./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a11cae-3506-451d-a908-4e1a4d666b58/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a11cae-3506-451d-a908-4e1a4d666b58/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a11cae-3506-451d-a908-4e1a4d666b58/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a11cae-3506-451d-a908-4e1a4d666b58/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a11cae-3506-451d-a908-4e1a4d666b58/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a11cae-3506-451d-a908-4e1a4d666b58/bin/utaipan-Q6hlc19bkW --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 527ba95af45b5d863cb3ca1867267fd54ac6958329e64d7162c5caa88bde96c3 --- 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-4e7fbc6 [2022-11-23 14:43:42,969 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:43:42,971 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:43:42,999 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:43:43,000 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:43:43,003 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:43:43,006 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:43:43,009 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:43:43,012 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:43:43,018 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:43:43,019 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:43:43,021 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:43:43,022 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:43:43,025 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:43:43,027 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:43:43,028 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:43:43,030 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:43:43,031 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:43:43,033 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:43:43,039 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:43:43,041 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:43:43,043 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:43:43,045 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:43:43,046 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:43:43,057 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:43:43,057 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:43:43,057 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:43:43,059 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:43:43,060 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:43:43,062 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:43:43,062 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:43:43,063 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:43:43,065 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:43:43,067 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:43:43,068 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:43:43,068 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:43:43,069 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:43:43,069 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:43:43,069 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:43:43,071 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:43:43,072 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:43:43,073 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a11cae-3506-451d-a908-4e1a4d666b58/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-23 14:43:43,114 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:43:43,114 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:43:43,117 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:43:43,117 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:43:43,118 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:43:43,118 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:43:43,119 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:43:43,119 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:43:43,119 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:43:43,119 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:43:43,120 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:43:43,121 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:43:43,121 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:43:43,121 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:43:43,121 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:43:43,122 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:43:43,122 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:43:43,122 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:43:43,123 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:43:43,124 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:43:43,124 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:43:43,124 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:43:43,124 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:43:43,125 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:43:43,125 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:43:43,125 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:43:43,125 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:43:43,126 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:43:43,126 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:43:43,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:43:43,126 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:43:43,127 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:43:43,127 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:43:43,127 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:43:43,127 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:43:43,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:43:43,128 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:43:43,128 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:43:43,128 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_c7a11cae-3506-451d-a908-4e1a4d666b58/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a11cae-3506-451d-a908-4e1a4d666b58/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 527ba95af45b5d863cb3ca1867267fd54ac6958329e64d7162c5caa88bde96c3 [2022-11-23 14:43:43,452 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:43:43,486 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:43:43,489 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:43:43,490 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:43:43,491 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:43:43,492 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a11cae-3506-451d-a908-4e1a4d666b58/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i [2022-11-23 14:43:46,596 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:43:47,372 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:43:47,373 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a11cae-3506-451d-a908-4e1a4d666b58/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i [2022-11-23 14:43:47,433 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a11cae-3506-451d-a908-4e1a4d666b58/bin/utaipan-Q6hlc19bkW/data/6228910dd/2b8f13cd7f1b45c480f08e67d5db06ce/FLAG60005910d [2022-11-23 14:43:47,450 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a11cae-3506-451d-a908-4e1a4d666b58/bin/utaipan-Q6hlc19bkW/data/6228910dd/2b8f13cd7f1b45c480f08e67d5db06ce [2022-11-23 14:43:47,453 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:43:47,455 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:43:47,458 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:43:47,458 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:43:47,462 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:43:47,464 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:43:47" (1/1) ... [2022-11-23 14:43:47,465 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c509c24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:47, skipping insertion in model container [2022-11-23 14:43:47,465 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:43:47" (1/1) ... [2022-11-23 14:43:47,473 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:43:47,723 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:43:52,188 WARN L237 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_c7a11cae-3506-451d-a908-4e1a4d666b58/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i[470813,470826] [2022-11-23 14:43:52,192 WARN L237 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_c7a11cae-3506-451d-a908-4e1a4d666b58/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i[470982,470995] [2022-11-23 14:43:52,193 WARN L237 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_c7a11cae-3506-451d-a908-4e1a4d666b58/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i[471149,471162] [2022-11-23 14:43:52,193 WARN L237 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_c7a11cae-3506-451d-a908-4e1a4d666b58/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i[471317,471330] [2022-11-23 14:43:52,224 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:43:52,255 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:43:52,870 WARN L237 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_c7a11cae-3506-451d-a908-4e1a4d666b58/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i[470813,470826] [2022-11-23 14:43:52,871 WARN L237 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_c7a11cae-3506-451d-a908-4e1a4d666b58/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i[470982,470995] [2022-11-23 14:43:52,871 WARN L237 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_c7a11cae-3506-451d-a908-4e1a4d666b58/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i[471149,471162] [2022-11-23 14:43:52,872 WARN L237 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_c7a11cae-3506-451d-a908-4e1a4d666b58/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i[471317,471330] [2022-11-23 14:43:52,880 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:43:53,063 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:43:53,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:53 WrapperNode [2022-11-23 14:43:53,064 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:43:53,066 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:43:53,066 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:43:53,066 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:43:53,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:53" (1/1) ... [2022-11-23 14:43:53,259 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:53" (1/1) ... [2022-11-23 14:43:53,558 INFO L138 Inliner]: procedures = 526, calls = 4210, calls flagged for inlining = 232, calls inlined = 215, statements flattened = 8627 [2022-11-23 14:43:53,559 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:43:53,560 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:43:53,560 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:43:53,561 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:43:53,570 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:53" (1/1) ... [2022-11-23 14:43:53,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:53" (1/1) ... [2022-11-23 14:43:53,654 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:53" (1/1) ... [2022-11-23 14:43:53,655 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:53" (1/1) ... [2022-11-23 14:43:54,044 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:53" (1/1) ... [2022-11-23 14:43:54,120 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:53" (1/1) ... [2022-11-23 14:43:54,167 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:53" (1/1) ... [2022-11-23 14:43:54,218 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:53" (1/1) ... [2022-11-23 14:43:54,345 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:43:54,346 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:43:54,346 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:43:54,358 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:43:54,359 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:53" (1/1) ... [2022-11-23 14:43:54,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:43:54,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a11cae-3506-451d-a908-4e1a4d666b58/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:43:54,430 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a11cae-3506-451d-a908-4e1a4d666b58/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:43:54,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a11cae-3506-451d-a908-4e1a4d666b58/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:43:54,578 INFO L130 BoogieDeclarations]: Found specification of procedure disable_ast [2022-11-23 14:43:54,578 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_ast [2022-11-23 14:43:54,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-23 14:43:54,579 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-23 14:43:54,579 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2022-11-23 14:43:54,579 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2022-11-23 14:43:54,579 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-23 14:43:54,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-23 14:43:54,579 INFO L130 BoogieDeclarations]: Found specification of procedure type4_infoblock [2022-11-23 14:43:54,580 INFO L138 BoogieDeclarations]: Found implementation of procedure type4_infoblock [2022-11-23 14:43:54,580 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_put_cache [2022-11-23 14:43:54,580 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_put_cache [2022-11-23 14:43:54,580 INFO L130 BoogieDeclarations]: Found specification of procedure pci_read_config_word [2022-11-23 14:43:54,580 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_read_config_word [2022-11-23 14:43:54,580 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_lock_of_de4x5_private [2022-11-23 14:43:54,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_lock_of_de4x5_private [2022-11-23 14:43:54,581 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2022-11-23 14:43:54,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2022-11-23 14:43:54,581 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_lock_of_de4x5_private [2022-11-23 14:43:54,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_lock_of_de4x5_private [2022-11-23 14:43:54,582 INFO L130 BoogieDeclarations]: Found specification of procedure getfrom_mii [2022-11-23 14:43:54,582 INFO L138 BoogieDeclarations]: Found implementation of procedure getfrom_mii [2022-11-23 14:43:54,583 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_switch_mac_port [2022-11-23 14:43:54,583 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_switch_mac_port [2022-11-23 14:43:54,583 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2022-11-23 14:43:54,583 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2022-11-23 14:43:54,584 INFO L130 BoogieDeclarations]: Found specification of procedure srom_latch [2022-11-23 14:43:54,584 INFO L138 BoogieDeclarations]: Found implementation of procedure srom_latch [2022-11-23 14:43:54,584 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_69 [2022-11-23 14:43:54,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_69 [2022-11-23 14:43:54,584 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-11-23 14:43:54,599 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-11-23 14:43:54,599 INFO L130 BoogieDeclarations]: Found specification of procedure build_setup_frame [2022-11-23 14:43:54,599 INFO L138 BoogieDeclarations]: Found implementation of procedure build_setup_frame [2022-11-23 14:43:54,599 INFO L130 BoogieDeclarations]: Found specification of procedure type2_infoblock [2022-11-23 14:43:54,599 INFO L138 BoogieDeclarations]: Found implementation of procedure type2_infoblock [2022-11-23 14:43:54,599 INFO L130 BoogieDeclarations]: Found specification of procedure type0_infoblock [2022-11-23 14:43:54,600 INFO L138 BoogieDeclarations]: Found implementation of procedure type0_infoblock [2022-11-23 14:43:54,600 INFO L130 BoogieDeclarations]: Found specification of procedure skb_queue_empty [2022-11-23 14:43:54,600 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_queue_empty [2022-11-23 14:43:54,600 INFO L130 BoogieDeclarations]: Found specification of procedure DevicePresent [2022-11-23 14:43:54,600 INFO L138 BoogieDeclarations]: Found implementation of procedure DevicePresent [2022-11-23 14:43:54,600 INFO L130 BoogieDeclarations]: Found specification of procedure eth_mac_addr [2022-11-23 14:43:54,601 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_mac_addr [2022-11-23 14:43:54,601 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2022-11-23 14:43:54,601 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2022-11-23 14:43:54,602 INFO L130 BoogieDeclarations]: Found specification of procedure dc21143_infoleaf [2022-11-23 14:43:54,602 INFO L138 BoogieDeclarations]: Found implementation of procedure dc21143_infoleaf [2022-11-23 14:43:54,602 INFO L130 BoogieDeclarations]: Found specification of procedure set_multicast_list [2022-11-23 14:43:54,602 INFO L138 BoogieDeclarations]: Found implementation of procedure set_multicast_list [2022-11-23 14:43:54,602 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2022-11-23 14:43:54,602 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2022-11-23 14:43:54,602 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2022-11-23 14:43:54,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2022-11-23 14:43:54,603 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2022-11-23 14:43:54,603 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_sw_reset [2022-11-23 14:43:54,603 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_sw_reset [2022-11-23 14:43:54,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 14:43:54,603 INFO L130 BoogieDeclarations]: Found specification of procedure netif_queue_stopped [2022-11-23 14:43:54,604 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_queue_stopped [2022-11-23 14:43:54,604 INFO L130 BoogieDeclarations]: Found specification of procedure capable [2022-11-23 14:43:54,604 INFO L138 BoogieDeclarations]: Found implementation of procedure capable [2022-11-23 14:43:54,605 INFO L130 BoogieDeclarations]: Found specification of procedure eth_change_mtu [2022-11-23 14:43:54,605 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_change_mtu [2022-11-23 14:43:54,605 INFO L130 BoogieDeclarations]: Found specification of procedure is_spd_100 [2022-11-23 14:43:54,605 INFO L138 BoogieDeclarations]: Found implementation of procedure is_spd_100 [2022-11-23 14:43:54,606 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-11-23 14:43:54,606 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-11-23 14:43:54,606 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-23 14:43:54,607 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2022-11-23 14:43:54,607 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2022-11-23 14:43:54,607 INFO L130 BoogieDeclarations]: Found specification of procedure sendto_mii [2022-11-23 14:43:54,607 INFO L138 BoogieDeclarations]: Found implementation of procedure sendto_mii [2022-11-23 14:43:54,607 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_free_rx_buffs [2022-11-23 14:43:54,608 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_free_rx_buffs [2022-11-23 14:43:54,608 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2022-11-23 14:43:54,609 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2022-11-23 14:43:54,609 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2022-11-23 14:43:54,609 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2022-11-23 14:43:54,609 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~int [2022-11-23 14:43:54,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~int [2022-11-23 14:43:54,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-23 14:43:54,609 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2022-11-23 14:43:54,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2022-11-23 14:43:54,610 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 14:43:54,610 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2022-11-23 14:43:54,611 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2022-11-23 14:43:54,611 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-23 14:43:54,611 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-23 14:43:54,611 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_interrupt_context [2022-11-23 14:43:54,611 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_interrupt_context [2022-11-23 14:43:54,612 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2022-11-23 14:43:54,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2022-11-23 14:43:54,612 INFO L130 BoogieDeclarations]: Found specification of procedure ping_media [2022-11-23 14:43:54,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ping_media [2022-11-23 14:43:54,613 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_err_code [2022-11-23 14:43:54,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_err_code [2022-11-23 14:43:54,613 INFO L130 BoogieDeclarations]: Found specification of procedure srom_autoconf [2022-11-23 14:43:54,613 INFO L138 BoogieDeclarations]: Found implementation of procedure srom_autoconf [2022-11-23 14:43:54,613 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2022-11-23 14:43:54,613 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2022-11-23 14:43:54,613 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2022-11-23 14:43:54,613 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2022-11-23 14:43:54,614 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_tx [2022-11-23 14:43:54,616 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_tx [2022-11-23 14:43:54,619 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2022-11-23 14:43:54,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2022-11-23 14:43:54,620 INFO L130 BoogieDeclarations]: Found specification of procedure __skb_dequeue [2022-11-23 14:43:54,620 INFO L138 BoogieDeclarations]: Found implementation of procedure __skb_dequeue [2022-11-23 14:43:54,621 INFO L130 BoogieDeclarations]: Found specification of procedure srom_rd [2022-11-23 14:43:54,621 INFO L138 BoogieDeclarations]: Found implementation of procedure srom_rd [2022-11-23 14:43:54,622 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 14:43:54,622 INFO L130 BoogieDeclarations]: Found specification of procedure SetMulticastFilter [2022-11-23 14:43:54,622 INFO L138 BoogieDeclarations]: Found implementation of procedure SetMulticastFilter [2022-11-23 14:43:54,623 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:43:54,623 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_ioctl [2022-11-23 14:43:54,623 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_ioctl [2022-11-23 14:43:54,623 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2022-11-23 14:43:54,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2022-11-23 14:43:54,624 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2022-11-23 14:43:54,624 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2022-11-23 14:43:54,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-23 14:43:54,624 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2022-11-23 14:43:54,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2022-11-23 14:43:54,624 INFO L130 BoogieDeclarations]: Found specification of procedure getfrom_srom [2022-11-23 14:43:54,624 INFO L138 BoogieDeclarations]: Found implementation of procedure getfrom_srom [2022-11-23 14:43:54,624 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2022-11-23 14:43:54,625 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2022-11-23 14:43:54,625 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2022-11-23 14:43:54,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2022-11-23 14:43:54,625 INFO L130 BoogieDeclarations]: Found specification of procedure mii_swap [2022-11-23 14:43:54,625 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_swap [2022-11-23 14:43:54,625 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_reset_phy [2022-11-23 14:43:54,625 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_reset_phy [2022-11-23 14:43:54,626 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_putb_cache [2022-11-23 14:43:54,626 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_putb_cache [2022-11-23 14:43:54,626 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_spin_lock [2022-11-23 14:43:54,626 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_spin_lock [2022-11-23 14:43:54,626 INFO L130 BoogieDeclarations]: Found specification of procedure dc21142_infoleaf [2022-11-23 14:43:54,626 INFO L138 BoogieDeclarations]: Found implementation of procedure dc21142_infoleaf [2022-11-23 14:43:54,626 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2022-11-23 14:43:54,626 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2022-11-23 14:43:54,627 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_get_stats [2022-11-23 14:43:54,627 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_get_stats [2022-11-23 14:43:54,627 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2022-11-23 14:43:54,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2022-11-23 14:43:54,627 INFO L130 BoogieDeclarations]: Found specification of procedure dev_name [2022-11-23 14:43:54,627 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_name [2022-11-23 14:43:54,627 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_init_connection [2022-11-23 14:43:54,627 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_init_connection [2022-11-23 14:43:54,628 INFO L130 BoogieDeclarations]: Found specification of procedure mii_wr [2022-11-23 14:43:54,628 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_wr [2022-11-23 14:43:54,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:43:54,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:43:54,628 INFO L130 BoogieDeclarations]: Found specification of procedure dc21040_state [2022-11-23 14:43:54,628 INFO L138 BoogieDeclarations]: Found implementation of procedure dc21040_state [2022-11-23 14:43:54,628 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2022-11-23 14:43:54,629 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2022-11-23 14:43:54,629 INFO L130 BoogieDeclarations]: Found specification of procedure type3_infoblock [2022-11-23 14:43:54,629 INFO L138 BoogieDeclarations]: Found implementation of procedure type3_infoblock [2022-11-23 14:43:54,629 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-23 14:43:54,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-23 14:43:54,629 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-23 14:43:54,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-23 14:43:54,629 INFO L130 BoogieDeclarations]: Found specification of procedure reset_init_sia [2022-11-23 14:43:54,630 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_init_sia [2022-11-23 14:43:54,630 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2022-11-23 14:43:54,630 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2022-11-23 14:43:54,630 INFO L130 BoogieDeclarations]: Found specification of procedure request_irq [2022-11-23 14:43:54,630 INFO L138 BoogieDeclarations]: Found implementation of procedure request_irq [2022-11-23 14:43:54,630 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_alloc_rx_buff [2022-11-23 14:43:54,630 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_alloc_rx_buff [2022-11-23 14:43:54,647 INFO L130 BoogieDeclarations]: Found specification of procedure test_for_100Mb [2022-11-23 14:43:54,647 INFO L138 BoogieDeclarations]: Found implementation of procedure test_for_100Mb [2022-11-23 14:43:54,647 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_process_context [2022-11-23 14:43:54,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_process_context [2022-11-23 14:43:54,647 INFO L130 BoogieDeclarations]: Found specification of procedure type5_infoblock [2022-11-23 14:43:54,647 INFO L138 BoogieDeclarations]: Found implementation of procedure type5_infoblock [2022-11-23 14:43:54,648 INFO L130 BoogieDeclarations]: Found specification of procedure load_packet [2022-11-23 14:43:54,648 INFO L138 BoogieDeclarations]: Found implementation of procedure load_packet [2022-11-23 14:43:54,648 INFO L130 BoogieDeclarations]: Found specification of procedure dc21140m_autoconf [2022-11-23 14:43:54,648 INFO L138 BoogieDeclarations]: Found implementation of procedure dc21140m_autoconf [2022-11-23 14:43:54,648 INFO L130 BoogieDeclarations]: Found specification of procedure is_100_up [2022-11-23 14:43:54,648 INFO L138 BoogieDeclarations]: Found implementation of procedure is_100_up [2022-11-23 14:43:54,648 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_open [2022-11-23 14:43:54,648 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_open [2022-11-23 14:43:54,649 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-23 14:43:54,649 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-23 14:43:54,649 INFO L130 BoogieDeclarations]: Found specification of procedure mii_ta [2022-11-23 14:43:54,649 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_ta [2022-11-23 14:43:54,649 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2022-11-23 14:43:54,649 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2022-11-23 14:43:54,649 INFO L130 BoogieDeclarations]: Found specification of procedure dc21040_autoconf [2022-11-23 14:43:54,649 INFO L138 BoogieDeclarations]: Found implementation of procedure dc21040_autoconf [2022-11-23 14:43:54,650 INFO L130 BoogieDeclarations]: Found specification of procedure get_unaligned_le16 [2022-11-23 14:43:54,650 INFO L138 BoogieDeclarations]: Found implementation of procedure get_unaligned_le16 [2022-11-23 14:43:54,650 INFO L130 BoogieDeclarations]: Found specification of procedure test_mii_reg [2022-11-23 14:43:54,650 INFO L138 BoogieDeclarations]: Found implementation of procedure test_mii_reg [2022-11-23 14:43:54,650 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_cache_state [2022-11-23 14:43:54,650 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_cache_state [2022-11-23 14:43:54,650 INFO L130 BoogieDeclarations]: Found specification of procedure netif_start_queue [2022-11-23 14:43:54,650 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_start_queue [2022-11-23 14:43:54,651 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_pci_remove [2022-11-23 14:43:54,651 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_pci_remove [2022-11-23 14:43:54,651 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 14:43:54,651 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_dbg_media [2022-11-23 14:43:54,651 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_dbg_media [2022-11-23 14:43:54,651 INFO L130 BoogieDeclarations]: Found specification of procedure autoconf_media [2022-11-23 14:43:54,651 INFO L138 BoogieDeclarations]: Found implementation of procedure autoconf_media [2022-11-23 14:43:54,652 INFO L130 BoogieDeclarations]: Found specification of procedure dc21041_autoconf [2022-11-23 14:43:54,652 INFO L138 BoogieDeclarations]: Found implementation of procedure dc21041_autoconf [2022-11-23 14:43:54,652 INFO L130 BoogieDeclarations]: Found specification of procedure mii_rd [2022-11-23 14:43:54,652 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_rd [2022-11-23 14:43:54,652 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-23 14:43:54,652 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_ast [2022-11-23 14:43:54,652 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_ast [2022-11-23 14:43:54,652 INFO L130 BoogieDeclarations]: Found specification of procedure get_unaligned_le32 [2022-11-23 14:43:54,653 INFO L138 BoogieDeclarations]: Found implementation of procedure get_unaligned_le32 [2022-11-23 14:43:54,653 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~u_char~0~X~$Pointer$~TO~int [2022-11-23 14:43:54,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~u_char~0~X~$Pointer$~TO~int [2022-11-23 14:43:54,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-23 14:43:54,653 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2022-11-23 14:43:54,653 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2022-11-23 14:43:54,653 INFO L130 BoogieDeclarations]: Found specification of procedure is_10_up [2022-11-23 14:43:54,653 INFO L138 BoogieDeclarations]: Found implementation of procedure is_10_up [2022-11-23 14:43:54,654 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~structbegin~int~structend~~TO~int [2022-11-23 14:43:54,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~structbegin~int~structend~~TO~int [2022-11-23 14:43:54,654 INFO L130 BoogieDeclarations]: Found specification of procedure pci_write_config_byte [2022-11-23 14:43:54,654 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_write_config_byte [2022-11-23 14:43:54,654 INFO L130 BoogieDeclarations]: Found specification of procedure is_anc_capable [2022-11-23 14:43:54,654 INFO L138 BoogieDeclarations]: Found implementation of procedure is_anc_capable [2022-11-23 14:43:54,671 INFO L130 BoogieDeclarations]: Found specification of procedure type1_infoblock [2022-11-23 14:43:54,675 INFO L138 BoogieDeclarations]: Found implementation of procedure type1_infoblock [2022-11-23 14:43:54,675 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-11-23 14:43:54,675 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-11-23 14:43:54,675 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2022-11-23 14:43:54,675 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2022-11-23 14:43:54,675 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_request_irq [2022-11-23 14:43:54,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_request_irq [2022-11-23 14:43:54,676 INFO L130 BoogieDeclarations]: Found specification of procedure dc21140_infoleaf [2022-11-23 14:43:54,676 INFO L138 BoogieDeclarations]: Found implementation of procedure dc21140_infoleaf [2022-11-23 14:43:54,676 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2022-11-23 14:43:54,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2022-11-23 14:43:54,679 INFO L130 BoogieDeclarations]: Found specification of procedure outl [2022-11-23 14:43:54,679 INFO L138 BoogieDeclarations]: Found implementation of procedure outl [2022-11-23 14:43:54,679 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_queue_pkt [2022-11-23 14:43:54,679 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_queue_pkt [2022-11-23 14:43:54,679 INFO L130 BoogieDeclarations]: Found specification of procedure test_media [2022-11-23 14:43:54,680 INFO L138 BoogieDeclarations]: Found implementation of procedure test_media [2022-11-23 14:43:54,680 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_free_tx_buffs [2022-11-23 14:43:54,680 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_free_tx_buffs [2022-11-23 14:43:54,680 INFO L130 BoogieDeclarations]: Found specification of procedure __skb_insert [2022-11-23 14:43:54,680 INFO L138 BoogieDeclarations]: Found implementation of procedure __skb_insert [2022-11-23 14:43:54,680 INFO L130 BoogieDeclarations]: Found specification of procedure dma_free_attrs [2022-11-23 14:43:54,680 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_free_attrs [2022-11-23 14:43:54,680 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2022-11-23 14:43:54,680 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2022-11-23 14:43:54,681 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2022-11-23 14:43:54,681 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2022-11-23 14:43:54,681 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_init [2022-11-23 14:43:54,681 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_init [2022-11-23 14:43:54,681 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2022-11-23 14:43:54,681 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2022-11-23 14:43:54,681 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_73 [2022-11-23 14:43:54,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_73 [2022-11-23 14:43:54,682 INFO L130 BoogieDeclarations]: Found specification of procedure dc21041_infoleaf [2022-11-23 14:43:54,682 INFO L138 BoogieDeclarations]: Found implementation of procedure dc21041_infoleaf [2022-11-23 14:43:54,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 14:43:54,682 INFO L130 BoogieDeclarations]: Found specification of procedure srom_exec [2022-11-23 14:43:54,682 INFO L138 BoogieDeclarations]: Found implementation of procedure srom_exec [2022-11-23 14:43:54,682 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-23 14:43:54,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-23 14:43:54,682 INFO L130 BoogieDeclarations]: Found specification of procedure gep_wr [2022-11-23 14:43:54,682 INFO L138 BoogieDeclarations]: Found implementation of procedure gep_wr [2022-11-23 14:43:54,683 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2022-11-23 14:43:54,683 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2022-11-23 14:43:54,683 INFO L130 BoogieDeclarations]: Found specification of procedure sendto_srom [2022-11-23 14:43:54,683 INFO L138 BoogieDeclarations]: Found implementation of procedure sendto_srom [2022-11-23 14:43:54,683 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2022-11-23 14:43:54,683 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2022-11-23 14:43:54,683 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_get_cache [2022-11-23 14:43:54,683 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_get_cache [2022-11-23 14:43:54,684 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_suspect_state [2022-11-23 14:43:54,684 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_suspect_state [2022-11-23 14:43:54,684 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_dbg_mii [2022-11-23 14:43:54,684 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_dbg_mii [2022-11-23 14:43:54,684 INFO L130 BoogieDeclarations]: Found specification of procedure compact_infoblock [2022-11-23 14:43:54,684 INFO L138 BoogieDeclarations]: Found implementation of procedure compact_infoblock [2022-11-23 14:43:54,684 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2022-11-23 14:43:54,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2022-11-23 14:43:54,684 INFO L130 BoogieDeclarations]: Found specification of procedure gep_rd [2022-11-23 14:43:54,685 INFO L138 BoogieDeclarations]: Found implementation of procedure gep_rd [2022-11-23 14:43:54,685 INFO L130 BoogieDeclarations]: Found specification of procedure mii_address [2022-11-23 14:43:54,685 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_address [2022-11-23 14:43:54,685 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_free_tx_buff [2022-11-23 14:43:54,685 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_free_tx_buff [2022-11-23 14:43:54,685 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_setup_intr [2022-11-23 14:43:54,685 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_setup_intr [2022-11-23 14:43:54,685 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_save_skbs [2022-11-23 14:43:54,686 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_save_skbs [2022-11-23 14:43:54,686 INFO L130 BoogieDeclarations]: Found specification of procedure dc2114x_autoconf [2022-11-23 14:43:54,686 INFO L138 BoogieDeclarations]: Found implementation of procedure dc2114x_autoconf [2022-11-23 14:43:54,687 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2022-11-23 14:43:54,687 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2022-11-23 14:43:54,687 INFO L130 BoogieDeclarations]: Found specification of procedure srom_map_media [2022-11-23 14:43:54,687 INFO L138 BoogieDeclarations]: Found implementation of procedure srom_map_media [2022-11-23 14:43:54,687 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_strncmp [2022-11-23 14:43:54,687 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_strncmp [2022-11-23 14:43:54,687 INFO L130 BoogieDeclarations]: Found specification of procedure inl [2022-11-23 14:43:54,687 INFO L138 BoogieDeclarations]: Found implementation of procedure inl [2022-11-23 14:43:54,688 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_close [2022-11-23 14:43:54,688 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_close [2022-11-23 14:43:54,688 INFO L130 BoogieDeclarations]: Found specification of procedure yawn [2022-11-23 14:43:54,688 INFO L138 BoogieDeclarations]: Found implementation of procedure yawn [2022-11-23 14:43:54,688 INFO L130 BoogieDeclarations]: Found specification of procedure mii_wdata [2022-11-23 14:43:54,688 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_wdata [2022-11-23 14:43:54,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:43:54,688 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2022-11-23 14:43:54,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2022-11-23 14:43:54,689 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2022-11-23 14:43:56,076 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:43:56,081 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:43:56,575 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-23 14:44:15,982 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:44:20,151 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:44:20,151 INFO L300 CfgBuilder]: Removed 18 assume(true) statements. [2022-11-23 14:44:20,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:44:20 BoogieIcfgContainer [2022-11-23 14:44:20,160 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:44:20,162 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:44:20,162 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:44:20,165 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:44:20,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:43:47" (1/3) ... [2022-11-23 14:44:20,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44dc4612 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:44:20, skipping insertion in model container [2022-11-23 14:44:20,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:53" (2/3) ... [2022-11-23 14:44:20,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44dc4612 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:44:20, skipping insertion in model container [2022-11-23 14:44:20,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:44:20" (3/3) ... [2022-11-23 14:44:20,169 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-de4x5.cil.i [2022-11-23 14:44:20,189 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:44:20,189 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-11-23 14:44:20,309 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:44:20,315 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;@3a939bec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:44:20,315 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-23 14:44:20,331 INFO L276 IsEmpty]: Start isEmpty. Operand has 2945 states, 1835 states have (on average 1.3416893732970028) internal successors, (2462), 1912 states have internal predecessors, (2462), 972 states have call successors, (972), 151 states have call predecessors, (972), 150 states have return successors, (963), 949 states have call predecessors, (963), 963 states have call successors, (963) [2022-11-23 14:44:20,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-23 14:44:20,343 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:44:20,343 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:44:20,345 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)] === [2022-11-23 14:44:20,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:44:20,352 INFO L85 PathProgramCache]: Analyzing trace with hash 2127409165, now seen corresponding path program 1 times [2022-11-23 14:44:20,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:44:20,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560006933] [2022-11-23 14:44:20,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:44:20,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:44:20,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:44:21,618 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 14:44:21,619 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:44:21,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560006933] [2022-11-23 14:44:21,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560006933] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:44:21,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:44:21,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:44:21,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791063823] [2022-11-23 14:44:21,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:44:21,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:44:21,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:44:21,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:44:21,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:44:21,684 INFO L87 Difference]: Start difference. First operand has 2945 states, 1835 states have (on average 1.3416893732970028) internal successors, (2462), 1912 states have internal predecessors, (2462), 972 states have call successors, (972), 151 states have call predecessors, (972), 150 states have return successors, (963), 949 states have call predecessors, (963), 963 states have call successors, (963) Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-23 14:44:23,763 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:44:30,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:44:32,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:44:32,686 INFO L93 Difference]: Finished difference Result 5824 states and 8875 transitions. [2022-11-23 14:44:32,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:44:32,690 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 35 [2022-11-23 14:44:32,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:44:32,743 INFO L225 Difference]: With dead ends: 5824 [2022-11-23 14:44:32,744 INFO L226 Difference]: Without dead ends: 2885 [2022-11-23 14:44:32,783 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 [2022-11-23 14:44:32,786 INFO L413 NwaCegarLoop]: 3806 mSDtfsCounter, 4277 mSDsluCounter, 7598 mSDsCounter, 0 mSdLazyCounter, 1475 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4290 SdHoareTripleChecker+Valid, 11404 SdHoareTripleChecker+Invalid, 1477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1475 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:44:32,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4290 Valid, 11404 Invalid, 1477 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 1475 Invalid, 1 Unknown, 0 Unchecked, 10.4s Time] [2022-11-23 14:44:32,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2885 states. [2022-11-23 14:44:33,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2885 to 2885. [2022-11-23 14:44:33,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2885 states, 1785 states have (on average 1.3355742296918767) internal successors, (2384), 1843 states have internal predecessors, (2384), 947 states have call successors, (947), 151 states have call predecessors, (947), 150 states have return successors, (944), 930 states have call predecessors, (944), 944 states have call successors, (944) [2022-11-23 14:44:33,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2885 states to 2885 states and 4275 transitions. [2022-11-23 14:44:33,200 INFO L78 Accepts]: Start accepts. Automaton has 2885 states and 4275 transitions. Word has length 35 [2022-11-23 14:44:33,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:44:33,202 INFO L495 AbstractCegarLoop]: Abstraction has 2885 states and 4275 transitions. [2022-11-23 14:44:33,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-23 14:44:33,203 INFO L276 IsEmpty]: Start isEmpty. Operand 2885 states and 4275 transitions. [2022-11-23 14:44:33,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-23 14:44:33,207 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:44:33,208 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:44:33,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:44:33,208 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 14:44:33,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:44:33,209 INFO L85 PathProgramCache]: Analyzing trace with hash 300586140, now seen corresponding path program 1 times [2022-11-23 14:44:33,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:44:33,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166019809] [2022-11-23 14:44:33,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:44:33,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:44:33,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:44:33,888 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 14:44:33,889 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:44:33,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166019809] [2022-11-23 14:44:33,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166019809] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:44:33,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:44:33,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:44:33,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613854300] [2022-11-23 14:44:33,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:44:33,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:44:33,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:44:33,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:44:33,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:44:33,894 INFO L87 Difference]: Start difference. First operand 2885 states and 4275 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 14:44:35,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:44:43,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:44:43,393 INFO L93 Difference]: Finished difference Result 2891 states and 4280 transitions. [2022-11-23 14:44:43,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:44:43,394 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 41 [2022-11-23 14:44:43,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:44:43,421 INFO L225 Difference]: With dead ends: 2891 [2022-11-23 14:44:43,421 INFO L226 Difference]: Without dead ends: 2889 [2022-11-23 14:44:43,425 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 [2022-11-23 14:44:43,426 INFO L413 NwaCegarLoop]: 3786 mSDtfsCounter, 4249 mSDsluCounter, 7552 mSDsCounter, 0 mSdLazyCounter, 1475 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4260 SdHoareTripleChecker+Valid, 11338 SdHoareTripleChecker+Invalid, 1477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1475 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:44:43,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4260 Valid, 11338 Invalid, 1477 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 1475 Invalid, 1 Unknown, 0 Unchecked, 9.1s Time] [2022-11-23 14:44:43,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2889 states. [2022-11-23 14:44:43,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2889 to 2889. [2022-11-23 14:44:43,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2889 states, 1788 states have (on average 1.3350111856823266) internal successors, (2387), 1846 states have internal predecessors, (2387), 947 states have call successors, (947), 152 states have call predecessors, (947), 151 states have return successors, (944), 930 states have call predecessors, (944), 944 states have call successors, (944) [2022-11-23 14:44:43,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2889 states to 2889 states and 4278 transitions. [2022-11-23 14:44:43,645 INFO L78 Accepts]: Start accepts. Automaton has 2889 states and 4278 transitions. Word has length 41 [2022-11-23 14:44:43,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:44:43,645 INFO L495 AbstractCegarLoop]: Abstraction has 2889 states and 4278 transitions. [2022-11-23 14:44:43,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 14:44:43,649 INFO L276 IsEmpty]: Start isEmpty. Operand 2889 states and 4278 transitions. [2022-11-23 14:44:43,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-23 14:44:43,661 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:44:43,661 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:44:43,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 14:44:43,662 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 14:44:43,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:44:43,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1515517261, now seen corresponding path program 1 times [2022-11-23 14:44:43,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:44:43,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565365426] [2022-11-23 14:44:43,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:44:43,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:44:43,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:44:44,606 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-23 14:44:44,607 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:44:44,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565365426] [2022-11-23 14:44:44,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565365426] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:44:44,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:44:44,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:44:44,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773878311] [2022-11-23 14:44:44,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:44:44,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:44:44,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:44:44,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:44:44,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:44:44,611 INFO L87 Difference]: Start difference. First operand 2889 states and 4278 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 14:44:46,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:44:53,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:44:53,982 INFO L93 Difference]: Finished difference Result 2895 states and 4283 transitions. [2022-11-23 14:44:53,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:44:53,983 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 45 [2022-11-23 14:44:53,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:44:54,013 INFO L225 Difference]: With dead ends: 2895 [2022-11-23 14:44:54,013 INFO L226 Difference]: Without dead ends: 2893 [2022-11-23 14:44:54,017 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 [2022-11-23 14:44:54,018 INFO L413 NwaCegarLoop]: 3786 mSDtfsCounter, 4250 mSDsluCounter, 7552 mSDsCounter, 0 mSdLazyCounter, 1475 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4260 SdHoareTripleChecker+Valid, 11338 SdHoareTripleChecker+Invalid, 1477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1475 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:44:54,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4260 Valid, 11338 Invalid, 1477 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 1475 Invalid, 1 Unknown, 0 Unchecked, 9.0s Time] [2022-11-23 14:44:54,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2893 states. [2022-11-23 14:44:54,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2893 to 2893. [2022-11-23 14:44:54,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2893 states, 1791 states have (on average 1.3344500279173646) internal successors, (2390), 1849 states have internal predecessors, (2390), 947 states have call successors, (947), 153 states have call predecessors, (947), 152 states have return successors, (944), 930 states have call predecessors, (944), 944 states have call successors, (944) [2022-11-23 14:44:54,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2893 states to 2893 states and 4281 transitions. [2022-11-23 14:44:54,330 INFO L78 Accepts]: Start accepts. Automaton has 2893 states and 4281 transitions. Word has length 45 [2022-11-23 14:44:54,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:44:54,331 INFO L495 AbstractCegarLoop]: Abstraction has 2893 states and 4281 transitions. [2022-11-23 14:44:54,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 14:44:54,332 INFO L276 IsEmpty]: Start isEmpty. Operand 2893 states and 4281 transitions. [2022-11-23 14:44:54,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-23 14:44:54,335 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:44:54,335 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:44:54,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 14:44:54,336 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 14:44:54,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:44:54,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1414077239, now seen corresponding path program 1 times [2022-11-23 14:44:54,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:44:54,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261464039] [2022-11-23 14:44:54,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:44:54,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:44:54,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:44:54,982 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-23 14:44:54,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:44:54,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261464039] [2022-11-23 14:44:54,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261464039] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:44:54,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:44:54,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:44:54,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107068681] [2022-11-23 14:44:54,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:44:54,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:44:54,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:44:54,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:44:54,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:44:54,986 INFO L87 Difference]: Start difference. First operand 2893 states and 4281 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-23 14:44:57,040 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:45:02,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:45:02,963 INFO L93 Difference]: Finished difference Result 2899 states and 4286 transitions. [2022-11-23 14:45:02,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:45:02,965 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 50 [2022-11-23 14:45:02,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:45:02,992 INFO L225 Difference]: With dead ends: 2899 [2022-11-23 14:45:02,993 INFO L226 Difference]: Without dead ends: 2897 [2022-11-23 14:45:02,996 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 [2022-11-23 14:45:02,998 INFO L413 NwaCegarLoop]: 3786 mSDtfsCounter, 4250 mSDsluCounter, 7552 mSDsCounter, 0 mSdLazyCounter, 1475 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4259 SdHoareTripleChecker+Valid, 11338 SdHoareTripleChecker+Invalid, 1477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1475 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:45:02,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4259 Valid, 11338 Invalid, 1477 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 1475 Invalid, 1 Unknown, 0 Unchecked, 7.6s Time] [2022-11-23 14:45:03,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2897 states. [2022-11-23 14:45:03,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2897 to 2897. [2022-11-23 14:45:03,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2897 states, 1794 states have (on average 1.3338907469342252) internal successors, (2393), 1852 states have internal predecessors, (2393), 947 states have call successors, (947), 154 states have call predecessors, (947), 153 states have return successors, (944), 930 states have call predecessors, (944), 944 states have call successors, (944) [2022-11-23 14:45:03,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2897 states to 2897 states and 4284 transitions. [2022-11-23 14:45:03,313 INFO L78 Accepts]: Start accepts. Automaton has 2897 states and 4284 transitions. Word has length 50 [2022-11-23 14:45:03,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:45:03,314 INFO L495 AbstractCegarLoop]: Abstraction has 2897 states and 4284 transitions. [2022-11-23 14:45:03,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-23 14:45:03,315 INFO L276 IsEmpty]: Start isEmpty. Operand 2897 states and 4284 transitions. [2022-11-23 14:45:03,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-23 14:45:03,316 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:45:03,316 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:45:03,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 14:45:03,317 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)] === [2022-11-23 14:45:03,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:45:03,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1192732019, now seen corresponding path program 1 times [2022-11-23 14:45:03,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:45:03,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208703961] [2022-11-23 14:45:03,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:45:03,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:45:03,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:45:04,053 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-23 14:45:04,053 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:45:04,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208703961] [2022-11-23 14:45:04,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208703961] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:45:04,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:45:04,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:45:04,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639348827] [2022-11-23 14:45:04,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:45:04,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:45:04,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:45:04,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:45:04,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:45:04,057 INFO L87 Difference]: Start difference. First operand 2897 states and 4284 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-23 14:45:06,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:45:13,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:45:13,755 INFO L93 Difference]: Finished difference Result 2903 states and 4289 transitions. [2022-11-23 14:45:13,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:45:13,756 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 55 [2022-11-23 14:45:13,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:45:13,782 INFO L225 Difference]: With dead ends: 2903 [2022-11-23 14:45:13,782 INFO L226 Difference]: Without dead ends: 2901 [2022-11-23 14:45:13,786 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 [2022-11-23 14:45:13,787 INFO L413 NwaCegarLoop]: 3786 mSDtfsCounter, 4250 mSDsluCounter, 7552 mSDsCounter, 0 mSdLazyCounter, 1475 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4258 SdHoareTripleChecker+Valid, 11338 SdHoareTripleChecker+Invalid, 1477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1475 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:45:13,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4258 Valid, 11338 Invalid, 1477 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 1475 Invalid, 1 Unknown, 0 Unchecked, 9.3s Time] [2022-11-23 14:45:13,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2901 states. [2022-11-23 14:45:14,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2901 to 2901. [2022-11-23 14:45:14,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2901 states, 1797 states have (on average 1.3333333333333333) internal successors, (2396), 1855 states have internal predecessors, (2396), 947 states have call successors, (947), 155 states have call predecessors, (947), 154 states have return successors, (944), 930 states have call predecessors, (944), 944 states have call successors, (944) [2022-11-23 14:45:14,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2901 states to 2901 states and 4287 transitions. [2022-11-23 14:45:14,272 INFO L78 Accepts]: Start accepts. Automaton has 2901 states and 4287 transitions. Word has length 55 [2022-11-23 14:45:14,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:45:14,273 INFO L495 AbstractCegarLoop]: Abstraction has 2901 states and 4287 transitions. [2022-11-23 14:45:14,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-23 14:45:14,273 INFO L276 IsEmpty]: Start isEmpty. Operand 2901 states and 4287 transitions. [2022-11-23 14:45:14,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-23 14:45:14,274 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:45:14,274 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:45:14,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 14:45:14,275 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)] === [2022-11-23 14:45:14,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:45:14,276 INFO L85 PathProgramCache]: Analyzing trace with hash -580906596, now seen corresponding path program 1 times [2022-11-23 14:45:14,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:45:14,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410105297] [2022-11-23 14:45:14,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:45:14,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:45:14,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:45:14,840 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-23 14:45:14,841 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:45:14,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410105297] [2022-11-23 14:45:14,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410105297] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:45:14,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:45:14,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:45:14,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81211634] [2022-11-23 14:45:14,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:45:14,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:45:14,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:45:14,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:45:14,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:45:14,844 INFO L87 Difference]: Start difference. First operand 2901 states and 4287 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-23 14:45:16,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:45:22,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:45:22,680 INFO L93 Difference]: Finished difference Result 2907 states and 4292 transitions. [2022-11-23 14:45:22,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:45:22,681 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 61 [2022-11-23 14:45:22,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:45:22,701 INFO L225 Difference]: With dead ends: 2907 [2022-11-23 14:45:22,701 INFO L226 Difference]: Without dead ends: 2905 [2022-11-23 14:45:22,703 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 [2022-11-23 14:45:22,704 INFO L413 NwaCegarLoop]: 3786 mSDtfsCounter, 4249 mSDsluCounter, 7552 mSDsCounter, 0 mSdLazyCounter, 1475 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4256 SdHoareTripleChecker+Valid, 11338 SdHoareTripleChecker+Invalid, 1477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1475 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:45:22,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4256 Valid, 11338 Invalid, 1477 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 1475 Invalid, 1 Unknown, 0 Unchecked, 7.4s Time] [2022-11-23 14:45:22,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2905 states. [2022-11-23 14:45:22,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2905 to 2905. [2022-11-23 14:45:22,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2905 states, 1800 states have (on average 1.3327777777777778) internal successors, (2399), 1858 states have internal predecessors, (2399), 947 states have call successors, (947), 156 states have call predecessors, (947), 155 states have return successors, (944), 930 states have call predecessors, (944), 944 states have call successors, (944) [2022-11-23 14:45:22,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2905 states to 2905 states and 4290 transitions. [2022-11-23 14:45:22,952 INFO L78 Accepts]: Start accepts. Automaton has 2905 states and 4290 transitions. Word has length 61 [2022-11-23 14:45:22,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:45:22,953 INFO L495 AbstractCegarLoop]: Abstraction has 2905 states and 4290 transitions. [2022-11-23 14:45:22,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-23 14:45:22,955 INFO L276 IsEmpty]: Start isEmpty. Operand 2905 states and 4290 transitions. [2022-11-23 14:45:22,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-23 14:45:22,956 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:45:22,956 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:45:22,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 14:45:22,957 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)] === [2022-11-23 14:45:22,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:45:22,957 INFO L85 PathProgramCache]: Analyzing trace with hash -773857331, now seen corresponding path program 1 times [2022-11-23 14:45:22,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:45:22,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487128064] [2022-11-23 14:45:22,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:45:22,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:45:23,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:45:23,464 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-23 14:45:23,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:45:23,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487128064] [2022-11-23 14:45:23,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487128064] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:45:23,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:45:23,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:45:23,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585390300] [2022-11-23 14:45:23,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:45:23,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:45:23,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:45:23,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:45:23,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:45:23,471 INFO L87 Difference]: Start difference. First operand 2905 states and 4290 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 14:45:25,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:45:32,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:45:32,315 INFO L93 Difference]: Finished difference Result 2911 states and 4295 transitions. [2022-11-23 14:45:32,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:45:32,316 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 65 [2022-11-23 14:45:32,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:45:32,336 INFO L225 Difference]: With dead ends: 2911 [2022-11-23 14:45:32,337 INFO L226 Difference]: Without dead ends: 2909 [2022-11-23 14:45:32,339 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 [2022-11-23 14:45:32,340 INFO L413 NwaCegarLoop]: 3786 mSDtfsCounter, 4250 mSDsluCounter, 7552 mSDsCounter, 0 mSdLazyCounter, 1475 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4256 SdHoareTripleChecker+Valid, 11338 SdHoareTripleChecker+Invalid, 1477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1475 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:45:32,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4256 Valid, 11338 Invalid, 1477 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 1475 Invalid, 1 Unknown, 0 Unchecked, 8.5s Time] [2022-11-23 14:45:32,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2909 states. [2022-11-23 14:45:32,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2909 to 2909. [2022-11-23 14:45:32,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2909 states, 1803 states have (on average 1.3322240709927897) internal successors, (2402), 1861 states have internal predecessors, (2402), 947 states have call successors, (947), 157 states have call predecessors, (947), 156 states have return successors, (944), 930 states have call predecessors, (944), 944 states have call successors, (944) [2022-11-23 14:45:32,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2909 states to 2909 states and 4293 transitions. [2022-11-23 14:45:32,650 INFO L78 Accepts]: Start accepts. Automaton has 2909 states and 4293 transitions. Word has length 65 [2022-11-23 14:45:32,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:45:32,651 INFO L495 AbstractCegarLoop]: Abstraction has 2909 states and 4293 transitions. [2022-11-23 14:45:32,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 14:45:32,651 INFO L276 IsEmpty]: Start isEmpty. Operand 2909 states and 4293 transitions. [2022-11-23 14:45:32,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-23 14:45:32,652 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:45:32,652 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:45:32,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 14:45:32,653 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)] === [2022-11-23 14:45:32,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:45:32,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1409165340, now seen corresponding path program 1 times [2022-11-23 14:45:32,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:45:32,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691345675] [2022-11-23 14:45:32,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:45:32,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:45:32,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:45:33,162 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-23 14:45:33,162 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:45:33,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691345675] [2022-11-23 14:45:33,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691345675] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:45:33,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:45:33,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:45:33,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882500008] [2022-11-23 14:45:33,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:45:33,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:45:33,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:45:33,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:45:33,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:45:33,165 INFO L87 Difference]: Start difference. First operand 2909 states and 4293 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-23 14:45:35,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:45:42,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:45:42,652 INFO L93 Difference]: Finished difference Result 3125 states and 4555 transitions. [2022-11-23 14:45:42,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:45:42,653 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 71 [2022-11-23 14:45:42,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:45:42,679 INFO L225 Difference]: With dead ends: 3125 [2022-11-23 14:45:42,679 INFO L226 Difference]: Without dead ends: 3123 [2022-11-23 14:45:42,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:45:42,683 INFO L413 NwaCegarLoop]: 3886 mSDtfsCounter, 4031 mSDsluCounter, 8159 mSDsCounter, 0 mSdLazyCounter, 1552 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4036 SdHoareTripleChecker+Valid, 12045 SdHoareTripleChecker+Invalid, 1555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1552 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:45:42,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4036 Valid, 12045 Invalid, 1555 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 1552 Invalid, 1 Unknown, 0 Unchecked, 9.1s Time] [2022-11-23 14:45:42,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3123 states. [2022-11-23 14:45:42,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3123 to 3117. [2022-11-23 14:45:42,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3117 states, 1922 states have (on average 1.3241415192507804) internal successors, (2545), 1987 states have internal predecessors, (2545), 1003 states have call successors, (1003), 193 states have call predecessors, (1003), 189 states have return successors, (1001), 980 states have call predecessors, (1001), 1000 states have call successors, (1001) [2022-11-23 14:45:43,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3117 states to 3117 states and 4549 transitions. [2022-11-23 14:45:43,012 INFO L78 Accepts]: Start accepts. Automaton has 3117 states and 4549 transitions. Word has length 71 [2022-11-23 14:45:43,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:45:43,012 INFO L495 AbstractCegarLoop]: Abstraction has 3117 states and 4549 transitions. [2022-11-23 14:45:43,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-23 14:45:43,013 INFO L276 IsEmpty]: Start isEmpty. Operand 3117 states and 4549 transitions. [2022-11-23 14:45:43,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-23 14:45:43,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:45:43,015 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:45:43,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 14:45:43,016 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)] === [2022-11-23 14:45:43,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:45:43,016 INFO L85 PathProgramCache]: Analyzing trace with hash 130650650, now seen corresponding path program 1 times [2022-11-23 14:45:43,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:45:43,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359709043] [2022-11-23 14:45:43,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:45:43,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:45:43,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:45:43,532 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-11-23 14:45:43,532 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:45:43,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359709043] [2022-11-23 14:45:43,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359709043] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:45:43,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:45:43,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:45:43,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127222883] [2022-11-23 14:45:43,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:45:43,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:45:43,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:45:43,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:45:43,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:45:43,536 INFO L87 Difference]: Start difference. First operand 3117 states and 4549 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-23 14:45:45,585 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:45:52,563 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:45:54,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:45:54,142 INFO L93 Difference]: Finished difference Result 3564 states and 5128 transitions. [2022-11-23 14:45:54,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:45:54,143 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 76 [2022-11-23 14:45:54,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:45:54,169 INFO L225 Difference]: With dead ends: 3564 [2022-11-23 14:45:54,170 INFO L226 Difference]: Without dead ends: 3562 [2022-11-23 14:45:54,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:45:54,174 INFO L413 NwaCegarLoop]: 3920 mSDtfsCounter, 4248 mSDsluCounter, 8224 mSDsCounter, 0 mSdLazyCounter, 1566 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4254 SdHoareTripleChecker+Valid, 12144 SdHoareTripleChecker+Invalid, 1569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1566 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:45:54,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4254 Valid, 12144 Invalid, 1569 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 1566 Invalid, 2 Unknown, 0 Unchecked, 10.1s Time] [2022-11-23 14:45:54,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3562 states. [2022-11-23 14:45:54,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3562 to 3554. [2022-11-23 14:45:54,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3554 states, 2176 states have (on average 1.3152573529411764) internal successors, (2862), 2255 states have internal predecessors, (2862), 1129 states have call successors, (1129), 253 states have call predecessors, (1129), 246 states have return successors, (1128), 1097 states have call predecessors, (1128), 1126 states have call successors, (1128) [2022-11-23 14:45:54,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3554 states to 3554 states and 5119 transitions. [2022-11-23 14:45:54,563 INFO L78 Accepts]: Start accepts. Automaton has 3554 states and 5119 transitions. Word has length 76 [2022-11-23 14:45:54,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:45:54,564 INFO L495 AbstractCegarLoop]: Abstraction has 3554 states and 5119 transitions. [2022-11-23 14:45:54,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-23 14:45:54,564 INFO L276 IsEmpty]: Start isEmpty. Operand 3554 states and 5119 transitions. [2022-11-23 14:45:54,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-23 14:45:54,573 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:45:54,573 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:45:54,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 14:45:54,573 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)] === [2022-11-23 14:45:54,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:45:54,574 INFO L85 PathProgramCache]: Analyzing trace with hash -649867620, now seen corresponding path program 1 times [2022-11-23 14:45:54,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:45:54,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760131339] [2022-11-23 14:45:54,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:45:54,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:45:54,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:45:55,066 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-23 14:45:55,067 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:45:55,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760131339] [2022-11-23 14:45:55,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760131339] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:45:55,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:45:55,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:45:55,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155587296] [2022-11-23 14:45:55,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:45:55,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:45:55,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:45:55,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:45:55,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:45:55,070 INFO L87 Difference]: Start difference. First operand 3554 states and 5119 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-23 14:45:57,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:46:02,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:46:03,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:46:03,996 INFO L93 Difference]: Finished difference Result 3560 states and 5124 transitions. [2022-11-23 14:46:03,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:46:03,997 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 81 [2022-11-23 14:46:03,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:46:04,019 INFO L225 Difference]: With dead ends: 3560 [2022-11-23 14:46:04,019 INFO L226 Difference]: Without dead ends: 3558 [2022-11-23 14:46:04,023 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 [2022-11-23 14:46:04,023 INFO L413 NwaCegarLoop]: 3786 mSDtfsCounter, 4249 mSDsluCounter, 7552 mSDsCounter, 0 mSdLazyCounter, 1475 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4252 SdHoareTripleChecker+Valid, 11338 SdHoareTripleChecker+Invalid, 1477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1475 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:46:04,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4252 Valid, 11338 Invalid, 1477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1475 Invalid, 1 Unknown, 0 Unchecked, 8.5s Time] [2022-11-23 14:46:04,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3558 states. [2022-11-23 14:46:04,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3558 to 3558. [2022-11-23 14:46:04,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3558 states, 2179 states have (on average 1.314823313446535) internal successors, (2865), 2258 states have internal predecessors, (2865), 1129 states have call successors, (1129), 254 states have call predecessors, (1129), 247 states have return successors, (1128), 1097 states have call predecessors, (1128), 1126 states have call successors, (1128) [2022-11-23 14:46:04,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3558 states to 3558 states and 5122 transitions. [2022-11-23 14:46:04,417 INFO L78 Accepts]: Start accepts. Automaton has 3558 states and 5122 transitions. Word has length 81 [2022-11-23 14:46:04,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:46:04,417 INFO L495 AbstractCegarLoop]: Abstraction has 3558 states and 5122 transitions. [2022-11-23 14:46:04,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-23 14:46:04,418 INFO L276 IsEmpty]: Start isEmpty. Operand 3558 states and 5122 transitions. [2022-11-23 14:46:04,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-23 14:46:04,421 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:46:04,422 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:46:04,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 14:46:04,422 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 14:46:04,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:46:04,423 INFO L85 PathProgramCache]: Analyzing trace with hash 173754957, now seen corresponding path program 1 times [2022-11-23 14:46:04,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:46:04,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028882565] [2022-11-23 14:46:04,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:46:04,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:46:04,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:46:05,015 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2022-11-23 14:46:05,015 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:46:05,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028882565] [2022-11-23 14:46:05,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028882565] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:46:05,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:46:05,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:46:05,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532388758] [2022-11-23 14:46:05,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:46:05,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:46:05,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:46:05,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:46:05,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:46:05,018 INFO L87 Difference]: Start difference. First operand 3558 states and 5122 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (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) [2022-11-23 14:46:07,071 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:46:13,467 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:46:14,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:46:14,079 INFO L93 Difference]: Finished difference Result 3564 states and 5127 transitions. [2022-11-23 14:46:14,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:46:14,080 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (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 85 [2022-11-23 14:46:14,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:46:14,099 INFO L225 Difference]: With dead ends: 3564 [2022-11-23 14:46:14,100 INFO L226 Difference]: Without dead ends: 3562 [2022-11-23 14:46:14,103 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 [2022-11-23 14:46:14,104 INFO L413 NwaCegarLoop]: 3786 mSDtfsCounter, 4250 mSDsluCounter, 7552 mSDsCounter, 0 mSdLazyCounter, 1475 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4252 SdHoareTripleChecker+Valid, 11338 SdHoareTripleChecker+Invalid, 1477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1475 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:46:14,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4252 Valid, 11338 Invalid, 1477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1475 Invalid, 1 Unknown, 0 Unchecked, 8.6s Time] [2022-11-23 14:46:14,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3562 states. [2022-11-23 14:46:14,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3562 to 3562. [2022-11-23 14:46:14,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3562 states, 2182 states have (on average 1.314390467461045) internal successors, (2868), 2261 states have internal predecessors, (2868), 1129 states have call successors, (1129), 255 states have call predecessors, (1129), 248 states have return successors, (1128), 1097 states have call predecessors, (1128), 1126 states have call successors, (1128) [2022-11-23 14:46:14,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3562 states to 3562 states and 5125 transitions. [2022-11-23 14:46:14,491 INFO L78 Accepts]: Start accepts. Automaton has 3562 states and 5125 transitions. Word has length 85 [2022-11-23 14:46:14,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:46:14,492 INFO L495 AbstractCegarLoop]: Abstraction has 3562 states and 5125 transitions. [2022-11-23 14:46:14,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (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) [2022-11-23 14:46:14,493 INFO L276 IsEmpty]: Start isEmpty. Operand 3562 states and 5125 transitions. [2022-11-23 14:46:14,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-23 14:46:14,494 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:46:14,495 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:46:14,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 14:46:14,495 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)] === [2022-11-23 14:46:14,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:46:14,496 INFO L85 PathProgramCache]: Analyzing trace with hash 474377673, now seen corresponding path program 1 times [2022-11-23 14:46:14,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:46:14,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147802728] [2022-11-23 14:46:14,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:46:14,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:46:14,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:46:15,021 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-11-23 14:46:15,021 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:46:15,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147802728] [2022-11-23 14:46:15,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147802728] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:46:15,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:46:15,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:46:15,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991280091] [2022-11-23 14:46:15,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:46:15,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:46:15,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:46:15,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:46:15,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:46:15,024 INFO L87 Difference]: Start difference. First operand 3562 states and 5125 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 14:46:17,077 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:46:23,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:46:23,434 INFO L93 Difference]: Finished difference Result 3568 states and 5130 transitions. [2022-11-23 14:46:23,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:46:23,435 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 90 [2022-11-23 14:46:23,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:46:23,454 INFO L225 Difference]: With dead ends: 3568 [2022-11-23 14:46:23,454 INFO L226 Difference]: Without dead ends: 3564 [2022-11-23 14:46:23,457 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 [2022-11-23 14:46:23,458 INFO L413 NwaCegarLoop]: 3786 mSDtfsCounter, 4250 mSDsluCounter, 7552 mSDsCounter, 0 mSdLazyCounter, 1475 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4251 SdHoareTripleChecker+Valid, 11338 SdHoareTripleChecker+Invalid, 1477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1475 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:46:23,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4251 Valid, 11338 Invalid, 1477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1475 Invalid, 1 Unknown, 0 Unchecked, 7.9s Time] [2022-11-23 14:46:23,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3564 states. [2022-11-23 14:46:23,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3564 to 3564. [2022-11-23 14:46:23,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3564 states, 2184 states have (on average 1.3136446886446886) internal successors, (2869), 2262 states have internal predecessors, (2869), 1129 states have call successors, (1129), 256 states have call predecessors, (1129), 248 states have return successors, (1128), 1097 states have call predecessors, (1128), 1126 states have call successors, (1128) [2022-11-23 14:46:23,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3564 states to 3564 states and 5126 transitions. [2022-11-23 14:46:23,894 INFO L78 Accepts]: Start accepts. Automaton has 3564 states and 5126 transitions. Word has length 90 [2022-11-23 14:46:23,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:46:23,895 INFO L495 AbstractCegarLoop]: Abstraction has 3564 states and 5126 transitions. [2022-11-23 14:46:23,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 14:46:23,896 INFO L276 IsEmpty]: Start isEmpty. Operand 3564 states and 5126 transitions. [2022-11-23 14:46:23,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-23 14:46:23,897 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:46:23,898 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:46:23,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 14:46:23,898 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)] === [2022-11-23 14:46:23,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:46:23,899 INFO L85 PathProgramCache]: Analyzing trace with hash 311373709, now seen corresponding path program 1 times [2022-11-23 14:46:23,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:46:23,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847649498] [2022-11-23 14:46:23,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:46:23,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:46:24,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:46:24,374 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2022-11-23 14:46:24,374 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:46:24,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847649498] [2022-11-23 14:46:24,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847649498] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:46:24,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:46:24,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:46:24,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880474702] [2022-11-23 14:46:24,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:46:24,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:46:24,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:46:24,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:46:24,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:46:24,377 INFO L87 Difference]: Start difference. First operand 3564 states and 5126 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-23 14:46:26,432 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:46:33,812 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:46:35,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:46:35,216 INFO L93 Difference]: Finished difference Result 3564 states and 5126 transitions. [2022-11-23 14:46:35,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:46:35,217 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 95 [2022-11-23 14:46:35,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:46:35,234 INFO L225 Difference]: With dead ends: 3564 [2022-11-23 14:46:35,235 INFO L226 Difference]: Without dead ends: 3482 [2022-11-23 14:46:35,238 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 [2022-11-23 14:46:35,239 INFO L413 NwaCegarLoop]: 3784 mSDtfsCounter, 4246 mSDsluCounter, 7551 mSDsCounter, 0 mSdLazyCounter, 1470 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4246 SdHoareTripleChecker+Valid, 11335 SdHoareTripleChecker+Invalid, 1472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1470 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:46:35,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4246 Valid, 11335 Invalid, 1472 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 1470 Invalid, 1 Unknown, 0 Unchecked, 10.3s Time] [2022-11-23 14:46:35,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3482 states. [2022-11-23 14:46:35,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3482 to 3482. [2022-11-23 14:46:35,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3482 states, 2137 states have (on average 1.3191389798783342) internal successors, (2819), 2213 states have internal predecessors, (2819), 1107 states have call successors, (1107), 242 states have call predecessors, (1107), 236 states have return successors, (1109), 1078 states have call predecessors, (1109), 1107 states have call successors, (1109) [2022-11-23 14:46:35,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3482 states to 3482 states and 5035 transitions. [2022-11-23 14:46:35,677 INFO L78 Accepts]: Start accepts. Automaton has 3482 states and 5035 transitions. Word has length 95 [2022-11-23 14:46:35,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:46:35,678 INFO L495 AbstractCegarLoop]: Abstraction has 3482 states and 5035 transitions. [2022-11-23 14:46:35,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-23 14:46:35,678 INFO L276 IsEmpty]: Start isEmpty. Operand 3482 states and 5035 transitions. [2022-11-23 14:46:35,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-23 14:46:35,687 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:46:35,688 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:46:35,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-23 14:46:35,688 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 14:46:35,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:46:35,689 INFO L85 PathProgramCache]: Analyzing trace with hash 956154854, now seen corresponding path program 1 times [2022-11-23 14:46:35,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:46:35,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211480769] [2022-11-23 14:46:35,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:46:35,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:46:35,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:46:36,131 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-11-23 14:46:36,131 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:46:36,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211480769] [2022-11-23 14:46:36,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211480769] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:46:36,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:46:36,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:46:36,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127404221] [2022-11-23 14:46:36,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:46:36,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:46:36,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:46:36,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:46:36,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:46:36,134 INFO L87 Difference]: Start difference. First operand 3482 states and 5035 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-23 14:46:38,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:46:41,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:46:41,618 INFO L93 Difference]: Finished difference Result 6949 states and 10047 transitions. [2022-11-23 14:46:41,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:46:41,619 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 143 [2022-11-23 14:46:41,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:46:41,641 INFO L225 Difference]: With dead ends: 6949 [2022-11-23 14:46:41,641 INFO L226 Difference]: Without dead ends: 3481 [2022-11-23 14:46:41,665 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 [2022-11-23 14:46:41,666 INFO L413 NwaCegarLoop]: 3729 mSDtfsCounter, 4196 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4196 SdHoareTripleChecker+Valid, 3729 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:46:41,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4196 Valid, 3729 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 482 Invalid, 1 Unknown, 0 Unchecked, 5.0s Time] [2022-11-23 14:46:41,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3481 states. [2022-11-23 14:46:41,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3481 to 3481. [2022-11-23 14:46:41,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3481 states, 2136 states have (on average 1.3183520599250935) internal successors, (2816), 2212 states have internal predecessors, (2816), 1107 states have call successors, (1107), 242 states have call predecessors, (1107), 236 states have return successors, (1109), 1078 states have call predecessors, (1109), 1107 states have call successors, (1109) [2022-11-23 14:46:41,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3481 states to 3481 states and 5032 transitions. [2022-11-23 14:46:41,996 INFO L78 Accepts]: Start accepts. Automaton has 3481 states and 5032 transitions. Word has length 143 [2022-11-23 14:46:41,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:46:41,996 INFO L495 AbstractCegarLoop]: Abstraction has 3481 states and 5032 transitions. [2022-11-23 14:46:41,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-23 14:46:41,997 INFO L276 IsEmpty]: Start isEmpty. Operand 3481 states and 5032 transitions. [2022-11-23 14:46:42,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-23 14:46:42,007 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:46:42,007 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:46:42,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-23 14:46:42,008 INFO L420 AbstractCegarLoop]: === Iteration 15 === 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)] === [2022-11-23 14:46:42,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:46:42,009 INFO L85 PathProgramCache]: Analyzing trace with hash -2035524625, now seen corresponding path program 1 times [2022-11-23 14:46:42,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:46:42,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326973221] [2022-11-23 14:46:42,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:46:42,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:46:42,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:46:43,391 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-11-23 14:46:43,391 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:46:43,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326973221] [2022-11-23 14:46:43,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326973221] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:46:43,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:46:43,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:46:43,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544781944] [2022-11-23 14:46:43,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:46:43,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:46:43,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:46:43,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:46:43,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:46:43,395 INFO L87 Difference]: Start difference. First operand 3481 states and 5032 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-23 14:46:45,448 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:46:53,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:46:53,332 INFO L93 Difference]: Finished difference Result 3489 states and 5038 transitions. [2022-11-23 14:46:53,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:46:53,333 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 144 [2022-11-23 14:46:53,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:46:53,353 INFO L225 Difference]: With dead ends: 3489 [2022-11-23 14:46:53,353 INFO L226 Difference]: Without dead ends: 3487 [2022-11-23 14:46:53,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:46:53,357 INFO L413 NwaCegarLoop]: 3831 mSDtfsCounter, 3933 mSDsluCounter, 8067 mSDsCounter, 0 mSdLazyCounter, 1529 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3934 SdHoareTripleChecker+Valid, 11898 SdHoareTripleChecker+Invalid, 1532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1529 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:46:53,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3934 Valid, 11898 Invalid, 1532 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 1529 Invalid, 1 Unknown, 0 Unchecked, 9.4s Time] [2022-11-23 14:46:53,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3487 states. [2022-11-23 14:46:53,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3487 to 3481. [2022-11-23 14:46:53,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3481 states, 2136 states have (on average 1.3174157303370786) internal successors, (2814), 2212 states have internal predecessors, (2814), 1107 states have call successors, (1107), 242 states have call predecessors, (1107), 236 states have return successors, (1109), 1078 states have call predecessors, (1109), 1107 states have call successors, (1109) [2022-11-23 14:46:53,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3481 states to 3481 states and 5030 transitions. [2022-11-23 14:46:53,825 INFO L78 Accepts]: Start accepts. Automaton has 3481 states and 5030 transitions. Word has length 144 [2022-11-23 14:46:53,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:46:53,826 INFO L495 AbstractCegarLoop]: Abstraction has 3481 states and 5030 transitions. [2022-11-23 14:46:53,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-23 14:46:53,827 INFO L276 IsEmpty]: Start isEmpty. Operand 3481 states and 5030 transitions. [2022-11-23 14:46:53,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-11-23 14:46:53,855 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:46:53,856 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 7, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:46:53,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-23 14:46:53,856 INFO L420 AbstractCegarLoop]: === Iteration 16 === 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)] === [2022-11-23 14:46:53,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:46:53,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1748066367, now seen corresponding path program 1 times [2022-11-23 14:46:53,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:46:53,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150540603] [2022-11-23 14:46:53,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:46:53,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:46:54,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:46:54,894 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2022-11-23 14:46:54,894 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:46:54,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150540603] [2022-11-23 14:46:54,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150540603] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:46:54,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:46:54,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:46:54,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725841635] [2022-11-23 14:46:54,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:46:54,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:46:54,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:46:54,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:46:54,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:46:54,900 INFO L87 Difference]: Start difference. First operand 3481 states and 5030 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-23 14:46:56,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:47:06,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:47:06,143 INFO L93 Difference]: Finished difference Result 3487 states and 5035 transitions. [2022-11-23 14:47:06,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:47:06,144 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 202 [2022-11-23 14:47:06,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:47:06,160 INFO L225 Difference]: With dead ends: 3487 [2022-11-23 14:47:06,160 INFO L226 Difference]: Without dead ends: 3485 [2022-11-23 14:47:06,163 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 [2022-11-23 14:47:06,164 INFO L413 NwaCegarLoop]: 3898 mSDtfsCounter, 462 mSDsluCounter, 11332 mSDsCounter, 0 mSdLazyCounter, 2014 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 15230 SdHoareTripleChecker+Invalid, 2016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2014 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:47:06,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [463 Valid, 15230 Invalid, 2016 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 2014 Invalid, 1 Unknown, 0 Unchecked, 10.7s Time] [2022-11-23 14:47:06,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3485 states. [2022-11-23 14:47:06,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3485 to 3481. [2022-11-23 14:47:06,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3481 states, 2136 states have (on average 1.3164794007490637) internal successors, (2812), 2212 states have internal predecessors, (2812), 1107 states have call successors, (1107), 242 states have call predecessors, (1107), 236 states have return successors, (1109), 1078 states have call predecessors, (1109), 1107 states have call successors, (1109) [2022-11-23 14:47:06,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3481 states to 3481 states and 5028 transitions. [2022-11-23 14:47:06,580 INFO L78 Accepts]: Start accepts. Automaton has 3481 states and 5028 transitions. Word has length 202 [2022-11-23 14:47:06,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:47:06,581 INFO L495 AbstractCegarLoop]: Abstraction has 3481 states and 5028 transitions. [2022-11-23 14:47:06,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-23 14:47:06,581 INFO L276 IsEmpty]: Start isEmpty. Operand 3481 states and 5028 transitions. [2022-11-23 14:47:06,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2022-11-23 14:47:06,633 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:47:06,633 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:47:06,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-23 14:47:06,634 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 14:47:06,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:47:06,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1195754405, now seen corresponding path program 1 times [2022-11-23 14:47:06,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:47:06,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605886295] [2022-11-23 14:47:06,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:47:06,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:47:07,610 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:47:07,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2008034926] [2022-11-23 14:47:07,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:47:07,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:47:07,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a11cae-3506-451d-a908-4e1a4d666b58/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:47:07,619 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a11cae-3506-451d-a908-4e1a4d666b58/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:47:07,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a11cae-3506-451d-a908-4e1a4d666b58/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 14:47:11,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:47:11,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 9248 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:47:11,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:47:12,032 INFO L134 CoverageAnalysis]: Checked inductivity of 777 backedges. 414 proven. 0 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2022-11-23 14:47:12,033 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:47:12,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:47:12,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605886295] [2022-11-23 14:47:12,033 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 14:47:12,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008034926] [2022-11-23 14:47:12,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008034926] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:47:12,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:47:12,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:47:12,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787359006] [2022-11-23 14:47:12,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:47:12,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:47:12,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:47:12,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:47:12,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:47:12,037 INFO L87 Difference]: Start difference. First operand 3481 states and 5028 transitions. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 2 states have call successors, (100), 2 states have call predecessors, (100), 2 states have return successors, (92), 2 states have call predecessors, (92), 2 states have call successors, (92) [2022-11-23 14:47:14,085 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:47:19,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:47:19,146 INFO L93 Difference]: Finished difference Result 6951 states and 10148 transitions. [2022-11-23 14:47:19,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:47:19,147 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 2 states have call successors, (100), 2 states have call predecessors, (100), 2 states have return successors, (92), 2 states have call predecessors, (92), 2 states have call successors, (92) Word has length 488 [2022-11-23 14:47:19,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:47:19,174 INFO L225 Difference]: With dead ends: 6951 [2022-11-23 14:47:19,174 INFO L226 Difference]: Without dead ends: 3484 [2022-11-23 14:47:19,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:47:19,201 INFO L413 NwaCegarLoop]: 3730 mSDtfsCounter, 0 mSDsluCounter, 3724 mSDsCounter, 0 mSdLazyCounter, 965 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7454 SdHoareTripleChecker+Invalid, 970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 965 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:47:19,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 7454 Invalid, 970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 965 Invalid, 1 Unknown, 0 Unchecked, 6.6s Time] [2022-11-23 14:47:19,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3484 states. [2022-11-23 14:47:19,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3484 to 3484. [2022-11-23 14:47:19,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3484 states, 2139 states have (on average 1.316035530621786) internal successors, (2815), 2215 states have internal predecessors, (2815), 1107 states have call successors, (1107), 242 states have call predecessors, (1107), 236 states have return successors, (1109), 1078 states have call predecessors, (1109), 1107 states have call successors, (1109) [2022-11-23 14:47:19,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3484 states to 3484 states and 5031 transitions. [2022-11-23 14:47:19,667 INFO L78 Accepts]: Start accepts. Automaton has 3484 states and 5031 transitions. Word has length 488 [2022-11-23 14:47:19,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:47:19,670 INFO L495 AbstractCegarLoop]: Abstraction has 3484 states and 5031 transitions. [2022-11-23 14:47:19,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 2 states have call successors, (100), 2 states have call predecessors, (100), 2 states have return successors, (92), 2 states have call predecessors, (92), 2 states have call successors, (92) [2022-11-23 14:47:19,670 INFO L276 IsEmpty]: Start isEmpty. Operand 3484 states and 5031 transitions. [2022-11-23 14:47:19,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2022-11-23 14:47:19,714 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:47:19,714 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:47:19,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a11cae-3506-451d-a908-4e1a4d666b58/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 14:47:19,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a11cae-3506-451d-a908-4e1a4d666b58/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:47:19,939 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)] === [2022-11-23 14:47:19,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:47:19,940 INFO L85 PathProgramCache]: Analyzing trace with hash 875917789, now seen corresponding path program 1 times [2022-11-23 14:47:19,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:47:19,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308254991] [2022-11-23 14:47:19,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:47:19,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:47:21,002 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:47:21,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [162018257] [2022-11-23 14:47:21,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:47:21,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:47:21,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a11cae-3506-451d-a908-4e1a4d666b58/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:47:21,008 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a11cae-3506-451d-a908-4e1a4d666b58/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:47:21,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a11cae-3506-451d-a908-4e1a4d666b58/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 14:47:25,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:47:25,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 9264 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:47:25,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:47:25,546 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2022-11-23 14:47:25,546 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:47:25,546 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:47:25,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308254991] [2022-11-23 14:47:25,547 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 14:47:25,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162018257] [2022-11-23 14:47:25,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162018257] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:47:25,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:47:25,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:47:25,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736895165] [2022-11-23 14:47:25,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:47:25,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:47:25,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:47:25,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:47:25,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:47:25,550 INFO L87 Difference]: Start difference. First operand 3484 states and 5031 transitions. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 2 states have call successors, (94), 2 states have call predecessors, (94), 2 states have return successors, (87), 2 states have call predecessors, (87), 2 states have call successors, (87) [2022-11-23 14:47:27,601 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:47:32,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:47:32,789 INFO L93 Difference]: Finished difference Result 7151 states and 10432 transitions. [2022-11-23 14:47:32,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:47:32,790 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 2 states have call successors, (94), 2 states have call predecessors, (94), 2 states have return successors, (87), 2 states have call predecessors, (87), 2 states have call successors, (87) Word has length 489 [2022-11-23 14:47:32,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:47:32,816 INFO L225 Difference]: With dead ends: 7151 [2022-11-23 14:47:32,816 INFO L226 Difference]: Without dead ends: 3681 [2022-11-23 14:47:32,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 487 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:47:32,843 INFO L413 NwaCegarLoop]: 3788 mSDtfsCounter, 99 mSDsluCounter, 3738 mSDsCounter, 0 mSdLazyCounter, 968 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 7526 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 968 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:47:32,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 7526 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 968 Invalid, 1 Unknown, 0 Unchecked, 6.7s Time] [2022-11-23 14:47:32,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3681 states. [2022-11-23 14:47:33,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3681 to 3485. [2022-11-23 14:47:33,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3485 states, 2140 states have (on average 1.3158878504672897) internal successors, (2816), 2216 states have internal predecessors, (2816), 1107 states have call successors, (1107), 242 states have call predecessors, (1107), 236 states have return successors, (1109), 1078 states have call predecessors, (1109), 1107 states have call successors, (1109) [2022-11-23 14:47:33,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3485 states to 3485 states and 5032 transitions. [2022-11-23 14:47:33,286 INFO L78 Accepts]: Start accepts. Automaton has 3485 states and 5032 transitions. Word has length 489 [2022-11-23 14:47:33,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:47:33,287 INFO L495 AbstractCegarLoop]: Abstraction has 3485 states and 5032 transitions. [2022-11-23 14:47:33,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 2 states have call successors, (94), 2 states have call predecessors, (94), 2 states have return successors, (87), 2 states have call predecessors, (87), 2 states have call successors, (87) [2022-11-23 14:47:33,288 INFO L276 IsEmpty]: Start isEmpty. Operand 3485 states and 5032 transitions. [2022-11-23 14:47:33,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2022-11-23 14:47:33,330 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:47:33,330 INFO L195 NwaCegarLoop]: trace histogram [16, 14, 14, 8, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:47:33,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a11cae-3506-451d-a908-4e1a4d666b58/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 14:47:33,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a11cae-3506-451d-a908-4e1a4d666b58/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-23 14:47:33,543 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 14:47:33,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:47:33,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1723564172, now seen corresponding path program 1 times [2022-11-23 14:47:33,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:47:33,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201350852] [2022-11-23 14:47:33,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:47:33,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:47:34,521 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:47:34,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [662035779] [2022-11-23 14:47:34,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:47:34,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:47:34,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a11cae-3506-451d-a908-4e1a4d666b58/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:47:34,524 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a11cae-3506-451d-a908-4e1a4d666b58/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:47:34,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a11cae-3506-451d-a908-4e1a4d666b58/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 14:47:39,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:47:39,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 9082 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:47:39,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:47:39,342 INFO L134 CoverageAnalysis]: Checked inductivity of 740 backedges. 385 proven. 0 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2022-11-23 14:47:39,342 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:47:39,343 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:47:39,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201350852] [2022-11-23 14:47:39,343 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 14:47:39,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662035779] [2022-11-23 14:47:39,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662035779] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:47:39,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:47:39,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:47:39,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994572026] [2022-11-23 14:47:39,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:47:39,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:47:39,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:47:39,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:47:39,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:47:39,348 INFO L87 Difference]: Start difference. First operand 3485 states and 5032 transitions. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 3 states have call successors, (99), 2 states have call predecessors, (99), 2 states have return successors, (91), 3 states have call predecessors, (91), 3 states have call successors, (91) [2022-11-23 14:47:41,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:47:47,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:47:47,303 INFO L93 Difference]: Finished difference Result 6962 states and 10147 transitions. [2022-11-23 14:47:47,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:47:47,304 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 3 states have call successors, (99), 2 states have call predecessors, (99), 2 states have return successors, (91), 3 states have call predecessors, (91), 3 states have call successors, (91) Word has length 478 [2022-11-23 14:47:47,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:47:47,328 INFO L225 Difference]: With dead ends: 6962 [2022-11-23 14:47:47,328 INFO L226 Difference]: Without dead ends: 3491 [2022-11-23 14:47:47,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 476 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:47:47,352 INFO L413 NwaCegarLoop]: 3730 mSDtfsCounter, 4 mSDsluCounter, 3723 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 7453 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:47:47,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 7453 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 969 Invalid, 1 Unknown, 0 Unchecked, 7.3s Time] [2022-11-23 14:47:47,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3491 states. [2022-11-23 14:47:47,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3491 to 3489. [2022-11-23 14:47:47,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3489 states, 2143 states have (on average 1.3159122725151657) internal successors, (2820), 2219 states have internal predecessors, (2820), 1108 states have call successors, (1108), 242 states have call predecessors, (1108), 236 states have return successors, (1110), 1079 states have call predecessors, (1110), 1108 states have call successors, (1110) [2022-11-23 14:47:47,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3489 states to 3489 states and 5038 transitions. [2022-11-23 14:47:47,807 INFO L78 Accepts]: Start accepts. Automaton has 3489 states and 5038 transitions. Word has length 478 [2022-11-23 14:47:47,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:47:47,807 INFO L495 AbstractCegarLoop]: Abstraction has 3489 states and 5038 transitions. [2022-11-23 14:47:47,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 3 states have call successors, (99), 2 states have call predecessors, (99), 2 states have return successors, (91), 3 states have call predecessors, (91), 3 states have call successors, (91) [2022-11-23 14:47:47,808 INFO L276 IsEmpty]: Start isEmpty. Operand 3489 states and 5038 transitions. [2022-11-23 14:47:47,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2022-11-23 14:47:47,835 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:47:47,836 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 8, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:47:47,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a11cae-3506-451d-a908-4e1a4d666b58/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 14:47:48,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a11cae-3506-451d-a908-4e1a4d666b58/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:47:48,048 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 14:47:48,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:47:48,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1667327685, now seen corresponding path program 1 times [2022-11-23 14:47:48,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:47:48,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905764558] [2022-11-23 14:47:48,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:47:48,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:47:49,023 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:47:49,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1905007115] [2022-11-23 14:47:49,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:47:49,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:47:49,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a11cae-3506-451d-a908-4e1a4d666b58/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:47:49,026 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a11cae-3506-451d-a908-4e1a4d666b58/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:47:49,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a11cae-3506-451d-a908-4e1a4d666b58/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 14:47:53,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:47:53,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 9314 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 14:47:53,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:47:54,060 INFO L134 CoverageAnalysis]: Checked inductivity of 810 backedges. 430 proven. 0 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-11-23 14:47:54,060 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:47:54,060 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:47:54,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905764558] [2022-11-23 14:47:54,061 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 14:47:54,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905007115] [2022-11-23 14:47:54,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905007115] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:47:54,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:47:54,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:47:54,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148065506] [2022-11-23 14:47:54,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:47:54,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:47:54,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:47:54,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:47:54,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:47:54,067 INFO L87 Difference]: Start difference. First operand 3489 states and 5038 transitions. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 2 states have call successors, (103), 2 states have call predecessors, (103), 2 states have return successors, (95), 2 states have call predecessors, (95), 2 states have call successors, (95) [2022-11-23 14:47:56,118 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:48:00,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:48:00,762 INFO L93 Difference]: Finished difference Result 6963 states and 10148 transitions. [2022-11-23 14:48:00,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:48:00,763 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 2 states have call successors, (103), 2 states have call predecessors, (103), 2 states have return successors, (95), 2 states have call predecessors, (95), 2 states have call successors, (95) Word has length 502 [2022-11-23 14:48:00,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:48:00,777 INFO L225 Difference]: With dead ends: 6963 [2022-11-23 14:48:00,777 INFO L226 Difference]: Without dead ends: 3488 [2022-11-23 14:48:00,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 500 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:48:00,794 INFO L413 NwaCegarLoop]: 3730 mSDtfsCounter, 1 mSDsluCounter, 3721 mSDsCounter, 0 mSdLazyCounter, 971 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 7451 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 971 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:48:00,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 7451 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 971 Invalid, 1 Unknown, 0 Unchecked, 6.2s Time] [2022-11-23 14:48:00,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3488 states. [2022-11-23 14:48:01,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3488 to 3486. [2022-11-23 14:48:01,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3486 states, 2141 states have (on average 1.3157403082671648) internal successors, (2817), 2217 states have internal predecessors, (2817), 1107 states have call successors, (1107), 242 states have call predecessors, (1107), 236 states have return successors, (1109), 1078 states have call predecessors, (1109), 1107 states have call successors, (1109) [2022-11-23 14:48:01,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3486 states to 3486 states and 5033 transitions. [2022-11-23 14:48:01,274 INFO L78 Accepts]: Start accepts. Automaton has 3486 states and 5033 transitions. Word has length 502 [2022-11-23 14:48:01,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:48:01,275 INFO L495 AbstractCegarLoop]: Abstraction has 3486 states and 5033 transitions. [2022-11-23 14:48:01,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 2 states have call successors, (103), 2 states have call predecessors, (103), 2 states have return successors, (95), 2 states have call predecessors, (95), 2 states have call successors, (95) [2022-11-23 14:48:01,279 INFO L276 IsEmpty]: Start isEmpty. Operand 3486 states and 5033 transitions. [2022-11-23 14:48:01,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2022-11-23 14:48:01,303 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:48:01,303 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 8, 7, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:48:01,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a11cae-3506-451d-a908-4e1a4d666b58/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 14:48:01,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a11cae-3506-451d-a908-4e1a4d666b58/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:48:01,519 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 14:48:01,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:48:01,524 INFO L85 PathProgramCache]: Analyzing trace with hash 798516368, now seen corresponding path program 1 times [2022-11-23 14:48:01,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:48:01,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035814982] [2022-11-23 14:48:01,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:48:01,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:48:02,307 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:48:02,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [289675635] [2022-11-23 14:48:02,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:48:02,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:48:02,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a11cae-3506-451d-a908-4e1a4d666b58/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:48:02,309 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a11cae-3506-451d-a908-4e1a4d666b58/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:48:02,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a11cae-3506-451d-a908-4e1a4d666b58/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 14:48:07,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:48:07,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 9310 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:48:07,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:48:07,430 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 424 proven. 1 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2022-11-23 14:48:07,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:48:08,174 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 793 trivial. 0 not checked. [2022-11-23 14:48:08,174 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:48:08,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035814982] [2022-11-23 14:48:08,175 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 14:48:08,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289675635] [2022-11-23 14:48:08,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289675635] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:48:08,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [451393167] [2022-11-23 14:48:08,206 INFO L159 IcfgInterpreter]: Started Sifa with 319 locations of interest [2022-11-23 14:48:08,207 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:48:08,212 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-23 14:48:08,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:48:08,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-11-23 14:48:08,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115387236] [2022-11-23 14:48:08,216 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 14:48:08,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:48:08,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:48:08,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:48:08,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:48:08,218 INFO L87 Difference]: Start difference. First operand 3486 states and 5033 transitions. Second operand has 6 states, 6 states have (on average 45.166666666666664) internal successors, (271), 6 states have internal predecessors, (271), 2 states have call successors, (154), 2 states have call predecessors, (154), 2 states have return successors, (148), 2 states have call predecessors, (148), 2 states have call successors, (148) [2022-11-23 14:48:10,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:48:15,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:48:15,674 INFO L93 Difference]: Finished difference Result 6967 states and 10170 transitions. [2022-11-23 14:48:15,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:48:15,675 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 45.166666666666664) internal successors, (271), 6 states have internal predecessors, (271), 2 states have call successors, (154), 2 states have call predecessors, (154), 2 states have return successors, (148), 2 states have call predecessors, (148), 2 states have call successors, (148) Word has length 503 [2022-11-23 14:48:15,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:48:15,688 INFO L225 Difference]: With dead ends: 6967 [2022-11-23 14:48:15,688 INFO L226 Difference]: Without dead ends: 3495 [2022-11-23 14:48:15,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1004 GetRequests, 1000 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:48:15,707 INFO L413 NwaCegarLoop]: 3730 mSDtfsCounter, 0 mSDsluCounter, 3724 mSDsCounter, 0 mSdLazyCounter, 974 mSolverCounterSat, 26 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7454 SdHoareTripleChecker+Invalid, 1001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 974 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:48:15,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 7454 Invalid, 1001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 974 Invalid, 1 Unknown, 0 Unchecked, 6.7s Time] [2022-11-23 14:48:15,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3495 states. [2022-11-23 14:48:16,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3495 to 3495. [2022-11-23 14:48:16,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3495 states, 2150 states have (on average 1.3144186046511628) internal successors, (2826), 2226 states have internal predecessors, (2826), 1107 states have call successors, (1107), 242 states have call predecessors, (1107), 236 states have return successors, (1109), 1078 states have call predecessors, (1109), 1107 states have call successors, (1109) [2022-11-23 14:48:16,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3495 states to 3495 states and 5042 transitions. [2022-11-23 14:48:16,143 INFO L78 Accepts]: Start accepts. Automaton has 3495 states and 5042 transitions. Word has length 503 [2022-11-23 14:48:16,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:48:16,144 INFO L495 AbstractCegarLoop]: Abstraction has 3495 states and 5042 transitions. [2022-11-23 14:48:16,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 45.166666666666664) internal successors, (271), 6 states have internal predecessors, (271), 2 states have call successors, (154), 2 states have call predecessors, (154), 2 states have return successors, (148), 2 states have call predecessors, (148), 2 states have call successors, (148) [2022-11-23 14:48:16,145 INFO L276 IsEmpty]: Start isEmpty. Operand 3495 states and 5042 transitions. [2022-11-23 14:48:16,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2022-11-23 14:48:16,170 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:48:16,171 INFO L195 NwaCegarLoop]: trace histogram [16, 14, 14, 8, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:48:16,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a11cae-3506-451d-a908-4e1a4d666b58/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 14:48:16,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a11cae-3506-451d-a908-4e1a4d666b58/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:48:16,374 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 14:48:16,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:48:16,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1689636164, now seen corresponding path program 1 times [2022-11-23 14:48:16,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:48:16,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495989497] [2022-11-23 14:48:16,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:48:16,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:48:17,173 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:48:17,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1713598658] [2022-11-23 14:48:17,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:48:17,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:48:17,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a11cae-3506-451d-a908-4e1a4d666b58/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:48:17,179 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a11cae-3506-451d-a908-4e1a4d666b58/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:48:17,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a11cae-3506-451d-a908-4e1a4d666b58/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 14:48:22,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:48:22,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 9143 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 14:48:22,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:48:22,814 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 389 proven. 10 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2022-11-23 14:48:22,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:48:23,573 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2022-11-23 14:48:23,573 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:48:23,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495989497] [2022-11-23 14:48:23,573 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 14:48:23,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713598658] [2022-11-23 14:48:23,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713598658] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:48:23,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2119297338] [2022-11-23 14:48:23,580 INFO L159 IcfgInterpreter]: Started Sifa with 310 locations of interest [2022-11-23 14:48:23,581 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:48:23,582 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-23 14:48:23,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:48:23,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2022-11-23 14:48:23,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056531528] [2022-11-23 14:48:23,585 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 14:48:23,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 14:48:23,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:48:23,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 14:48:23,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:48:23,587 INFO L87 Difference]: Start difference. First operand 3495 states and 5042 transitions. Second operand has 8 states, 8 states have (on average 32.875) internal successors, (263), 8 states have internal predecessors, (263), 2 states have call successors, (147), 2 states have call predecessors, (147), 2 states have return successors, (141), 2 states have call predecessors, (141), 2 states have call successors, (141) [2022-11-23 14:48:25,636 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:48:33,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:48:34,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:48:34,326 INFO L93 Difference]: Finished difference Result 6982 states and 10182 transitions. [2022-11-23 14:48:34,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 14:48:34,328 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 32.875) internal successors, (263), 8 states have internal predecessors, (263), 2 states have call successors, (147), 2 states have call predecessors, (147), 2 states have return successors, (141), 2 states have call predecessors, (141), 2 states have call successors, (141) Word has length 486 [2022-11-23 14:48:34,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:48:34,343 INFO L225 Difference]: With dead ends: 6982 [2022-11-23 14:48:34,344 INFO L226 Difference]: Without dead ends: 3501 [2022-11-23 14:48:34,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 970 GetRequests, 960 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:48:34,362 INFO L413 NwaCegarLoop]: 3730 mSDtfsCounter, 0 mSDsluCounter, 7448 mSDsCounter, 0 mSdLazyCounter, 1461 mSolverCounterSat, 30 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 11178 SdHoareTripleChecker+Invalid, 1492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1461 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:48:34,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 11178 Invalid, 1492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1461 Invalid, 1 Unknown, 0 Unchecked, 10.2s Time] [2022-11-23 14:48:34,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3501 states. [2022-11-23 14:48:34,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3501 to 3501. [2022-11-23 14:48:34,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3501 states, 2156 states have (on average 1.313543599257885) internal successors, (2832), 2232 states have internal predecessors, (2832), 1107 states have call successors, (1107), 242 states have call predecessors, (1107), 236 states have return successors, (1109), 1078 states have call predecessors, (1109), 1107 states have call successors, (1109) [2022-11-23 14:48:34,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3501 states to 3501 states and 5048 transitions. [2022-11-23 14:48:34,912 INFO L78 Accepts]: Start accepts. Automaton has 3501 states and 5048 transitions. Word has length 486 [2022-11-23 14:48:34,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:48:34,913 INFO L495 AbstractCegarLoop]: Abstraction has 3501 states and 5048 transitions. [2022-11-23 14:48:34,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 32.875) internal successors, (263), 8 states have internal predecessors, (263), 2 states have call successors, (147), 2 states have call predecessors, (147), 2 states have return successors, (141), 2 states have call predecessors, (141), 2 states have call successors, (141) [2022-11-23 14:48:34,913 INFO L276 IsEmpty]: Start isEmpty. Operand 3501 states and 5048 transitions. [2022-11-23 14:48:34,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2022-11-23 14:48:34,934 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:48:34,935 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 8, 7, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:48:34,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a11cae-3506-451d-a908-4e1a4d666b58/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 14:48:35,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a11cae-3506-451d-a908-4e1a4d666b58/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-23 14:48:35,136 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 14:48:35,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:48:35,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1276081330, now seen corresponding path program 2 times [2022-11-23 14:48:35,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:48:35,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347162342] [2022-11-23 14:48:35,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:48:35,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:48:35,960 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:48:35,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [264001269] [2022-11-23 14:48:35,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:48:35,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:48:35,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a11cae-3506-451d-a908-4e1a4d666b58/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:48:35,963 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a11cae-3506-451d-a908-4e1a4d666b58/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:48:35,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a11cae-3506-451d-a908-4e1a4d666b58/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process