./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 aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0147f0a-b748-46cf-8a2e-c07184fa343b/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0147f0a-b748-46cf-8a2e-c07184fa343b/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0147f0a-b748-46cf-8a2e-c07184fa343b/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0147f0a-b748-46cf-8a2e-c07184fa343b/bin/utaipan-EQgc7hIp5V/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_b0147f0a-b748-46cf-8a2e-c07184fa343b/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0147f0a-b748-46cf-8a2e-c07184fa343b/bin/utaipan-EQgc7hIp5V --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 --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:46:08,590 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:46:08,592 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:46:08,651 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:46:08,651 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:46:08,653 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:46:08,655 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:46:08,658 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:46:08,660 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:46:08,662 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:46:08,663 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:46:08,670 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:46:08,671 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:46:08,677 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:46:08,680 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:46:08,683 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:46:08,685 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:46:08,687 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:46:08,691 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:46:08,700 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:46:08,702 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:46:08,703 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:46:08,706 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:46:08,708 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:46:08,720 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:46:08,721 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:46:08,721 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:46:08,723 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:46:08,724 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:46:08,726 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:46:08,726 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:46:08,727 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:46:08,729 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:46:08,731 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:46:08,732 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:46:08,732 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:46:08,733 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:46:08,734 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:46:08,734 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:46:08,735 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:46:08,736 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:46:08,737 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0147f0a-b748-46cf-8a2e-c07184fa343b/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 02:46:08,784 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:46:08,785 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:46:08,786 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:46:08,786 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:46:08,793 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:46:08,793 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:46:08,794 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:46:08,794 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:46:08,794 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:46:08,794 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:46:08,795 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:46:08,796 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:46:08,796 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:46:08,796 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:46:08,796 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:46:08,797 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:46:08,797 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:46:08,797 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:46:08,798 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:46:08,799 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:46:08,799 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:46:08,799 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:46:08,799 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:46:08,799 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:46:08,800 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:46:08,800 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:46:08,801 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:46:08,802 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:46:08,802 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:46:08,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:46:08,802 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:46:08,803 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:46:08,803 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:46:08,803 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:46:08,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:46:08,804 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:46:08,804 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:46:08,804 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:46:08,804 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0147f0a-b748-46cf-8a2e-c07184fa343b/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0147f0a-b748-46cf-8a2e-c07184fa343b/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 463dbca1530ea0e57c159e9405d50f794488f63283b3e27908f44b92b1921358 [2021-11-23 02:46:09,148 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:46:09,169 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:46:09,172 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:46:09,173 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:46:09,174 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:46:09,175 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0147f0a-b748-46cf-8a2e-c07184fa343b/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-sun-cassini.cil.i [2021-11-23 02:46:09,239 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0147f0a-b748-46cf-8a2e-c07184fa343b/bin/utaipan-EQgc7hIp5V/data/963477d80/7560aa1c732f4b2e8da6506f61ccf83f/FLAGe01b71c64 [2021-11-23 02:46:10,326 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:46:10,326 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0147f0a-b748-46cf-8a2e-c07184fa343b/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-sun-cassini.cil.i [2021-11-23 02:46:10,412 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0147f0a-b748-46cf-8a2e-c07184fa343b/bin/utaipan-EQgc7hIp5V/data/963477d80/7560aa1c732f4b2e8da6506f61ccf83f/FLAGe01b71c64 [2021-11-23 02:46:10,616 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0147f0a-b748-46cf-8a2e-c07184fa343b/bin/utaipan-EQgc7hIp5V/data/963477d80/7560aa1c732f4b2e8da6506f61ccf83f [2021-11-23 02:46:10,617 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:46:10,619 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:46:10,620 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:46:10,621 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:46:10,624 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:46:10,625 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:46:10" (1/1) ... [2021-11-23 02:46:10,627 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2433159d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:10, skipping insertion in model container [2021-11-23 02:46:10,627 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:46:10" (1/1) ... [2021-11-23 02:46:10,634 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:46:10,855 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:46:16,478 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0147f0a-b748-46cf-8a2e-c07184fa343b/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-sun-cassini.cil.i[487146,487159] [2021-11-23 02:46:16,481 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0147f0a-b748-46cf-8a2e-c07184fa343b/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-sun-cassini.cil.i[487315,487328] [2021-11-23 02:46:16,482 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0147f0a-b748-46cf-8a2e-c07184fa343b/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-sun-cassini.cil.i[487482,487495] [2021-11-23 02:46:16,490 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0147f0a-b748-46cf-8a2e-c07184fa343b/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-sun-cassini.cil.i[487650,487663] [2021-11-23 02:46:16,521 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:46:16,582 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:46:17,176 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0147f0a-b748-46cf-8a2e-c07184fa343b/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-sun-cassini.cil.i[487146,487159] [2021-11-23 02:46:17,177 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0147f0a-b748-46cf-8a2e-c07184fa343b/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-sun-cassini.cil.i[487315,487328] [2021-11-23 02:46:17,177 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0147f0a-b748-46cf-8a2e-c07184fa343b/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-sun-cassini.cil.i[487482,487495] [2021-11-23 02:46:17,177 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0147f0a-b748-46cf-8a2e-c07184fa343b/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-sun-cassini.cil.i[487650,487663] [2021-11-23 02:46:17,190 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:46:17,600 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:46:17,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:17 WrapperNode [2021-11-23 02:46:17,601 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:46:17,603 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:46:17,603 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:46:17,603 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:46:17,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:17" (1/1) ... [2021-11-23 02:46:17,798 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:17" (1/1) ... [2021-11-23 02:46:18,219 INFO L137 Inliner]: procedures = 676, calls = 4210, calls flagged for inlining = 325, calls inlined = 302, statements flattened = 10119 [2021-11-23 02:46:18,220 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:46:18,221 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:46:18,221 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:46:18,221 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:46:18,231 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:17" (1/1) ... [2021-11-23 02:46:18,232 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:17" (1/1) ... [2021-11-23 02:46:18,287 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:17" (1/1) ... [2021-11-23 02:46:18,287 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:17" (1/1) ... [2021-11-23 02:46:18,554 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:17" (1/1) ... [2021-11-23 02:46:18,604 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:17" (1/1) ... [2021-11-23 02:46:18,650 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:17" (1/1) ... [2021-11-23 02:46:18,715 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:46:18,716 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:46:18,716 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:46:18,716 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:46:18,717 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:17" (1/1) ... [2021-11-23 02:46:18,725 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:46:18,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0147f0a-b748-46cf-8a2e-c07184fa343b/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:46:18,757 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0147f0a-b748-46cf-8a2e-c07184fa343b/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:46:18,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0147f0a-b748-46cf-8a2e-c07184fa343b/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:46:18,812 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2021-11-23 02:46:18,813 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2021-11-23 02:46:18,813 INFO L130 BoogieDeclarations]: Found specification of procedure cas_phy_read [2021-11-23 02:46:18,813 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_phy_read [2021-11-23 02:46:18,813 INFO L130 BoogieDeclarations]: Found specification of procedure cas_pcs_link_check [2021-11-23 02:46:18,813 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_pcs_link_check [2021-11-23 02:46:18,814 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mod_timer_121 [2021-11-23 02:46:18,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mod_timer_121 [2021-11-23 02:46:18,814 INFO L130 BoogieDeclarations]: Found specification of procedure pci_release_regions [2021-11-23 02:46:18,814 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_release_regions [2021-11-23 02:46:18,814 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-23 02:46:18,815 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-23 02:46:18,815 INFO L130 BoogieDeclarations]: Found specification of procedure lowmem_page_address [2021-11-23 02:46:18,815 INFO L138 BoogieDeclarations]: Found implementation of procedure lowmem_page_address [2021-11-23 02:46:18,815 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unmap_page [2021-11-23 02:46:18,815 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unmap_page [2021-11-23 02:46:18,815 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-23 02:46:18,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-23 02:46:18,816 INFO L130 BoogieDeclarations]: Found specification of procedure cas_mii_link_check [2021-11-23 02:46:18,816 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_mii_link_check [2021-11-23 02:46:18,816 INFO L130 BoogieDeclarations]: Found specification of procedure cas_calc_tabort [2021-11-23 02:46:18,816 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_calc_tabort [2021-11-23 02:46:18,816 INFO L130 BoogieDeclarations]: Found specification of procedure pci_read_config_word [2021-11-23 02:46:18,816 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_read_config_word [2021-11-23 02:46:18,817 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_timer_timer_instance_3 [2021-11-23 02:46:18,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_timer_timer_instance_3 [2021-11-23 02:46:18,817 INFO L130 BoogieDeclarations]: Found specification of procedure pci_dma_sync_single_for_cpu [2021-11-23 02:46:18,818 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_dma_sync_single_for_cpu [2021-11-23 02:46:18,818 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-23 02:46:18,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-23 02:46:18,818 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mod_timer_147 [2021-11-23 02:46:18,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mod_timer_147 [2021-11-23 02:46:18,819 INFO L130 BoogieDeclarations]: Found specification of procedure dma_map_page [2021-11-23 02:46:18,819 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_map_page [2021-11-23 02:46:18,819 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2021-11-23 02:46:18,819 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2021-11-23 02:46:18,819 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_on [2021-11-23 02:46:18,819 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_on [2021-11-23 02:46:18,820 INFO L130 BoogieDeclarations]: Found specification of procedure cas_lock_tx [2021-11-23 02:46:18,820 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_lock_tx [2021-11-23 02:46:18,820 INFO L130 BoogieDeclarations]: Found specification of procedure pci_name [2021-11-23 02:46:18,821 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_name [2021-11-23 02:46:18,821 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-23 02:46:18,822 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-23 02:46:18,823 INFO L130 BoogieDeclarations]: Found specification of procedure cas_disable_irq [2021-11-23 02:46:18,823 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_disable_irq [2021-11-23 02:46:18,823 INFO L130 BoogieDeclarations]: Found specification of procedure cas_free_rxds [2021-11-23 02:46:18,823 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_free_rxds [2021-11-23 02:46:18,823 INFO L130 BoogieDeclarations]: Found specification of procedure pci_map_page [2021-11-23 02:46:18,824 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_map_page [2021-11-23 02:46:18,824 INFO L130 BoogieDeclarations]: Found specification of procedure cas_open [2021-11-23 02:46:18,824 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_open [2021-11-23 02:46:18,825 INFO L130 BoogieDeclarations]: Found specification of procedure cas_interrupt [2021-11-23 02:46:18,825 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_interrupt [2021-11-23 02:46:18,826 INFO L130 BoogieDeclarations]: Found specification of procedure cas_tx_tiny_free [2021-11-23 02:46:18,826 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_tx_tiny_free [2021-11-23 02:46:18,826 INFO L130 BoogieDeclarations]: Found specification of procedure PageTail [2021-11-23 02:46:18,826 INFO L138 BoogieDeclarations]: Found implementation of procedure PageTail [2021-11-23 02:46:18,826 INFO L130 BoogieDeclarations]: Found specification of procedure tx_tiny_map [2021-11-23 02:46:18,826 INFO L138 BoogieDeclarations]: Found implementation of procedure tx_tiny_map [2021-11-23 02:46:18,827 INFO L130 BoogieDeclarations]: Found specification of procedure cas_phy_init [2021-11-23 02:46:18,827 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_phy_init [2021-11-23 02:46:18,827 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_pages [2021-11-23 02:46:18,827 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_pages [2021-11-23 02:46:18,827 INFO L130 BoogieDeclarations]: Found specification of procedure skb_frag_size_set [2021-11-23 02:46:18,827 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_frag_size_set [2021-11-23 02:46:18,828 INFO L130 BoogieDeclarations]: Found specification of procedure pci_get_drvdata [2021-11-23 02:46:18,828 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_get_drvdata [2021-11-23 02:46:18,828 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-23 02:46:18,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-23 02:46:18,828 INFO L130 BoogieDeclarations]: Found specification of procedure cas_enable_irq [2021-11-23 02:46:18,829 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_enable_irq [2021-11-23 02:46:18,829 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-11-23 02:46:18,830 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-11-23 02:46:18,830 INFO L130 BoogieDeclarations]: Found specification of procedure skb_end_pointer [2021-11-23 02:46:18,830 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_end_pointer [2021-11-23 02:46:18,830 INFO L130 BoogieDeclarations]: Found specification of procedure cas_page_dequeue [2021-11-23 02:46:18,831 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_page_dequeue [2021-11-23 02:46:18,831 INFO L130 BoogieDeclarations]: Found specification of procedure netif_rx [2021-11-23 02:46:18,831 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_rx [2021-11-23 02:46:18,832 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-23 02:46:18,832 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-23 02:46:18,832 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-23 02:46:18,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-23 02:46:18,833 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-23 02:46:18,833 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-23 02:46:18,833 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_attach [2021-11-23 02:46:18,834 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_attach [2021-11-23 02:46:18,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:46:18,835 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_108 [2021-11-23 02:46:18,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_108 [2021-11-23 02:46:18,835 INFO L130 BoogieDeclarations]: Found specification of procedure pci_write_config_word [2021-11-23 02:46:18,836 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_write_config_word [2021-11-23 02:46:18,836 INFO L130 BoogieDeclarations]: Found specification of procedure cas_set_multicast [2021-11-23 02:46:18,836 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_set_multicast [2021-11-23 02:46:18,836 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2021-11-23 02:46:18,836 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2021-11-23 02:46:18,836 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_detach [2021-11-23 02:46:18,837 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_detach [2021-11-23 02:46:18,837 INFO L130 BoogieDeclarations]: Found specification of procedure cas_spare_free [2021-11-23 02:46:18,837 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_spare_free [2021-11-23 02:46:18,837 INFO L130 BoogieDeclarations]: Found specification of procedure cas_tx_timeout [2021-11-23 02:46:18,838 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_tx_timeout [2021-11-23 02:46:18,838 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-23 02:46:18,839 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-23 02:46:18,839 INFO L130 BoogieDeclarations]: Found specification of procedure cas_read_pcs_link_mode [2021-11-23 02:46:18,842 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_read_pcs_link_mode [2021-11-23 02:46:18,843 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-11-23 02:46:18,843 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-11-23 02:46:18,843 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-23 02:46:18,843 INFO L130 BoogieDeclarations]: Found specification of procedure cas_close [2021-11-23 02:46:18,844 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_close [2021-11-23 02:46:18,845 INFO L130 BoogieDeclarations]: Found specification of procedure cas_page_swap [2021-11-23 02:46:18,845 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_page_swap [2021-11-23 02:46:18,845 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-23 02:46:18,851 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-23 02:46:18,851 INFO L130 BoogieDeclarations]: Found specification of procedure cas_netpoll [2021-11-23 02:46:18,852 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_netpoll [2021-11-23 02:46:18,852 INFO L130 BoogieDeclarations]: Found specification of procedure cas_hard_reset [2021-11-23 02:46:18,852 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_hard_reset [2021-11-23 02:46:18,852 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-23 02:46:18,852 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-23 02:46:18,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-23 02:46:18,853 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-23 02:46:18,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-23 02:46:18,853 INFO L130 BoogieDeclarations]: Found specification of procedure cas_rxc_init [2021-11-23 02:46:18,853 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_rxc_init [2021-11-23 02:46:18,853 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:46:18,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-23 02:46:18,854 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-23 02:46:18,854 INFO L130 BoogieDeclarations]: Found specification of procedure cas_clear_mac_err [2021-11-23 02:46:18,854 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_clear_mac_err [2021-11-23 02:46:18,854 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_interrupt_context [2021-11-23 02:46:18,854 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_interrupt_context [2021-11-23 02:46:18,854 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2021-11-23 02:46:18,854 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2021-11-23 02:46:18,855 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_err_code [2021-11-23 02:46:18,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_err_code [2021-11-23 02:46:18,855 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_dma_mask [2021-11-23 02:46:18,855 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_dma_mask [2021-11-23 02:46:18,855 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_timer_instance_callback_3_2 [2021-11-23 02:46:18,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_timer_instance_callback_3_2 [2021-11-23 02:46:18,856 INFO L130 BoogieDeclarations]: Found specification of procedure cas_remove_one [2021-11-23 02:46:18,856 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_remove_one [2021-11-23 02:46:18,856 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_NOT_ARG_SIGN [2021-11-23 02:46:18,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_NOT_ARG_SIGN [2021-11-23 02:46:18,856 INFO L130 BoogieDeclarations]: Found specification of procedure pci_free_consistent [2021-11-23 02:46:18,856 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_free_consistent [2021-11-23 02:46:18,856 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2021-11-23 02:46:18,857 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2021-11-23 02:46:18,857 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-23 02:46:18,857 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-23 02:46:18,857 INFO L130 BoogieDeclarations]: Found specification of procedure __skb_dequeue [2021-11-23 02:46:18,857 INFO L138 BoogieDeclarations]: Found implementation of procedure __skb_dequeue [2021-11-23 02:46:18,857 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:46:18,858 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mod_timer [2021-11-23 02:46:18,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mod_timer [2021-11-23 02:46:18,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:46:18,858 INFO L130 BoogieDeclarations]: Found specification of procedure list_splice_init [2021-11-23 02:46:18,858 INFO L138 BoogieDeclarations]: Found implementation of procedure list_splice_init [2021-11-23 02:46:18,858 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-23 02:46:18,859 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-23 02:46:18,859 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-23 02:46:18,859 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-23 02:46:18,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:46:18,859 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-23 02:46:18,859 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-23 02:46:18,859 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-23 02:46:18,860 INFO L130 BoogieDeclarations]: Found specification of procedure cas_set_link_modes [2021-11-23 02:46:18,860 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_set_link_modes [2021-11-23 02:46:18,860 INFO L130 BoogieDeclarations]: Found specification of procedure cas_link_timer [2021-11-23 02:46:18,860 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_link_timer [2021-11-23 02:46:18,860 INFO L130 BoogieDeclarations]: Found specification of procedure cas_read_mii_link_mode [2021-11-23 02:46:18,860 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_read_mii_link_mode [2021-11-23 02:46:18,861 INFO L130 BoogieDeclarations]: Found specification of procedure __list_splice [2021-11-23 02:46:18,861 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_splice [2021-11-23 02:46:18,861 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2021-11-23 02:46:18,861 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2021-11-23 02:46:18,861 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~TO~VOID [2021-11-23 02:46:18,863 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~TO~VOID [2021-11-23 02:46:18,863 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2021-11-23 02:46:18,863 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2021-11-23 02:46:18,863 INFO L130 BoogieDeclarations]: Found specification of procedure kmap_atomic [2021-11-23 02:46:18,864 INFO L138 BoogieDeclarations]: Found implementation of procedure kmap_atomic [2021-11-23 02:46:18,864 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_spin_lock [2021-11-23 02:46:18,864 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_spin_lock [2021-11-23 02:46:18,864 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-23 02:46:18,864 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-23 02:46:18,864 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2021-11-23 02:46:18,864 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2021-11-23 02:46:18,865 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2021-11-23 02:46:18,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2021-11-23 02:46:18,865 INFO L130 BoogieDeclarations]: Found specification of procedure csum_unfold [2021-11-23 02:46:18,865 INFO L138 BoogieDeclarations]: Found implementation of procedure csum_unfold [2021-11-23 02:46:18,865 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~TO~VOID [2021-11-23 02:46:18,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~TO~VOID [2021-11-23 02:46:18,865 INFO L130 BoogieDeclarations]: Found specification of procedure writel [2021-11-23 02:46:18,866 INFO L138 BoogieDeclarations]: Found implementation of procedure writel [2021-11-23 02:46:18,866 INFO L130 BoogieDeclarations]: Found specification of procedure cas_entropy_gather [2021-11-23 02:46:18,866 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_entropy_gather [2021-11-23 02:46:18,866 INFO L130 BoogieDeclarations]: Found specification of procedure cas_resume [2021-11-23 02:46:18,866 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_resume [2021-11-23 02:46:18,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:46:18,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:46:18,867 INFO L130 BoogieDeclarations]: Found specification of procedure cas_page_alloc [2021-11-23 02:46:18,867 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_page_alloc [2021-11-23 02:46:18,867 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-23 02:46:18,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-23 02:46:18,867 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-23 02:46:18,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-23 02:46:18,868 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-23 02:46:18,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-23 02:46:18,868 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_off [2021-11-23 02:46:18,868 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_off [2021-11-23 02:46:18,868 INFO L130 BoogieDeclarations]: Found specification of procedure cas_mif_poll [2021-11-23 02:46:18,868 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_mif_poll [2021-11-23 02:46:18,868 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_process_context [2021-11-23 02:46:18,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_process_context [2021-11-23 02:46:18,869 INFO L130 BoogieDeclarations]: Found specification of procedure cas_unlock_tx [2021-11-23 02:46:18,869 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_unlock_tx [2021-11-23 02:46:18,869 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-23 02:46:18,869 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-23 02:46:18,869 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_133 [2021-11-23 02:46:18,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_133 [2021-11-23 02:46:18,870 INFO L130 BoogieDeclarations]: Found specification of procedure list_splice [2021-11-23 02:46:18,870 INFO L138 BoogieDeclarations]: Found implementation of procedure list_splice [2021-11-23 02:46:18,870 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_135 [2021-11-23 02:46:18,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_135 [2021-11-23 02:46:18,870 INFO L130 BoogieDeclarations]: Found specification of procedure ethtool_cmd_speed_set [2021-11-23 02:46:18,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ethtool_cmd_speed_set [2021-11-23 02:46:18,870 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_sub [2021-11-23 02:46:18,871 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_sub [2021-11-23 02:46:18,872 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_read [2021-11-23 02:46:18,876 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_read [2021-11-23 02:46:18,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-23 02:46:18,876 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-23 02:46:18,876 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-23 02:46:18,876 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-23 02:46:18,877 INFO L130 BoogieDeclarations]: Found specification of procedure pci_alloc_consistent [2021-11-23 02:46:18,877 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_alloc_consistent [2021-11-23 02:46:18,877 INFO L130 BoogieDeclarations]: Found specification of procedure tx_tiny_buf [2021-11-23 02:46:18,877 INFO L138 BoogieDeclarations]: Found implementation of procedure tx_tiny_buf [2021-11-23 02:46:18,879 INFO L130 BoogieDeclarations]: Found specification of procedure cas_mac_reset [2021-11-23 02:46:18,879 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_mac_reset [2021-11-23 02:46:18,879 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_lock_of_cas [2021-11-23 02:46:18,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_lock_of_cas [2021-11-23 02:46:18,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:46:18,880 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-11-23 02:46:18,880 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-11-23 02:46:18,880 INFO L130 BoogieDeclarations]: Found specification of procedure __skb_frag_set_page [2021-11-23 02:46:18,880 INFO L138 BoogieDeclarations]: Found implementation of procedure __skb_frag_set_page [2021-11-23 02:46:18,880 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:46:18,880 INFO L130 BoogieDeclarations]: Found specification of procedure cas_get_regs_len [2021-11-23 02:46:18,880 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_get_regs_len [2021-11-23 02:46:18,881 INFO L130 BoogieDeclarations]: Found specification of procedure cas_reset [2021-11-23 02:46:18,881 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_reset [2021-11-23 02:46:18,881 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dispatch_instance_register_8_2 [2021-11-23 02:46:18,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dispatch_instance_register_8_2 [2021-11-23 02:46:18,881 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_NOT_ARG_SIGN [2021-11-23 02:46:18,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_NOT_ARG_SIGN [2021-11-23 02:46:18,881 INFO L130 BoogieDeclarations]: Found specification of procedure __free_pages [2021-11-23 02:46:18,882 INFO L138 BoogieDeclarations]: Found implementation of procedure __free_pages [2021-11-23 02:46:18,882 INFO L130 BoogieDeclarations]: Found specification of procedure cas_post_page [2021-11-23 02:46:18,882 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_post_page [2021-11-23 02:46:18,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 02:46:18,882 INFO L130 BoogieDeclarations]: Found specification of procedure pci_write_config_byte [2021-11-23 02:46:18,882 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_write_config_byte [2021-11-23 02:46:18,882 INFO L130 BoogieDeclarations]: Found specification of procedure cas_nway_reset [2021-11-23 02:46:18,883 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_nway_reset [2021-11-23 02:46:18,883 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-11-23 02:46:18,883 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-11-23 02:46:18,883 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-23 02:46:18,883 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-23 02:46:18,883 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-23 02:46:18,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-23 02:46:18,884 INFO L130 BoogieDeclarations]: Found specification of procedure cas_setup_multicast [2021-11-23 02:46:18,884 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_setup_multicast [2021-11-23 02:46:18,884 INFO L130 BoogieDeclarations]: Found specification of procedure cas_phy_powerdown [2021-11-23 02:46:18,884 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_phy_powerdown [2021-11-23 02:46:18,884 INFO L130 BoogieDeclarations]: Found specification of procedure cas_post_rxds_ringN [2021-11-23 02:46:18,884 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_post_rxds_ringN [2021-11-23 02:46:18,885 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_irq [2021-11-23 02:46:18,885 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_irq [2021-11-23 02:46:18,885 INFO L130 BoogieDeclarations]: Found specification of procedure cas_vpd_match [2021-11-23 02:46:18,885 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_vpd_match [2021-11-23 02:46:18,885 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_83 [2021-11-23 02:46:18,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_83 [2021-11-23 02:46:18,886 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_81 [2021-11-23 02:46:18,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_81 [2021-11-23 02:46:18,886 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2021-11-23 02:46:18,886 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2021-11-23 02:46:18,886 INFO L130 BoogieDeclarations]: Found specification of procedure cpumask_weight [2021-11-23 02:46:18,886 INFO L138 BoogieDeclarations]: Found implementation of procedure cpumask_weight [2021-11-23 02:46:18,886 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-11-23 02:46:18,887 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-11-23 02:46:18,887 INFO L130 BoogieDeclarations]: Found specification of procedure page_count [2021-11-23 02:46:18,887 INFO L138 BoogieDeclarations]: Found implementation of procedure page_count [2021-11-23 02:46:18,887 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-23 02:46:18,887 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-23 02:46:18,887 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_77 [2021-11-23 02:46:18,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_77 [2021-11-23 02:46:18,888 INFO L130 BoogieDeclarations]: Found specification of procedure cas_shutdown [2021-11-23 02:46:18,888 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_shutdown [2021-11-23 02:46:18,888 INFO L130 BoogieDeclarations]: Found specification of procedure cas_begin_auto_negotiation [2021-11-23 02:46:18,888 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_begin_auto_negotiation [2021-11-23 02:46:18,888 INFO L130 BoogieDeclarations]: Found specification of procedure skb_frag_page [2021-11-23 02:46:18,888 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_frag_page [2021-11-23 02:46:18,888 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-23 02:46:18,889 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-23 02:46:18,889 INFO L130 BoogieDeclarations]: Found specification of procedure cas_write_txd [2021-11-23 02:46:18,889 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_write_txd [2021-11-23 02:46:18,889 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-23 02:46:18,889 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-23 02:46:18,889 INFO L130 BoogieDeclarations]: Found specification of procedure __skb_frag_ref [2021-11-23 02:46:18,889 INFO L138 BoogieDeclarations]: Found implementation of procedure __skb_frag_ref [2021-11-23 02:46:18,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:46:18,890 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-23 02:46:18,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-23 02:46:18,890 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_82 [2021-11-23 02:46:18,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_82 [2021-11-23 02:46:18,890 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_84 [2021-11-23 02:46:18,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_84 [2021-11-23 02:46:18,891 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_79 [2021-11-23 02:46:18,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_79 [2021-11-23 02:46:18,891 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_inc [2021-11-23 02:46:18,891 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_inc [2021-11-23 02:46:18,891 INFO L130 BoogieDeclarations]: Found specification of procedure cas_init_hw [2021-11-23 02:46:18,891 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_init_hw [2021-11-23 02:46:18,891 INFO L130 BoogieDeclarations]: Found specification of procedure cas_clean_rings [2021-11-23 02:46:18,892 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_clean_rings [2021-11-23 02:46:18,892 INFO L130 BoogieDeclarations]: Found specification of procedure cas_page_free [2021-11-23 02:46:18,892 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_page_free [2021-11-23 02:46:18,892 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec [2021-11-23 02:46:18,892 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec [2021-11-23 02:46:18,892 INFO L130 BoogieDeclarations]: Found specification of procedure cas_phy_write [2021-11-23 02:46:18,892 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_phy_write [2021-11-23 02:46:18,893 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-23 02:46:18,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-23 02:46:18,893 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_work [2021-11-23 02:46:18,893 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_work [2021-11-23 02:46:18,893 INFO L130 BoogieDeclarations]: Found specification of procedure pci_iounmap [2021-11-23 02:46:18,893 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_iounmap [2021-11-23 02:46:18,893 INFO L130 BoogieDeclarations]: Found specification of procedure cas_spare_recover [2021-11-23 02:46:18,894 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_spare_recover [2021-11-23 02:46:18,894 INFO L130 BoogieDeclarations]: Found specification of procedure ethtool_cmd_speed [2021-11-23 02:46:18,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ethtool_cmd_speed [2021-11-23 02:46:18,894 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2021-11-23 02:46:18,894 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2021-11-23 02:46:18,894 INFO L130 BoogieDeclarations]: Found specification of procedure cas_get_stats [2021-11-23 02:46:18,894 INFO L138 BoogieDeclarations]: Found implementation of procedure cas_get_stats [2021-11-23 02:46:18,895 INFO L130 BoogieDeclarations]: Found specification of procedure readl [2021-11-23 02:46:18,895 INFO L138 BoogieDeclarations]: Found implementation of procedure readl [2021-11-23 02:46:18,895 INFO L130 BoogieDeclarations]: Found specification of procedure __kunmap_atomic [2021-11-23 02:46:18,895 INFO L138 BoogieDeclarations]: Found implementation of procedure __kunmap_atomic [2021-11-23 02:46:18,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:46:18,895 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-23 02:46:18,895 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-23 02:46:18,895 INFO L130 BoogieDeclarations]: Found specification of procedure pci_dma_sync_single_for_device [2021-11-23 02:46:18,896 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_dma_sync_single_for_device [2021-11-23 02:46:18,896 INFO L130 BoogieDeclarations]: Found specification of procedure readb [2021-11-23 02:46:18,896 INFO L138 BoogieDeclarations]: Found implementation of procedure readb [2021-11-23 02:46:18,896 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_107 [2021-11-23 02:46:18,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_107 [2021-11-23 02:46:20,520 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:46:20,525 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:46:20,844 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-23 02:50:07,406 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:50:13,809 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:50:13,809 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 02:50:13,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:50:13 BoogieIcfgContainer [2021-11-23 02:50:13,819 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:50:13,821 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:50:13,821 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:50:13,827 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:50:13,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:46:10" (1/3) ... [2021-11-23 02:50:13,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@baf0039 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:50:13, skipping insertion in model container [2021-11-23 02:50:13,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:17" (2/3) ... [2021-11-23 02:50:13,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@baf0039 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:50:13, skipping insertion in model container [2021-11-23 02:50:13,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:50:13" (3/3) ... [2021-11-23 02:50:13,830 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-sun-cassini.cil.i [2021-11-23 02:50:13,836 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:50:13,836 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-23 02:50:13,898 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:50:13,905 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:50:13,905 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-23 02:50:13,985 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) [2021-11-23 02:50:13,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-23 02:50:13,991 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:50:13,992 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:50:13,993 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:50:13,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:50:13,998 INFO L85 PathProgramCache]: Analyzing trace with hash -2057746181, now seen corresponding path program 1 times [2021-11-23 02:50:14,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:50:14,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508910683] [2021-11-23 02:50:14,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:50:14,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:50:14,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:50:15,100 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 02:50:15,101 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:50:15,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508910683] [2021-11-23 02:50:15,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508910683] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:50:15,102 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:50:15,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:50:15,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405866553] [2021-11-23 02:50:15,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:50:15,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:50:15,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:50:15,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:50:15,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:50:15,154 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) [2021-11-23 02:50:17,286 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:28,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:50:28,434 INFO L93 Difference]: Finished difference Result 7966 states and 12094 transitions. [2021-11-23 02:50:28,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:50:28,436 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 35 [2021-11-23 02:50:28,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:50:28,677 INFO L225 Difference]: With dead ends: 7966 [2021-11-23 02:50:28,678 INFO L226 Difference]: Without dead ends: 5144 [2021-11-23 02:50:28,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:50:28,716 INFO L933 BasicCegarLoop]: 4699 mSDtfsCounter, 3948 mSDsluCounter, 13811 mSDsCounter, 0 mSdLazyCounter, 1626 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3967 SdHoareTripleChecker+Valid, 17323 SdHoareTripleChecker+Invalid, 1630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1626 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:50:28,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3967 Valid, 17323 Invalid, 1630 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3 Valid, 1626 Invalid, 1 Unknown, 0 Unchecked, 12.5s Time] [2021-11-23 02:50:28,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5144 states. [2021-11-23 02:50:29,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5144 to 5136. [2021-11-23 02:50:29,228 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) [2021-11-23 02:50:29,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5136 states to 5136 states and 7558 transitions. [2021-11-23 02:50:29,302 INFO L78 Accepts]: Start accepts. Automaton has 5136 states and 7558 transitions. Word has length 35 [2021-11-23 02:50:29,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:50:29,303 INFO L470 AbstractCegarLoop]: Abstraction has 5136 states and 7558 transitions. [2021-11-23 02:50:29,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 02:50:29,304 INFO L276 IsEmpty]: Start isEmpty. Operand 5136 states and 7558 transitions. [2021-11-23 02:50:29,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-23 02:50:29,308 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:50:29,308 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:50:29,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:50:29,309 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:50:29,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:50:29,312 INFO L85 PathProgramCache]: Analyzing trace with hash 859194012, now seen corresponding path program 1 times [2021-11-23 02:50:29,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:50:29,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944604517] [2021-11-23 02:50:29,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:50:29,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:50:29,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:50:29,881 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 02:50:29,881 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:50:29,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944604517] [2021-11-23 02:50:29,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944604517] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:50:29,882 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:50:29,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:50:29,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88013765] [2021-11-23 02:50:29,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:50:29,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:50:29,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:50:29,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:50:29,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:50:29,884 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) [2021-11-23 02:50:31,989 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:40,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:50:40,623 INFO L93 Difference]: Finished difference Result 5146 states and 7567 transitions. [2021-11-23 02:50:40,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:50:40,623 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 [2021-11-23 02:50:40,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:50:40,679 INFO L225 Difference]: With dead ends: 5146 [2021-11-23 02:50:40,679 INFO L226 Difference]: Without dead ends: 5144 [2021-11-23 02:50:40,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:50:40,686 INFO L933 BasicCegarLoop]: 3706 mSDtfsCounter, 4074 mSDsluCounter, 8176 mSDsCounter, 0 mSdLazyCounter, 1211 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4091 SdHoareTripleChecker+Valid, 11092 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1211 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:50:40,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4091 Valid, 11092 Invalid, 1213 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 1211 Invalid, 1 Unknown, 0 Unchecked, 10.3s Time] [2021-11-23 02:50:40,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5144 states. [2021-11-23 02:50:41,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5144 to 5144. [2021-11-23 02:50:41,034 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) [2021-11-23 02:50:41,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5144 states to 5144 states and 7564 transitions. [2021-11-23 02:50:41,077 INFO L78 Accepts]: Start accepts. Automaton has 5144 states and 7564 transitions. Word has length 40 [2021-11-23 02:50:41,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:50:41,078 INFO L470 AbstractCegarLoop]: Abstraction has 5144 states and 7564 transitions. [2021-11-23 02:50:41,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:50:41,079 INFO L276 IsEmpty]: Start isEmpty. Operand 5144 states and 7564 transitions. [2021-11-23 02:50:41,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-23 02:50:41,081 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:50:41,082 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:50:41,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:50:41,082 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:50:41,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:50:41,083 INFO L85 PathProgramCache]: Analyzing trace with hash 508521822, now seen corresponding path program 1 times [2021-11-23 02:50:41,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:50:41,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372469124] [2021-11-23 02:50:41,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:50:41,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:50:41,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:50:41,633 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 02:50:41,634 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:50:41,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372469124] [2021-11-23 02:50:41,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372469124] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:50:41,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:50:41,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:50:41,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896657962] [2021-11-23 02:50:41,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:50:41,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:50:41,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:50:41,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:50:41,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:50:41,637 INFO L87 Difference]: Start difference. First operand 5144 states and 7564 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, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 02:50:43,713 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:51,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:50:51,411 INFO L93 Difference]: Finished difference Result 5154 states and 7573 transitions. [2021-11-23 02:50:51,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:50:51,412 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, (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 46 [2021-11-23 02:50:51,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:50:51,458 INFO L225 Difference]: With dead ends: 5154 [2021-11-23 02:50:51,459 INFO L226 Difference]: Without dead ends: 5152 [2021-11-23 02:50:51,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:50:51,465 INFO L933 BasicCegarLoop]: 3706 mSDtfsCounter, 4073 mSDsluCounter, 8176 mSDsCounter, 0 mSdLazyCounter, 1211 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4089 SdHoareTripleChecker+Valid, 11092 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1211 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:50:51,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4089 Valid, 11092 Invalid, 1213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1211 Invalid, 1 Unknown, 0 Unchecked, 9.4s Time] [2021-11-23 02:50:51,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5152 states. [2021-11-23 02:50:51,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5152 to 5152. [2021-11-23 02:50:51,796 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) [2021-11-23 02:50:51,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5152 states to 5152 states and 7570 transitions. [2021-11-23 02:50:51,828 INFO L78 Accepts]: Start accepts. Automaton has 5152 states and 7570 transitions. Word has length 46 [2021-11-23 02:50:51,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:50:51,829 INFO L470 AbstractCegarLoop]: Abstraction has 5152 states and 7570 transitions. [2021-11-23 02:50:51,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 02:50:51,830 INFO L276 IsEmpty]: Start isEmpty. Operand 5152 states and 7570 transitions. [2021-11-23 02:50:51,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-23 02:50:51,835 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:50:51,835 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:50:51,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:50:51,836 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:50:51,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:50:51,836 INFO L85 PathProgramCache]: Analyzing trace with hash -610233447, now seen corresponding path program 1 times [2021-11-23 02:50:51,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:50:51,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325704160] [2021-11-23 02:50:51,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:50:51,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:50:52,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:50:52,336 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-23 02:50:52,337 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:50:52,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325704160] [2021-11-23 02:50:52,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325704160] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:50:52,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:50:52,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:50:52,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26018253] [2021-11-23 02:50:52,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:50:52,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:50:52,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:50:52,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:50:52,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:50:52,339 INFO L87 Difference]: Start difference. First operand 5152 states and 7570 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, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-23 02:50:54,450 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:51:02,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:51:02,738 INFO L93 Difference]: Finished difference Result 5162 states and 7579 transitions. [2021-11-23 02:51:02,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:51:02,739 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, (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 51 [2021-11-23 02:51:02,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:51:02,789 INFO L225 Difference]: With dead ends: 5162 [2021-11-23 02:51:02,790 INFO L226 Difference]: Without dead ends: 5160 [2021-11-23 02:51:02,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:51:02,796 INFO L933 BasicCegarLoop]: 3706 mSDtfsCounter, 4073 mSDsluCounter, 8176 mSDsCounter, 0 mSdLazyCounter, 1211 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4088 SdHoareTripleChecker+Valid, 11092 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1211 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:51:02,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4088 Valid, 11092 Invalid, 1213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1211 Invalid, 1 Unknown, 0 Unchecked, 10.1s Time] [2021-11-23 02:51:02,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5160 states. [2021-11-23 02:51:03,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5160 to 5160. [2021-11-23 02:51:03,142 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) [2021-11-23 02:51:03,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5160 states to 5160 states and 7576 transitions. [2021-11-23 02:51:03,176 INFO L78 Accepts]: Start accepts. Automaton has 5160 states and 7576 transitions. Word has length 51 [2021-11-23 02:51:03,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:51:03,176 INFO L470 AbstractCegarLoop]: Abstraction has 5160 states and 7576 transitions. [2021-11-23 02:51:03,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-23 02:51:03,177 INFO L276 IsEmpty]: Start isEmpty. Operand 5160 states and 7576 transitions. [2021-11-23 02:51:03,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-23 02:51:03,182 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:51:03,182 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:51:03,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:51:03,183 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:51:03,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:51:03,183 INFO L85 PathProgramCache]: Analyzing trace with hash 98710014, now seen corresponding path program 1 times [2021-11-23 02:51:03,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:51:03,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348997145] [2021-11-23 02:51:03,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:03,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:51:03,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:03,721 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-23 02:51:03,721 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:51:03,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348997145] [2021-11-23 02:51:03,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348997145] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:51:03,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:51:03,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:51:03,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789199497] [2021-11-23 02:51:03,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:51:03,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:51:03,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:51:03,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:51:03,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:51:03,724 INFO L87 Difference]: Start difference. First operand 5160 states and 7576 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-23 02:51:05,828 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:51:14,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:51:14,020 INFO L93 Difference]: Finished difference Result 5170 states and 7585 transitions. [2021-11-23 02:51:14,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:51:14,021 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 56 [2021-11-23 02:51:14,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:51:14,071 INFO L225 Difference]: With dead ends: 5170 [2021-11-23 02:51:14,072 INFO L226 Difference]: Without dead ends: 5168 [2021-11-23 02:51:14,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:51:14,076 INFO L933 BasicCegarLoop]: 3706 mSDtfsCounter, 4073 mSDsluCounter, 8176 mSDsCounter, 0 mSdLazyCounter, 1211 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4087 SdHoareTripleChecker+Valid, 11092 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1211 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:51:14,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4087 Valid, 11092 Invalid, 1213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1211 Invalid, 1 Unknown, 0 Unchecked, 9.8s Time] [2021-11-23 02:51:14,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5168 states. [2021-11-23 02:51:14,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5168 to 5168. [2021-11-23 02:51:14,462 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) [2021-11-23 02:51:14,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5168 states to 5168 states and 7582 transitions. [2021-11-23 02:51:14,501 INFO L78 Accepts]: Start accepts. Automaton has 5168 states and 7582 transitions. Word has length 56 [2021-11-23 02:51:14,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:51:14,502 INFO L470 AbstractCegarLoop]: Abstraction has 5168 states and 7582 transitions. [2021-11-23 02:51:14,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-23 02:51:14,502 INFO L276 IsEmpty]: Start isEmpty. Operand 5168 states and 7582 transitions. [2021-11-23 02:51:14,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-23 02:51:14,504 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:51:14,504 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:51:14,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:51:14,505 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:51:14,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:51:14,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1831041244, now seen corresponding path program 1 times [2021-11-23 02:51:14,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:51:14,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916413633] [2021-11-23 02:51:14,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:14,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:51:14,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:15,007 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-23 02:51:15,007 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:51:15,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916413633] [2021-11-23 02:51:15,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916413633] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:51:15,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:51:15,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:51:15,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205189835] [2021-11-23 02:51:15,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:51:15,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:51:15,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:51:15,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:51:15,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:51:15,009 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) [2021-11-23 02:51:17,121 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:51:23,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:51:23,737 INFO L93 Difference]: Finished difference Result 5178 states and 7591 transitions. [2021-11-23 02:51:23,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:51:23,737 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 [2021-11-23 02:51:23,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:51:23,771 INFO L225 Difference]: With dead ends: 5178 [2021-11-23 02:51:23,771 INFO L226 Difference]: Without dead ends: 5176 [2021-11-23 02:51:23,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:51:23,776 INFO L933 BasicCegarLoop]: 3706 mSDtfsCounter, 4074 mSDsluCounter, 8176 mSDsCounter, 0 mSdLazyCounter, 1211 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4087 SdHoareTripleChecker+Valid, 11092 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1211 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:51:23,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4087 Valid, 11092 Invalid, 1213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1211 Invalid, 1 Unknown, 0 Unchecked, 8.4s Time] [2021-11-23 02:51:23,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5176 states. [2021-11-23 02:51:24,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5176 to 5176. [2021-11-23 02:51:24,095 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) [2021-11-23 02:51:24,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5176 states to 5176 states and 7588 transitions. [2021-11-23 02:51:24,127 INFO L78 Accepts]: Start accepts. Automaton has 5176 states and 7588 transitions. Word has length 60 [2021-11-23 02:51:24,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:51:24,127 INFO L470 AbstractCegarLoop]: Abstraction has 5176 states and 7588 transitions. [2021-11-23 02:51:24,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-23 02:51:24,128 INFO L276 IsEmpty]: Start isEmpty. Operand 5176 states and 7588 transitions. [2021-11-23 02:51:24,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-23 02:51:24,129 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:51:24,129 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:51:24,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 02:51:24,130 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:51:24,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:51:24,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1764843166, now seen corresponding path program 1 times [2021-11-23 02:51:24,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:51:24,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685391925] [2021-11-23 02:51:24,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:24,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:51:24,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:24,605 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-23 02:51:24,606 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:51:24,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685391925] [2021-11-23 02:51:24,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685391925] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:51:24,606 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:51:24,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:51:24,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835424284] [2021-11-23 02:51:24,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:51:24,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:51:24,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:51:24,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:51:24,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:51:24,608 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) [2021-11-23 02:51:26,716 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:51:34,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:51:34,157 INFO L93 Difference]: Finished difference Result 5186 states and 7597 transitions. [2021-11-23 02:51:34,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:51:34,157 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 [2021-11-23 02:51:34,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:51:34,183 INFO L225 Difference]: With dead ends: 5186 [2021-11-23 02:51:34,184 INFO L226 Difference]: Without dead ends: 5184 [2021-11-23 02:51:34,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:51:34,189 INFO L933 BasicCegarLoop]: 3706 mSDtfsCounter, 4073 mSDsluCounter, 8176 mSDsCounter, 0 mSdLazyCounter, 1211 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4085 SdHoareTripleChecker+Valid, 11092 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1211 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:51:34,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4085 Valid, 11092 Invalid, 1213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1211 Invalid, 1 Unknown, 0 Unchecked, 9.2s Time] [2021-11-23 02:51:34,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5184 states. [2021-11-23 02:51:34,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5184 to 5184. [2021-11-23 02:51:34,514 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) [2021-11-23 02:51:34,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5184 states to 5184 states and 7594 transitions. [2021-11-23 02:51:34,545 INFO L78 Accepts]: Start accepts. Automaton has 5184 states and 7594 transitions. Word has length 66 [2021-11-23 02:51:34,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:51:34,546 INFO L470 AbstractCegarLoop]: Abstraction has 5184 states and 7594 transitions. [2021-11-23 02:51:34,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-23 02:51:34,546 INFO L276 IsEmpty]: Start isEmpty. Operand 5184 states and 7594 transitions. [2021-11-23 02:51:34,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-23 02:51:34,549 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:51:34,549 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:51:34,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 02:51:34,550 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:51:34,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:51:34,551 INFO L85 PathProgramCache]: Analyzing trace with hash 731840508, now seen corresponding path program 1 times [2021-11-23 02:51:34,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:51:34,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144957977] [2021-11-23 02:51:34,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:34,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:51:34,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:34,975 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-23 02:51:34,976 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:51:34,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144957977] [2021-11-23 02:51:34,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144957977] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:51:34,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:51:34,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:51:34,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776472825] [2021-11-23 02:51:34,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:51:34,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:51:34,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:51:34,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:51:34,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:51:34,977 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) [2021-11-23 02:51:37,048 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:51:49,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:51:49,400 INFO L93 Difference]: Finished difference Result 7329 states and 10612 transitions. [2021-11-23 02:51:49,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:51:49,400 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 [2021-11-23 02:51:49,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:51:49,434 INFO L225 Difference]: With dead ends: 7329 [2021-11-23 02:51:49,434 INFO L226 Difference]: Without dead ends: 7327 [2021-11-23 02:51:49,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:51:49,438 INFO L933 BasicCegarLoop]: 5000 mSDtfsCounter, 3048 mSDsluCounter, 13543 mSDsCounter, 0 mSdLazyCounter, 1775 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3059 SdHoareTripleChecker+Valid, 17303 SdHoareTripleChecker+Invalid, 1778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1775 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:51:49,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3059 Valid, 17303 Invalid, 1778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1775 Invalid, 1 Unknown, 0 Unchecked, 13.8s Time] [2021-11-23 02:51:49,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7327 states. [2021-11-23 02:51:49,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7327 to 7319. [2021-11-23 02:51:49,903 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) [2021-11-23 02:51:49,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7319 states to 7319 states and 10603 transitions. [2021-11-23 02:51:49,949 INFO L78 Accepts]: Start accepts. Automaton has 7319 states and 10603 transitions. Word has length 70 [2021-11-23 02:51:49,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:51:49,949 INFO L470 AbstractCegarLoop]: Abstraction has 7319 states and 10603 transitions. [2021-11-23 02:51:49,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-23 02:51:49,950 INFO L276 IsEmpty]: Start isEmpty. Operand 7319 states and 10603 transitions. [2021-11-23 02:51:49,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-23 02:51:49,954 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:51:49,954 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:51:49,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 02:51:49,955 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:51:49,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:51:49,955 INFO L85 PathProgramCache]: Analyzing trace with hash -110400901, now seen corresponding path program 1 times [2021-11-23 02:51:49,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:51:49,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078172117] [2021-11-23 02:51:49,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:49,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:51:50,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:50,423 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2021-11-23 02:51:50,423 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:51:50,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078172117] [2021-11-23 02:51:50,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078172117] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:51:50,423 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:51:50,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:51:50,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292585799] [2021-11-23 02:51:50,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:51:50,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:51:50,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:51:50,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:51:50,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:51:50,425 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) [2021-11-23 02:51:52,530 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:52:00,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:52:00,070 INFO L93 Difference]: Finished difference Result 7329 states and 10612 transitions. [2021-11-23 02:52:00,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:52:00,077 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 [2021-11-23 02:52:00,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:52:00,115 INFO L225 Difference]: With dead ends: 7329 [2021-11-23 02:52:00,115 INFO L226 Difference]: Without dead ends: 7327 [2021-11-23 02:52:00,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:52:00,122 INFO L933 BasicCegarLoop]: 3706 mSDtfsCounter, 4074 mSDsluCounter, 8176 mSDsCounter, 0 mSdLazyCounter, 1211 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4084 SdHoareTripleChecker+Valid, 11092 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1211 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:52:00,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4084 Valid, 11092 Invalid, 1213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1211 Invalid, 1 Unknown, 0 Unchecked, 9.2s Time] [2021-11-23 02:52:00,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7327 states. [2021-11-23 02:52:00,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7327 to 7327. [2021-11-23 02:52:00,600 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) [2021-11-23 02:52:00,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7327 states to 7327 states and 10609 transitions. [2021-11-23 02:52:00,643 INFO L78 Accepts]: Start accepts. Automaton has 7327 states and 10609 transitions. Word has length 75 [2021-11-23 02:52:00,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:52:00,644 INFO L470 AbstractCegarLoop]: Abstraction has 7327 states and 10609 transitions. [2021-11-23 02:52:00,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-23 02:52:00,645 INFO L276 IsEmpty]: Start isEmpty. Operand 7327 states and 10609 transitions. [2021-11-23 02:52:00,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-23 02:52:00,650 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:52:00,650 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:52:00,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 02:52:00,650 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:52:00,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:52:00,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1515860196, now seen corresponding path program 1 times [2021-11-23 02:52:00,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:52:00,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607825939] [2021-11-23 02:52:00,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:52:00,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:52:00,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:52:01,129 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-11-23 02:52:01,130 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:52:01,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607825939] [2021-11-23 02:52:01,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607825939] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:52:01,130 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:52:01,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:52:01,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132801697] [2021-11-23 02:52:01,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:52:01,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:52:01,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:52:01,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:52:01,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:52:01,132 INFO L87 Difference]: Start difference. First operand 7327 states and 10609 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-23 02:52:03,237 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:52:11,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:52:11,832 INFO L93 Difference]: Finished difference Result 7337 states and 10618 transitions. [2021-11-23 02:52:11,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:52:11,833 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 80 [2021-11-23 02:52:11,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:52:11,880 INFO L225 Difference]: With dead ends: 7337 [2021-11-23 02:52:11,880 INFO L226 Difference]: Without dead ends: 7335 [2021-11-23 02:52:11,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:52:11,888 INFO L933 BasicCegarLoop]: 3706 mSDtfsCounter, 4074 mSDsluCounter, 8176 mSDsCounter, 0 mSdLazyCounter, 1211 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4083 SdHoareTripleChecker+Valid, 11092 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1211 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:52:11,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4083 Valid, 11092 Invalid, 1213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1211 Invalid, 1 Unknown, 0 Unchecked, 10.2s Time] [2021-11-23 02:52:11,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7335 states. [2021-11-23 02:52:12,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7335 to 7335. [2021-11-23 02:52:12,670 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) [2021-11-23 02:52:12,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7335 states to 7335 states and 10615 transitions. [2021-11-23 02:52:12,713 INFO L78 Accepts]: Start accepts. Automaton has 7335 states and 10615 transitions. Word has length 80 [2021-11-23 02:52:12,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:52:12,714 INFO L470 AbstractCegarLoop]: Abstraction has 7335 states and 10615 transitions. [2021-11-23 02:52:12,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-23 02:52:12,714 INFO L276 IsEmpty]: Start isEmpty. Operand 7335 states and 10615 transitions. [2021-11-23 02:52:12,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-23 02:52:12,716 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:52:12,716 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:52:12,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 02:52:12,717 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:52:12,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:52:12,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1811738590, now seen corresponding path program 1 times [2021-11-23 02:52:12,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:52:12,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442924576] [2021-11-23 02:52:12,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:52:12,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:52:12,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:52:13,180 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2021-11-23 02:52:13,180 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:52:13,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442924576] [2021-11-23 02:52:13,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442924576] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:52:13,180 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:52:13,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:52:13,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989045241] [2021-11-23 02:52:13,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:52:13,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:52:13,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:52:13,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:52:13,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:52:13,182 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) [2021-11-23 02:52:15,290 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:52:23,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:52:23,162 INFO L93 Difference]: Finished difference Result 7345 states and 10624 transitions. [2021-11-23 02:52:23,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:52:23,162 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 86 [2021-11-23 02:52:23,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:52:23,199 INFO L225 Difference]: With dead ends: 7345 [2021-11-23 02:52:23,199 INFO L226 Difference]: Without dead ends: 7343 [2021-11-23 02:52:23,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:52:23,205 INFO L933 BasicCegarLoop]: 3706 mSDtfsCounter, 4073 mSDsluCounter, 8176 mSDsCounter, 0 mSdLazyCounter, 1211 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4081 SdHoareTripleChecker+Valid, 11092 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1211 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:52:23,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4081 Valid, 11092 Invalid, 1213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1211 Invalid, 1 Unknown, 0 Unchecked, 9.4s Time] [2021-11-23 02:52:23,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7343 states. [2021-11-23 02:52:23,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7343 to 7343. [2021-11-23 02:52:23,713 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) [2021-11-23 02:52:23,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7343 states to 7343 states and 10621 transitions. [2021-11-23 02:52:23,757 INFO L78 Accepts]: Start accepts. Automaton has 7343 states and 10621 transitions. Word has length 86 [2021-11-23 02:52:23,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:52:23,758 INFO L470 AbstractCegarLoop]: Abstraction has 7343 states and 10621 transitions. [2021-11-23 02:52:23,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-23 02:52:23,758 INFO L276 IsEmpty]: Start isEmpty. Operand 7343 states and 10621 transitions. [2021-11-23 02:52:23,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-23 02:52:23,760 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:52:23,761 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:52:23,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 02:52:23,762 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:52:23,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:52:23,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1016504551, now seen corresponding path program 1 times [2021-11-23 02:52:23,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:52:23,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795812137] [2021-11-23 02:52:23,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:52:23,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:52:23,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:52:24,200 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-23 02:52:24,200 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:52:24,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795812137] [2021-11-23 02:52:24,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795812137] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:52:24,201 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:52:24,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:52:24,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697162573] [2021-11-23 02:52:24,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:52:24,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:52:24,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:52:24,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:52:24,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:52:24,202 INFO L87 Difference]: Start difference. First operand 7343 states and 10621 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 02:52:26,304 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:52:34,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:52:34,185 INFO L93 Difference]: Finished difference Result 7353 states and 10630 transitions. [2021-11-23 02:52:34,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:52:34,185 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 91 [2021-11-23 02:52:34,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:52:34,222 INFO L225 Difference]: With dead ends: 7353 [2021-11-23 02:52:34,222 INFO L226 Difference]: Without dead ends: 7351 [2021-11-23 02:52:34,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:52:34,229 INFO L933 BasicCegarLoop]: 3706 mSDtfsCounter, 4073 mSDsluCounter, 8176 mSDsCounter, 0 mSdLazyCounter, 1211 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4080 SdHoareTripleChecker+Valid, 11092 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1211 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:52:34,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4080 Valid, 11092 Invalid, 1213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1211 Invalid, 1 Unknown, 0 Unchecked, 9.5s Time] [2021-11-23 02:52:34,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7351 states. [2021-11-23 02:52:34,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7351 to 7351. [2021-11-23 02:52:34,751 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) [2021-11-23 02:52:34,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7351 states to 7351 states and 10627 transitions. [2021-11-23 02:52:34,791 INFO L78 Accepts]: Start accepts. Automaton has 7351 states and 10627 transitions. Word has length 91 [2021-11-23 02:52:34,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:52:34,794 INFO L470 AbstractCegarLoop]: Abstraction has 7351 states and 10627 transitions. [2021-11-23 02:52:34,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 02:52:34,794 INFO L276 IsEmpty]: Start isEmpty. Operand 7351 states and 10627 transitions. [2021-11-23 02:52:34,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-23 02:52:34,796 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:52:34,796 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:52:34,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 02:52:34,797 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:52:34,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:52:34,797 INFO L85 PathProgramCache]: Analyzing trace with hash -30059394, now seen corresponding path program 1 times [2021-11-23 02:52:34,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:52:34,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858597076] [2021-11-23 02:52:34,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:52:34,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:52:34,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:52:35,229 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-11-23 02:52:35,230 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:52:35,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858597076] [2021-11-23 02:52:35,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858597076] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:52:35,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:52:35,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:52:35,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386217996] [2021-11-23 02:52:35,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:52:35,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:52:35,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:52:35,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:52:35,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:52:35,232 INFO L87 Difference]: Start difference. First operand 7351 states and 10627 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-23 02:52:37,335 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:52:44,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:52:44,779 INFO L93 Difference]: Finished difference Result 7481 states and 10745 transitions. [2021-11-23 02:52:44,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:52:44,779 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 96 [2021-11-23 02:52:44,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:52:44,809 INFO L225 Difference]: With dead ends: 7481 [2021-11-23 02:52:44,809 INFO L226 Difference]: Without dead ends: 7479 [2021-11-23 02:52:44,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:52:44,815 INFO L933 BasicCegarLoop]: 3728 mSDtfsCounter, 4037 mSDsluCounter, 8290 mSDsCounter, 0 mSdLazyCounter, 1221 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4043 SdHoareTripleChecker+Valid, 11220 SdHoareTripleChecker+Invalid, 1224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1221 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:52:44,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4043 Valid, 11220 Invalid, 1224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1221 Invalid, 1 Unknown, 0 Unchecked, 9.1s Time] [2021-11-23 02:52:44,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7479 states. [2021-11-23 02:52:45,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7479 to 7477. [2021-11-23 02:52:45,425 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) [2021-11-23 02:52:45,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7477 states to 7477 states and 10741 transitions. [2021-11-23 02:52:45,469 INFO L78 Accepts]: Start accepts. Automaton has 7477 states and 10741 transitions. Word has length 96 [2021-11-23 02:52:45,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:52:45,469 INFO L470 AbstractCegarLoop]: Abstraction has 7477 states and 10741 transitions. [2021-11-23 02:52:45,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-23 02:52:45,470 INFO L276 IsEmpty]: Start isEmpty. Operand 7477 states and 10741 transitions. [2021-11-23 02:52:45,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-23 02:52:45,472 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:52:45,472 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:52:45,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 02:52:45,473 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:52:45,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:52:45,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1362418143, now seen corresponding path program 1 times [2021-11-23 02:52:45,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:52:45,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392123206] [2021-11-23 02:52:45,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:52:45,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:52:45,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:52:46,066 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-23 02:52:46,066 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:52:46,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392123206] [2021-11-23 02:52:46,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392123206] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:52:46,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:52:46,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:52:46,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52104555] [2021-11-23 02:52:46,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:52:46,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:52:46,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:52:46,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:52:46,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:52:46,068 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) [2021-11-23 02:52:48,173 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:52:58,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:52:58,477 INFO L93 Difference]: Finished difference Result 7495 states and 10756 transitions. [2021-11-23 02:52:58,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:52:58,478 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 [2021-11-23 02:52:58,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:52:58,499 INFO L225 Difference]: With dead ends: 7495 [2021-11-23 02:52:58,499 INFO L226 Difference]: Without dead ends: 7493 [2021-11-23 02:52:58,503 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:52:58,503 INFO L933 BasicCegarLoop]: 5003 mSDtfsCounter, 3038 mSDsluCounter, 13565 mSDsCounter, 0 mSdLazyCounter, 1765 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3043 SdHoareTripleChecker+Valid, 17330 SdHoareTripleChecker+Invalid, 1768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1765 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:52:58,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3043 Valid, 17330 Invalid, 1768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1765 Invalid, 1 Unknown, 0 Unchecked, 11.9s Time] [2021-11-23 02:52:58,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7493 states. [2021-11-23 02:52:59,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7493 to 7485. [2021-11-23 02:52:59,037 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) [2021-11-23 02:52:59,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7485 states to 7485 states and 10747 transitions. [2021-11-23 02:52:59,079 INFO L78 Accepts]: Start accepts. Automaton has 7485 states and 10747 transitions. Word has length 114 [2021-11-23 02:52:59,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:52:59,080 INFO L470 AbstractCegarLoop]: Abstraction has 7485 states and 10747 transitions. [2021-11-23 02:52:59,080 INFO L471 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) [2021-11-23 02:52:59,081 INFO L276 IsEmpty]: Start isEmpty. Operand 7485 states and 10747 transitions. [2021-11-23 02:52:59,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-23 02:52:59,083 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:52:59,083 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:52:59,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 02:52:59,084 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:52:59,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:52:59,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1978593799, now seen corresponding path program 1 times [2021-11-23 02:52:59,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:52:59,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959124463] [2021-11-23 02:52:59,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:52:59,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:52:59,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:52:59,542 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked. [2021-11-23 02:52:59,543 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:52:59,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959124463] [2021-11-23 02:52:59,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959124463] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:52:59,543 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:52:59,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:52:59,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191767464] [2021-11-23 02:52:59,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:52:59,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:52:59,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:52:59,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:52:59,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:52:59,545 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) [2021-11-23 02:53:01,657 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:53:09,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:53:09,703 INFO L93 Difference]: Finished difference Result 7561 states and 10799 transitions. [2021-11-23 02:53:09,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:53:09,703 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 [2021-11-23 02:53:09,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:53:09,728 INFO L225 Difference]: With dead ends: 7561 [2021-11-23 02:53:09,728 INFO L226 Difference]: Without dead ends: 7559 [2021-11-23 02:53:09,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:53:09,734 INFO L933 BasicCegarLoop]: 3711 mSDtfsCounter, 4018 mSDsluCounter, 8280 mSDsCounter, 0 mSdLazyCounter, 1229 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4023 SdHoareTripleChecker+Valid, 11187 SdHoareTripleChecker+Invalid, 1232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1229 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:53:09,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4023 Valid, 11187 Invalid, 1232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1229 Invalid, 1 Unknown, 0 Unchecked, 9.6s Time] [2021-11-23 02:53:09,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7559 states. [2021-11-23 02:53:10,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7559 to 7557. [2021-11-23 02:53:10,269 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) [2021-11-23 02:53:10,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7557 states to 7557 states and 10795 transitions. [2021-11-23 02:53:10,314 INFO L78 Accepts]: Start accepts. Automaton has 7557 states and 10795 transitions. Word has length 101 [2021-11-23 02:53:10,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:53:10,315 INFO L470 AbstractCegarLoop]: Abstraction has 7557 states and 10795 transitions. [2021-11-23 02:53:10,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (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) [2021-11-23 02:53:10,316 INFO L276 IsEmpty]: Start isEmpty. Operand 7557 states and 10795 transitions. [2021-11-23 02:53:10,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-23 02:53:10,318 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:53:10,319 INFO L514 BasicCegarLoop]: 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, 1] [2021-11-23 02:53:10,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 02:53:10,319 INFO L402 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)] === [2021-11-23 02:53:10,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:53:10,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1314774754, now seen corresponding path program 1 times [2021-11-23 02:53:10,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:53:10,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116941533] [2021-11-23 02:53:10,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:53:10,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:53:10,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:53:10,794 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 375 trivial. 0 not checked. [2021-11-23 02:53:10,795 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:53:10,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116941533] [2021-11-23 02:53:10,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116941533] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:53:10,795 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:53:10,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:53:10,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003698057] [2021-11-23 02:53:10,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:53:10,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:53:10,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:53:10,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:53:10,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:53:10,797 INFO L87 Difference]: Start difference. First operand 7557 states and 10795 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, (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) [2021-11-23 02:53:12,908 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:53:22,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:53:22,196 INFO L93 Difference]: Finished difference Result 7567 states and 10804 transitions. [2021-11-23 02:53:22,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:53:22,200 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, (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 106 [2021-11-23 02:53:22,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:53:22,228 INFO L225 Difference]: With dead ends: 7567 [2021-11-23 02:53:22,229 INFO L226 Difference]: Without dead ends: 7565 [2021-11-23 02:53:22,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:53:22,234 INFO L933 BasicCegarLoop]: 3706 mSDtfsCounter, 4073 mSDsluCounter, 8176 mSDsCounter, 0 mSdLazyCounter, 1211 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4077 SdHoareTripleChecker+Valid, 11092 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1211 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:53:22,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4077 Valid, 11092 Invalid, 1213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1211 Invalid, 1 Unknown, 0 Unchecked, 10.8s Time] [2021-11-23 02:53:22,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7565 states. [2021-11-23 02:53:22,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7565 to 7565. [2021-11-23 02:53:22,720 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) [2021-11-23 02:53:22,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7565 states to 7565 states and 10801 transitions. [2021-11-23 02:53:22,753 INFO L78 Accepts]: Start accepts. Automaton has 7565 states and 10801 transitions. Word has length 106 [2021-11-23 02:53:22,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:53:22,753 INFO L470 AbstractCegarLoop]: Abstraction has 7565 states and 10801 transitions. [2021-11-23 02:53:22,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (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) [2021-11-23 02:53:22,754 INFO L276 IsEmpty]: Start isEmpty. Operand 7565 states and 10801 transitions. [2021-11-23 02:53:22,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-23 02:53:22,756 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:53:22,757 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:53:22,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 02:53:22,757 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:53:22,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:53:22,758 INFO L85 PathProgramCache]: Analyzing trace with hash -256250756, now seen corresponding path program 1 times [2021-11-23 02:53:22,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:53:22,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060064897] [2021-11-23 02:53:22,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:53:22,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:53:22,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:53:23,203 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 431 trivial. 0 not checked. [2021-11-23 02:53:23,203 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:53:23,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060064897] [2021-11-23 02:53:23,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060064897] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:53:23,203 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:53:23,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:53:23,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694572731] [2021-11-23 02:53:23,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:53:23,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:53:23,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:53:23,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:53:23,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:53:23,205 INFO L87 Difference]: Start difference. First operand 7565 states and 10801 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, (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) [2021-11-23 02:53:25,299 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:53:34,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:53:34,344 INFO L93 Difference]: Finished difference Result 7575 states and 10810 transitions. [2021-11-23 02:53:34,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:53:34,345 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, (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 110 [2021-11-23 02:53:34,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:53:34,370 INFO L225 Difference]: With dead ends: 7575 [2021-11-23 02:53:34,370 INFO L226 Difference]: Without dead ends: 7573 [2021-11-23 02:53:34,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:53:34,375 INFO L933 BasicCegarLoop]: 3706 mSDtfsCounter, 4074 mSDsluCounter, 8176 mSDsCounter, 0 mSdLazyCounter, 1211 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4077 SdHoareTripleChecker+Valid, 11092 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1211 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:53:34,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4077 Valid, 11092 Invalid, 1213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1211 Invalid, 1 Unknown, 0 Unchecked, 10.6s Time] [2021-11-23 02:53:34,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7573 states. [2021-11-23 02:53:34,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7573 to 7573. [2021-11-23 02:53:34,926 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) [2021-11-23 02:53:34,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7573 states to 7573 states and 10807 transitions. [2021-11-23 02:53:34,955 INFO L78 Accepts]: Start accepts. Automaton has 7573 states and 10807 transitions. Word has length 110 [2021-11-23 02:53:34,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:53:34,956 INFO L470 AbstractCegarLoop]: Abstraction has 7573 states and 10807 transitions. [2021-11-23 02:53:34,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (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) [2021-11-23 02:53:34,956 INFO L276 IsEmpty]: Start isEmpty. Operand 7573 states and 10807 transitions. [2021-11-23 02:53:34,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-23 02:53:34,960 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:53:34,960 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:53:34,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-23 02:53:34,960 INFO L402 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)] === [2021-11-23 02:53:34,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:53:34,962 INFO L85 PathProgramCache]: Analyzing trace with hash -409400325, now seen corresponding path program 1 times [2021-11-23 02:53:34,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:53:34,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148635974] [2021-11-23 02:53:34,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:53:34,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:53:35,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:53:35,389 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 491 trivial. 0 not checked. [2021-11-23 02:53:35,390 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:53:35,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148635974] [2021-11-23 02:53:35,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148635974] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:53:35,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:53:35,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:53:35,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508024692] [2021-11-23 02:53:35,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:53:35,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:53:35,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:53:35,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:53:35,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:53:35,392 INFO L87 Difference]: Start difference. First operand 7573 states and 10807 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, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-23 02:53:37,467 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:53:45,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:53:45,101 INFO L93 Difference]: Finished difference Result 7583 states and 10816 transitions. [2021-11-23 02:53:45,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:53:45,102 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, (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 115 [2021-11-23 02:53:45,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:53:45,135 INFO L225 Difference]: With dead ends: 7583 [2021-11-23 02:53:45,135 INFO L226 Difference]: Without dead ends: 7581 [2021-11-23 02:53:45,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:53:45,141 INFO L933 BasicCegarLoop]: 3706 mSDtfsCounter, 4074 mSDsluCounter, 8176 mSDsCounter, 0 mSdLazyCounter, 1211 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4076 SdHoareTripleChecker+Valid, 11092 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1211 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:53:45,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4076 Valid, 11092 Invalid, 1213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1211 Invalid, 1 Unknown, 0 Unchecked, 9.1s Time] [2021-11-23 02:53:45,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7581 states. [2021-11-23 02:53:45,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7581 to 7581. [2021-11-23 02:53:45,593 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) [2021-11-23 02:53:45,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7581 states to 7581 states and 10813 transitions. [2021-11-23 02:53:45,626 INFO L78 Accepts]: Start accepts. Automaton has 7581 states and 10813 transitions. Word has length 115 [2021-11-23 02:53:45,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:53:45,627 INFO L470 AbstractCegarLoop]: Abstraction has 7581 states and 10813 transitions. [2021-11-23 02:53:45,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-23 02:53:45,627 INFO L276 IsEmpty]: Start isEmpty. Operand 7581 states and 10813 transitions. [2021-11-23 02:53:45,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-23 02:53:45,630 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:53:45,631 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:53:45,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-23 02:53:45,631 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:53:45,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:53:45,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1640081765, now seen corresponding path program 1 times [2021-11-23 02:53:45,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:53:45,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65442222] [2021-11-23 02:53:45,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:53:45,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:53:45,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:53:46,201 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-11-23 02:53:46,201 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:53:46,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65442222] [2021-11-23 02:53:46,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65442222] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:53:46,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:53:46,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:53:46,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215383721] [2021-11-23 02:53:46,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:53:46,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:53:46,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:53:46,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:53:46,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:53:46,204 INFO L87 Difference]: Start difference. First operand 7581 states and 10813 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-23 02:53:48,311 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:53:59,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:53:59,517 INFO L93 Difference]: Finished difference Result 7601 states and 10829 transitions. [2021-11-23 02:53:59,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:53:59,517 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 137 [2021-11-23 02:53:59,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:53:59,542 INFO L225 Difference]: With dead ends: 7601 [2021-11-23 02:53:59,542 INFO L226 Difference]: Without dead ends: 7599 [2021-11-23 02:53:59,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:53:59,548 INFO L933 BasicCegarLoop]: 4731 mSDtfsCounter, 3912 mSDsluCounter, 13875 mSDsCounter, 0 mSdLazyCounter, 1622 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3917 SdHoareTripleChecker+Valid, 17413 SdHoareTripleChecker+Invalid, 1626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1622 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:53:59,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3917 Valid, 17413 Invalid, 1626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1622 Invalid, 1 Unknown, 0 Unchecked, 12.7s Time] [2021-11-23 02:53:59,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7599 states. [2021-11-23 02:54:00,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7599 to 7589. [2021-11-23 02:54:00,090 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) [2021-11-23 02:54:00,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7589 states to 7589 states and 10819 transitions. [2021-11-23 02:54:00,119 INFO L78 Accepts]: Start accepts. Automaton has 7589 states and 10819 transitions. Word has length 137 [2021-11-23 02:54:00,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:54:00,120 INFO L470 AbstractCegarLoop]: Abstraction has 7589 states and 10819 transitions. [2021-11-23 02:54:00,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-23 02:54:00,120 INFO L276 IsEmpty]: Start isEmpty. Operand 7589 states and 10819 transitions. [2021-11-23 02:54:00,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-23 02:54:00,122 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:54:00,123 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:54:00,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-23 02:54:00,123 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:54:00,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:54:00,123 INFO L85 PathProgramCache]: Analyzing trace with hash 409482169, now seen corresponding path program 1 times [2021-11-23 02:54:00,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:54:00,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517918676] [2021-11-23 02:54:00,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:54:00,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:54:00,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:54:00,563 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2021-11-23 02:54:00,563 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:54:00,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517918676] [2021-11-23 02:54:00,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517918676] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:54:00,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:54:00,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:54:00,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316030414] [2021-11-23 02:54:00,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:54:00,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:54:00,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:54:00,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:54:00,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:54:00,565 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) [2021-11-23 02:54:02,671 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:54:11,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:54:11,436 INFO L93 Difference]: Finished difference Result 7633 states and 10855 transitions. [2021-11-23 02:54:11,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:54:11,436 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 [2021-11-23 02:54:11,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:54:11,462 INFO L225 Difference]: With dead ends: 7633 [2021-11-23 02:54:11,462 INFO L226 Difference]: Without dead ends: 7629 [2021-11-23 02:54:11,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:54:11,468 INFO L933 BasicCegarLoop]: 3706 mSDtfsCounter, 4045 mSDsluCounter, 8210 mSDsCounter, 0 mSdLazyCounter, 1216 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4046 SdHoareTripleChecker+Valid, 11122 SdHoareTripleChecker+Invalid, 1219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1216 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:54:11,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4046 Valid, 11122 Invalid, 1219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1216 Invalid, 1 Unknown, 0 Unchecked, 10.2s Time] [2021-11-23 02:54:11,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7629 states. [2021-11-23 02:54:11,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7629 to 7627. [2021-11-23 02:54:11,913 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) [2021-11-23 02:54:11,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7627 states to 7627 states and 10849 transitions. [2021-11-23 02:54:11,944 INFO L78 Accepts]: Start accepts. Automaton has 7627 states and 10849 transitions. Word has length 121 [2021-11-23 02:54:11,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:54:11,945 INFO L470 AbstractCegarLoop]: Abstraction has 7627 states and 10849 transitions. [2021-11-23 02:54:11,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-23 02:54:11,945 INFO L276 IsEmpty]: Start isEmpty. Operand 7627 states and 10849 transitions. [2021-11-23 02:54:11,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-23 02:54:11,947 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:54:11,947 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:54:11,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-23 02:54:11,948 INFO L402 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)] === [2021-11-23 02:54:11,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:54:11,948 INFO L85 PathProgramCache]: Analyzing trace with hash -275005349, now seen corresponding path program 1 times [2021-11-23 02:54:11,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:54:11,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628485305] [2021-11-23 02:54:11,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:54:11,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:54:12,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:54:12,392 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 623 trivial. 0 not checked. [2021-11-23 02:54:12,393 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:54:12,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628485305] [2021-11-23 02:54:12,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628485305] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:54:12,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:54:12,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:54:12,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449947969] [2021-11-23 02:54:12,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:54:12,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:54:12,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:54:12,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:54:12,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:54:12,395 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) [2021-11-23 02:54:14,512 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:54:23,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:54:23,291 INFO L93 Difference]: Finished difference Result 7633 states and 10854 transitions. [2021-11-23 02:54:23,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:54:23,292 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 [2021-11-23 02:54:23,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:54:23,318 INFO L225 Difference]: With dead ends: 7633 [2021-11-23 02:54:23,318 INFO L226 Difference]: Without dead ends: 7429 [2021-11-23 02:54:23,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:54:23,324 INFO L933 BasicCegarLoop]: 3707 mSDtfsCounter, 4074 mSDsluCounter, 8178 mSDsCounter, 0 mSdLazyCounter, 1208 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4074 SdHoareTripleChecker+Valid, 11095 SdHoareTripleChecker+Invalid, 1210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1208 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:54:23,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4074 Valid, 11095 Invalid, 1210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1208 Invalid, 1 Unknown, 0 Unchecked, 10.3s Time] [2021-11-23 02:54:23,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7429 states. [2021-11-23 02:54:23,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7429 to 7429. [2021-11-23 02:54:23,889 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) [2021-11-23 02:54:23,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7429 states to 7429 states and 10640 transitions. [2021-11-23 02:54:23,930 INFO L78 Accepts]: Start accepts. Automaton has 7429 states and 10640 transitions. Word has length 125 [2021-11-23 02:54:23,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:54:23,930 INFO L470 AbstractCegarLoop]: Abstraction has 7429 states and 10640 transitions. [2021-11-23 02:54:23,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (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) [2021-11-23 02:54:23,930 INFO L276 IsEmpty]: Start isEmpty. Operand 7429 states and 10640 transitions. [2021-11-23 02:54:23,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-23 02:54:23,933 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:54:23,934 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:54:23,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-23 02:54:23,934 INFO L402 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)] === [2021-11-23 02:54:23,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:54:23,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1548611061, now seen corresponding path program 1 times [2021-11-23 02:54:23,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:54:23,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802869556] [2021-11-23 02:54:23,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:54:23,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:54:24,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:54:24,349 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-11-23 02:54:24,349 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:54:24,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802869556] [2021-11-23 02:54:24,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802869556] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:54:24,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:54:24,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:54:24,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231255983] [2021-11-23 02:54:24,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:54:24,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:54:24,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:54:24,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:54:24,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:54:24,351 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) [2021-11-23 02:54:26,458 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:54:35,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:54:35,981 INFO L93 Difference]: Finished difference Result 14852 states and 21281 transitions. [2021-11-23 02:54:35,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:54:35,982 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 [2021-11-23 02:54:35,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:54:36,018 INFO L225 Difference]: With dead ends: 14852 [2021-11-23 02:54:36,018 INFO L226 Difference]: Without dead ends: 7437 [2021-11-23 02:54:36,065 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:54:36,065 INFO L933 BasicCegarLoop]: 3660 mSDtfsCounter, 10 mSDsluCounter, 8092 mSDsCounter, 0 mSdLazyCounter, 1198 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 10964 SdHoareTripleChecker+Invalid, 1201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1198 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:54:36,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 10964 Invalid, 1201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1198 Invalid, 1 Unknown, 0 Unchecked, 11.0s Time] [2021-11-23 02:54:36,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7437 states. [2021-11-23 02:54:36,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7437 to 7433. [2021-11-23 02:54:36,657 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) [2021-11-23 02:54:36,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7433 states to 7433 states and 10644 transitions. [2021-11-23 02:54:36,698 INFO L78 Accepts]: Start accepts. Automaton has 7433 states and 10644 transitions. Word has length 150 [2021-11-23 02:54:36,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:54:36,699 INFO L470 AbstractCegarLoop]: Abstraction has 7433 states and 10644 transitions. [2021-11-23 02:54:36,699 INFO L471 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) [2021-11-23 02:54:36,699 INFO L276 IsEmpty]: Start isEmpty. Operand 7433 states and 10644 transitions. [2021-11-23 02:54:36,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-23 02:54:36,701 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:54:36,702 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:54:36,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-23 02:54:36,702 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:54:36,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:54:36,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1143424807, now seen corresponding path program 1 times [2021-11-23 02:54:36,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:54:36,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974954304] [2021-11-23 02:54:36,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:54:36,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:54:36,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:54:37,052 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-11-23 02:54:37,052 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:54:37,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974954304] [2021-11-23 02:54:37,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974954304] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:54:37,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:54:37,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:54:37,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706379766] [2021-11-23 02:54:37,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:54:37,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:54:37,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:54:37,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:54:37,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:54:37,054 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) [2021-11-23 02:54:39,167 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:54:45,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:54:45,188 INFO L93 Difference]: Finished difference Result 14717 states and 21243 transitions. [2021-11-23 02:54:45,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:54:45,188 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 [2021-11-23 02:54:45,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:54:45,218 INFO L225 Difference]: With dead ends: 14717 [2021-11-23 02:54:45,218 INFO L226 Difference]: Without dead ends: 7298 [2021-11-23 02:54:45,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:54:45,250 INFO L933 BasicCegarLoop]: 3663 mSDtfsCounter, 1 mSDsluCounter, 4055 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 7324 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:54:45,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 7324 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 794 Invalid, 1 Unknown, 0 Unchecked, 7.6s Time] [2021-11-23 02:54:45,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7298 states. [2021-11-23 02:54:45,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7298 to 7296. [2021-11-23 02:54:45,947 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) [2021-11-23 02:54:45,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7296 states to 7296 states and 10415 transitions. [2021-11-23 02:54:45,977 INFO L78 Accepts]: Start accepts. Automaton has 7296 states and 10415 transitions. Word has length 151 [2021-11-23 02:54:45,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:54:45,978 INFO L470 AbstractCegarLoop]: Abstraction has 7296 states and 10415 transitions. [2021-11-23 02:54:45,978 INFO L471 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) [2021-11-23 02:54:45,979 INFO L276 IsEmpty]: Start isEmpty. Operand 7296 states and 10415 transitions. [2021-11-23 02:54:45,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-23 02:54:45,982 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:54:45,982 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:54:45,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-23 02:54:45,982 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:54:45,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:54:45,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1627071244, now seen corresponding path program 1 times [2021-11-23 02:54:45,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:54:45,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569037032] [2021-11-23 02:54:45,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:54:45,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:54:46,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:54:46,311 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-11-23 02:54:46,311 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:54:46,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569037032] [2021-11-23 02:54:46,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569037032] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:54:46,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:54:46,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:54:46,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863438673] [2021-11-23 02:54:46,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:54:46,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:54:46,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:54:46,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:54:46,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:54:46,313 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) [2021-11-23 02:54:48,387 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:54:54,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:54:54,900 INFO L93 Difference]: Finished difference Result 14856 states and 21266 transitions. [2021-11-23 02:54:54,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:54:54,901 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 [2021-11-23 02:54:54,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:54:54,939 INFO L225 Difference]: With dead ends: 14856 [2021-11-23 02:54:54,939 INFO L226 Difference]: Without dead ends: 7574 [2021-11-23 02:54:54,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:54:54,968 INFO L933 BasicCegarLoop]: 3723 mSDtfsCounter, 242 mSDsluCounter, 3882 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 7232 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:54:54,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 7232 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 775 Invalid, 1 Unknown, 0 Unchecked, 7.9s Time] [2021-11-23 02:54:54,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7574 states. [2021-11-23 02:54:55,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7574 to 7304. [2021-11-23 02:54:55,680 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) [2021-11-23 02:54:55,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 10427 transitions. [2021-11-23 02:54:55,734 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 10427 transitions. Word has length 153 [2021-11-23 02:54:55,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:54:55,735 INFO L470 AbstractCegarLoop]: Abstraction has 7304 states and 10427 transitions. [2021-11-23 02:54:55,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (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) [2021-11-23 02:54:55,735 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 10427 transitions. [2021-11-23 02:54:55,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-23 02:54:55,740 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:54:55,740 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:54:55,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-23 02:54:55,740 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:54:55,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:54:55,741 INFO L85 PathProgramCache]: Analyzing trace with hash -350277027, now seen corresponding path program 1 times [2021-11-23 02:54:55,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:54:55,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620867259] [2021-11-23 02:54:55,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:54:55,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:54:55,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:54:56,155 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-11-23 02:54:56,155 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:54:56,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620867259] [2021-11-23 02:54:56,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620867259] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:54:56,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:54:56,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:54:56,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881325854] [2021-11-23 02:54:56,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:54:56,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:54:56,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:54:56,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:54:56,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:54:56,157 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) [2021-11-23 02:54:58,272 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:55:05,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:55:05,790 INFO L93 Difference]: Finished difference Result 14653 states and 20958 transitions. [2021-11-23 02:55:05,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:55:05,790 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 [2021-11-23 02:55:05,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:55:05,824 INFO L225 Difference]: With dead ends: 14653 [2021-11-23 02:55:05,825 INFO L226 Difference]: Without dead ends: 7363 [2021-11-23 02:55:05,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:55:05,856 INFO L933 BasicCegarLoop]: 3693 mSDtfsCounter, 26 mSDsluCounter, 4062 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 7363 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:55:05,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 7363 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 798 Invalid, 1 Unknown, 0 Unchecked, 8.9s Time] [2021-11-23 02:55:05,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7363 states. [2021-11-23 02:55:06,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7363 to 7306. [2021-11-23 02:55:06,473 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) [2021-11-23 02:55:06,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7306 states to 7306 states and 10429 transitions. [2021-11-23 02:55:06,512 INFO L78 Accepts]: Start accepts. Automaton has 7306 states and 10429 transitions. Word has length 154 [2021-11-23 02:55:06,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:55:06,513 INFO L470 AbstractCegarLoop]: Abstraction has 7306 states and 10429 transitions. [2021-11-23 02:55:06,513 INFO L471 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) [2021-11-23 02:55:06,513 INFO L276 IsEmpty]: Start isEmpty. Operand 7306 states and 10429 transitions. [2021-11-23 02:55:06,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-23 02:55:06,519 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:55:06,520 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:55:06,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-23 02:55:06,520 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-23 02:55:06,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:55:06,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1952695322, now seen corresponding path program 1 times [2021-11-23 02:55:06,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:55:06,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968055464] [2021-11-23 02:55:06,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:55:06,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:55:06,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:55:07,158 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-11-23 02:55:07,158 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:55:07,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968055464] [2021-11-23 02:55:07,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968055464] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:55:07,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:55:07,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:55:07,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057019533] [2021-11-23 02:55:07,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:55:07,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:55:07,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:55:07,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:55:07,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:55:07,161 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) [2021-11-23 02:55:09,297 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:55:19,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:55:19,048 INFO L93 Difference]: Finished difference Result 7326 states and 10447 transitions. [2021-11-23 02:55:19,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:55:19,048 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 [2021-11-23 02:55:19,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:55:19,073 INFO L225 Difference]: With dead ends: 7326 [2021-11-23 02:55:19,074 INFO L226 Difference]: Without dead ends: 7324 [2021-11-23 02:55:19,078 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:55:19,079 INFO L933 BasicCegarLoop]: 3664 mSDtfsCounter, 3973 mSDsluCounter, 8140 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3978 SdHoareTripleChecker+Valid, 11010 SdHoareTripleChecker+Invalid, 1205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:55:19,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3978 Valid, 11010 Invalid, 1205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1202 Invalid, 1 Unknown, 0 Unchecked, 11.3s Time] [2021-11-23 02:55:19,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7324 states. [2021-11-23 02:55:19,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7324 to 7322. [2021-11-23 02:55:19,540 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) [2021-11-23 02:55:19,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7322 states to 7322 states and 10441 transitions. [2021-11-23 02:55:19,573 INFO L78 Accepts]: Start accepts. Automaton has 7322 states and 10441 transitions. Word has length 155 [2021-11-23 02:55:19,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:55:19,574 INFO L470 AbstractCegarLoop]: Abstraction has 7322 states and 10441 transitions. [2021-11-23 02:55:19,574 INFO L471 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) [2021-11-23 02:55:19,575 INFO L276 IsEmpty]: Start isEmpty. Operand 7322 states and 10441 transitions. [2021-11-23 02:55:19,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-23 02:55:19,578 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:55:19,579 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:55:19,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-23 02:55:19,579 INFO L402 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)] === [2021-11-23 02:55:19,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:55:19,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1715475947, now seen corresponding path program 1 times [2021-11-23 02:55:19,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:55:19,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856198617] [2021-11-23 02:55:19,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:55:19,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:55:19,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:55:19,970 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-11-23 02:55:19,971 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:55:19,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856198617] [2021-11-23 02:55:19,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856198617] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:55:19,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363568979] [2021-11-23 02:55:19,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:55:19,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:55:19,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0147f0a-b748-46cf-8a2e-c07184fa343b/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:55:19,980 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0147f0a-b748-46cf-8a2e-c07184fa343b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:55:20,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0147f0a-b748-46cf-8a2e-c07184fa343b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:55:21,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:55:21,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 3777 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:55:21,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:55:22,075 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-11-23 02:55:22,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:55:22,494 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-11-23 02:55:22,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363568979] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:55:22,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [593595578] [2021-11-23 02:55:22,527 INFO L159 IcfgInterpreter]: Started Sifa with 104 locations of interest [2021-11-23 02:55:22,527 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:55:22,532 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:55:22,539 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:55:22,540 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:55:32,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:32,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:32,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:32,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:32,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:32,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:32,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:32,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:32,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:33,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:33,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:33,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:33,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:33,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:33,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:33,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:33,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:33,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:33,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:33,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:33,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:33,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:33,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:33,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:33,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:33,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:33,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:33,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:33,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:33,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:33,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:33,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:33,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:33,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:33,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:33,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:33,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:33,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:33,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:33,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:33,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:33,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:33,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:33,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:33,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:33,217 INFO L244 Elim1Store]: Index analysis took 299 ms [2021-11-23 02:57:10,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 45 select indices, 45 select index equivalence classes, 1035 disjoint index pairs (out of 990 index pairs), introduced 45 new quantified variables, introduced 0 case distinctions, treesize of input 4769 treesize of output 4097 [2021-11-23 02:58:49,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:58:50,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:58:51,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:58:52,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:58:53,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:58:54,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:58:55,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:58:56,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:58:58,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:58:59,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:59:00,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:59:01,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:59:02,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:59:03,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:59:04,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:59:05,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:59:06,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:59:08,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:59:09,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:59:10,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:59:11,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:59:12,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:59:13,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:59:14,767 INFO L190 IndexEqualityManager]: detected not equals via solver