2022-11-19 07:16:35,309 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-11-19 07:16:35,309 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-11-19 07:16:35,311 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_attach [2022-11-19 07:16:35,311 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_attach [2022-11-19 07:16:35,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:16:35,311 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_108 [2022-11-19 07:16:35,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_108 [2022-11-19 07:16:35,312 INFO L130 BoogieDeclarations]: Found specification of procedure pci_write_config_word [2022-11-19 07:16:35,312 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_write_config_word [2022-11-19 07:16:35,312 INFO L130 BoogieDeclarations]: Found specification of procedure cas_set_multicast [2022-11-19 07:16:35,312 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_set_multicast [2022-11-19 07:16:35,312 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2022-11-19 07:16:35,313 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2022-11-19 07:16:35,313 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_detach [2022-11-19 07:16:35,313 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_detach [2022-11-19 07:16:35,314 INFO L130 BoogieDeclarations]: Found specification of procedure cas_spare_free [2022-11-19 07:16:35,314 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_spare_free [2022-11-19 07:16:35,314 INFO L130 BoogieDeclarations]: Found specification of procedure cas_tx_timeout [2022-11-19 07:16:35,314 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_tx_timeout [2022-11-19 07:16:35,315 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-11-19 07:16:35,316 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-11-19 07:16:35,319 INFO L130 BoogieDeclarations]: Found specification of procedure cas_read_pcs_link_mode [2022-11-19 07:16:35,319 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_read_pcs_link_mode [2022-11-19 07:16:35,319 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2022-11-19 07:16:35,320 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2022-11-19 07:16:35,321 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-19 07:16:35,321 INFO L130 BoogieDeclarations]: Found specification of procedure cas_close [2022-11-19 07:16:35,322 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_close [2022-11-19 07:16:35,323 INFO L130 BoogieDeclarations]: Found specification of procedure cas_page_swap [2022-11-19 07:16:35,323 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_page_swap [2022-11-19 07:16:35,330 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2022-11-19 07:16:35,330 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2022-11-19 07:16:35,330 INFO L130 BoogieDeclarations]: Found specification of procedure cas_netpoll [2022-11-19 07:16:35,331 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_netpoll [2022-11-19 07:16:35,331 INFO L130 BoogieDeclarations]: Found specification of procedure cas_hard_reset [2022-11-19 07:16:35,331 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_hard_reset [2022-11-19 07:16:35,331 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2022-11-19 07:16:35,331 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2022-11-19 07:16:35,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-19 07:16:35,332 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2022-11-19 07:16:35,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2022-11-19 07:16:35,332 INFO L130 BoogieDeclarations]: Found specification of procedure cas_rxc_init [2022-11-19 07:16:35,332 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_rxc_init [2022-11-19 07:16:35,333 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 07:16:35,333 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-19 07:16:35,333 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-19 07:16:35,333 INFO L130 BoogieDeclarations]: Found specification of procedure cas_clear_mac_err [2022-11-19 07:16:35,333 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_clear_mac_err [2022-11-19 07:16:35,333 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_interrupt_context [2022-11-19 07:16:35,334 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_interrupt_context [2022-11-19 07:16:35,334 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2022-11-19 07:16:35,334 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2022-11-19 07:16:35,334 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_err_code [2022-11-19 07:16:35,334 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_err_code [2022-11-19 07:16:35,335 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_dma_mask [2022-11-19 07:16:35,335 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_dma_mask [2022-11-19 07:16:35,335 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_timer_instance_callback_3_2 [2022-11-19 07:16:35,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_timer_instance_callback_3_2 [2022-11-19 07:16:35,335 INFO L130 BoogieDeclarations]: Found specification of procedure cas_remove_one [2022-11-19 07:16:35,335 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_remove_one [2022-11-19 07:16:35,336 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_NOT_ARG_SIGN [2022-11-19 07:16:35,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_NOT_ARG_SIGN [2022-11-19 07:16:35,336 INFO L130 BoogieDeclarations]: Found specification of procedure pci_free_consistent [2022-11-19 07:16:35,336 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_free_consistent [2022-11-19 07:16:35,336 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2022-11-19 07:16:35,337 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2022-11-19 07:16:35,337 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2022-11-19 07:16:35,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2022-11-19 07:16:35,337 INFO L130 BoogieDeclarations]: Found specification of procedure __skb_dequeue [2022-11-19 07:16:35,337 INFO L138 BoogieDeclarations]: Found implementation of procedure __skb_dequeue [2022-11-19 07:16:35,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 07:16:35,338 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mod_timer [2022-11-19 07:16:35,338 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mod_timer [2022-11-19 07:16:35,338 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:16:35,338 INFO L130 BoogieDeclarations]: Found specification of procedure list_splice_init [2022-11-19 07:16:35,338 INFO L138 BoogieDeclarations]: Found implementation of procedure list_splice_init [2022-11-19 07:16:35,339 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2022-11-19 07:16:35,339 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2022-11-19 07:16:35,339 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2022-11-19 07:16:35,339 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2022-11-19 07:16:35,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-19 07:16:35,339 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2022-11-19 07:16:35,340 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2022-11-19 07:16:35,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2022-11-19 07:16:35,340 INFO L130 BoogieDeclarations]: Found specification of procedure cas_set_link_modes [2022-11-19 07:16:35,340 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_set_link_modes [2022-11-19 07:16:35,340 INFO L130 BoogieDeclarations]: Found specification of procedure cas_link_timer [2022-11-19 07:16:35,341 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_link_timer [2022-11-19 07:16:35,341 INFO L130 BoogieDeclarations]: Found specification of procedure cas_read_mii_link_mode [2022-11-19 07:16:35,341 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_read_mii_link_mode [2022-11-19 07:16:35,341 INFO L130 BoogieDeclarations]: Found specification of procedure __list_splice [2022-11-19 07:16:35,341 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_splice [2022-11-19 07:16:35,342 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2022-11-19 07:16:35,342 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2022-11-19 07:16:35,342 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~TO~VOID [2022-11-19 07:16:35,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~TO~VOID [2022-11-19 07:16:35,342 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2022-11-19 07:16:35,342 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2022-11-19 07:16:35,343 INFO L130 BoogieDeclarations]: Found specification of procedure kmap_atomic [2022-11-19 07:16:35,343 INFO L138 BoogieDeclarations]: Found implementation of procedure kmap_atomic [2022-11-19 07:16:35,343 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_spin_lock [2022-11-19 07:16:35,343 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_spin_lock [2022-11-19 07:16:35,343 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2022-11-19 07:16:35,344 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2022-11-19 07:16:35,344 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2022-11-19 07:16:35,344 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2022-11-19 07:16:35,344 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2022-11-19 07:16:35,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2022-11-19 07:16:35,344 INFO L130 BoogieDeclarations]: Found specification of procedure csum_unfold [2022-11-19 07:16:35,345 INFO L138 BoogieDeclarations]: Found implementation of procedure csum_unfold [2022-11-19 07:16:35,345 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~TO~VOID [2022-11-19 07:16:35,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~TO~VOID [2022-11-19 07:16:35,345 INFO L130 BoogieDeclarations]: Found specification of procedure writel [2022-11-19 07:16:35,345 INFO L138 BoogieDeclarations]: Found implementation of procedure writel [2022-11-19 07:16:35,345 INFO L130 BoogieDeclarations]: Found specification of procedure cas_entropy_gather [2022-11-19 07:16:35,346 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_entropy_gather [2022-11-19 07:16:35,346 INFO L130 BoogieDeclarations]: Found specification of procedure cas_resume [2022-11-19 07:16:35,346 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_resume [2022-11-19 07:16:35,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:16:35,346 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:16:35,347 INFO L130 BoogieDeclarations]: Found specification of procedure cas_page_alloc [2022-11-19 07:16:35,347 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_page_alloc [2022-11-19 07:16:35,347 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-19 07:16:35,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-19 07:16:35,347 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-19 07:16:35,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-19 07:16:35,348 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2022-11-19 07:16:35,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2022-11-19 07:16:35,348 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_off [2022-11-19 07:16:35,348 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_off [2022-11-19 07:16:35,348 INFO L130 BoogieDeclarations]: Found specification of procedure cas_mif_poll [2022-11-19 07:16:35,348 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_mif_poll [2022-11-19 07:16:35,349 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_process_context [2022-11-19 07:16:35,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_process_context [2022-11-19 07:16:35,349 INFO L130 BoogieDeclarations]: Found specification of procedure cas_unlock_tx [2022-11-19 07:16:35,349 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_unlock_tx [2022-11-19 07:16:35,349 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-11-19 07:16:35,350 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-11-19 07:16:35,350 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_133 [2022-11-19 07:16:35,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_133 [2022-11-19 07:16:35,350 INFO L130 BoogieDeclarations]: Found specification of procedure list_splice [2022-11-19 07:16:35,350 INFO L138 BoogieDeclarations]: Found implementation of procedure list_splice [2022-11-19 07:16:35,350 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_135 [2022-11-19 07:16:35,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_135 [2022-11-19 07:16:35,351 INFO L130 BoogieDeclarations]: Found specification of procedure ethtool_cmd_speed_set [2022-11-19 07:16:35,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ethtool_cmd_speed_set [2022-11-19 07:16:35,351 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_sub [2022-11-19 07:16:35,352 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_sub [2022-11-19 07:16:35,356 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_read [2022-11-19 07:16:35,356 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_read [2022-11-19 07:16:35,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-19 07:16:35,357 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-19 07:16:35,357 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2022-11-19 07:16:35,357 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2022-11-19 07:16:35,357 INFO L130 BoogieDeclarations]: Found specification of procedure pci_alloc_consistent [2022-11-19 07:16:35,357 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_alloc_consistent [2022-11-19 07:16:35,357 INFO L130 BoogieDeclarations]: Found specification of procedure tx_tiny_buf [2022-11-19 07:16:35,358 INFO L138 BoogieDeclarations]: Found implementation of procedure tx_tiny_buf [2022-11-19 07:16:35,359 INFO L130 BoogieDeclarations]: Found specification of procedure cas_mac_reset [2022-11-19 07:16:35,360 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_mac_reset [2022-11-19 07:16:35,360 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_lock_of_cas [2022-11-19 07:16:35,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_lock_of_cas [2022-11-19 07:16:35,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 07:16:35,360 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2022-11-19 07:16:35,360 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2022-11-19 07:16:35,361 INFO L130 BoogieDeclarations]: Found specification of procedure __skb_frag_set_page [2022-11-19 07:16:35,361 INFO L138 BoogieDeclarations]: Found implementation of procedure __skb_frag_set_page [2022-11-19 07:16:35,361 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-19 07:16:35,361 INFO L130 BoogieDeclarations]: Found specification of procedure cas_get_regs_len [2022-11-19 07:16:35,361 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_get_regs_len [2022-11-19 07:16:35,361 INFO L130 BoogieDeclarations]: Found specification of procedure cas_reset [2022-11-19 07:16:35,362 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_reset [2022-11-19 07:16:35,362 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dispatch_instance_register_8_2 [2022-11-19 07:16:35,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dispatch_instance_register_8_2 [2022-11-19 07:16:35,362 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_NOT_ARG_SIGN [2022-11-19 07:16:35,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_NOT_ARG_SIGN [2022-11-19 07:16:35,362 INFO L130 BoogieDeclarations]: Found specification of procedure __free_pages [2022-11-19 07:16:35,363 INFO L138 BoogieDeclarations]: Found implementation of procedure __free_pages [2022-11-19 07:16:35,363 INFO L130 BoogieDeclarations]: Found specification of procedure cas_post_page [2022-11-19 07:16:35,363 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_post_page [2022-11-19 07:16:35,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-19 07:16:35,363 INFO L130 BoogieDeclarations]: Found specification of procedure pci_write_config_byte [2022-11-19 07:16:35,363 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_write_config_byte [2022-11-19 07:16:35,364 INFO L130 BoogieDeclarations]: Found specification of procedure cas_nway_reset [2022-11-19 07:16:35,364 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_nway_reset [2022-11-19 07:16:35,364 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2022-11-19 07:16:35,364 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2022-11-19 07:16:35,364 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-11-19 07:16:35,364 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-11-19 07:16:35,365 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2022-11-19 07:16:35,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2022-11-19 07:16:35,365 INFO L130 BoogieDeclarations]: Found specification of procedure cas_setup_multicast [2022-11-19 07:16:35,365 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_setup_multicast [2022-11-19 07:16:35,365 INFO L130 BoogieDeclarations]: Found specification of procedure cas_phy_powerdown [2022-11-19 07:16:35,365 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_phy_powerdown [2022-11-19 07:16:35,366 INFO L130 BoogieDeclarations]: Found specification of procedure cas_post_rxds_ringN [2022-11-19 07:16:35,366 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_post_rxds_ringN [2022-11-19 07:16:35,366 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_irq [2022-11-19 07:16:35,366 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_irq [2022-11-19 07:16:35,366 INFO L130 BoogieDeclarations]: Found specification of procedure cas_vpd_match [2022-11-19 07:16:35,366 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_vpd_match [2022-11-19 07:16:35,367 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_83 [2022-11-19 07:16:35,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_83 [2022-11-19 07:16:35,367 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_81 [2022-11-19 07:16:35,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_81 [2022-11-19 07:16:35,367 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2022-11-19 07:16:35,367 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2022-11-19 07:16:35,367 INFO L130 BoogieDeclarations]: Found specification of procedure cpumask_weight [2022-11-19 07:16:35,368 INFO L138 BoogieDeclarations]: Found implementation of procedure cpumask_weight [2022-11-19 07:16:35,368 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2022-11-19 07:16:35,368 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2022-11-19 07:16:35,368 INFO L130 BoogieDeclarations]: Found specification of procedure page_count [2022-11-19 07:16:35,368 INFO L138 BoogieDeclarations]: Found implementation of procedure page_count [2022-11-19 07:16:35,368 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2022-11-19 07:16:35,369 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2022-11-19 07:16:35,369 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_77 [2022-11-19 07:16:35,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_77 [2022-11-19 07:16:35,369 INFO L130 BoogieDeclarations]: Found specification of procedure cas_shutdown [2022-11-19 07:16:35,369 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_shutdown [2022-11-19 07:16:35,369 INFO L130 BoogieDeclarations]: Found specification of procedure cas_begin_auto_negotiation [2022-11-19 07:16:35,370 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_begin_auto_negotiation [2022-11-19 07:16:35,370 INFO L130 BoogieDeclarations]: Found specification of procedure skb_frag_page [2022-11-19 07:16:35,370 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_frag_page [2022-11-19 07:16:35,370 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2022-11-19 07:16:35,370 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2022-11-19 07:16:35,370 INFO L130 BoogieDeclarations]: Found specification of procedure cas_write_txd [2022-11-19 07:16:35,371 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_write_txd [2022-11-19 07:16:35,371 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-19 07:16:35,371 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-19 07:16:35,371 INFO L130 BoogieDeclarations]: Found specification of procedure __skb_frag_ref [2022-11-19 07:16:35,371 INFO L138 BoogieDeclarations]: Found implementation of procedure __skb_frag_ref [2022-11-19 07:16:35,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 07:16:35,372 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-19 07:16:35,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-19 07:16:35,372 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_82 [2022-11-19 07:16:35,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_82 [2022-11-19 07:16:35,372 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_84 [2022-11-19 07:16:35,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_84 [2022-11-19 07:16:35,373 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_79 [2022-11-19 07:16:35,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_79 [2022-11-19 07:16:35,373 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_inc [2022-11-19 07:16:35,373 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_inc [2022-11-19 07:16:35,373 INFO L130 BoogieDeclarations]: Found specification of procedure cas_init_hw [2022-11-19 07:16:35,373 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_init_hw [2022-11-19 07:16:35,373 INFO L130 BoogieDeclarations]: Found specification of procedure cas_clean_rings [2022-11-19 07:16:35,374 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_clean_rings [2022-11-19 07:16:35,374 INFO L130 BoogieDeclarations]: Found specification of procedure cas_page_free [2022-11-19 07:16:35,374 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_page_free [2022-11-19 07:16:35,374 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec [2022-11-19 07:16:35,374 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec [2022-11-19 07:16:35,374 INFO L130 BoogieDeclarations]: Found specification of procedure cas_phy_write [2022-11-19 07:16:35,375 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_phy_write [2022-11-19 07:16:35,375 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2022-11-19 07:16:35,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2022-11-19 07:16:35,375 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_work [2022-11-19 07:16:35,375 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_work [2022-11-19 07:16:35,375 INFO L130 BoogieDeclarations]: Found specification of procedure pci_iounmap [2022-11-19 07:16:35,376 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_iounmap [2022-11-19 07:16:35,376 INFO L130 BoogieDeclarations]: Found specification of procedure cas_spare_recover [2022-11-19 07:16:35,376 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_spare_recover [2022-11-19 07:16:35,376 INFO L130 BoogieDeclarations]: Found specification of procedure ethtool_cmd_speed [2022-11-19 07:16:35,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ethtool_cmd_speed [2022-11-19 07:16:35,376 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2022-11-19 07:16:35,377 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2022-11-19 07:16:35,377 INFO L130 BoogieDeclarations]: Found specification of procedure cas_get_stats [2022-11-19 07:16:35,377 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_get_stats [2022-11-19 07:16:35,377 INFO L130 BoogieDeclarations]: Found specification of procedure readl [2022-11-19 07:16:35,377 INFO L138 BoogieDeclarations]: Found implementation of procedure readl [2022-11-19 07:16:35,377 INFO L130 BoogieDeclarations]: Found specification of procedure __kunmap_atomic [2022-11-19 07:16:35,378 INFO L138 BoogieDeclarations]: Found implementation of procedure __kunmap_atomic [2022-11-19 07:16:35,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:16:35,378 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2022-11-19 07:16:35,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2022-11-19 07:16:35,378 INFO L130 BoogieDeclarations]: Found specification of procedure pci_dma_sync_single_for_device [2022-11-19 07:16:35,378 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_dma_sync_single_for_device [2022-11-19 07:16:35,379 INFO L130 BoogieDeclarations]: Found specification of procedure readb [2022-11-19 07:16:35,379 INFO L138 BoogieDeclarations]: Found implementation of procedure readb [2022-11-19 07:16:35,379 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_107 [2022-11-19 07:16:35,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_107 [2022-11-19 07:16:36,812 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:16:36,820 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:16:37,378 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-19 07:20:08,638 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:20:17,861 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:20:17,861 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-19 07:20:17,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:20:17 BoogieIcfgContainer [2022-11-19 07:20:17,872 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:20:17,874 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:20:17,874 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:20:17,880 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:20:17,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:16:26" (1/3) ... [2022-11-19 07:20:17,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f55a6e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:20:17, skipping insertion in model container [2022-11-19 07:20:17,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:16:33" (2/3) ... [2022-11-19 07:20:17,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f55a6e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:20:17, skipping insertion in model container [2022-11-19 07:20:17,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:20:17" (3/3) ... [2022-11-19 07:20:17,884 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-sun-cassini.cil.i [2022-11-19 07:20:17,906 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:20:17,907 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-11-19 07:20:18,030 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:20:18,038 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4d135fbd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:20:18,038 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-19 07:20:18,052 INFO L276 IsEmpty]: Start isEmpty. Operand has 2825 states, 1584 states have (on average 1.2613636363636365) internal successors, (1998), 1665 states have internal predecessors, (1998), 1066 states have call successors, (1066), 173 states have call predecessors, (1066), 172 states have return successors, (1062), 1048 states have call predecessors, (1062), 1062 states have call successors, (1062) [2022-11-19 07:20:18,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-19 07:20:18,063 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:20:18,064 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:20:18,065 INFO L420 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)] === [2022-11-19 07:20:18,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:20:18,071 INFO L85 PathProgramCache]: Analyzing trace with hash -61988292, now seen corresponding path program 1 times [2022-11-19 07:20:18,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:20:18,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592482788] [2022-11-19 07:20:18,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:20:18,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:20:19,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:20:20,964 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:20:20,964 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:20:20,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592482788] [2022-11-19 07:20:20,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592482788] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:20:20,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:20:20,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:20:20,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048799841] [2022-11-19 07:20:20,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:20:20,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:20:20,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:20:21,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:20:21,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:20:21,031 INFO L87 Difference]: Start difference. First operand has 2825 states, 1584 states have (on average 1.2613636363636365) internal successors, (1998), 1665 states have internal predecessors, (1998), 1066 states have call successors, (1066), 173 states have call predecessors, (1066), 172 states have return successors, (1062), 1048 states have call predecessors, (1062), 1062 states have call successors, (1062) Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-19 07:20:23,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:20:36,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:20:36,364 INFO L93 Difference]: Finished difference Result 7966 states and 12094 transitions. [2022-11-19 07:20:36,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:20:36,371 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 35 [2022-11-19 07:20:36,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:20:36,443 INFO L225 Difference]: With dead ends: 7966 [2022-11-19 07:20:36,444 INFO L226 Difference]: Without dead ends: 5144 [2022-11-19 07:20:36,481 INFO L412 NwaCegarLoop]: 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 [2022-11-19 07:20:36,484 INFO L413 NwaCegarLoop]: 4675 mSDtfsCounter, 3948 mSDsluCounter, 12563 mSDsCounter, 0 mSdLazyCounter, 1717 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3967 SdHoareTripleChecker+Valid, 17238 SdHoareTripleChecker+Invalid, 1721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1717 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:20:36,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3967 Valid, 17238 Invalid, 1721 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [3 Valid, 1717 Invalid, 1 Unknown, 0 Unchecked, 14.3s Time] [2022-11-19 07:20:36,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5144 states. [2022-11-19 07:20:37,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5144 to 5136. [2022-11-19 07:20:37,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5136 states, 2870 states have (on average 1.2571428571428571) internal successors, (3608), 3025 states have internal predecessors, (3608), 1936 states have call successors, (1936), 336 states have call predecessors, (1936), 327 states have return successors, (2014), 1881 states have call predecessors, (2014), 1930 states have call successors, (2014) [2022-11-19 07:20:37,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5136 states to 5136 states and 7558 transitions. [2022-11-19 07:20:37,123 INFO L78 Accepts]: Start accepts. Automaton has 5136 states and 7558 transitions. Word has length 35 [2022-11-19 07:20:37,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:20:37,125 INFO L495 AbstractCegarLoop]: Abstraction has 5136 states and 7558 transitions. [2022-11-19 07:20:37,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-19 07:20:37,125 INFO L276 IsEmpty]: Start isEmpty. Operand 5136 states and 7558 transitions. [2022-11-19 07:20:37,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-19 07:20:37,128 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:20:37,128 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:20:37,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:20:37,129 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-19 07:20:37,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:20:37,130 INFO L85 PathProgramCache]: Analyzing trace with hash -347069175, now seen corresponding path program 1 times [2022-11-19 07:20:37,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:20:37,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979358595] [2022-11-19 07:20:37,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:20:37,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:20:37,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:20:38,973 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:20:38,974 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:20:38,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979358595] [2022-11-19 07:20:38,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979358595] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:20:38,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:20:38,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:20:38,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992906029] [2022-11-19 07:20:38,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:20:38,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:20:38,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:20:38,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:20:38,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:20:38,978 INFO L87 Difference]: Start difference. First operand 5136 states and 7558 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:20:41,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:20:51,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:20:51,216 INFO L93 Difference]: Finished difference Result 5146 states and 7567 transitions. [2022-11-19 07:20:51,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:20:51,217 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 40 [2022-11-19 07:20:51,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:20:51,261 INFO L225 Difference]: With dead ends: 5146 [2022-11-19 07:20:51,261 INFO L226 Difference]: Without dead ends: 5144 [2022-11-19 07:20:51,267 INFO L412 NwaCegarLoop]: 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 [2022-11-19 07:20:51,268 INFO L413 NwaCegarLoop]: 3681 mSDtfsCounter, 4074 mSDsluCounter, 7336 mSDsCounter, 0 mSdLazyCounter, 1286 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4091 SdHoareTripleChecker+Valid, 11017 SdHoareTripleChecker+Invalid, 1288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1286 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:20:51,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4091 Valid, 11017 Invalid, 1288 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 1286 Invalid, 1 Unknown, 0 Unchecked, 11.5s Time] [2022-11-19 07:20:51,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5144 states. [2022-11-19 07:20:51,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5144 to 5144. [2022-11-19 07:20:51,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5144 states, 2876 states have (on average 1.256606397774687) internal successors, (3614), 3031 states have internal predecessors, (3614), 1936 states have call successors, (1936), 338 states have call predecessors, (1936), 329 states have return successors, (2014), 1881 states have call predecessors, (2014), 1930 states have call successors, (2014) [2022-11-19 07:20:51,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5144 states to 5144 states and 7564 transitions. [2022-11-19 07:20:51,700 INFO L78 Accepts]: Start accepts. Automaton has 5144 states and 7564 transitions. Word has length 40 [2022-11-19 07:20:51,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:20:51,700 INFO L495 AbstractCegarLoop]: Abstraction has 5144 states and 7564 transitions. [2022-11-19 07:20:51,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:20:51,702 INFO L276 IsEmpty]: Start isEmpty. Operand 5144 states and 7564 transitions. [2022-11-19 07:20:51,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-19 07:20:51,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:20:51,704 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:20:51,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 07:20:51,705 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-19 07:20:51,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:20:51,707 INFO L85 PathProgramCache]: Analyzing trace with hash -718409188, now seen corresponding path program 1 times [2022-11-19 07:20:51,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:20:51,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508889659] [2022-11-19 07:20:51,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:20:51,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:20:52,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:20:53,399 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 07:20:53,399 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:20:53,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508889659] [2022-11-19 07:20:53,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508889659] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:20:53,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:20:53,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:20:53,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606538455] [2022-11-19 07:20:53,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:20:53,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:20:53,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:20:53,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:20:53,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:20:53,402 INFO L87 Difference]: Start difference. First operand 5144 states and 7564 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 07:20:55,539 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:21:04,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:21:04,562 INFO L93 Difference]: Finished difference Result 5154 states and 7573 transitions. [2022-11-19 07:21:04,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:21:04,563 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 45 [2022-11-19 07:21:04,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:21:04,598 INFO L225 Difference]: With dead ends: 5154 [2022-11-19 07:21:04,598 INFO L226 Difference]: Without dead ends: 5152 [2022-11-19 07:21:04,603 INFO L412 NwaCegarLoop]: 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 [2022-11-19 07:21:04,605 INFO L413 NwaCegarLoop]: 3681 mSDtfsCounter, 4074 mSDsluCounter, 7336 mSDsCounter, 0 mSdLazyCounter, 1286 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4090 SdHoareTripleChecker+Valid, 11017 SdHoareTripleChecker+Invalid, 1288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1286 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:21:04,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4090 Valid, 11017 Invalid, 1288 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 1286 Invalid, 1 Unknown, 0 Unchecked, 10.7s Time] [2022-11-19 07:21:04,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5152 states. [2022-11-19 07:21:04,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5152 to 5152. [2022-11-19 07:21:04,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5152 states, 2882 states have (on average 1.2560721721027064) internal successors, (3620), 3037 states have internal predecessors, (3620), 1936 states have call successors, (1936), 340 states have call predecessors, (1936), 331 states have return successors, (2014), 1881 states have call predecessors, (2014), 1930 states have call successors, (2014) [2022-11-19 07:21:04,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5152 states to 5152 states and 7570 transitions. [2022-11-19 07:21:04,996 INFO L78 Accepts]: Start accepts. Automaton has 5152 states and 7570 transitions. Word has length 45 [2022-11-19 07:21:04,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:21:04,997 INFO L495 AbstractCegarLoop]: Abstraction has 5152 states and 7570 transitions. [2022-11-19 07:21:04,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 07:21:04,998 INFO L276 IsEmpty]: Start isEmpty. Operand 5152 states and 7570 transitions. [2022-11-19 07:21:05,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-19 07:21:05,003 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:21:05,003 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:21:05,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 07:21:05,004 INFO L420 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)] === [2022-11-19 07:21:05,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:21:05,004 INFO L85 PathProgramCache]: Analyzing trace with hash 2138140841, now seen corresponding path program 1 times [2022-11-19 07:21:05,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:21:05,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451505619] [2022-11-19 07:21:05,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:21:05,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:21:05,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:21:06,936 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-19 07:21:06,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:21:06,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451505619] [2022-11-19 07:21:06,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451505619] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:21:06,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:21:06,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:21:06,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335878062] [2022-11-19 07:21:06,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:21:06,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:21:06,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:21:06,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:21:06,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:21:06,939 INFO L87 Difference]: Start difference. First operand 5152 states and 7570 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-19 07:21:09,077 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:21:17,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:21:17,102 INFO L93 Difference]: Finished difference Result 5162 states and 7579 transitions. [2022-11-19 07:21:17,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:21:17,103 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 50 [2022-11-19 07:21:17,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:21:17,137 INFO L225 Difference]: With dead ends: 5162 [2022-11-19 07:21:17,138 INFO L226 Difference]: Without dead ends: 5160 [2022-11-19 07:21:17,143 INFO L412 NwaCegarLoop]: 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 [2022-11-19 07:21:17,144 INFO L413 NwaCegarLoop]: 3681 mSDtfsCounter, 4074 mSDsluCounter, 7336 mSDsCounter, 0 mSdLazyCounter, 1286 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4089 SdHoareTripleChecker+Valid, 11017 SdHoareTripleChecker+Invalid, 1288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1286 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:21:17,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4089 Valid, 11017 Invalid, 1288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1286 Invalid, 1 Unknown, 0 Unchecked, 9.7s Time] [2022-11-19 07:21:17,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5160 states. [2022-11-19 07:21:17,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5160 to 5160. [2022-11-19 07:21:17,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5160 states, 2888 states have (on average 1.255540166204986) internal successors, (3626), 3043 states have internal predecessors, (3626), 1936 states have call successors, (1936), 342 states have call predecessors, (1936), 333 states have return successors, (2014), 1881 states have call predecessors, (2014), 1930 states have call successors, (2014) [2022-11-19 07:21:17,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5160 states to 5160 states and 7576 transitions. [2022-11-19 07:21:17,588 INFO L78 Accepts]: Start accepts. Automaton has 5160 states and 7576 transitions. Word has length 50 [2022-11-19 07:21:17,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:21:17,589 INFO L495 AbstractCegarLoop]: Abstraction has 5160 states and 7576 transitions. [2022-11-19 07:21:17,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-19 07:21:17,589 INFO L276 IsEmpty]: Start isEmpty. Operand 5160 states and 7576 transitions. [2022-11-19 07:21:17,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-19 07:21:17,596 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:21:17,596 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:21:17,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 07:21:17,597 INFO L420 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)] === [2022-11-19 07:21:17,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:21:17,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1167779332, now seen corresponding path program 1 times [2022-11-19 07:21:17,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:21:17,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260035237] [2022-11-19 07:21:17,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:21:17,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:21:17,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:21:19,170 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-19 07:21:19,171 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:21:19,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260035237] [2022-11-19 07:21:19,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260035237] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:21:19,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:21:19,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:21:19,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683059718] [2022-11-19 07:21:19,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:21:19,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:21:19,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:21:19,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:21:19,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:21:19,174 INFO L87 Difference]: Start difference. First operand 5160 states and 7576 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-19 07:21:21,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:21:29,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:21:29,743 INFO L93 Difference]: Finished difference Result 5170 states and 7585 transitions. [2022-11-19 07:21:29,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:21:29,744 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 55 [2022-11-19 07:21:29,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:21:29,778 INFO L225 Difference]: With dead ends: 5170 [2022-11-19 07:21:29,778 INFO L226 Difference]: Without dead ends: 5168 [2022-11-19 07:21:29,781 INFO L412 NwaCegarLoop]: 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 [2022-11-19 07:21:29,782 INFO L413 NwaCegarLoop]: 3681 mSDtfsCounter, 4074 mSDsluCounter, 7336 mSDsCounter, 0 mSdLazyCounter, 1286 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4088 SdHoareTripleChecker+Valid, 11017 SdHoareTripleChecker+Invalid, 1288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1286 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:21:29,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4088 Valid, 11017 Invalid, 1288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1286 Invalid, 1 Unknown, 0 Unchecked, 10.1s Time] [2022-11-19 07:21:29,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5168 states. [2022-11-19 07:21:30,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5168 to 5168. [2022-11-19 07:21:30,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5168 states, 2894 states have (on average 1.2550103662750518) internal successors, (3632), 3049 states have internal predecessors, (3632), 1936 states have call successors, (1936), 344 states have call predecessors, (1936), 335 states have return successors, (2014), 1881 states have call predecessors, (2014), 1930 states have call successors, (2014) [2022-11-19 07:21:30,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5168 states to 5168 states and 7582 transitions. [2022-11-19 07:21:30,188 INFO L78 Accepts]: Start accepts. Automaton has 5168 states and 7582 transitions. Word has length 55 [2022-11-19 07:21:30,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:21:30,188 INFO L495 AbstractCegarLoop]: Abstraction has 5168 states and 7582 transitions. [2022-11-19 07:21:30,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-19 07:21:30,189 INFO L276 IsEmpty]: Start isEmpty. Operand 5168 states and 7582 transitions. [2022-11-19 07:21:30,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-19 07:21:30,190 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:21:30,190 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:21:30,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 07:21:30,191 INFO L420 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)] === [2022-11-19 07:21:30,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:21:30,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1343382601, now seen corresponding path program 1 times [2022-11-19 07:21:30,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:21:30,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304672582] [2022-11-19 07:21:30,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:21:30,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:21:30,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:21:31,697 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-19 07:21:31,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:21:31,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304672582] [2022-11-19 07:21:31,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304672582] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:21:31,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:21:31,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:21:31,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858743010] [2022-11-19 07:21:31,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:21:31,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:21:31,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:21:31,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:21:31,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:21:31,700 INFO L87 Difference]: Start difference. First operand 5168 states and 7582 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-19 07:21:33,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:21:42,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:21:42,454 INFO L93 Difference]: Finished difference Result 5178 states and 7591 transitions. [2022-11-19 07:21:42,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:21:42,455 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 60 [2022-11-19 07:21:42,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:21:42,489 INFO L225 Difference]: With dead ends: 5178 [2022-11-19 07:21:42,489 INFO L226 Difference]: Without dead ends: 5176 [2022-11-19 07:21:42,492 INFO L412 NwaCegarLoop]: 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 [2022-11-19 07:21:42,493 INFO L413 NwaCegarLoop]: 3681 mSDtfsCounter, 4074 mSDsluCounter, 7336 mSDsCounter, 0 mSdLazyCounter, 1286 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4087 SdHoareTripleChecker+Valid, 11017 SdHoareTripleChecker+Invalid, 1288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1286 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:21:42,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4087 Valid, 11017 Invalid, 1288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1286 Invalid, 1 Unknown, 0 Unchecked, 10.3s Time] [2022-11-19 07:21:42,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5176 states. [2022-11-19 07:21:42,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5176 to 5176. [2022-11-19 07:21:42,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5176 states, 2900 states have (on average 1.2544827586206897) internal successors, (3638), 3055 states have internal predecessors, (3638), 1936 states have call successors, (1936), 346 states have call predecessors, (1936), 337 states have return successors, (2014), 1881 states have call predecessors, (2014), 1930 states have call successors, (2014) [2022-11-19 07:21:42,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5176 states to 5176 states and 7588 transitions. [2022-11-19 07:21:42,943 INFO L78 Accepts]: Start accepts. Automaton has 5176 states and 7588 transitions. Word has length 60 [2022-11-19 07:21:42,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:21:42,944 INFO L495 AbstractCegarLoop]: Abstraction has 5176 states and 7588 transitions. [2022-11-19 07:21:42,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-19 07:21:42,944 INFO L276 IsEmpty]: Start isEmpty. Operand 5176 states and 7588 transitions. [2022-11-19 07:21:42,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-19 07:21:42,945 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:21:42,946 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:21:42,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 07:21:42,946 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-19 07:21:42,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:21:42,947 INFO L85 PathProgramCache]: Analyzing trace with hash 646910554, now seen corresponding path program 1 times [2022-11-19 07:21:42,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:21:42,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774357501] [2022-11-19 07:21:42,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:21:42,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:21:43,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:21:44,443 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-19 07:21:44,443 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:21:44,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774357501] [2022-11-19 07:21:44,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774357501] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:21:44,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:21:44,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:21:44,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458098988] [2022-11-19 07:21:44,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:21:44,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:21:44,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:21:44,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:21:44,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:21:44,445 INFO L87 Difference]: Start difference. First operand 5176 states and 7588 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-19 07:21:46,573 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:21:56,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:21:56,270 INFO L93 Difference]: Finished difference Result 5186 states and 7597 transitions. [2022-11-19 07:21:56,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:21:56,271 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 66 [2022-11-19 07:21:56,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:21:56,300 INFO L225 Difference]: With dead ends: 5186 [2022-11-19 07:21:56,300 INFO L226 Difference]: Without dead ends: 5184 [2022-11-19 07:21:56,304 INFO L412 NwaCegarLoop]: 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 [2022-11-19 07:21:56,305 INFO L413 NwaCegarLoop]: 3681 mSDtfsCounter, 4073 mSDsluCounter, 7336 mSDsCounter, 0 mSdLazyCounter, 1286 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4085 SdHoareTripleChecker+Valid, 11017 SdHoareTripleChecker+Invalid, 1288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1286 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:21:56,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4085 Valid, 11017 Invalid, 1288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1286 Invalid, 1 Unknown, 0 Unchecked, 11.2s Time] [2022-11-19 07:21:56,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5184 states. [2022-11-19 07:21:56,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5184 to 5184. [2022-11-19 07:21:56,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5184 states, 2906 states have (on average 1.2539573296627666) internal successors, (3644), 3061 states have internal predecessors, (3644), 1936 states have call successors, (1936), 348 states have call predecessors, (1936), 339 states have return successors, (2014), 1881 states have call predecessors, (2014), 1930 states have call successors, (2014) [2022-11-19 07:21:56,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5184 states to 5184 states and 7594 transitions. [2022-11-19 07:21:56,738 INFO L78 Accepts]: Start accepts. Automaton has 5184 states and 7594 transitions. Word has length 66 [2022-11-19 07:21:56,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:21:56,739 INFO L495 AbstractCegarLoop]: Abstraction has 5184 states and 7594 transitions. [2022-11-19 07:21:56,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-19 07:21:56,739 INFO L276 IsEmpty]: Start isEmpty. Operand 5184 states and 7594 transitions. [2022-11-19 07:21:56,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-19 07:21:56,741 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:21:56,741 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:21:56,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 07:21:56,742 INFO L420 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)] === [2022-11-19 07:21:56,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:21:56,742 INFO L85 PathProgramCache]: Analyzing trace with hash 532742121, now seen corresponding path program 1 times [2022-11-19 07:21:56,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:21:56,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733845080] [2022-11-19 07:21:56,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:21:56,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:21:57,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:21:58,355 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-19 07:21:58,355 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:21:58,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733845080] [2022-11-19 07:21:58,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733845080] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:21:58,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:21:58,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:21:58,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328306191] [2022-11-19 07:21:58,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:21:58,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:21:58,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:21:58,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:21:58,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:21:58,357 INFO L87 Difference]: Start difference. First operand 5184 states and 7594 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-19 07:22:00,507 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:22:14,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:22:14,395 INFO L93 Difference]: Finished difference Result 7329 states and 10612 transitions. [2022-11-19 07:22:14,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:22:14,395 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 70 [2022-11-19 07:22:14,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:22:14,434 INFO L225 Difference]: With dead ends: 7329 [2022-11-19 07:22:14,435 INFO L226 Difference]: Without dead ends: 7327 [2022-11-19 07:22:14,440 INFO L412 NwaCegarLoop]: 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 [2022-11-19 07:22:14,441 INFO L413 NwaCegarLoop]: 4963 mSDtfsCounter, 3048 mSDsluCounter, 12206 mSDsCounter, 0 mSdLazyCounter, 1921 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3059 SdHoareTripleChecker+Valid, 17169 SdHoareTripleChecker+Invalid, 1924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1921 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:22:14,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3059 Valid, 17169 Invalid, 1924 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 1921 Invalid, 1 Unknown, 0 Unchecked, 15.2s Time] [2022-11-19 07:22:14,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7327 states. [2022-11-19 07:22:15,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7327 to 7319. [2022-11-19 07:22:15,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7319 states, 4107 states have (on average 1.2434867299732164) internal successors, (5107), 4299 states have internal predecessors, (5107), 2677 states have call successors, (2677), 549 states have call predecessors, (2677), 532 states have return successors, (2819), 2608 states have call predecessors, (2819), 2671 states have call successors, (2819) [2022-11-19 07:22:15,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7319 states to 7319 states and 10603 transitions. [2022-11-19 07:22:15,140 INFO L78 Accepts]: Start accepts. Automaton has 7319 states and 10603 transitions. Word has length 70 [2022-11-19 07:22:15,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:22:15,141 INFO L495 AbstractCegarLoop]: Abstraction has 7319 states and 10603 transitions. [2022-11-19 07:22:15,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-19 07:22:15,142 INFO L276 IsEmpty]: Start isEmpty. Operand 7319 states and 10603 transitions. [2022-11-19 07:22:15,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-19 07:22:15,143 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:22:15,143 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:22:15,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 07:22:15,144 INFO L420 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)] === [2022-11-19 07:22:15,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:22:15,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1713467836, now seen corresponding path program 1 times [2022-11-19 07:22:15,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:22:15,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321246241] [2022-11-19 07:22:15,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:22:15,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:22:15,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:22:16,740 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-11-19 07:22:16,740 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:22:16,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321246241] [2022-11-19 07:22:16,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321246241] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:22:16,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:22:16,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:22:16,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486554760] [2022-11-19 07:22:16,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:22:16,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:22:16,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:22:16,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:22:16,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:22:16,743 INFO L87 Difference]: Start difference. First operand 7319 states and 10603 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-19 07:22:18,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:22:27,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:22:27,496 INFO L93 Difference]: Finished difference Result 7329 states and 10612 transitions. [2022-11-19 07:22:27,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:22:27,497 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 75 [2022-11-19 07:22:27,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:22:27,535 INFO L225 Difference]: With dead ends: 7329 [2022-11-19 07:22:27,535 INFO L226 Difference]: Without dead ends: 7327 [2022-11-19 07:22:27,540 INFO L412 NwaCegarLoop]: 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 [2022-11-19 07:22:27,541 INFO L413 NwaCegarLoop]: 3681 mSDtfsCounter, 4074 mSDsluCounter, 7336 mSDsCounter, 0 mSdLazyCounter, 1286 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4084 SdHoareTripleChecker+Valid, 11017 SdHoareTripleChecker+Invalid, 1288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1286 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:22:27,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4084 Valid, 11017 Invalid, 1288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1286 Invalid, 1 Unknown, 0 Unchecked, 10.0s Time] [2022-11-19 07:22:27,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7327 states. [2022-11-19 07:22:28,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7327 to 7327. [2022-11-19 07:22:28,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7327 states, 4113 states have (on average 1.2431315341599805) internal successors, (5113), 4305 states have internal predecessors, (5113), 2677 states have call successors, (2677), 551 states have call predecessors, (2677), 534 states have return successors, (2819), 2608 states have call predecessors, (2819), 2671 states have call successors, (2819) [2022-11-19 07:22:28,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7327 states to 7327 states and 10609 transitions. [2022-11-19 07:22:28,313 INFO L78 Accepts]: Start accepts. Automaton has 7327 states and 10609 transitions. Word has length 75 [2022-11-19 07:22:28,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:22:28,314 INFO L495 AbstractCegarLoop]: Abstraction has 7327 states and 10609 transitions. [2022-11-19 07:22:28,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-19 07:22:28,315 INFO L276 IsEmpty]: Start isEmpty. Operand 7327 states and 10609 transitions. [2022-11-19 07:22:28,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-19 07:22:28,316 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:22:28,317 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:22:28,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 07:22:28,317 INFO L420 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)] === [2022-11-19 07:22:28,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:22:28,318 INFO L85 PathProgramCache]: Analyzing trace with hash -263323829, now seen corresponding path program 1 times [2022-11-19 07:22:28,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:22:28,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149924774] [2022-11-19 07:22:28,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:22:28,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:22:28,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:22:29,784 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-19 07:22:29,784 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:22:29,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149924774] [2022-11-19 07:22:29,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149924774] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:22:29,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:22:29,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:22:29,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773905217] [2022-11-19 07:22:29,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:22:29,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:22:29,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:22:29,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:22:29,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:22:29,786 INFO L87 Difference]: Start difference. First operand 7327 states and 10609 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-19 07:22:31,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:22:42,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:22:42,073 INFO L93 Difference]: Finished difference Result 7337 states and 10618 transitions. [2022-11-19 07:22:42,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:22:42,073 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 81 [2022-11-19 07:22:42,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:22:42,108 INFO L225 Difference]: With dead ends: 7337 [2022-11-19 07:22:42,108 INFO L226 Difference]: Without dead ends: 7335 [2022-11-19 07:22:42,114 INFO L412 NwaCegarLoop]: 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 [2022-11-19 07:22:42,115 INFO L413 NwaCegarLoop]: 3681 mSDtfsCounter, 4073 mSDsluCounter, 7336 mSDsCounter, 0 mSdLazyCounter, 1286 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4082 SdHoareTripleChecker+Valid, 11017 SdHoareTripleChecker+Invalid, 1288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1286 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:22:42,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4082 Valid, 11017 Invalid, 1288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1286 Invalid, 1 Unknown, 0 Unchecked, 11.6s Time] [2022-11-19 07:22:42,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7335 states. [2022-11-19 07:22:42,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7335 to 7335. [2022-11-19 07:22:42,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7335 states, 4119 states have (on average 1.2427773731488225) internal successors, (5119), 4311 states have internal predecessors, (5119), 2677 states have call successors, (2677), 553 states have call predecessors, (2677), 536 states have return successors, (2819), 2608 states have call predecessors, (2819), 2671 states have call successors, (2819) [2022-11-19 07:22:42,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7335 states to 7335 states and 10615 transitions. [2022-11-19 07:22:42,807 INFO L78 Accepts]: Start accepts. Automaton has 7335 states and 10615 transitions. Word has length 81 [2022-11-19 07:22:42,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:22:42,808 INFO L495 AbstractCegarLoop]: Abstraction has 7335 states and 10615 transitions. [2022-11-19 07:22:42,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-19 07:22:42,808 INFO L276 IsEmpty]: Start isEmpty. Operand 7335 states and 10615 transitions. [2022-11-19 07:22:42,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-19 07:22:42,809 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:22:42,809 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:22:42,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 07:22:42,810 INFO L420 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)] === [2022-11-19 07:22:42,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:22:42,811 INFO L85 PathProgramCache]: Analyzing trace with hash -665784550, now seen corresponding path program 1 times [2022-11-19 07:22:42,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:22:42,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201688779] [2022-11-19 07:22:42,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:22:42,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:22:43,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:22:44,072 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2022-11-19 07:22:44,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:22:44,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201688779] [2022-11-19 07:22:44,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201688779] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:22:44,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:22:44,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:22:44,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576475555] [2022-11-19 07:22:44,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:22:44,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:22:44,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:22:44,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:22:44,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:22:44,075 INFO L87 Difference]: Start difference. First operand 7335 states and 10615 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-19 07:22:46,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:22:55,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:22:55,547 INFO L93 Difference]: Finished difference Result 7345 states and 10624 transitions. [2022-11-19 07:22:55,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:22:55,548 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 86 [2022-11-19 07:22:55,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:22:55,579 INFO L225 Difference]: With dead ends: 7345 [2022-11-19 07:22:55,579 INFO L226 Difference]: Without dead ends: 7343 [2022-11-19 07:22:55,584 INFO L412 NwaCegarLoop]: 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 [2022-11-19 07:22:55,585 INFO L413 NwaCegarLoop]: 3681 mSDtfsCounter, 4073 mSDsluCounter, 7336 mSDsCounter, 0 mSdLazyCounter, 1286 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4081 SdHoareTripleChecker+Valid, 11017 SdHoareTripleChecker+Invalid, 1288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1286 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:22:55,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4081 Valid, 11017 Invalid, 1288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1286 Invalid, 1 Unknown, 0 Unchecked, 10.7s Time] [2022-11-19 07:22:55,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7343 states. [2022-11-19 07:22:56,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7343 to 7343. [2022-11-19 07:22:56,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7343 states, 4125 states have (on average 1.2424242424242424) internal successors, (5125), 4317 states have internal predecessors, (5125), 2677 states have call successors, (2677), 555 states have call predecessors, (2677), 538 states have return successors, (2819), 2608 states have call predecessors, (2819), 2671 states have call successors, (2819) [2022-11-19 07:22:56,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7343 states to 7343 states and 10621 transitions. [2022-11-19 07:22:56,406 INFO L78 Accepts]: Start accepts. Automaton has 7343 states and 10621 transitions. Word has length 86 [2022-11-19 07:22:56,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:22:56,406 INFO L495 AbstractCegarLoop]: Abstraction has 7343 states and 10621 transitions. [2022-11-19 07:22:56,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-19 07:22:56,407 INFO L276 IsEmpty]: Start isEmpty. Operand 7343 states and 10621 transitions. [2022-11-19 07:22:56,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-19 07:22:56,408 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:22:56,409 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:22:56,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-19 07:22:56,409 INFO L420 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)] === [2022-11-19 07:22:56,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:22:56,410 INFO L85 PathProgramCache]: Analyzing trace with hash -419483863, now seen corresponding path program 1 times [2022-11-19 07:22:56,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:22:56,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052470407] [2022-11-19 07:22:56,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:22:56,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:22:56,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:22:57,823 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-11-19 07:22:57,824 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:22:57,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052470407] [2022-11-19 07:22:57,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052470407] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:22:57,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:22:57,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:22:57,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987609544] [2022-11-19 07:22:57,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:22:57,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:22:57,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:22:57,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:22:57,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:22:57,826 INFO L87 Difference]: Start difference. First operand 7343 states and 10621 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-19 07:22:59,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:23:10,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:23:10,046 INFO L93 Difference]: Finished difference Result 7353 states and 10630 transitions. [2022-11-19 07:23:10,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:23:10,047 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 90 [2022-11-19 07:23:10,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:23:10,071 INFO L225 Difference]: With dead ends: 7353 [2022-11-19 07:23:10,071 INFO L226 Difference]: Without dead ends: 7351 [2022-11-19 07:23:10,076 INFO L412 NwaCegarLoop]: 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 [2022-11-19 07:23:10,077 INFO L413 NwaCegarLoop]: 3681 mSDtfsCounter, 4074 mSDsluCounter, 7336 mSDsCounter, 0 mSdLazyCounter, 1286 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4081 SdHoareTripleChecker+Valid, 11017 SdHoareTripleChecker+Invalid, 1288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1286 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:23:10,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4081 Valid, 11017 Invalid, 1288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1286 Invalid, 1 Unknown, 0 Unchecked, 11.4s Time] [2022-11-19 07:23:10,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7351 states. [2022-11-19 07:23:10,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7351 to 7351. [2022-11-19 07:23:10,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7351 states, 4131 states have (on average 1.242072137496974) internal successors, (5131), 4323 states have internal predecessors, (5131), 2677 states have call successors, (2677), 557 states have call predecessors, (2677), 540 states have return successors, (2819), 2608 states have call predecessors, (2819), 2671 states have call successors, (2819) [2022-11-19 07:23:10,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7351 states to 7351 states and 10627 transitions. [2022-11-19 07:23:10,837 INFO L78 Accepts]: Start accepts. Automaton has 7351 states and 10627 transitions. Word has length 90 [2022-11-19 07:23:10,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:23:10,837 INFO L495 AbstractCegarLoop]: Abstraction has 7351 states and 10627 transitions. [2022-11-19 07:23:10,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-19 07:23:10,838 INFO L276 IsEmpty]: Start isEmpty. Operand 7351 states and 10627 transitions. [2022-11-19 07:23:10,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-19 07:23:10,840 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:23:10,840 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:23:10,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-19 07:23:10,840 INFO L420 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)] === [2022-11-19 07:23:10,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:23:10,841 INFO L85 PathProgramCache]: Analyzing trace with hash 387131772, now seen corresponding path program 1 times [2022-11-19 07:23:10,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:23:10,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276883034] [2022-11-19 07:23:10,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:23:10,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:23:11,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:23:12,018 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2022-11-19 07:23:12,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:23:12,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276883034] [2022-11-19 07:23:12,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276883034] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:23:12,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:23:12,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:23:12,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167111622] [2022-11-19 07:23:12,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:23:12,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:23:12,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:23:12,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:23:12,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:23:12,021 INFO L87 Difference]: Start difference. First operand 7351 states and 10627 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-19 07:23:14,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:23:23,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:23:23,726 INFO L93 Difference]: Finished difference Result 7481 states and 10745 transitions. [2022-11-19 07:23:23,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:23:23,727 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 95 [2022-11-19 07:23:23,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:23:23,753 INFO L225 Difference]: With dead ends: 7481 [2022-11-19 07:23:23,753 INFO L226 Difference]: Without dead ends: 7479 [2022-11-19 07:23:23,758 INFO L412 NwaCegarLoop]: 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 [2022-11-19 07:23:23,759 INFO L413 NwaCegarLoop]: 3703 mSDtfsCounter, 4038 mSDsluCounter, 7442 mSDsCounter, 0 mSdLazyCounter, 1296 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4044 SdHoareTripleChecker+Valid, 11145 SdHoareTripleChecker+Invalid, 1299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1296 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:23:23,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4044 Valid, 11145 Invalid, 1299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1296 Invalid, 1 Unknown, 0 Unchecked, 10.8s Time] [2022-11-19 07:23:23,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7479 states. [2022-11-19 07:23:24,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7479 to 7477. [2022-11-19 07:23:24,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7477 states, 4207 states have (on average 1.2400760637033517) internal successors, (5217), 4401 states have internal predecessors, (5217), 2691 states have call successors, (2691), 593 states have call predecessors, (2691), 576 states have return successors, (2833), 2622 states have call predecessors, (2833), 2685 states have call successors, (2833) [2022-11-19 07:23:24,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7477 states to 7477 states and 10741 transitions. [2022-11-19 07:23:24,680 INFO L78 Accepts]: Start accepts. Automaton has 7477 states and 10741 transitions. Word has length 95 [2022-11-19 07:23:24,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:23:24,681 INFO L495 AbstractCegarLoop]: Abstraction has 7477 states and 10741 transitions. [2022-11-19 07:23:24,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-19 07:23:24,682 INFO L276 IsEmpty]: Start isEmpty. Operand 7477 states and 10741 transitions. [2022-11-19 07:23:24,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-19 07:23:24,684 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:23:24,685 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:23:24,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-19 07:23:24,685 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-19 07:23:24,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:23:24,686 INFO L85 PathProgramCache]: Analyzing trace with hash -61001036, now seen corresponding path program 1 times [2022-11-19 07:23:24,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:23:24,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826940112] [2022-11-19 07:23:24,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:23:24,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:23:25,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:23:27,515 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-11-19 07:23:27,515 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:23:27,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826940112] [2022-11-19 07:23:27,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826940112] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:23:27,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:23:27,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:23:27,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931902606] [2022-11-19 07:23:27,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:23:27,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:23:27,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:23:27,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:23:27,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:23:27,518 INFO L87 Difference]: Start difference. First operand 7477 states and 10741 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-19 07:23:29,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:23:43,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:23:43,910 INFO L93 Difference]: Finished difference Result 7495 states and 10756 transitions. [2022-11-19 07:23:43,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:23:43,911 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 114 [2022-11-19 07:23:43,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:23:43,945 INFO L225 Difference]: With dead ends: 7495 [2022-11-19 07:23:43,946 INFO L226 Difference]: Without dead ends: 7493 [2022-11-19 07:23:43,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:23:43,953 INFO L413 NwaCegarLoop]: 4962 mSDtfsCounter, 3038 mSDsluCounter, 12222 mSDsCounter, 0 mSdLazyCounter, 1911 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3043 SdHoareTripleChecker+Valid, 17184 SdHoareTripleChecker+Invalid, 1914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1911 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:23:43,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3043 Valid, 17184 Invalid, 1914 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 1911 Invalid, 1 Unknown, 0 Unchecked, 15.5s Time] [2022-11-19 07:23:43,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7493 states. [2022-11-19 07:23:44,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7493 to 7485. [2022-11-19 07:23:44,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7485 states, 4213 states have (on average 1.2397341561832425) internal successors, (5223), 4407 states have internal predecessors, (5223), 2691 states have call successors, (2691), 595 states have call predecessors, (2691), 578 states have return successors, (2833), 2622 states have call predecessors, (2833), 2685 states have call successors, (2833) [2022-11-19 07:23:44,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7485 states to 7485 states and 10747 transitions. [2022-11-19 07:23:44,780 INFO L78 Accepts]: Start accepts. Automaton has 7485 states and 10747 transitions. Word has length 114 [2022-11-19 07:23:44,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:23:44,781 INFO L495 AbstractCegarLoop]: Abstraction has 7485 states and 10747 transitions. [2022-11-19 07:23:44,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-19 07:23:44,781 INFO L276 IsEmpty]: Start isEmpty. Operand 7485 states and 10747 transitions. [2022-11-19 07:23:44,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-19 07:23:44,784 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:23:44,784 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:23:44,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-19 07:23:44,785 INFO L420 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)] === [2022-11-19 07:23:44,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:23:44,786 INFO L85 PathProgramCache]: Analyzing trace with hash 254544267, now seen corresponding path program 1 times [2022-11-19 07:23:44,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:23:44,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85955657] [2022-11-19 07:23:44,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:23:44,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:23:45,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:23:46,299 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked. [2022-11-19 07:23:46,299 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:23:46,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85955657] [2022-11-19 07:23:46,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85955657] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:23:46,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:23:46,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:23:46,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806815844] [2022-11-19 07:23:46,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:23:46,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:23:46,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:23:46,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:23:46,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:23:46,301 INFO L87 Difference]: Start difference. First operand 7485 states and 10747 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-19 07:23:48,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:23:58,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:23:58,189 INFO L93 Difference]: Finished difference Result 7561 states and 10799 transitions. [2022-11-19 07:23:58,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:23:58,190 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 101 [2022-11-19 07:23:58,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:23:58,210 INFO L225 Difference]: With dead ends: 7561 [2022-11-19 07:23:58,210 INFO L226 Difference]: Without dead ends: 7559 [2022-11-19 07:23:58,213 INFO L412 NwaCegarLoop]: 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 [2022-11-19 07:23:58,213 INFO L413 NwaCegarLoop]: 3686 mSDtfsCounter, 4018 mSDsluCounter, 7426 mSDsCounter, 0 mSdLazyCounter, 1304 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4023 SdHoareTripleChecker+Valid, 11112 SdHoareTripleChecker+Invalid, 1307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1304 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:23:58,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4023 Valid, 11112 Invalid, 1307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1304 Invalid, 1 Unknown, 0 Unchecked, 10.9s Time] [2022-11-19 07:23:58,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7559 states. [2022-11-19 07:23:58,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7559 to 7557. [2022-11-19 07:23:58,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7557 states, 4257 states have (on average 1.2381959126145172) internal successors, (5271), 4451 states have internal predecessors, (5271), 2691 states have call successors, (2691), 623 states have call predecessors, (2691), 606 states have return successors, (2833), 2622 states have call predecessors, (2833), 2685 states have call successors, (2833) [2022-11-19 07:23:58,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7557 states to 7557 states and 10795 transitions. [2022-11-19 07:23:58,956 INFO L78 Accepts]: Start accepts. Automaton has 7557 states and 10795 transitions. Word has length 101 [2022-11-19 07:23:58,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:23:58,956 INFO L495 AbstractCegarLoop]: Abstraction has 7557 states and 10795 transitions. [2022-11-19 07:23:58,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-19 07:23:58,956 INFO L276 IsEmpty]: Start isEmpty. Operand 7557 states and 10795 transitions. [2022-11-19 07:23:58,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-11-19 07:23:58,958 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:23:58,958 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:23:58,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-19 07:23:58,960 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-19 07:23:58,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:23:58,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1181550940, now seen corresponding path program 1 times [2022-11-19 07:23:58,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:23:58,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212773722] [2022-11-19 07:23:58,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:23:58,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:23:59,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:00,467 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 375 trivial. 0 not checked. [2022-11-19 07:24:00,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:24:00,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212773722] [2022-11-19 07:24:00,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212773722] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:24:00,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:24:00,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:24:00,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782568454] [2022-11-19 07:24:00,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:24:00,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:24:00,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:24:00,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:24:00,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:24:00,470 INFO L87 Difference]: Start difference. First operand 7557 states and 10795 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-19 07:24:02,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:24:14,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:24:14,159 INFO L93 Difference]: Finished difference Result 7567 states and 10804 transitions. [2022-11-19 07:24:14,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:24:14,160 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 105 [2022-11-19 07:24:14,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:24:14,180 INFO L225 Difference]: With dead ends: 7567 [2022-11-19 07:24:14,180 INFO L226 Difference]: Without dead ends: 7565 [2022-11-19 07:24:14,183 INFO L412 NwaCegarLoop]: 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 [2022-11-19 07:24:14,184 INFO L413 NwaCegarLoop]: 3681 mSDtfsCounter, 4074 mSDsluCounter, 7336 mSDsCounter, 0 mSdLazyCounter, 1286 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4078 SdHoareTripleChecker+Valid, 11017 SdHoareTripleChecker+Invalid, 1288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1286 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:24:14,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4078 Valid, 11017 Invalid, 1288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1286 Invalid, 1 Unknown, 0 Unchecked, 12.6s Time] [2022-11-19 07:24:14,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7565 states. [2022-11-19 07:24:14,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7565 to 7565. [2022-11-19 07:24:14,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7565 states, 4263 states have (on average 1.2378606615059817) internal successors, (5277), 4457 states have internal predecessors, (5277), 2691 states have call successors, (2691), 625 states have call predecessors, (2691), 608 states have return successors, (2833), 2622 states have call predecessors, (2833), 2685 states have call successors, (2833) [2022-11-19 07:24:14,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7565 states to 7565 states and 10801 transitions. [2022-11-19 07:24:14,855 INFO L78 Accepts]: Start accepts. Automaton has 7565 states and 10801 transitions. Word has length 105 [2022-11-19 07:24:14,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:24:14,856 INFO L495 AbstractCegarLoop]: Abstraction has 7565 states and 10801 transitions. [2022-11-19 07:24:14,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-19 07:24:14,856 INFO L276 IsEmpty]: Start isEmpty. Operand 7565 states and 10801 transitions. [2022-11-19 07:24:14,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-19 07:24:14,859 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:24:14,859 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:24:14,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-19 07:24:14,860 INFO L420 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)] === [2022-11-19 07:24:14,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:24:14,861 INFO L85 PathProgramCache]: Analyzing trace with hash -410174805, now seen corresponding path program 1 times [2022-11-19 07:24:14,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:24:14,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812499311] [2022-11-19 07:24:14,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:14,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:24:15,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:16,164 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 431 trivial. 0 not checked. [2022-11-19 07:24:16,165 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:24:16,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812499311] [2022-11-19 07:24:16,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812499311] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:24:16,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:24:16,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:24:16,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001653694] [2022-11-19 07:24:16,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:24:16,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:24:16,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:24:16,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:24:16,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:24:16,167 INFO L87 Difference]: Start difference. First operand 7565 states and 10801 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-19 07:24:18,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:24:27,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:24:27,592 INFO L93 Difference]: Finished difference Result 7575 states and 10810 transitions. [2022-11-19 07:24:27,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:24:27,592 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 111 [2022-11-19 07:24:27,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:24:27,617 INFO L225 Difference]: With dead ends: 7575 [2022-11-19 07:24:27,617 INFO L226 Difference]: Without dead ends: 7573 [2022-11-19 07:24:27,621 INFO L412 NwaCegarLoop]: 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 [2022-11-19 07:24:27,621 INFO L413 NwaCegarLoop]: 3681 mSDtfsCounter, 4073 mSDsluCounter, 7336 mSDsCounter, 0 mSdLazyCounter, 1286 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4076 SdHoareTripleChecker+Valid, 11017 SdHoareTripleChecker+Invalid, 1288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1286 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:24:27,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4076 Valid, 11017 Invalid, 1288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1286 Invalid, 1 Unknown, 0 Unchecked, 10.4s Time] [2022-11-19 07:24:27,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7573 states. [2022-11-19 07:24:28,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7573 to 7573. [2022-11-19 07:24:28,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7573 states, 4269 states have (on average 1.2375263527758258) internal successors, (5283), 4463 states have internal predecessors, (5283), 2691 states have call successors, (2691), 627 states have call predecessors, (2691), 610 states have return successors, (2833), 2622 states have call predecessors, (2833), 2685 states have call successors, (2833) [2022-11-19 07:24:28,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7573 states to 7573 states and 10807 transitions. [2022-11-19 07:24:28,246 INFO L78 Accepts]: Start accepts. Automaton has 7573 states and 10807 transitions. Word has length 111 [2022-11-19 07:24:28,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:24:28,246 INFO L495 AbstractCegarLoop]: Abstraction has 7573 states and 10807 transitions. [2022-11-19 07:24:28,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-19 07:24:28,247 INFO L276 IsEmpty]: Start isEmpty. Operand 7573 states and 10807 transitions. [2022-11-19 07:24:28,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-19 07:24:28,250 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:24:28,250 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:24:28,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-19 07:24:28,251 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-19 07:24:28,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:24:28,251 INFO L85 PathProgramCache]: Analyzing trace with hash -488743366, now seen corresponding path program 1 times [2022-11-19 07:24:28,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:24:28,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126798789] [2022-11-19 07:24:28,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:28,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:24:28,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:29,322 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 491 trivial. 0 not checked. [2022-11-19 07:24:29,323 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:24:29,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126798789] [2022-11-19 07:24:29,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126798789] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:24:29,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:24:29,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:24:29,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576059828] [2022-11-19 07:24:29,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:24:29,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:24:29,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:24:29,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:24:29,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:24:29,326 INFO L87 Difference]: Start difference. First operand 7573 states and 10807 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (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) [2022-11-19 07:24:31,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:24:41,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:24:41,228 INFO L93 Difference]: Finished difference Result 7583 states and 10816 transitions. [2022-11-19 07:24:41,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:24:41,228 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (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 116 [2022-11-19 07:24:41,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:24:41,252 INFO L225 Difference]: With dead ends: 7583 [2022-11-19 07:24:41,252 INFO L226 Difference]: Without dead ends: 7581 [2022-11-19 07:24:41,256 INFO L412 NwaCegarLoop]: 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 [2022-11-19 07:24:41,257 INFO L413 NwaCegarLoop]: 3681 mSDtfsCounter, 4073 mSDsluCounter, 7336 mSDsCounter, 0 mSdLazyCounter, 1286 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4075 SdHoareTripleChecker+Valid, 11017 SdHoareTripleChecker+Invalid, 1288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1286 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:24:41,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4075 Valid, 11017 Invalid, 1288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1286 Invalid, 1 Unknown, 0 Unchecked, 10.8s Time] [2022-11-19 07:24:41,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7581 states. [2022-11-19 07:24:41,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7581 to 7581. [2022-11-19 07:24:41,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7581 states, 4275 states have (on average 1.2371929824561403) internal successors, (5289), 4469 states have internal predecessors, (5289), 2691 states have call successors, (2691), 629 states have call predecessors, (2691), 612 states have return successors, (2833), 2622 states have call predecessors, (2833), 2685 states have call successors, (2833) [2022-11-19 07:24:42,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7581 states to 7581 states and 10813 transitions. [2022-11-19 07:24:42,054 INFO L78 Accepts]: Start accepts. Automaton has 7581 states and 10813 transitions. Word has length 116 [2022-11-19 07:24:42,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:24:42,054 INFO L495 AbstractCegarLoop]: Abstraction has 7581 states and 10813 transitions. [2022-11-19 07:24:42,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (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) [2022-11-19 07:24:42,055 INFO L276 IsEmpty]: Start isEmpty. Operand 7581 states and 10813 transitions. [2022-11-19 07:24:42,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-19 07:24:42,058 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:24:42,058 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:24:42,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-19 07:24:42,059 INFO L420 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)] === [2022-11-19 07:24:42,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:24:42,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1067793865, now seen corresponding path program 1 times [2022-11-19 07:24:42,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:24:42,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612550834] [2022-11-19 07:24:42,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:42,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:24:42,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:44,474 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2022-11-19 07:24:44,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:24:44,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612550834] [2022-11-19 07:24:44,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612550834] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:24:44,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:24:44,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:24:44,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200280656] [2022-11-19 07:24:44,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:24:44,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:24:44,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:24:44,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:24:44,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:24:44,477 INFO L87 Difference]: Start difference. First operand 7581 states and 10813 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-19 07:24:46,601 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:24:59,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:24:59,523 INFO L93 Difference]: Finished difference Result 7601 states and 10829 transitions. [2022-11-19 07:24:59,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:24:59,524 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 142 [2022-11-19 07:24:59,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:24:59,548 INFO L225 Difference]: With dead ends: 7601 [2022-11-19 07:24:59,548 INFO L226 Difference]: Without dead ends: 7599 [2022-11-19 07:24:59,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:24:59,554 INFO L413 NwaCegarLoop]: 4703 mSDtfsCounter, 3907 mSDsluCounter, 12613 mSDsCounter, 0 mSdLazyCounter, 1713 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3912 SdHoareTripleChecker+Valid, 17316 SdHoareTripleChecker+Invalid, 1717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1713 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:24:59,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3912 Valid, 17316 Invalid, 1717 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3 Valid, 1713 Invalid, 1 Unknown, 0 Unchecked, 13.9s Time] [2022-11-19 07:24:59,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7599 states. [2022-11-19 07:25:00,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7599 to 7589. [2022-11-19 07:25:00,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7589 states, 4281 states have (on average 1.2368605466012614) internal successors, (5295), 4475 states have internal predecessors, (5295), 2691 states have call successors, (2691), 631 states have call predecessors, (2691), 614 states have return successors, (2833), 2622 states have call predecessors, (2833), 2685 states have call successors, (2833) [2022-11-19 07:25:00,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7589 states to 7589 states and 10819 transitions. [2022-11-19 07:25:00,267 INFO L78 Accepts]: Start accepts. Automaton has 7589 states and 10819 transitions. Word has length 142 [2022-11-19 07:25:00,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:25:00,267 INFO L495 AbstractCegarLoop]: Abstraction has 7589 states and 10819 transitions. [2022-11-19 07:25:00,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-19 07:25:00,268 INFO L276 IsEmpty]: Start isEmpty. Operand 7589 states and 10819 transitions. [2022-11-19 07:25:00,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-19 07:25:00,270 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:25:00,270 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:25:00,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-19 07:25:00,270 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-19 07:25:00,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:25:00,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1231925, now seen corresponding path program 1 times [2022-11-19 07:25:00,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:25:00,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218507923] [2022-11-19 07:25:00,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:00,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:25:00,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:01,556 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-11-19 07:25:01,556 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:25:01,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218507923] [2022-11-19 07:25:01,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218507923] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:25:01,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:25:01,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:25:01,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127084189] [2022-11-19 07:25:01,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:25:01,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:25:01,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:25:01,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:25:01,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:25:01,558 INFO L87 Difference]: Start difference. First operand 7589 states and 10819 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (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) [2022-11-19 07:25:03,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:25:14,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:25:14,032 INFO L93 Difference]: Finished difference Result 7633 states and 10855 transitions. [2022-11-19 07:25:14,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:25:14,033 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (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 121 [2022-11-19 07:25:14,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:25:14,055 INFO L225 Difference]: With dead ends: 7633 [2022-11-19 07:25:14,055 INFO L226 Difference]: Without dead ends: 7629 [2022-11-19 07:25:14,059 INFO L412 NwaCegarLoop]: 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 [2022-11-19 07:25:14,059 INFO L413 NwaCegarLoop]: 3681 mSDtfsCounter, 4045 mSDsluCounter, 7366 mSDsCounter, 0 mSdLazyCounter, 1291 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4046 SdHoareTripleChecker+Valid, 11047 SdHoareTripleChecker+Invalid, 1294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1291 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:25:14,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4046 Valid, 11047 Invalid, 1294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1291 Invalid, 1 Unknown, 0 Unchecked, 11.4s Time] [2022-11-19 07:25:14,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7629 states. [2022-11-19 07:25:14,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7629 to 7627. [2022-11-19 07:25:14,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7627 states, 4308 states have (on average 1.2360724233983287) internal successors, (5325), 4501 states have internal predecessors, (5325), 2691 states have call successors, (2691), 643 states have call predecessors, (2691), 625 states have return successors, (2833), 2622 states have call predecessors, (2833), 2685 states have call successors, (2833) [2022-11-19 07:25:14,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7627 states to 7627 states and 10849 transitions. [2022-11-19 07:25:14,714 INFO L78 Accepts]: Start accepts. Automaton has 7627 states and 10849 transitions. Word has length 121 [2022-11-19 07:25:14,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:25:14,715 INFO L495 AbstractCegarLoop]: Abstraction has 7627 states and 10849 transitions. [2022-11-19 07:25:14,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (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) [2022-11-19 07:25:14,715 INFO L276 IsEmpty]: Start isEmpty. Operand 7627 states and 10849 transitions. [2022-11-19 07:25:14,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-19 07:25:14,719 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:25:14,719 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:25:14,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-19 07:25:14,720 INFO L420 AbstractCegarLoop]: === Iteration 21 === 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)] === [2022-11-19 07:25:14,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:25:14,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1344483044, now seen corresponding path program 1 times [2022-11-19 07:25:14,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:25:14,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197965457] [2022-11-19 07:25:14,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:14,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:25:14,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:15,844 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 623 trivial. 0 not checked. [2022-11-19 07:25:15,845 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:25:15,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197965457] [2022-11-19 07:25:15,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197965457] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:25:15,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:25:15,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:25:15,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728703476] [2022-11-19 07:25:15,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:25:15,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:25:15,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:25:15,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:25:15,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:25:15,847 INFO L87 Difference]: Start difference. First operand 7627 states and 10849 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-19 07:25:17,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:25:27,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:25:27,442 INFO L93 Difference]: Finished difference Result 7633 states and 10854 transitions. [2022-11-19 07:25:27,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:25:27,442 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 125 [2022-11-19 07:25:27,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:25:27,475 INFO L225 Difference]: With dead ends: 7633 [2022-11-19 07:25:27,475 INFO L226 Difference]: Without dead ends: 7429 [2022-11-19 07:25:27,480 INFO L412 NwaCegarLoop]: 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 [2022-11-19 07:25:27,481 INFO L413 NwaCegarLoop]: 3682 mSDtfsCounter, 4074 mSDsluCounter, 7338 mSDsCounter, 0 mSdLazyCounter, 1283 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4074 SdHoareTripleChecker+Valid, 11020 SdHoareTripleChecker+Invalid, 1285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1283 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:25:27,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4074 Valid, 11020 Invalid, 1285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1283 Invalid, 1 Unknown, 0 Unchecked, 10.5s Time] [2022-11-19 07:25:27,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7429 states. [2022-11-19 07:25:28,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7429 to 7429. [2022-11-19 07:25:28,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7429 states, 4192 states have (on average 1.2416507633587786) internal successors, (5205), 4383 states have internal predecessors, (5205), 2645 states have call successors, (2645), 606 states have call predecessors, (2645), 589 states have return successors, (2790), 2579 states have call predecessors, (2790), 2642 states have call successors, (2790) [2022-11-19 07:25:28,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7429 states to 7429 states and 10640 transitions. [2022-11-19 07:25:28,356 INFO L78 Accepts]: Start accepts. Automaton has 7429 states and 10640 transitions. Word has length 125 [2022-11-19 07:25:28,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:25:28,357 INFO L495 AbstractCegarLoop]: Abstraction has 7429 states and 10640 transitions. [2022-11-19 07:25:28,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-19 07:25:28,357 INFO L276 IsEmpty]: Start isEmpty. Operand 7429 states and 10640 transitions. [2022-11-19 07:25:28,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-11-19 07:25:28,361 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:25:28,361 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:25:28,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-19 07:25:28,361 INFO L420 AbstractCegarLoop]: === Iteration 22 === 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)] === [2022-11-19 07:25:28,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:25:28,362 INFO L85 PathProgramCache]: Analyzing trace with hash 154966357, now seen corresponding path program 1 times [2022-11-19 07:25:28,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:25:28,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390963808] [2022-11-19 07:25:28,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:28,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:25:28,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:29,174 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2022-11-19 07:25:29,175 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:25:29,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390963808] [2022-11-19 07:25:29,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390963808] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:25:29,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:25:29,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:25:29,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122315545] [2022-11-19 07:25:29,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:25:29,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:25:29,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:25:29,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:25:29,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:25:29,177 INFO L87 Difference]: Start difference. First operand 7429 states and 10640 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-19 07:25:31,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:25:41,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:25:41,611 INFO L93 Difference]: Finished difference Result 14852 states and 21281 transitions. [2022-11-19 07:25:41,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:25:41,615 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 150 [2022-11-19 07:25:41,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:25:41,652 INFO L225 Difference]: With dead ends: 14852 [2022-11-19 07:25:41,652 INFO L226 Difference]: Without dead ends: 7437 [2022-11-19 07:25:41,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:25:41,695 INFO L413 NwaCegarLoop]: 3635 mSDtfsCounter, 10 mSDsluCounter, 7252 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 10887 SdHoareTripleChecker+Invalid, 1278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:25:41,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 10887 Invalid, 1278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1275 Invalid, 1 Unknown, 0 Unchecked, 11.4s Time] [2022-11-19 07:25:41,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7437 states. [2022-11-19 07:25:42,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7437 to 7433. [2022-11-19 07:25:42,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7433 states, 4194 states have (on average 1.2415355269432522) internal successors, (5207), 4387 states have internal predecessors, (5207), 2645 states have call successors, (2645), 606 states have call predecessors, (2645), 591 states have return successors, (2792), 2579 states have call predecessors, (2792), 2642 states have call successors, (2792) [2022-11-19 07:25:42,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7433 states to 7433 states and 10644 transitions. [2022-11-19 07:25:42,697 INFO L78 Accepts]: Start accepts. Automaton has 7433 states and 10644 transitions. Word has length 150 [2022-11-19 07:25:42,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:25:42,697 INFO L495 AbstractCegarLoop]: Abstraction has 7433 states and 10644 transitions. [2022-11-19 07:25:42,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-19 07:25:42,698 INFO L276 IsEmpty]: Start isEmpty. Operand 7433 states and 10644 transitions. [2022-11-19 07:25:42,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-11-19 07:25:42,701 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:25:42,701 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:25:42,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-19 07:25:42,702 INFO L420 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)] === [2022-11-19 07:25:42,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:25:42,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1698125295, now seen corresponding path program 1 times [2022-11-19 07:25:42,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:25:42,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399975005] [2022-11-19 07:25:42,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:42,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:25:43,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:43,642 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-11-19 07:25:43,642 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:25:43,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399975005] [2022-11-19 07:25:43,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399975005] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:25:43,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:25:43,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:25:43,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044518556] [2022-11-19 07:25:43,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:25:43,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:25:43,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:25:43,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:25:43,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:25:43,644 INFO L87 Difference]: Start difference. First operand 7433 states and 10644 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-19 07:25:45,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:25:52,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:25:52,891 INFO L93 Difference]: Finished difference Result 14717 states and 21243 transitions. [2022-11-19 07:25:52,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:25:52,892 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 151 [2022-11-19 07:25:52,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:25:52,919 INFO L225 Difference]: With dead ends: 14717 [2022-11-19 07:25:52,919 INFO L226 Difference]: Without dead ends: 7298 [2022-11-19 07:25:52,944 INFO L412 NwaCegarLoop]: 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 [2022-11-19 07:25:52,945 INFO L413 NwaCegarLoop]: 3638 mSDtfsCounter, 1 mSDsluCounter, 3635 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 7273 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:25:52,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 7273 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 845 Invalid, 1 Unknown, 0 Unchecked, 8.2s Time] [2022-11-19 07:25:52,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7298 states. [2022-11-19 07:25:53,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7298 to 7296. [2022-11-19 07:25:53,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7296 states, 4120 states have (on average 1.2402912621359223) internal successors, (5110), 4308 states have internal predecessors, (5110), 2587 states have call successors, (2587), 601 states have call predecessors, (2587), 586 states have return successors, (2718), 2522 states have call predecessors, (2718), 2584 states have call successors, (2718) [2022-11-19 07:25:53,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7296 states to 7296 states and 10415 transitions. [2022-11-19 07:25:53,884 INFO L78 Accepts]: Start accepts. Automaton has 7296 states and 10415 transitions. Word has length 151 [2022-11-19 07:25:53,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:25:53,884 INFO L495 AbstractCegarLoop]: Abstraction has 7296 states and 10415 transitions. [2022-11-19 07:25:53,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-19 07:25:53,885 INFO L276 IsEmpty]: Start isEmpty. Operand 7296 states and 10415 transitions. [2022-11-19 07:25:53,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-11-19 07:25:53,887 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:25:53,888 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:25:53,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-19 07:25:53,888 INFO L420 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)] === [2022-11-19 07:25:53,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:25:53,889 INFO L85 PathProgramCache]: Analyzing trace with hash 853646493, now seen corresponding path program 1 times [2022-11-19 07:25:53,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:25:53,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225985718] [2022-11-19 07:25:53,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:53,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:25:54,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:54,602 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2022-11-19 07:25:54,602 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:25:54,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225985718] [2022-11-19 07:25:54,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225985718] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:25:54,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:25:54,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:25:54,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136175449] [2022-11-19 07:25:54,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:25:54,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:25:54,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:25:54,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:25:54,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:25:54,605 INFO L87 Difference]: Start difference. First operand 7296 states and 10415 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, (28), 2 states have call predecessors, (28), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-19 07:25:56,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:26:04,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:26:04,324 INFO L93 Difference]: Finished difference Result 14856 states and 21266 transitions. [2022-11-19 07:26:04,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:26:04,324 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, (28), 2 states have call predecessors, (28), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 153 [2022-11-19 07:26:04,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:26:04,356 INFO L225 Difference]: With dead ends: 14856 [2022-11-19 07:26:04,356 INFO L226 Difference]: Without dead ends: 7574 [2022-11-19 07:26:04,381 INFO L412 NwaCegarLoop]: 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 [2022-11-19 07:26:04,381 INFO L413 NwaCegarLoop]: 3695 mSDtfsCounter, 242 mSDsluCounter, 3483 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 7178 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:26:04,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 7178 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 829 Invalid, 1 Unknown, 0 Unchecked, 8.6s Time] [2022-11-19 07:26:04,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7574 states. [2022-11-19 07:26:05,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7574 to 7304. [2022-11-19 07:26:05,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7304 states, 4126 states have (on average 1.240426563257392) internal successors, (5118), 4315 states have internal predecessors, (5118), 2588 states have call successors, (2588), 601 states have call predecessors, (2588), 587 states have return successors, (2721), 2523 states have call predecessors, (2721), 2585 states have call successors, (2721) [2022-11-19 07:26:05,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 10427 transitions. [2022-11-19 07:26:05,427 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 10427 transitions. Word has length 153 [2022-11-19 07:26:05,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:26:05,428 INFO L495 AbstractCegarLoop]: Abstraction has 7304 states and 10427 transitions. [2022-11-19 07:26:05,428 INFO L496 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, (28), 2 states have call predecessors, (28), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-19 07:26:05,429 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 10427 transitions. [2022-11-19 07:26:05,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-11-19 07:26:05,431 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:26:05,432 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:26:05,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-19 07:26:05,432 INFO L420 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)] === [2022-11-19 07:26:05,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:26:05,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1009994102, now seen corresponding path program 1 times [2022-11-19 07:26:05,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:26:05,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908173155] [2022-11-19 07:26:05,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:05,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:26:05,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:06,388 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2022-11-19 07:26:06,389 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:26:06,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908173155] [2022-11-19 07:26:06,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908173155] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:26:06,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:26:06,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:26:06,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090515658] [2022-11-19 07:26:06,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:26:06,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:26:06,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:26:06,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:26:06,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:26:06,391 INFO L87 Difference]: Start difference. First operand 7304 states and 10427 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (23), 1 states have call predecessors, (23), 1 states have call successors, (23) [2022-11-19 07:26:08,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:26:15,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:26:15,676 INFO L93 Difference]: Finished difference Result 14653 states and 20958 transitions. [2022-11-19 07:26:15,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:26:15,677 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (23), 1 states have call predecessors, (23), 1 states have call successors, (23) Word has length 154 [2022-11-19 07:26:15,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:26:15,714 INFO L225 Difference]: With dead ends: 14653 [2022-11-19 07:26:15,714 INFO L226 Difference]: Without dead ends: 7363 [2022-11-19 07:26:15,744 INFO L412 NwaCegarLoop]: 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 [2022-11-19 07:26:15,744 INFO L413 NwaCegarLoop]: 3663 mSDtfsCounter, 26 mSDsluCounter, 3642 mSDsCounter, 0 mSdLazyCounter, 850 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 7305 SdHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 850 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:26:15,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 7305 Invalid, 851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 850 Invalid, 1 Unknown, 0 Unchecked, 8.3s Time] [2022-11-19 07:26:15,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7363 states. [2022-11-19 07:26:16,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7363 to 7306. [2022-11-19 07:26:16,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7306 states, 4128 states have (on average 1.2403100775193798) internal successors, (5120), 4317 states have internal predecessors, (5120), 2588 states have call successors, (2588), 601 states have call predecessors, (2588), 587 states have return successors, (2721), 2523 states have call predecessors, (2721), 2585 states have call successors, (2721) [2022-11-19 07:26:16,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7306 states to 7306 states and 10429 transitions. [2022-11-19 07:26:16,784 INFO L78 Accepts]: Start accepts. Automaton has 7306 states and 10429 transitions. Word has length 154 [2022-11-19 07:26:16,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:26:16,784 INFO L495 AbstractCegarLoop]: Abstraction has 7306 states and 10429 transitions. [2022-11-19 07:26:16,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (23), 1 states have call predecessors, (23), 1 states have call successors, (23) [2022-11-19 07:26:16,784 INFO L276 IsEmpty]: Start isEmpty. Operand 7306 states and 10429 transitions. [2022-11-19 07:26:16,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-19 07:26:16,787 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:26:16,787 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:26:16,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-19 07:26:16,788 INFO L420 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)] === [2022-11-19 07:26:16,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:26:16,788 INFO L85 PathProgramCache]: Analyzing trace with hash -163375136, now seen corresponding path program 1 times [2022-11-19 07:26:16,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:26:16,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388903391] [2022-11-19 07:26:16,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:16,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:26:17,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:18,671 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2022-11-19 07:26:18,671 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:26:18,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388903391] [2022-11-19 07:26:18,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388903391] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:26:18,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:26:18,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:26:18,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582140927] [2022-11-19 07:26:18,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:26:18,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:26:18,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:26:18,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:26:18,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:26:18,674 INFO L87 Difference]: Start difference. First operand 7306 states and 10429 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-19 07:26:20,769 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:26:30,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:26:30,996 INFO L93 Difference]: Finished difference Result 7326 states and 10447 transitions. [2022-11-19 07:26:30,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:26:30,997 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 155 [2022-11-19 07:26:30,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:26:31,033 INFO L225 Difference]: With dead ends: 7326 [2022-11-19 07:26:31,033 INFO L226 Difference]: Without dead ends: 7324 [2022-11-19 07:26:31,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:26:31,039 INFO L413 NwaCegarLoop]: 3639 mSDtfsCounter, 3973 mSDsluCounter, 7296 mSDsCounter, 0 mSdLazyCounter, 1277 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3978 SdHoareTripleChecker+Valid, 10935 SdHoareTripleChecker+Invalid, 1280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1277 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:26:31,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3978 Valid, 10935 Invalid, 1280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1277 Invalid, 1 Unknown, 0 Unchecked, 11.2s Time] [2022-11-19 07:26:31,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7324 states. [2022-11-19 07:26:31,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7324 to 7322. [2022-11-19 07:26:31,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7322 states, 4140 states have (on average 1.2396135265700483) internal successors, (5132), 4329 states have internal predecessors, (5132), 2588 states have call successors, (2588), 605 states have call predecessors, (2588), 591 states have return successors, (2721), 2523 states have call predecessors, (2721), 2585 states have call successors, (2721) [2022-11-19 07:26:31,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7322 states to 7322 states and 10441 transitions. [2022-11-19 07:26:31,939 INFO L78 Accepts]: Start accepts. Automaton has 7322 states and 10441 transitions. Word has length 155 [2022-11-19 07:26:31,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:26:31,940 INFO L495 AbstractCegarLoop]: Abstraction has 7322 states and 10441 transitions. [2022-11-19 07:26:31,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-19 07:26:31,940 INFO L276 IsEmpty]: Start isEmpty. Operand 7322 states and 10441 transitions. [2022-11-19 07:26:31,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-11-19 07:26:31,943 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:26:31,943 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:26:31,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-19 07:26:31,944 INFO L420 AbstractCegarLoop]: === Iteration 27 === 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)] === [2022-11-19 07:26:31,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:26:31,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1414456033, now seen corresponding path program 1 times [2022-11-19 07:26:31,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:26:31,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997065224] [2022-11-19 07:26:31,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:31,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:26:32,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:33,014 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2022-11-19 07:26:33,015 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:26:33,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997065224] [2022-11-19 07:26:33,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997065224] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:26:33,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112592829] [2022-11-19 07:26:33,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:33,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:26:33,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66c42b89-06b0-40f0-85db-9329d2389434/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:26:33,017 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66c42b89-06b0-40f0-85db-9329d2389434/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:26:33,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66c42b89-06b0-40f0-85db-9329d2389434/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:26:37,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:37,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 5735 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:26:37,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:37,943 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2022-11-19 07:26:37,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:26:38,212 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2022-11-19 07:26:38,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112592829] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:26:38,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1429540691] [2022-11-19 07:26:38,236 INFO L159 IcfgInterpreter]: Started Sifa with 104 locations of interest [2022-11-19 07:26:38,236 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:26:38,240 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:26:38,246 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:26:38,246 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs