./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-8390-axnet_cs.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26244769-1da9-4641-ae9b-1d9e01d14a37/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26244769-1da9-4641-ae9b-1d9e01d14a37/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26244769-1da9-4641-ae9b-1d9e01d14a37/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26244769-1da9-4641-ae9b-1d9e01d14a37/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-8390-axnet_cs.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26244769-1da9-4641-ae9b-1d9e01d14a37/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26244769-1da9-4641-ae9b-1d9e01d14a37/bin/utaipan-7li7fVZpFI --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 6b81be647295ba0700d02fa1d093d31284b02ba80deefc4d677fbd988693200b --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:39:31,304 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:39:31,306 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:39:31,336 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:39:31,336 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:39:31,337 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:39:31,338 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:39:31,340 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:39:31,342 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:39:31,343 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:39:31,344 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:39:31,345 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:39:31,345 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:39:31,346 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:39:31,347 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:39:31,349 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:39:31,350 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:39:31,351 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:39:31,352 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:39:31,354 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:39:31,356 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:39:31,357 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:39:31,358 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:39:31,359 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:39:31,363 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:39:31,363 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:39:31,363 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:39:31,364 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:39:31,365 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:39:31,366 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:39:31,366 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:39:31,367 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:39:31,368 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:39:31,369 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:39:31,370 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:39:31,370 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:39:31,371 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:39:31,371 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:39:31,371 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:39:31,372 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:39:31,373 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:39:31,374 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26244769-1da9-4641-ae9b-1d9e01d14a37/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 02:39:31,396 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:39:31,397 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:39:31,397 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:39:31,397 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:39:31,398 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:39:31,398 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:39:31,398 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:39:31,399 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:39:31,399 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:39:31,399 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:39:31,399 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:39:31,400 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:39:31,400 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:39:31,400 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:39:31,400 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:39:31,400 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:39:31,401 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:39:31,401 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:39:31,401 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:39:31,402 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:39:31,402 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:39:31,402 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:39:31,402 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:39:31,402 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:39:31,402 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:39:31,403 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:39:31,403 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:39:31,403 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:39:31,403 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:39:31,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:39:31,404 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:39:31,404 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:39:31,405 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:39:31,405 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:39:31,405 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:39:31,405 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:39:31,405 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:39:31,406 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:39:31,406 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26244769-1da9-4641-ae9b-1d9e01d14a37/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26244769-1da9-4641-ae9b-1d9e01d14a37/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b81be647295ba0700d02fa1d093d31284b02ba80deefc4d677fbd988693200b [2022-11-03 02:39:31,679 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:39:31,701 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:39:31,703 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:39:31,705 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:39:31,705 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:39:31,715 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26244769-1da9-4641-ae9b-1d9e01d14a37/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-8390-axnet_cs.cil.i [2022-11-03 02:39:31,796 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26244769-1da9-4641-ae9b-1d9e01d14a37/bin/utaipan-7li7fVZpFI/data/5d907960e/48e177265c1b4732b9132403f24cadd0/FLAGe038f395c [2022-11-03 02:39:32,754 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:39:32,755 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26244769-1da9-4641-ae9b-1d9e01d14a37/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-8390-axnet_cs.cil.i [2022-11-03 02:39:32,806 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26244769-1da9-4641-ae9b-1d9e01d14a37/bin/utaipan-7li7fVZpFI/data/5d907960e/48e177265c1b4732b9132403f24cadd0/FLAGe038f395c [2022-11-03 02:39:33,216 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26244769-1da9-4641-ae9b-1d9e01d14a37/bin/utaipan-7li7fVZpFI/data/5d907960e/48e177265c1b4732b9132403f24cadd0 [2022-11-03 02:39:33,218 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:39:33,220 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:39:33,221 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:39:33,221 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:39:33,225 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:39:33,226 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:39:33" (1/1) ... [2022-11-03 02:39:33,227 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d597300 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:33, skipping insertion in model container [2022-11-03 02:39:33,227 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:39:33" (1/1) ... [2022-11-03 02:39:33,234 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:39:33,387 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:39:36,320 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_26244769-1da9-4641-ae9b-1d9e01d14a37/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-8390-axnet_cs.cil.i[315060,315073] [2022-11-03 02:39:36,325 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_26244769-1da9-4641-ae9b-1d9e01d14a37/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-8390-axnet_cs.cil.i[315229,315242] [2022-11-03 02:39:36,325 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_26244769-1da9-4641-ae9b-1d9e01d14a37/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-8390-axnet_cs.cil.i[315396,315409] [2022-11-03 02:39:36,326 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_26244769-1da9-4641-ae9b-1d9e01d14a37/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-8390-axnet_cs.cil.i[315564,315577] [2022-11-03 02:39:36,360 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:39:36,431 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:39:36,850 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_26244769-1da9-4641-ae9b-1d9e01d14a37/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-8390-axnet_cs.cil.i[315060,315073] [2022-11-03 02:39:36,850 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_26244769-1da9-4641-ae9b-1d9e01d14a37/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-8390-axnet_cs.cil.i[315229,315242] [2022-11-03 02:39:36,851 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_26244769-1da9-4641-ae9b-1d9e01d14a37/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-8390-axnet_cs.cil.i[315396,315409] [2022-11-03 02:39:36,851 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_26244769-1da9-4641-ae9b-1d9e01d14a37/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-8390-axnet_cs.cil.i[315564,315577] [2022-11-03 02:39:36,860 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:39:37,039 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:39:37,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:37 WrapperNode [2022-11-03 02:39:37,041 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:39:37,042 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:39:37,042 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:39:37,042 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:39:37,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:37" (1/1) ... [2022-11-03 02:39:37,150 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:37" (1/1) ... [2022-11-03 02:39:37,289 INFO L138 Inliner]: procedures = 370, calls = 2171, calls flagged for inlining = 172, calls inlined = 152, statements flattened = 4070 [2022-11-03 02:39:37,290 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:39:37,290 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:39:37,290 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:39:37,290 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:39:37,300 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:37" (1/1) ... [2022-11-03 02:39:37,301 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:37" (1/1) ... [2022-11-03 02:39:37,327 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:37" (1/1) ... [2022-11-03 02:39:37,328 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:37" (1/1) ... [2022-11-03 02:39:37,493 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:37" (1/1) ... [2022-11-03 02:39:37,519 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:37" (1/1) ... [2022-11-03 02:39:37,545 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:37" (1/1) ... [2022-11-03 02:39:37,567 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:37" (1/1) ... [2022-11-03 02:39:37,598 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:39:37,600 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:39:37,600 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:39:37,600 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:39:37,601 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:37" (1/1) ... [2022-11-03 02:39:37,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:39:37,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26244769-1da9-4641-ae9b-1d9e01d14a37/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:39:37,631 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26244769-1da9-4641-ae9b-1d9e01d14a37/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:39:37,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26244769-1da9-4641-ae9b-1d9e01d14a37/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:39:37,695 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_page_lock_of_ei_device [2022-11-03 02:39:37,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_page_lock_of_ei_device [2022-11-03 02:39:37,696 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-03 02:39:37,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-03 02:39:37,696 INFO L130 BoogieDeclarations]: Found specification of procedure axnet_detach [2022-11-03 02:39:37,696 INFO L138 BoogieDeclarations]: Found implementation of procedure axnet_detach [2022-11-03 02:39:37,696 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-03 02:39:37,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-03 02:39:37,696 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2022-11-03 02:39:37,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2022-11-03 02:39:37,697 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2022-11-03 02:39:37,697 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2022-11-03 02:39:37,697 INFO L130 BoogieDeclarations]: Found specification of procedure AX88190_init [2022-11-03 02:39:37,697 INFO L138 BoogieDeclarations]: Found implementation of procedure AX88190_init [2022-11-03 02:39:37,697 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~$Pointer$~X~int~TO~VOID [2022-11-03 02:39:37,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~$Pointer$~X~int~TO~VOID [2022-11-03 02:39:37,698 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-03 02:39:37,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-03 02:39:37,698 INFO L130 BoogieDeclarations]: Found specification of procedure slow_down_io [2022-11-03 02:39:37,698 INFO L138 BoogieDeclarations]: Found implementation of procedure slow_down_io [2022-11-03 02:39:37,698 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_process_context [2022-11-03 02:39:37,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_process_context [2022-11-03 02:39:37,698 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_70 [2022-11-03 02:39:37,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_70 [2022-11-03 02:39:37,699 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2022-11-03 02:39:37,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2022-11-03 02:39:37,699 INFO L130 BoogieDeclarations]: Found specification of procedure ei_receive [2022-11-03 02:39:37,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ei_receive [2022-11-03 02:39:37,699 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-03 02:39:37,699 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-03 02:39:37,700 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_EMGentry_exit_axnet_cs_driver_exit_14_2 [2022-11-03 02:39:37,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_EMGentry_exit_axnet_cs_driver_exit_14_2 [2022-11-03 02:39:37,700 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2022-11-03 02:39:37,700 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2022-11-03 02:39:37,700 INFO L130 BoogieDeclarations]: Found specification of procedure axnet_release [2022-11-03 02:39:37,700 INFO L138 BoogieDeclarations]: Found implementation of procedure axnet_release [2022-11-03 02:39:37,701 INFO L130 BoogieDeclarations]: Found specification of procedure pcmcia_write_config_byte [2022-11-03 02:39:37,701 INFO L138 BoogieDeclarations]: Found implementation of procedure pcmcia_write_config_byte [2022-11-03 02:39:37,701 INFO L130 BoogieDeclarations]: Found specification of procedure insw [2022-11-03 02:39:37,701 INFO L138 BoogieDeclarations]: Found implementation of procedure insw [2022-11-03 02:39:37,702 INFO L130 BoogieDeclarations]: Found specification of procedure PRIV [2022-11-03 02:39:37,702 INFO L138 BoogieDeclarations]: Found implementation of procedure PRIV [2022-11-03 02:39:37,702 INFO L130 BoogieDeclarations]: Found specification of procedure netif_start_queue [2022-11-03 02:39:37,703 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_start_queue [2022-11-03 02:39:37,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:39:37,703 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2022-11-03 02:39:37,704 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2022-11-03 02:39:37,704 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 02:39:37,705 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2022-11-03 02:39:37,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2022-11-03 02:39:37,705 INFO L130 BoogieDeclarations]: Found specification of procedure add_timer [2022-11-03 02:39:37,705 INFO L138 BoogieDeclarations]: Found implementation of procedure add_timer [2022-11-03 02:39:37,705 INFO L130 BoogieDeclarations]: Found specification of procedure set_multicast_list [2022-11-03 02:39:37,706 INFO L138 BoogieDeclarations]: Found implementation of procedure set_multicast_list [2022-11-03 02:39:37,706 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2022-11-03 02:39:37,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2022-11-03 02:39:37,706 INFO L130 BoogieDeclarations]: Found specification of procedure NS8390_trigger_send [2022-11-03 02:39:37,707 INFO L138 BoogieDeclarations]: Found implementation of procedure NS8390_trigger_send [2022-11-03 02:39:37,707 INFO L130 BoogieDeclarations]: Found specification of procedure ei_tx_intr [2022-11-03 02:39:37,707 INFO L138 BoogieDeclarations]: Found implementation of procedure ei_tx_intr [2022-11-03 02:39:37,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:39:37,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 02:39:37,707 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-11-03 02:39:37,708 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-11-03 02:39:37,708 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2022-11-03 02:39:37,709 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2022-11-03 02:39:37,709 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-11-03 02:39:37,709 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-11-03 02:39:37,709 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2022-11-03 02:39:37,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2022-11-03 02:39:37,710 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-03 02:39:37,710 INFO L130 BoogieDeclarations]: Found specification of procedure mdio_sync [2022-11-03 02:39:37,710 INFO L138 BoogieDeclarations]: Found implementation of procedure mdio_sync [2022-11-03 02:39:37,710 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-03 02:39:37,710 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2022-11-03 02:39:37,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2022-11-03 02:39:37,711 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 02:39:37,711 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2022-11-03 02:39:37,711 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2022-11-03 02:39:37,712 INFO L130 BoogieDeclarations]: Found specification of procedure ei_irq_wrapper [2022-11-03 02:39:37,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ei_irq_wrapper [2022-11-03 02:39:37,712 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_interrupt_context [2022-11-03 02:39:37,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_interrupt_context [2022-11-03 02:39:37,712 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2022-11-03 02:39:37,712 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2022-11-03 02:39:37,713 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_err_code [2022-11-03 02:39:37,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_err_code [2022-11-03 02:39:37,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 02:39:37,713 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-03 02:39:37,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-03 02:39:37,713 INFO L130 BoogieDeclarations]: Found specification of procedure axnet_reset_8390 [2022-11-03 02:39:37,714 INFO L138 BoogieDeclarations]: Found implementation of procedure axnet_reset_8390 [2022-11-03 02:39:37,714 INFO L130 BoogieDeclarations]: Found specification of procedure axnet_tx_timeout [2022-11-03 02:39:37,714 INFO L138 BoogieDeclarations]: Found implementation of procedure axnet_tx_timeout [2022-11-03 02:39:37,714 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2022-11-03 02:39:37,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2022-11-03 02:39:37,714 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:39:37,715 INFO L130 BoogieDeclarations]: Found specification of procedure inb_p [2022-11-03 02:39:37,715 INFO L138 BoogieDeclarations]: Found implementation of procedure inb_p [2022-11-03 02:39:37,715 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_1 [2022-11-03 02:39:37,715 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_1 [2022-11-03 02:39:37,715 INFO L130 BoogieDeclarations]: Found specification of procedure axnet_cs_driver_exit [2022-11-03 02:39:37,715 INFO L138 BoogieDeclarations]: Found implementation of procedure axnet_cs_driver_exit [2022-11-03 02:39:37,716 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:39:37,716 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2022-11-03 02:39:37,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2022-11-03 02:39:37,716 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2022-11-03 02:39:37,716 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2022-11-03 02:39:37,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 02:39:37,717 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2022-11-03 02:39:37,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2022-11-03 02:39:37,717 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2022-11-03 02:39:37,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2022-11-03 02:39:37,717 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_spin_lock [2022-11-03 02:39:37,722 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_spin_lock [2022-11-03 02:39:37,722 INFO L130 BoogieDeclarations]: Found specification of procedure outb_p [2022-11-03 02:39:37,722 INFO L138 BoogieDeclarations]: Found implementation of procedure outb_p [2022-11-03 02:39:37,723 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2022-11-03 02:39:37,723 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2022-11-03 02:39:37,723 INFO L130 BoogieDeclarations]: Found specification of procedure do_set_multicast_list [2022-11-03 02:39:37,723 INFO L138 BoogieDeclarations]: Found implementation of procedure do_set_multicast_list [2022-11-03 02:39:37,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:39:37,723 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2022-11-03 02:39:37,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2022-11-03 02:39:37,724 INFO L130 BoogieDeclarations]: Found specification of procedure mdio_read [2022-11-03 02:39:37,724 INFO L138 BoogieDeclarations]: Found implementation of procedure mdio_read [2022-11-03 02:39:37,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:39:37,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:39:38,335 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:39:38,338 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:39:38,730 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-03 02:39:44,823 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2022-11-03 02:39:44,944 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:39:45,760 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:39:45,760 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:39:45,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:39:45 BoogieIcfgContainer [2022-11-03 02:39:45,765 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:39:45,768 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:39:45,768 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:39:45,771 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:39:45,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:39:33" (1/3) ... [2022-11-03 02:39:45,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59c48ec6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:39:45, skipping insertion in model container [2022-11-03 02:39:45,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:37" (2/3) ... [2022-11-03 02:39:45,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59c48ec6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:39:45, skipping insertion in model container [2022-11-03 02:39:45,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:39:45" (3/3) ... [2022-11-03 02:39:45,774 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-8390-axnet_cs.cil.i [2022-11-03 02:39:45,795 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:39:45,796 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-11-03 02:39:45,873 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:39:45,880 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2ad0a17b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:39:45,880 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-03 02:39:45,887 INFO L276 IsEmpty]: Start isEmpty. Operand has 953 states, 528 states have (on average 1.303030303030303) internal successors, (688), 552 states have internal predecessors, (688), 368 states have call successors, (368), 56 states have call predecessors, (368), 55 states have return successors, (362), 354 states have call predecessors, (362), 362 states have call successors, (362) [2022-11-03 02:39:45,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-03 02:39:45,903 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:45,903 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:45,904 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 02:39:45,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:45,909 INFO L85 PathProgramCache]: Analyzing trace with hash 263466716, now seen corresponding path program 1 times [2022-11-03 02:39:45,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:39:45,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330990608] [2022-11-03 02:39:45,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:45,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:39:46,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:46,820 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-11-03 02:39:46,820 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:39:46,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330990608] [2022-11-03 02:39:46,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330990608] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:46,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:39:46,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:39:46,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414830117] [2022-11-03 02:39:46,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:46,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:39:46,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:39:46,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:39:46,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:39:46,862 INFO L87 Difference]: Start difference. First operand has 953 states, 528 states have (on average 1.303030303030303) internal successors, (688), 552 states have internal predecessors, (688), 368 states have call successors, (368), 56 states have call predecessors, (368), 55 states have return successors, (362), 354 states have call predecessors, (362), 362 states have call successors, (362) Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:39:50,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:39:50,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:50,878 INFO L93 Difference]: Finished difference Result 2749 states and 4166 transitions. [2022-11-03 02:39:50,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:39:50,881 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 91 [2022-11-03 02:39:50,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:50,915 INFO L225 Difference]: With dead ends: 2749 [2022-11-03 02:39:50,916 INFO L226 Difference]: Without dead ends: 1801 [2022-11-03 02:39:50,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:39:50,935 INFO L413 NwaCegarLoop]: 1547 mSDtfsCounter, 1301 mSDsluCounter, 1361 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1301 SdHoareTripleChecker+Valid, 2732 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:50,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1301 Valid, 2732 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-03 02:39:50,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1801 states. [2022-11-03 02:39:51,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1801 to 1797. [2022-11-03 02:39:51,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1797 states, 1005 states have (on average 1.2935323383084578) internal successors, (1300), 1050 states have internal predecessors, (1300), 683 states have call successors, (683), 107 states have call predecessors, (683), 106 states have return successors, (679), 663 states have call predecessors, (679), 679 states have call successors, (679) [2022-11-03 02:39:51,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1797 states to 1797 states and 2662 transitions. [2022-11-03 02:39:51,297 INFO L78 Accepts]: Start accepts. Automaton has 1797 states and 2662 transitions. Word has length 91 [2022-11-03 02:39:51,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:51,298 INFO L495 AbstractCegarLoop]: Abstraction has 1797 states and 2662 transitions. [2022-11-03 02:39:51,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:39:51,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1797 states and 2662 transitions. [2022-11-03 02:39:51,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-03 02:39:51,313 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:51,313 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:51,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:39:51,314 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 02:39:51,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:51,315 INFO L85 PathProgramCache]: Analyzing trace with hash -228041881, now seen corresponding path program 1 times [2022-11-03 02:39:51,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:39:51,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212780314] [2022-11-03 02:39:51,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:51,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:39:51,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:51,820 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-11-03 02:39:51,820 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:39:51,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212780314] [2022-11-03 02:39:51,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212780314] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:51,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:39:51,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:39:51,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940933503] [2022-11-03 02:39:51,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:51,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:39:51,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:39:51,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:39:51,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:39:51,830 INFO L87 Difference]: Start difference. First operand 1797 states and 2662 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:39:53,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:39:55,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:55,125 INFO L93 Difference]: Finished difference Result 5055 states and 7458 transitions. [2022-11-03 02:39:55,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:39:55,126 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 99 [2022-11-03 02:39:55,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:55,153 INFO L225 Difference]: With dead ends: 5055 [2022-11-03 02:39:55,154 INFO L226 Difference]: Without dead ends: 3273 [2022-11-03 02:39:55,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:39:55,167 INFO L413 NwaCegarLoop]: 1544 mSDtfsCounter, 1115 mSDsluCounter, 1342 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1115 SdHoareTripleChecker+Valid, 2720 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:55,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1115 Valid, 2720 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-03 02:39:55,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3273 states. [2022-11-03 02:39:55,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3273 to 3242. [2022-11-03 02:39:55,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3242 states, 1810 states have (on average 1.2834254143646409) internal successors, (2323), 1892 states have internal predecessors, (2323), 1222 states have call successors, (1222), 206 states have call predecessors, (1222), 207 states have return successors, (1224), 1189 states have call predecessors, (1224), 1218 states have call successors, (1224) [2022-11-03 02:39:55,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3242 states to 3242 states and 4769 transitions. [2022-11-03 02:39:55,484 INFO L78 Accepts]: Start accepts. Automaton has 3242 states and 4769 transitions. Word has length 99 [2022-11-03 02:39:55,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:55,486 INFO L495 AbstractCegarLoop]: Abstraction has 3242 states and 4769 transitions. [2022-11-03 02:39:55,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:39:55,487 INFO L276 IsEmpty]: Start isEmpty. Operand 3242 states and 4769 transitions. [2022-11-03 02:39:55,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-03 02:39:55,495 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:55,495 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 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] [2022-11-03 02:39:55,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:39:55,496 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 02:39:55,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:55,497 INFO L85 PathProgramCache]: Analyzing trace with hash -864064538, now seen corresponding path program 1 times [2022-11-03 02:39:55,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:39:55,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176354271] [2022-11-03 02:39:55,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:55,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:39:55,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:55,887 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-11-03 02:39:55,887 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:39:55,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176354271] [2022-11-03 02:39:55,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176354271] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:55,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:39:55,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:39:55,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916407871] [2022-11-03 02:39:55,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:55,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:39:55,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:39:55,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:39:55,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:39:55,890 INFO L87 Difference]: Start difference. First operand 3242 states and 4769 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 02:39:57,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:39:58,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:58,732 INFO L93 Difference]: Finished difference Result 8940 states and 13097 transitions. [2022-11-03 02:39:58,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:39:58,733 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 103 [2022-11-03 02:39:58,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:58,768 INFO L225 Difference]: With dead ends: 8940 [2022-11-03 02:39:58,768 INFO L226 Difference]: Without dead ends: 5713 [2022-11-03 02:39:58,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:39:58,785 INFO L413 NwaCegarLoop]: 1502 mSDtfsCounter, 1114 mSDsluCounter, 1356 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1114 SdHoareTripleChecker+Valid, 2684 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:58,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1114 Valid, 2684 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 02:39:58,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5713 states. [2022-11-03 02:39:59,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5713 to 5680. [2022-11-03 02:39:59,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5680 states, 3184 states have (on average 1.2792085427135678) internal successors, (4073), 3322 states have internal predecessors, (4073), 2108 states have call successors, (2108), 388 states have call predecessors, (2108), 385 states have return successors, (2116), 2035 states have call predecessors, (2116), 2104 states have call successors, (2116) [2022-11-03 02:39:59,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5680 states to 5680 states and 8297 transitions. [2022-11-03 02:39:59,300 INFO L78 Accepts]: Start accepts. Automaton has 5680 states and 8297 transitions. Word has length 103 [2022-11-03 02:39:59,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:59,302 INFO L495 AbstractCegarLoop]: Abstraction has 5680 states and 8297 transitions. [2022-11-03 02:39:59,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 02:39:59,302 INFO L276 IsEmpty]: Start isEmpty. Operand 5680 states and 8297 transitions. [2022-11-03 02:39:59,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-03 02:39:59,316 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:59,317 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:59,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:39:59,317 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 02:39:59,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:59,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1590383950, now seen corresponding path program 1 times [2022-11-03 02:39:59,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:39:59,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178779310] [2022-11-03 02:39:59,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:59,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:39:59,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:59,792 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2022-11-03 02:39:59,792 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:39:59,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178779310] [2022-11-03 02:39:59,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178779310] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:59,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:39:59,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:39:59,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074916542] [2022-11-03 02:39:59,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:59,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:39:59,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:39:59,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:39:59,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:39:59,797 INFO L87 Difference]: Start difference. First operand 5680 states and 8297 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 02:40:02,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:02,043 INFO L93 Difference]: Finished difference Result 10086 states and 14720 transitions. [2022-11-03 02:40:02,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:40:02,043 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 118 [2022-11-03 02:40:02,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:02,078 INFO L225 Difference]: With dead ends: 10086 [2022-11-03 02:40:02,079 INFO L226 Difference]: Without dead ends: 4421 [2022-11-03 02:40:02,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:40:02,114 INFO L413 NwaCegarLoop]: 1650 mSDtfsCounter, 1260 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1260 SdHoareTripleChecker+Valid, 2276 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:02,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1260 Valid, 2276 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 02:40:02,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4421 states. [2022-11-03 02:40:02,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4421 to 4382. [2022-11-03 02:40:02,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4382 states, 2512 states have (on average 1.273487261146497) internal successors, (3199), 2656 states have internal predecessors, (3199), 1551 states have call successors, (1551), 355 states have call predecessors, (1551), 316 states have return successors, (1583), 1405 states have call predecessors, (1583), 1547 states have call successors, (1583) [2022-11-03 02:40:02,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4382 states to 4382 states and 6333 transitions. [2022-11-03 02:40:02,535 INFO L78 Accepts]: Start accepts. Automaton has 4382 states and 6333 transitions. Word has length 118 [2022-11-03 02:40:02,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:02,535 INFO L495 AbstractCegarLoop]: Abstraction has 4382 states and 6333 transitions. [2022-11-03 02:40:02,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 02:40:02,537 INFO L276 IsEmpty]: Start isEmpty. Operand 4382 states and 6333 transitions. [2022-11-03 02:40:02,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-11-03 02:40:02,539 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:02,540 INFO L195 NwaCegarLoop]: trace histogram [11, 7, 7, 7, 7, 7, 7, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:40:02,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:40:02,541 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 02:40:02,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:02,541 INFO L85 PathProgramCache]: Analyzing trace with hash 925306983, now seen corresponding path program 1 times [2022-11-03 02:40:02,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:40:02,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413294332] [2022-11-03 02:40:02,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:02,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:40:02,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:03,216 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2022-11-03 02:40:03,217 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:40:03,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413294332] [2022-11-03 02:40:03,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413294332] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:40:03,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:40:03,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:40:03,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337340487] [2022-11-03 02:40:03,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:40:03,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:40:03,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:40:03,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:40:03,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:40:03,220 INFO L87 Difference]: Start difference. First operand 4382 states and 6333 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 02:40:06,452 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:40:06,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:06,842 INFO L93 Difference]: Finished difference Result 4388 states and 6338 transitions. [2022-11-03 02:40:06,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:40:06,843 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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 133 [2022-11-03 02:40:06,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:06,871 INFO L225 Difference]: With dead ends: 4388 [2022-11-03 02:40:06,871 INFO L226 Difference]: Without dead ends: 4386 [2022-11-03 02:40:06,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:40:06,876 INFO L413 NwaCegarLoop]: 1198 mSDtfsCounter, 1344 mSDsluCounter, 2755 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1355 SdHoareTripleChecker+Valid, 3581 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:06,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1355 Valid, 3581 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-03 02:40:06,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4386 states. [2022-11-03 02:40:07,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4386 to 4386. [2022-11-03 02:40:07,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4386 states, 2515 states have (on average 1.2731610337972168) internal successors, (3202), 2659 states have internal predecessors, (3202), 1551 states have call successors, (1551), 356 states have call predecessors, (1551), 317 states have return successors, (1583), 1405 states have call predecessors, (1583), 1547 states have call successors, (1583) [2022-11-03 02:40:07,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4386 states to 4386 states and 6336 transitions. [2022-11-03 02:40:07,311 INFO L78 Accepts]: Start accepts. Automaton has 4386 states and 6336 transitions. Word has length 133 [2022-11-03 02:40:07,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:07,314 INFO L495 AbstractCegarLoop]: Abstraction has 4386 states and 6336 transitions. [2022-11-03 02:40:07,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 02:40:07,314 INFO L276 IsEmpty]: Start isEmpty. Operand 4386 states and 6336 transitions. [2022-11-03 02:40:07,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-11-03 02:40:07,318 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:07,318 INFO L195 NwaCegarLoop]: trace histogram [11, 7, 7, 7, 7, 7, 7, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:40:07,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 02:40:07,319 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 02:40:07,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:07,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1451358043, now seen corresponding path program 1 times [2022-11-03 02:40:07,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:40:07,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272035854] [2022-11-03 02:40:07,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:07,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:40:07,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:07,900 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2022-11-03 02:40:07,900 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:40:07,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272035854] [2022-11-03 02:40:07,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272035854] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:40:07,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:40:07,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:40:07,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973326472] [2022-11-03 02:40:07,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:40:07,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:40:07,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:40:07,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:40:07,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:40:07,903 INFO L87 Difference]: Start difference. First operand 4386 states and 6336 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, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:40:11,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:40:12,018 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:40:12,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:12,580 INFO L93 Difference]: Finished difference Result 4392 states and 6341 transitions. [2022-11-03 02:40:12,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:40:12,581 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, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 138 [2022-11-03 02:40:12,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:12,605 INFO L225 Difference]: With dead ends: 4392 [2022-11-03 02:40:12,605 INFO L226 Difference]: Without dead ends: 4390 [2022-11-03 02:40:12,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:40:12,609 INFO L413 NwaCegarLoop]: 1201 mSDtfsCounter, 1339 mSDsluCounter, 2755 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1349 SdHoareTripleChecker+Valid, 3584 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:12,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1349 Valid, 3584 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-11-03 02:40:12,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4390 states. [2022-11-03 02:40:12,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4390 to 4390. [2022-11-03 02:40:12,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4390 states, 2518 states have (on average 1.272835583796664) internal successors, (3205), 2662 states have internal predecessors, (3205), 1551 states have call successors, (1551), 357 states have call predecessors, (1551), 318 states have return successors, (1583), 1405 states have call predecessors, (1583), 1547 states have call successors, (1583) [2022-11-03 02:40:12,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4390 states to 4390 states and 6339 transitions. [2022-11-03 02:40:12,951 INFO L78 Accepts]: Start accepts. Automaton has 4390 states and 6339 transitions. Word has length 138 [2022-11-03 02:40:12,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:12,952 INFO L495 AbstractCegarLoop]: Abstraction has 4390 states and 6339 transitions. [2022-11-03 02:40:12,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:40:12,952 INFO L276 IsEmpty]: Start isEmpty. Operand 4390 states and 6339 transitions. [2022-11-03 02:40:12,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-03 02:40:12,956 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:12,956 INFO L195 NwaCegarLoop]: trace histogram [11, 7, 7, 7, 7, 7, 7, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:40:12,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 02:40:12,957 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 02:40:12,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:12,957 INFO L85 PathProgramCache]: Analyzing trace with hash -659841305, now seen corresponding path program 1 times [2022-11-03 02:40:12,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:40:12,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724123272] [2022-11-03 02:40:12,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:12,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:40:13,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:13,576 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2022-11-03 02:40:13,577 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:40:13,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724123272] [2022-11-03 02:40:13,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724123272] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:40:13,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:40:13,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:40:13,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481688973] [2022-11-03 02:40:13,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:40:13,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:40:13,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:40:13,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:40:13,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:40:13,580 INFO L87 Difference]: Start difference. First operand 4390 states and 6339 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, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-03 02:40:18,230 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:40:18,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:18,661 INFO L93 Difference]: Finished difference Result 4396 states and 6344 transitions. [2022-11-03 02:40:18,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:40:18,662 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, (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 143 [2022-11-03 02:40:18,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:18,702 INFO L225 Difference]: With dead ends: 4396 [2022-11-03 02:40:18,708 INFO L226 Difference]: Without dead ends: 4394 [2022-11-03 02:40:18,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:40:18,713 INFO L413 NwaCegarLoop]: 1201 mSDtfsCounter, 1339 mSDsluCounter, 2755 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1348 SdHoareTripleChecker+Valid, 3584 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:18,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1348 Valid, 3584 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 576 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2022-11-03 02:40:18,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4394 states. [2022-11-03 02:40:19,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4394 to 4394. [2022-11-03 02:40:19,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4394 states, 2521 states have (on average 1.2725109083696946) internal successors, (3208), 2665 states have internal predecessors, (3208), 1551 states have call successors, (1551), 358 states have call predecessors, (1551), 319 states have return successors, (1583), 1405 states have call predecessors, (1583), 1547 states have call successors, (1583) [2022-11-03 02:40:19,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4394 states to 4394 states and 6342 transitions. [2022-11-03 02:40:19,061 INFO L78 Accepts]: Start accepts. Automaton has 4394 states and 6342 transitions. Word has length 143 [2022-11-03 02:40:19,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:19,062 INFO L495 AbstractCegarLoop]: Abstraction has 4394 states and 6342 transitions. [2022-11-03 02:40:19,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-03 02:40:19,063 INFO L276 IsEmpty]: Start isEmpty. Operand 4394 states and 6342 transitions. [2022-11-03 02:40:19,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-11-03 02:40:19,066 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:19,066 INFO L195 NwaCegarLoop]: trace histogram [11, 7, 7, 7, 7, 7, 7, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:40:19,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 02:40:19,066 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 02:40:19,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:19,067 INFO L85 PathProgramCache]: Analyzing trace with hash -2058831451, now seen corresponding path program 1 times [2022-11-03 02:40:19,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:40:19,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419676298] [2022-11-03 02:40:19,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:19,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:40:19,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:19,610 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2022-11-03 02:40:19,611 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:40:19,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419676298] [2022-11-03 02:40:19,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419676298] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:40:19,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:40:19,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:40:19,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193742695] [2022-11-03 02:40:19,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:40:19,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:40:19,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:40:19,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:40:19,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:40:19,613 INFO L87 Difference]: Start difference. First operand 4394 states and 6342 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, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-03 02:40:21,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:40:23,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:23,609 INFO L93 Difference]: Finished difference Result 4400 states and 6347 transitions. [2022-11-03 02:40:23,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:40:23,610 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, (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 148 [2022-11-03 02:40:23,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:23,647 INFO L225 Difference]: With dead ends: 4400 [2022-11-03 02:40:23,648 INFO L226 Difference]: Without dead ends: 4398 [2022-11-03 02:40:23,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:40:23,652 INFO L413 NwaCegarLoop]: 1201 mSDtfsCounter, 1339 mSDsluCounter, 2755 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1347 SdHoareTripleChecker+Valid, 3584 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:23,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1347 Valid, 3584 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-03 02:40:23,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4398 states. [2022-11-03 02:40:24,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4398 to 4398. [2022-11-03 02:40:24,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4398 states, 2524 states have (on average 1.2721870047543582) internal successors, (3211), 2668 states have internal predecessors, (3211), 1551 states have call successors, (1551), 359 states have call predecessors, (1551), 320 states have return successors, (1583), 1405 states have call predecessors, (1583), 1547 states have call successors, (1583) [2022-11-03 02:40:24,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4398 states to 4398 states and 6345 transitions. [2022-11-03 02:40:24,079 INFO L78 Accepts]: Start accepts. Automaton has 4398 states and 6345 transitions. Word has length 148 [2022-11-03 02:40:24,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:24,082 INFO L495 AbstractCegarLoop]: Abstraction has 4398 states and 6345 transitions. [2022-11-03 02:40:24,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-03 02:40:24,082 INFO L276 IsEmpty]: Start isEmpty. Operand 4398 states and 6345 transitions. [2022-11-03 02:40:24,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 02:40:24,085 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:24,086 INFO L195 NwaCegarLoop]: trace histogram [11, 7, 7, 7, 7, 7, 7, 5, 5, 5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:40:24,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 02:40:24,086 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 02:40:24,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:24,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1193218945, now seen corresponding path program 1 times [2022-11-03 02:40:24,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:40:24,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132382711] [2022-11-03 02:40:24,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:24,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:40:24,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:24,604 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2022-11-03 02:40:24,604 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:40:24,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132382711] [2022-11-03 02:40:24,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132382711] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:40:24,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:40:24,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:40:24,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449475274] [2022-11-03 02:40:24,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:40:24,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:40:24,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:40:24,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:40:24,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:40:24,608 INFO L87 Difference]: Start difference. First operand 4398 states and 6345 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-03 02:40:27,120 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:40:28,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:28,910 INFO L93 Difference]: Finished difference Result 4404 states and 6350 transitions. [2022-11-03 02:40:28,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:40:28,911 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (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 160 [2022-11-03 02:40:28,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:28,934 INFO L225 Difference]: With dead ends: 4404 [2022-11-03 02:40:28,934 INFO L226 Difference]: Without dead ends: 4402 [2022-11-03 02:40:28,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:40:28,941 INFO L413 NwaCegarLoop]: 1201 mSDtfsCounter, 1338 mSDsluCounter, 2755 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1345 SdHoareTripleChecker+Valid, 3584 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:28,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1345 Valid, 3584 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-11-03 02:40:28,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4402 states. [2022-11-03 02:40:29,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4402 to 4402. [2022-11-03 02:40:29,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4402 states, 2527 states have (on average 1.2718638702018203) internal successors, (3214), 2671 states have internal predecessors, (3214), 1551 states have call successors, (1551), 360 states have call predecessors, (1551), 321 states have return successors, (1583), 1405 states have call predecessors, (1583), 1547 states have call successors, (1583) [2022-11-03 02:40:29,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4402 states to 4402 states and 6348 transitions. [2022-11-03 02:40:29,408 INFO L78 Accepts]: Start accepts. Automaton has 4402 states and 6348 transitions. Word has length 160 [2022-11-03 02:40:29,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:29,409 INFO L495 AbstractCegarLoop]: Abstraction has 4402 states and 6348 transitions. [2022-11-03 02:40:29,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-03 02:40:29,409 INFO L276 IsEmpty]: Start isEmpty. Operand 4402 states and 6348 transitions. [2022-11-03 02:40:29,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-11-03 02:40:29,412 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:29,413 INFO L195 NwaCegarLoop]: trace histogram [11, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:40:29,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 02:40:29,414 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 02:40:29,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:29,414 INFO L85 PathProgramCache]: Analyzing trace with hash -420062579, now seen corresponding path program 1 times [2022-11-03 02:40:29,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:40:29,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237915203] [2022-11-03 02:40:29,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:29,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:40:29,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:29,979 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2022-11-03 02:40:29,979 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:40:29,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237915203] [2022-11-03 02:40:29,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237915203] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:40:29,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:40:29,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:40:29,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423962376] [2022-11-03 02:40:29,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:40:29,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:40:29,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:40:29,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:40:29,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:40:29,983 INFO L87 Difference]: Start difference. First operand 4402 states and 6348 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-03 02:40:33,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:33,813 INFO L93 Difference]: Finished difference Result 4408 states and 6353 transitions. [2022-11-03 02:40:33,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:40:33,814 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (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 165 [2022-11-03 02:40:33,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:33,839 INFO L225 Difference]: With dead ends: 4408 [2022-11-03 02:40:33,839 INFO L226 Difference]: Without dead ends: 4406 [2022-11-03 02:40:33,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:40:33,843 INFO L413 NwaCegarLoop]: 1201 mSDtfsCounter, 1338 mSDsluCounter, 2755 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1344 SdHoareTripleChecker+Valid, 3584 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:33,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1344 Valid, 3584 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-03 02:40:33,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4406 states. [2022-11-03 02:40:34,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4406 to 4406. [2022-11-03 02:40:34,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4406 states, 2530 states have (on average 1.2715415019762846) internal successors, (3217), 2674 states have internal predecessors, (3217), 1551 states have call successors, (1551), 361 states have call predecessors, (1551), 322 states have return successors, (1583), 1405 states have call predecessors, (1583), 1547 states have call successors, (1583) [2022-11-03 02:40:34,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4406 states to 4406 states and 6351 transitions. [2022-11-03 02:40:34,278 INFO L78 Accepts]: Start accepts. Automaton has 4406 states and 6351 transitions. Word has length 165 [2022-11-03 02:40:34,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:34,279 INFO L495 AbstractCegarLoop]: Abstraction has 4406 states and 6351 transitions. [2022-11-03 02:40:34,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-03 02:40:34,279 INFO L276 IsEmpty]: Start isEmpty. Operand 4406 states and 6351 transitions. [2022-11-03 02:40:34,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-11-03 02:40:34,282 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:34,283 INFO L195 NwaCegarLoop]: trace histogram [11, 7, 7, 7, 7, 7, 7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:40:34,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 02:40:34,283 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 02:40:34,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:34,284 INFO L85 PathProgramCache]: Analyzing trace with hash -49249180, now seen corresponding path program 1 times [2022-11-03 02:40:34,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:40:34,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843799334] [2022-11-03 02:40:34,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:34,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:40:34,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:34,602 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2022-11-03 02:40:34,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:40:34,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843799334] [2022-11-03 02:40:34,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843799334] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:40:34,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:40:34,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:40:34,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651699540] [2022-11-03 02:40:34,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:40:34,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:40:34,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:40:34,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:40:34,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:40:34,605 INFO L87 Difference]: Start difference. First operand 4406 states and 6351 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2022-11-03 02:40:36,862 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:40:38,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:40:39,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:39,070 INFO L93 Difference]: Finished difference Result 9705 states and 14001 transitions. [2022-11-03 02:40:39,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:40:39,071 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), 3 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 165 [2022-11-03 02:40:39,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:39,100 INFO L225 Difference]: With dead ends: 9705 [2022-11-03 02:40:39,100 INFO L226 Difference]: Without dead ends: 5368 [2022-11-03 02:40:39,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:40:39,123 INFO L413 NwaCegarLoop]: 1568 mSDtfsCounter, 466 mSDsluCounter, 1372 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 2767 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:39,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [466 Valid, 2767 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-11-03 02:40:39,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5368 states. [2022-11-03 02:40:39,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5368 to 5313. [2022-11-03 02:40:39,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5313 states, 3075 states have (on average 1.272520325203252) internal successors, (3913), 3265 states have internal predecessors, (3913), 1835 states have call successors, (1835), 472 states have call predecessors, (1835), 400 states have return successors, (1879), 1610 states have call predecessors, (1879), 1831 states have call successors, (1879) [2022-11-03 02:40:39,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5313 states to 5313 states and 7627 transitions. [2022-11-03 02:40:39,719 INFO L78 Accepts]: Start accepts. Automaton has 5313 states and 7627 transitions. Word has length 165 [2022-11-03 02:40:39,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:39,720 INFO L495 AbstractCegarLoop]: Abstraction has 5313 states and 7627 transitions. [2022-11-03 02:40:39,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2022-11-03 02:40:39,720 INFO L276 IsEmpty]: Start isEmpty. Operand 5313 states and 7627 transitions. [2022-11-03 02:40:39,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-11-03 02:40:39,723 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:39,723 INFO L195 NwaCegarLoop]: trace histogram [11, 7, 7, 7, 7, 7, 7, 7, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:40:39,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 02:40:39,723 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 02:40:39,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:39,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1747620889, now seen corresponding path program 1 times [2022-11-03 02:40:39,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:40:39,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574695138] [2022-11-03 02:40:39,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:39,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:40:39,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:40,219 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked. [2022-11-03 02:40:40,220 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:40:40,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574695138] [2022-11-03 02:40:40,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574695138] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:40:40,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:40:40,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:40:40,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17061369] [2022-11-03 02:40:40,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:40:40,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:40:40,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:40:40,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:40:40,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:40:40,222 INFO L87 Difference]: Start difference. First operand 5313 states and 7627 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, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-03 02:40:43,178 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:40:44,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:44,435 INFO L93 Difference]: Finished difference Result 5319 states and 7632 transitions. [2022-11-03 02:40:44,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:40:44,435 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, (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 163 [2022-11-03 02:40:44,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:44,460 INFO L225 Difference]: With dead ends: 5319 [2022-11-03 02:40:44,460 INFO L226 Difference]: Without dead ends: 5317 [2022-11-03 02:40:44,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:40:44,465 INFO L413 NwaCegarLoop]: 1201 mSDtfsCounter, 1339 mSDsluCounter, 2755 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1344 SdHoareTripleChecker+Valid, 3584 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:44,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1344 Valid, 3584 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-11-03 02:40:44,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5317 states. [2022-11-03 02:40:45,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5317 to 5317. [2022-11-03 02:40:45,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5317 states, 3078 states have (on average 1.2722547108512021) internal successors, (3916), 3268 states have internal predecessors, (3916), 1835 states have call successors, (1835), 473 states have call predecessors, (1835), 401 states have return successors, (1879), 1610 states have call predecessors, (1879), 1831 states have call successors, (1879) [2022-11-03 02:40:45,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5317 states to 5317 states and 7630 transitions. [2022-11-03 02:40:45,035 INFO L78 Accepts]: Start accepts. Automaton has 5317 states and 7630 transitions. Word has length 163 [2022-11-03 02:40:45,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:45,037 INFO L495 AbstractCegarLoop]: Abstraction has 5317 states and 7630 transitions. [2022-11-03 02:40:45,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-03 02:40:45,037 INFO L276 IsEmpty]: Start isEmpty. Operand 5317 states and 7630 transitions. [2022-11-03 02:40:45,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-11-03 02:40:45,041 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:45,041 INFO L195 NwaCegarLoop]: trace histogram [11, 8, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:40:45,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-03 02:40:45,041 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 02:40:45,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:45,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1348625973, now seen corresponding path program 1 times [2022-11-03 02:40:45,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:40:45,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401148489] [2022-11-03 02:40:45,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:45,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:40:45,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:45,558 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2022-11-03 02:40:45,559 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:40:45,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401148489] [2022-11-03 02:40:45,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401148489] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:40:45,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:40:45,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:40:45,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041734960] [2022-11-03 02:40:45,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:40:45,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:40:45,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:40:45,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:40:45,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:40:45,562 INFO L87 Difference]: Start difference. First operand 5317 states and 7630 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-03 02:40:48,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:40:50,155 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:40:50,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:50,568 INFO L93 Difference]: Finished difference Result 5323 states and 7635 transitions. [2022-11-03 02:40:50,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:40:50,568 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 176 [2022-11-03 02:40:50,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:50,593 INFO L225 Difference]: With dead ends: 5323 [2022-11-03 02:40:50,593 INFO L226 Difference]: Without dead ends: 5321 [2022-11-03 02:40:50,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:40:50,598 INFO L413 NwaCegarLoop]: 1201 mSDtfsCounter, 1338 mSDsluCounter, 2755 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1342 SdHoareTripleChecker+Valid, 3584 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:50,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1342 Valid, 3584 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-11-03 02:40:50,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5321 states. [2022-11-03 02:40:51,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5321 to 5321. [2022-11-03 02:40:51,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5321 states, 3081 states have (on average 1.2719896137617657) internal successors, (3919), 3271 states have internal predecessors, (3919), 1835 states have call successors, (1835), 474 states have call predecessors, (1835), 402 states have return successors, (1879), 1610 states have call predecessors, (1879), 1831 states have call successors, (1879) [2022-11-03 02:40:51,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5321 states to 5321 states and 7633 transitions. [2022-11-03 02:40:51,138 INFO L78 Accepts]: Start accepts. Automaton has 5321 states and 7633 transitions. Word has length 176 [2022-11-03 02:40:51,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:51,138 INFO L495 AbstractCegarLoop]: Abstraction has 5321 states and 7633 transitions. [2022-11-03 02:40:51,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-03 02:40:51,139 INFO L276 IsEmpty]: Start isEmpty. Operand 5321 states and 7633 transitions. [2022-11-03 02:40:51,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-11-03 02:40:51,142 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:51,142 INFO L195 NwaCegarLoop]: trace histogram [11, 9, 8, 8, 7, 7, 7, 7, 7, 7, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:40:51,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-03 02:40:51,143 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 02:40:51,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:51,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1363452545, now seen corresponding path program 1 times [2022-11-03 02:40:51,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:40:51,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808624211] [2022-11-03 02:40:51,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:51,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:40:51,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:51,638 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2022-11-03 02:40:51,638 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:40:51,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808624211] [2022-11-03 02:40:51,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808624211] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:40:51,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:40:51,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:40:51,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962716769] [2022-11-03 02:40:51,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:40:51,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:40:51,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:40:51,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:40:51,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:40:51,641 INFO L87 Difference]: Start difference. First operand 5321 states and 7633 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-11-03 02:40:54,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:40:57,398 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:40:58,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:58,025 INFO L93 Difference]: Finished difference Result 6185 states and 8739 transitions. [2022-11-03 02:40:58,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:40:58,026 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 180 [2022-11-03 02:40:58,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:58,054 INFO L225 Difference]: With dead ends: 6185 [2022-11-03 02:40:58,055 INFO L226 Difference]: Without dead ends: 6183 [2022-11-03 02:40:58,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:40:58,060 INFO L413 NwaCegarLoop]: 1373 mSDtfsCounter, 930 mSDsluCounter, 3816 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 933 SdHoareTripleChecker+Valid, 4720 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:58,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [933 Valid, 4720 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-11-03 02:40:58,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6183 states. [2022-11-03 02:40:58,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6183 to 6141. [2022-11-03 02:40:58,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6141 states, 3485 states have (on average 1.2556671449067431) internal successors, (4376), 3690 states have internal predecessors, (4376), 2131 states have call successors, (2131), 630 states have call predecessors, (2131), 522 states have return successors, (2181), 1864 states have call predecessors, (2181), 2127 states have call successors, (2181) [2022-11-03 02:40:58,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6141 states to 6141 states and 8688 transitions. [2022-11-03 02:40:58,739 INFO L78 Accepts]: Start accepts. Automaton has 6141 states and 8688 transitions. Word has length 180 [2022-11-03 02:40:58,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:58,740 INFO L495 AbstractCegarLoop]: Abstraction has 6141 states and 8688 transitions. [2022-11-03 02:40:58,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-11-03 02:40:58,740 INFO L276 IsEmpty]: Start isEmpty. Operand 6141 states and 8688 transitions. [2022-11-03 02:40:58,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-11-03 02:40:58,744 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:58,744 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 9, 9, 7, 7, 7, 7, 7, 7, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:40:58,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-03 02:40:58,744 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 02:40:58,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:58,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1567549581, now seen corresponding path program 1 times [2022-11-03 02:40:58,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:40:58,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495473195] [2022-11-03 02:40:58,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:58,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:40:58,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:59,215 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2022-11-03 02:40:59,215 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:40:59,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495473195] [2022-11-03 02:40:59,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495473195] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:40:59,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:40:59,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:40:59,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593607886] [2022-11-03 02:40:59,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:40:59,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:40:59,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:40:59,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:40:59,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:40:59,219 INFO L87 Difference]: Start difference. First operand 6141 states and 8688 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-03 02:41:02,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:41:02,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:02,969 INFO L93 Difference]: Finished difference Result 6155 states and 8697 transitions. [2022-11-03 02:41:02,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:41:02,969 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 185 [2022-11-03 02:41:02,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:02,997 INFO L225 Difference]: With dead ends: 6155 [2022-11-03 02:41:02,997 INFO L226 Difference]: Without dead ends: 6153 [2022-11-03 02:41:03,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:41:03,002 INFO L413 NwaCegarLoop]: 1207 mSDtfsCounter, 1332 mSDsluCounter, 2785 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1336 SdHoareTripleChecker+Valid, 3611 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:03,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1336 Valid, 3611 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 588 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2022-11-03 02:41:03,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6153 states. [2022-11-03 02:41:03,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6153 to 6153. [2022-11-03 02:41:03,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6153 states, 3492 states have (on average 1.2551546391752577) internal successors, (4383), 3697 states have internal predecessors, (4383), 2131 states have call successors, (2131), 635 states have call predecessors, (2131), 527 states have return successors, (2181), 1864 states have call predecessors, (2181), 2127 states have call successors, (2181) [2022-11-03 02:41:03,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6153 states to 6153 states and 8695 transitions. [2022-11-03 02:41:03,780 INFO L78 Accepts]: Start accepts. Automaton has 6153 states and 8695 transitions. Word has length 185 [2022-11-03 02:41:03,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:03,781 INFO L495 AbstractCegarLoop]: Abstraction has 6153 states and 8695 transitions. [2022-11-03 02:41:03,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-03 02:41:03,781 INFO L276 IsEmpty]: Start isEmpty. Operand 6153 states and 8695 transitions. [2022-11-03 02:41:03,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-11-03 02:41:03,784 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:03,785 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 7, 7, 7, 7, 7, 7, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:03,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-03 02:41:03,785 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 02:41:03,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:03,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1915058407, now seen corresponding path program 1 times [2022-11-03 02:41:03,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:41:03,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035089767] [2022-11-03 02:41:03,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:03,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:41:03,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:04,211 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 443 trivial. 0 not checked. [2022-11-03 02:41:04,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:41:04,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035089767] [2022-11-03 02:41:04,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035089767] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:41:04,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:41:04,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:41:04,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860873925] [2022-11-03 02:41:04,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:41:04,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:41:04,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:41:04,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:41:04,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:41:04,217 INFO L87 Difference]: Start difference. First operand 6153 states and 8695 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, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-03 02:41:06,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:41:08,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:08,620 INFO L93 Difference]: Finished difference Result 6159 states and 8700 transitions. [2022-11-03 02:41:08,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:41:08,621 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, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 183 [2022-11-03 02:41:08,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:08,642 INFO L225 Difference]: With dead ends: 6159 [2022-11-03 02:41:08,642 INFO L226 Difference]: Without dead ends: 6155 [2022-11-03 02:41:08,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:41:08,651 INFO L413 NwaCegarLoop]: 1201 mSDtfsCounter, 1339 mSDsluCounter, 2755 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1340 SdHoareTripleChecker+Valid, 3584 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:08,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1340 Valid, 3584 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-03 02:41:08,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6155 states. [2022-11-03 02:41:09,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6155 to 6155. [2022-11-03 02:41:09,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6155 states, 3494 states have (on average 1.254722381224957) internal successors, (4384), 3698 states have internal predecessors, (4384), 2131 states have call successors, (2131), 636 states have call predecessors, (2131), 527 states have return successors, (2181), 1864 states have call predecessors, (2181), 2127 states have call successors, (2181) [2022-11-03 02:41:09,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6155 states to 6155 states and 8696 transitions. [2022-11-03 02:41:09,373 INFO L78 Accepts]: Start accepts. Automaton has 6155 states and 8696 transitions. Word has length 183 [2022-11-03 02:41:09,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:09,374 INFO L495 AbstractCegarLoop]: Abstraction has 6155 states and 8696 transitions. [2022-11-03 02:41:09,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-03 02:41:09,375 INFO L276 IsEmpty]: Start isEmpty. Operand 6155 states and 8696 transitions. [2022-11-03 02:41:09,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-11-03 02:41:09,379 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:09,379 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 7, 7, 7, 7, 7, 7, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:09,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-03 02:41:09,379 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 02:41:09,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:09,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1773146059, now seen corresponding path program 1 times [2022-11-03 02:41:09,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:41:09,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900433468] [2022-11-03 02:41:09,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:09,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:41:09,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:09,978 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 491 trivial. 0 not checked. [2022-11-03 02:41:09,978 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:41:09,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900433468] [2022-11-03 02:41:09,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900433468] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:41:09,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:41:09,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:41:09,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843483378] [2022-11-03 02:41:09,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:41:09,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:41:09,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:41:09,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:41:09,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:41:09,981 INFO L87 Difference]: Start difference. First operand 6155 states and 8696 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-11-03 02:41:12,364 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:41:14,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:14,827 INFO L93 Difference]: Finished difference Result 6155 states and 8696 transitions. [2022-11-03 02:41:14,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:41:14,828 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 196 [2022-11-03 02:41:14,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:14,855 INFO L225 Difference]: With dead ends: 6155 [2022-11-03 02:41:14,856 INFO L226 Difference]: Without dead ends: 5996 [2022-11-03 02:41:14,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:41:14,863 INFO L413 NwaCegarLoop]: 1199 mSDtfsCounter, 1334 mSDsluCounter, 2754 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1334 SdHoareTripleChecker+Valid, 3581 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:14,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1334 Valid, 3581 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-11-03 02:41:14,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5996 states. [2022-11-03 02:41:15,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5996 to 5996. [2022-11-03 02:41:15,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5996 states, 3440 states have (on average 1.2482558139534883) internal successors, (4294), 3608 states have internal predecessors, (4294), 2042 states have call successors, (2042), 609 states have call predecessors, (2042), 512 states have return successors, (2096), 1822 states have call predecessors, (2096), 2042 states have call successors, (2096) [2022-11-03 02:41:15,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5996 states to 5996 states and 8432 transitions. [2022-11-03 02:41:15,593 INFO L78 Accepts]: Start accepts. Automaton has 5996 states and 8432 transitions. Word has length 196 [2022-11-03 02:41:15,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:15,594 INFO L495 AbstractCegarLoop]: Abstraction has 5996 states and 8432 transitions. [2022-11-03 02:41:15,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-11-03 02:41:15,594 INFO L276 IsEmpty]: Start isEmpty. Operand 5996 states and 8432 transitions. [2022-11-03 02:41:15,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-11-03 02:41:15,598 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:15,598 INFO L195 NwaCegarLoop]: trace histogram [13, 8, 8, 7, 7, 7, 7, 7, 7, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:15,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-03 02:41:15,599 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 02:41:15,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:15,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1050896028, now seen corresponding path program 1 times [2022-11-03 02:41:15,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:41:15,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996410035] [2022-11-03 02:41:15,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:15,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:41:15,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:16,598 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2022-11-03 02:41:16,599 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:41:16,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996410035] [2022-11-03 02:41:16,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996410035] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:41:16,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:41:16,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:41:16,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835050861] [2022-11-03 02:41:16,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:41:16,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:41:16,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:41:16,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:41:16,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:41:16,602 INFO L87 Difference]: Start difference. First operand 5996 states and 8432 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-03 02:41:21,550 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:41:22,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:22,155 INFO L93 Difference]: Finished difference Result 6009 states and 8443 transitions. [2022-11-03 02:41:22,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:41:22,156 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 208 [2022-11-03 02:41:22,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:22,173 INFO L225 Difference]: With dead ends: 6009 [2022-11-03 02:41:22,173 INFO L226 Difference]: Without dead ends: 6007 [2022-11-03 02:41:22,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:41:22,177 INFO L413 NwaCegarLoop]: 1322 mSDtfsCounter, 856 mSDsluCounter, 3731 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 4584 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:22,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [857 Valid, 4584 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-11-03 02:41:22,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6007 states. [2022-11-03 02:41:22,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6007 to 5996. [2022-11-03 02:41:22,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5996 states, 3440 states have (on average 1.2450581395348836) internal successors, (4283), 3608 states have internal predecessors, (4283), 2042 states have call successors, (2042), 609 states have call predecessors, (2042), 512 states have return successors, (2096), 1822 states have call predecessors, (2096), 2042 states have call successors, (2096) [2022-11-03 02:41:22,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5996 states to 5996 states and 8421 transitions. [2022-11-03 02:41:22,871 INFO L78 Accepts]: Start accepts. Automaton has 5996 states and 8421 transitions. Word has length 208 [2022-11-03 02:41:22,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:22,871 INFO L495 AbstractCegarLoop]: Abstraction has 5996 states and 8421 transitions. [2022-11-03 02:41:22,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-03 02:41:22,871 INFO L276 IsEmpty]: Start isEmpty. Operand 5996 states and 8421 transitions. [2022-11-03 02:41:22,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2022-11-03 02:41:22,880 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:22,880 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 13, 7, 7, 7, 7, 7, 7, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:22,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-03 02:41:22,880 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 02:41:22,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:22,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1364524109, now seen corresponding path program 1 times [2022-11-03 02:41:22,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:41:22,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819723937] [2022-11-03 02:41:22,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:22,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:41:23,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:23,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2725 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2725 trivial. 0 not checked. [2022-11-03 02:41:23,614 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:41:23,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819723937] [2022-11-03 02:41:23,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819723937] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:41:23,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:41:23,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:41:23,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388028305] [2022-11-03 02:41:23,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:41:23,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:41:23,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:41:23,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:41:23,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:41:23,617 INFO L87 Difference]: Start difference. First operand 5996 states and 8421 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 2 states have call successors, (61), 2 states have call predecessors, (61), 2 states have return successors, (58), 2 states have call predecessors, (58), 2 states have call successors, (58) [2022-11-03 02:41:26,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:26,905 INFO L93 Difference]: Finished difference Result 11963 states and 16887 transitions. [2022-11-03 02:41:26,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:41:26,906 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 2 states have call successors, (61), 2 states have call predecessors, (61), 2 states have return successors, (58), 2 states have call predecessors, (58), 2 states have call successors, (58) Word has length 552 [2022-11-03 02:41:26,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:26,934 INFO L225 Difference]: With dead ends: 11963 [2022-11-03 02:41:26,935 INFO L226 Difference]: Without dead ends: 6036 [2022-11-03 02:41:26,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:41:26,959 INFO L413 NwaCegarLoop]: 1155 mSDtfsCounter, 2 mSDsluCounter, 1332 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 2303 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:26,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 2303 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 02:41:26,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6036 states. [2022-11-03 02:41:27,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6036 to 6004. [2022-11-03 02:41:27,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6004 states, 3448 states have (on average 1.2444895591647331) internal successors, (4291), 3616 states have internal predecessors, (4291), 2042 states have call successors, (2042), 609 states have call predecessors, (2042), 512 states have return successors, (2096), 1822 states have call predecessors, (2096), 2042 states have call successors, (2096) [2022-11-03 02:41:27,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6004 states to 6004 states and 8429 transitions. [2022-11-03 02:41:27,737 INFO L78 Accepts]: Start accepts. Automaton has 6004 states and 8429 transitions. Word has length 552 [2022-11-03 02:41:27,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:27,737 INFO L495 AbstractCegarLoop]: Abstraction has 6004 states and 8429 transitions. [2022-11-03 02:41:27,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 2 states have call successors, (61), 2 states have call predecessors, (61), 2 states have return successors, (58), 2 states have call predecessors, (58), 2 states have call successors, (58) [2022-11-03 02:41:27,738 INFO L276 IsEmpty]: Start isEmpty. Operand 6004 states and 8429 transitions. [2022-11-03 02:41:27,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 595 [2022-11-03 02:41:27,747 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:27,747 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 13, 7, 7, 7, 7, 7, 7, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:27,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-03 02:41:27,748 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 02:41:27,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:27,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1200348678, now seen corresponding path program 1 times [2022-11-03 02:41:27,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:41:27,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591475011] [2022-11-03 02:41:27,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:27,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:41:27,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:28,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3226 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3225 trivial. 0 not checked. [2022-11-03 02:41:28,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:41:28,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591475011] [2022-11-03 02:41:28,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591475011] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:41:28,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065507754] [2022-11-03 02:41:28,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:28,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:28,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26244769-1da9-4641-ae9b-1d9e01d14a37/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:41:28,482 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26244769-1da9-4641-ae9b-1d9e01d14a37/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:41:28,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26244769-1da9-4641-ae9b-1d9e01d14a37/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:41:29,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:29,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 6473 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:41:29,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:30,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3226 backedges. 588 proven. 1 refuted. 0 times theorem prover too weak. 2637 trivial. 0 not checked. [2022-11-03 02:41:30,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:31,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3226 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3225 trivial. 0 not checked. [2022-11-03 02:41:31,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065507754] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:31,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1254481850] [2022-11-03 02:41:31,410 INFO L159 IcfgInterpreter]: Started Sifa with 201 locations of interest [2022-11-03 02:41:31,410 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:41:31,416 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:41:31,422 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:41:31,422 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:41:40,322 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2022-11-03 02:41:40,804 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2022-11-03 02:41:42,588 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21