./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-dmfe.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12595cf3-c7a2-4d30-8f43-7aa1aaa991f8/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12595cf3-c7a2-4d30-8f43-7aa1aaa991f8/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12595cf3-c7a2-4d30-8f43-7aa1aaa991f8/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12595cf3-c7a2-4d30-8f43-7aa1aaa991f8/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-dmfe.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12595cf3-c7a2-4d30-8f43-7aa1aaa991f8/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12595cf3-c7a2-4d30-8f43-7aa1aaa991f8/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 4ee317e42bc2e06685ca0df819e5fc98feaca323581d52409851fe6eefd66a2a --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 17:57:53,879 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 17:57:53,882 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 17:57:53,932 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 17:57:53,933 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 17:57:53,940 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 17:57:53,943 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 17:57:53,948 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 17:57:53,951 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 17:57:53,957 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 17:57:53,958 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 17:57:53,960 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 17:57:53,961 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 17:57:53,964 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 17:57:53,966 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 17:57:53,969 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 17:57:53,971 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 17:57:53,972 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 17:57:53,977 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 17:57:53,989 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 17:57:53,992 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 17:57:53,993 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 17:57:53,997 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 17:57:53,998 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 17:57:54,003 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 17:57:54,003 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 17:57:54,004 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 17:57:54,006 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 17:57:54,007 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 17:57:54,008 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 17:57:54,009 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 17:57:54,010 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 17:57:54,012 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 17:57:54,014 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 17:57:54,015 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 17:57:54,016 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 17:57:54,016 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 17:57:54,017 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 17:57:54,017 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 17:57:54,018 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 17:57:54,019 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 17:57:54,020 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12595cf3-c7a2-4d30-8f43-7aa1aaa991f8/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-25 17:57:54,059 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 17:57:54,059 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 17:57:54,060 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 17:57:54,060 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 17:57:54,061 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 17:57:54,078 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 17:57:54,078 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 17:57:54,078 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 17:57:54,079 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 17:57:54,079 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 17:57:54,079 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 17:57:54,079 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 17:57:54,079 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 17:57:54,079 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 17:57:54,079 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 17:57:54,080 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 17:57:54,080 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 17:57:54,080 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 17:57:54,081 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 17:57:54,081 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 17:57:54,081 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 17:57:54,081 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 17:57:54,081 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 17:57:54,082 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 17:57:54,082 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 17:57:54,082 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 17:57:54,082 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 17:57:54,082 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 17:57:54,082 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 17:57:54,082 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 17:57:54,083 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 17:57:54,083 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 17:57:54,083 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 17:57:54,083 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 17:57:54,083 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 17:57:54,083 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 17:57:54,084 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 17:57:54,084 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 17:57:54,084 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12595cf3-c7a2-4d30-8f43-7aa1aaa991f8/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12595cf3-c7a2-4d30-8f43-7aa1aaa991f8/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ee317e42bc2e06685ca0df819e5fc98feaca323581d52409851fe6eefd66a2a [2021-11-25 17:57:54,350 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 17:57:54,375 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 17:57:54,378 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 17:57:54,379 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 17:57:54,381 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 17:57:54,383 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12595cf3-c7a2-4d30-8f43-7aa1aaa991f8/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-dmfe.cil.i [2021-11-25 17:57:54,446 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12595cf3-c7a2-4d30-8f43-7aa1aaa991f8/bin/utaipan-eEHZpOm5b7/data/6868beb54/aa834d8c63c44de3af09976bb2791259/FLAG664890ef8 [2021-11-25 17:57:55,504 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 17:57:55,506 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12595cf3-c7a2-4d30-8f43-7aa1aaa991f8/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-dmfe.cil.i [2021-11-25 17:57:55,581 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12595cf3-c7a2-4d30-8f43-7aa1aaa991f8/bin/utaipan-eEHZpOm5b7/data/6868beb54/aa834d8c63c44de3af09976bb2791259/FLAG664890ef8 [2021-11-25 17:57:55,804 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12595cf3-c7a2-4d30-8f43-7aa1aaa991f8/bin/utaipan-eEHZpOm5b7/data/6868beb54/aa834d8c63c44de3af09976bb2791259 [2021-11-25 17:57:55,807 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 17:57:55,808 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 17:57:55,810 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 17:57:55,810 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 17:57:55,814 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 17:57:55,815 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:57:55" (1/1) ... [2021-11-25 17:57:55,816 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c281a48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:57:55, skipping insertion in model container [2021-11-25 17:57:55,817 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:57:55" (1/1) ... [2021-11-25 17:57:55,825 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 17:57:56,000 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 17:57:59,212 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12595cf3-c7a2-4d30-8f43-7aa1aaa991f8/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-dmfe.cil.i[323320,323333] [2021-11-25 17:57:59,215 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12595cf3-c7a2-4d30-8f43-7aa1aaa991f8/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-dmfe.cil.i[323489,323502] [2021-11-25 17:57:59,216 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12595cf3-c7a2-4d30-8f43-7aa1aaa991f8/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-dmfe.cil.i[323656,323669] [2021-11-25 17:57:59,217 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12595cf3-c7a2-4d30-8f43-7aa1aaa991f8/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-dmfe.cil.i[323824,323837] [2021-11-25 17:57:59,250 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 17:57:59,292 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 17:57:59,737 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12595cf3-c7a2-4d30-8f43-7aa1aaa991f8/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-dmfe.cil.i[323320,323333] [2021-11-25 17:57:59,738 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12595cf3-c7a2-4d30-8f43-7aa1aaa991f8/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-dmfe.cil.i[323489,323502] [2021-11-25 17:57:59,739 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12595cf3-c7a2-4d30-8f43-7aa1aaa991f8/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-dmfe.cil.i[323656,323669] [2021-11-25 17:57:59,739 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12595cf3-c7a2-4d30-8f43-7aa1aaa991f8/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-dmfe.cil.i[323824,323837] [2021-11-25 17:57:59,757 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 17:58:00,001 INFO L208 MainTranslator]: Completed translation [2021-11-25 17:58:00,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:58:00 WrapperNode [2021-11-25 17:58:00,002 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 17:58:00,003 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 17:58:00,004 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 17:58:00,004 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 17:58:00,014 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:58:00" (1/1) ... [2021-11-25 17:58:00,146 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:58:00" (1/1) ... [2021-11-25 17:58:00,377 INFO L137 Inliner]: procedures = 422, calls = 1985, calls flagged for inlining = 201, calls inlined = 184, statements flattened = 5029 [2021-11-25 17:58:00,378 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 17:58:00,379 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 17:58:00,379 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 17:58:00,379 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 17:58:00,389 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:58:00" (1/1) ... [2021-11-25 17:58:00,390 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:58:00" (1/1) ... [2021-11-25 17:58:00,417 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:58:00" (1/1) ... [2021-11-25 17:58:00,418 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:58:00" (1/1) ... [2021-11-25 17:58:00,552 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:58:00" (1/1) ... [2021-11-25 17:58:00,596 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:58:00" (1/1) ... [2021-11-25 17:58:00,635 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:58:00" (1/1) ... [2021-11-25 17:58:00,673 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 17:58:00,674 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 17:58:00,674 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 17:58:00,674 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 17:58:00,675 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:58:00" (1/1) ... [2021-11-25 17:58:00,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 17:58:00,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12595cf3-c7a2-4d30-8f43-7aa1aaa991f8/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:58:00,715 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12595cf3-c7a2-4d30-8f43-7aa1aaa991f8/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 17:58:00,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12595cf3-c7a2-4d30-8f43-7aa1aaa991f8/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 17:58:00,773 INFO L130 BoogieDeclarations]: Found specification of procedure pci_release_regions [2021-11-25 17:58:00,774 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_release_regions [2021-11-25 17:58:00,774 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-25 17:58:00,774 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-25 17:58:00,774 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_alloc_skb [2021-11-25 17:58:00,774 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_alloc_skb [2021-11-25 17:58:00,775 INFO L130 BoogieDeclarations]: Found specification of procedure dmfe_set_filter_mode [2021-11-25 17:58:00,775 INFO L138 BoogieDeclarations]: Found implementation of procedure dmfe_set_filter_mode [2021-11-25 17:58:00,775 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-25 17:58:00,775 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-25 17:58:00,775 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-25 17:58:00,776 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-25 17:58:00,776 INFO L130 BoogieDeclarations]: Found specification of procedure dmfe_resume [2021-11-25 17:58:00,777 INFO L138 BoogieDeclarations]: Found implementation of procedure dmfe_resume [2021-11-25 17:58:00,777 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-25 17:58:00,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-25 17:58:00,777 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_ok [2021-11-25 17:58:00,777 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_ok [2021-11-25 17:58:00,778 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_lock_of_dmfe_board_info [2021-11-25 17:58:00,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_lock_of_dmfe_board_info [2021-11-25 17:58:00,778 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2021-11-25 17:58:00,778 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2021-11-25 17:58:00,778 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_on [2021-11-25 17:58:00,779 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_on [2021-11-25 17:58:00,779 INFO L130 BoogieDeclarations]: Found specification of procedure iowrite16 [2021-11-25 17:58:00,779 INFO L138 BoogieDeclarations]: Found implementation of procedure iowrite16 [2021-11-25 17:58:00,780 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_69 [2021-11-25 17:58:00,780 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_69 [2021-11-25 17:58:00,780 INFO L130 BoogieDeclarations]: Found specification of procedure ioread32 [2021-11-25 17:58:00,780 INFO L138 BoogieDeclarations]: Found implementation of procedure ioread32 [2021-11-25 17:58:00,781 INFO L130 BoogieDeclarations]: Found specification of procedure pci_name [2021-11-25 17:58:00,781 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_name [2021-11-25 17:58:00,781 INFO L130 BoogieDeclarations]: Found specification of procedure dmfe_reuse_skb [2021-11-25 17:58:00,781 INFO L138 BoogieDeclarations]: Found implementation of procedure dmfe_reuse_skb [2021-11-25 17:58:00,781 INFO L130 BoogieDeclarations]: Found specification of procedure dev_trans_start [2021-11-25 17:58:00,782 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_trans_start [2021-11-25 17:58:00,782 INFO L130 BoogieDeclarations]: Found specification of procedure pci_get_drvdata [2021-11-25 17:58:00,782 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_get_drvdata [2021-11-25 17:58:00,782 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-25 17:58:00,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-25 17:58:00,783 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-11-25 17:58:00,783 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-11-25 17:58:00,784 INFO L130 BoogieDeclarations]: Found specification of procedure iowrite32 [2021-11-25 17:58:00,784 INFO L138 BoogieDeclarations]: Found implementation of procedure iowrite32 [2021-11-25 17:58:00,786 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-25 17:58:00,786 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-25 17:58:00,786 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-25 17:58:00,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-25 17:58:00,787 INFO L130 BoogieDeclarations]: Found specification of procedure phy_write [2021-11-25 17:58:00,787 INFO L138 BoogieDeclarations]: Found implementation of procedure phy_write [2021-11-25 17:58:00,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 17:58:00,788 INFO L130 BoogieDeclarations]: Found specification of procedure poll_dmfe [2021-11-25 17:58:00,788 INFO L138 BoogieDeclarations]: Found implementation of procedure poll_dmfe [2021-11-25 17:58:00,788 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-25 17:58:00,789 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-25 17:58:00,789 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-25 17:58:00,789 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-25 17:58:00,790 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-25 17:58:00,790 INFO L130 BoogieDeclarations]: Found specification of procedure skb_copy_from_linear_data [2021-11-25 17:58:00,790 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_copy_from_linear_data [2021-11-25 17:58:00,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-25 17:58:00,790 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-25 17:58:00,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-25 17:58:00,791 INFO L130 BoogieDeclarations]: Found specification of procedure dmfe_remove_one [2021-11-25 17:58:00,791 INFO L138 BoogieDeclarations]: Found implementation of procedure dmfe_remove_one [2021-11-25 17:58:00,791 INFO L130 BoogieDeclarations]: Found specification of procedure phy_write_1bit [2021-11-25 17:58:00,791 INFO L138 BoogieDeclarations]: Found implementation of procedure phy_write_1bit [2021-11-25 17:58:00,793 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 17:58:00,793 INFO L130 BoogieDeclarations]: Found specification of procedure dm9132_id_table [2021-11-25 17:58:00,793 INFO L138 BoogieDeclarations]: Found implementation of procedure dm9132_id_table [2021-11-25 17:58:00,793 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2021-11-25 17:58:00,793 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2021-11-25 17:58:00,794 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_interrupt_context [2021-11-25 17:58:00,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_interrupt_context [2021-11-25 17:58:00,794 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2021-11-25 17:58:00,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2021-11-25 17:58:00,794 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_err_code [2021-11-25 17:58:00,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_err_code [2021-11-25 17:58:00,796 INFO L130 BoogieDeclarations]: Found specification of procedure dmfe_interrupt [2021-11-25 17:58:00,796 INFO L138 BoogieDeclarations]: Found implementation of procedure dmfe_interrupt [2021-11-25 17:58:00,796 INFO L130 BoogieDeclarations]: Found specification of procedure pci_free_consistent [2021-11-25 17:58:00,796 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_free_consistent [2021-11-25 17:58:00,796 INFO L130 BoogieDeclarations]: Found specification of procedure phy_read_1bit [2021-11-25 17:58:00,797 INFO L138 BoogieDeclarations]: Found implementation of procedure phy_read_1bit [2021-11-25 17:58:00,798 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-25 17:58:00,798 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-25 17:58:00,798 INFO L130 BoogieDeclarations]: Found specification of procedure cal_CRC [2021-11-25 17:58:00,799 INFO L138 BoogieDeclarations]: Found implementation of procedure cal_CRC [2021-11-25 17:58:00,799 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 17:58:00,799 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_1 [2021-11-25 17:58:00,799 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_1 [2021-11-25 17:58:00,799 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_0 [2021-11-25 17:58:00,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_0 [2021-11-25 17:58:00,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 17:58:00,801 INFO L130 BoogieDeclarations]: Found specification of procedure allocate_rx_buffer [2021-11-25 17:58:00,801 INFO L138 BoogieDeclarations]: Found implementation of procedure allocate_rx_buffer [2021-11-25 17:58:00,801 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-25 17:58:00,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-25 17:58:00,801 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-25 17:58:00,802 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-25 17:58:00,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 17:58:00,802 INFO L130 BoogieDeclarations]: Found specification of procedure pci_read_config_dword [2021-11-25 17:58:00,802 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_read_config_dword [2021-11-25 17:58:00,802 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-25 17:58:00,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-25 17:58:00,804 INFO L130 BoogieDeclarations]: Found specification of procedure ioread8 [2021-11-25 17:58:00,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ioread8 [2021-11-25 17:58:00,808 INFO L130 BoogieDeclarations]: Found specification of procedure dmfe_free_rxbuffer [2021-11-25 17:58:00,808 INFO L138 BoogieDeclarations]: Found implementation of procedure dmfe_free_rxbuffer [2021-11-25 17:58:00,808 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_spin_lock [2021-11-25 17:58:00,808 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_spin_lock [2021-11-25 17:58:00,809 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-25 17:58:00,810 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-25 17:58:00,811 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2021-11-25 17:58:00,811 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2021-11-25 17:58:00,816 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2021-11-25 17:58:00,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2021-11-25 17:58:00,817 INFO L130 BoogieDeclarations]: Found specification of procedure dmfe_stop [2021-11-25 17:58:00,817 INFO L138 BoogieDeclarations]: Found implementation of procedure dmfe_stop [2021-11-25 17:58:00,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 17:58:00,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 17:58:00,822 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-25 17:58:00,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-25 17:58:00,822 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-25 17:58:00,822 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-25 17:58:00,822 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-25 17:58:00,822 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-25 17:58:00,823 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_off [2021-11-25 17:58:00,823 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_off [2021-11-25 17:58:00,823 INFO L130 BoogieDeclarations]: Found specification of procedure dmfe_open [2021-11-25 17:58:00,823 INFO L138 BoogieDeclarations]: Found implementation of procedure dmfe_open [2021-11-25 17:58:00,823 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_process_context [2021-11-25 17:58:00,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_process_context [2021-11-25 17:58:00,824 INFO L130 BoogieDeclarations]: Found specification of procedure pci_map_single [2021-11-25 17:58:00,824 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_map_single [2021-11-25 17:58:00,824 INFO L130 BoogieDeclarations]: Found specification of procedure phy_read [2021-11-25 17:58:00,824 INFO L138 BoogieDeclarations]: Found implementation of procedure phy_read [2021-11-25 17:58:00,824 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-25 17:58:00,824 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-25 17:58:00,824 INFO L130 BoogieDeclarations]: Found specification of procedure pci_alloc_consistent [2021-11-25 17:58:00,825 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_alloc_consistent [2021-11-25 17:58:00,825 INFO L130 BoogieDeclarations]: Found specification of procedure send_filter_frame [2021-11-25 17:58:00,825 INFO L138 BoogieDeclarations]: Found implementation of procedure send_filter_frame [2021-11-25 17:58:00,825 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2021-11-25 17:58:00,825 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2021-11-25 17:58:00,825 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 17:58:00,826 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 17:58:00,826 INFO L130 BoogieDeclarations]: Found specification of procedure add_timer [2021-11-25 17:58:00,826 INFO L138 BoogieDeclarations]: Found implementation of procedure add_timer [2021-11-25 17:58:00,826 INFO L130 BoogieDeclarations]: Found specification of procedure pci_enable_wake [2021-11-25 17:58:00,826 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_enable_wake [2021-11-25 17:58:00,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 17:58:00,826 INFO L130 BoogieDeclarations]: Found specification of procedure dmfe_init_dm910x [2021-11-25 17:58:00,827 INFO L138 BoogieDeclarations]: Found implementation of procedure dmfe_init_dm910x [2021-11-25 17:58:00,827 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-25 17:58:00,827 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-25 17:58:00,827 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-25 17:58:00,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-25 17:58:00,827 INFO L130 BoogieDeclarations]: Found specification of procedure pci_write_config_dword [2021-11-25 17:58:00,827 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_write_config_dword [2021-11-25 17:58:00,828 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-25 17:58:00,828 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-25 17:58:00,828 INFO L130 BoogieDeclarations]: Found specification of procedure update_cr6 [2021-11-25 17:58:00,828 INFO L138 BoogieDeclarations]: Found implementation of procedure update_cr6 [2021-11-25 17:58:00,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 17:58:00,828 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-25 17:58:00,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-25 17:58:00,829 INFO L130 BoogieDeclarations]: Found specification of procedure srom_clk_write [2021-11-25 17:58:00,829 INFO L138 BoogieDeclarations]: Found implementation of procedure srom_clk_write [2021-11-25 17:58:00,829 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_EMGentry_exit_dmfe_cleanup_module_14_2 [2021-11-25 17:58:00,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_EMGentry_exit_dmfe_cleanup_module_14_2 [2021-11-25 17:58:00,830 INFO L130 BoogieDeclarations]: Found specification of procedure __le32_to_cpup [2021-11-25 17:58:00,830 INFO L138 BoogieDeclarations]: Found implementation of procedure __le32_to_cpup [2021-11-25 17:58:00,830 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-25 17:58:00,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-25 17:58:00,831 INFO L130 BoogieDeclarations]: Found specification of procedure pci_iounmap [2021-11-25 17:58:00,831 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_iounmap [2021-11-25 17:58:00,831 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_power_state [2021-11-25 17:58:00,831 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_power_state [2021-11-25 17:58:00,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 17:58:00,833 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-25 17:58:00,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-25 17:58:01,786 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 17:58:01,790 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 17:58:02,124 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-25 17:58:05,338 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-25 17:58:05,477 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 17:58:07,026 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 17:58:07,026 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 17:58:07,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:58:07 BoogieIcfgContainer [2021-11-25 17:58:07,032 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 17:58:07,035 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 17:58:07,035 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 17:58:07,039 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 17:58:07,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:57:55" (1/3) ... [2021-11-25 17:58:07,041 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c371421 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:58:07, skipping insertion in model container [2021-11-25 17:58:07,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:58:00" (2/3) ... [2021-11-25 17:58:07,042 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c371421 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:58:07, skipping insertion in model container [2021-11-25 17:58:07,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:58:07" (3/3) ... [2021-11-25 17:58:07,043 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-dec-tulip-dmfe.cil.i [2021-11-25 17:58:07,050 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 17:58:07,051 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-25 17:58:07,118 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 17:58:07,125 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 17:58:07,125 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-25 17:58:07,177 INFO L276 IsEmpty]: Start isEmpty. Operand has 1182 states, 677 states have (on average 1.2983751846381093) internal successors, (879), 700 states have internal predecessors, (879), 420 states have call successors, (420), 83 states have call predecessors, (420), 82 states have return successors, (414), 405 states have call predecessors, (414), 414 states have call successors, (414) [2021-11-25 17:58:07,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-25 17:58:07,196 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:58:07,197 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:58:07,197 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:58:07,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:58:07,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1063298655, now seen corresponding path program 1 times [2021-11-25 17:58:07,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:58:07,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417784682] [2021-11-25 17:58:07,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:58:07,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:58:07,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:58:08,074 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2021-11-25 17:58:08,075 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:58:08,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417784682] [2021-11-25 17:58:08,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417784682] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:58:08,076 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:58:08,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:58:08,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056727080] [2021-11-25 17:58:08,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:58:08,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:58:08,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:58:08,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:58:08,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:58:08,156 INFO L87 Difference]: Start difference. First operand has 1182 states, 677 states have (on average 1.2983751846381093) internal successors, (879), 700 states have internal predecessors, (879), 420 states have call successors, (420), 83 states have call predecessors, (420), 82 states have return successors, (414), 405 states have call predecessors, (414), 414 states have call successors, (414) Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-25 17:58:11,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:58:11,289 INFO L93 Difference]: Finished difference Result 3430 states and 5034 transitions. [2021-11-25 17:58:11,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:58:11,296 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 101 [2021-11-25 17:58:11,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:58:11,430 INFO L225 Difference]: With dead ends: 3430 [2021-11-25 17:58:11,430 INFO L226 Difference]: Without dead ends: 2255 [2021-11-25 17:58:11,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:58:11,458 INFO L933 BasicCegarLoop]: 1821 mSDtfsCounter, 1597 mSDsluCounter, 1650 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1597 SdHoareTripleChecker+Valid, 3219 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-25 17:58:11,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1597 Valid, 3219 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-25 17:58:11,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2255 states. [2021-11-25 17:58:11,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2255 to 2251. [2021-11-25 17:58:11,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2251 states, 1301 states have (on average 1.2890084550345888) internal successors, (1677), 1346 states have internal predecessors, (1677), 787 states have call successors, (787), 161 states have call predecessors, (787), 160 states have return successors, (783), 765 states have call predecessors, (783), 783 states have call successors, (783) [2021-11-25 17:58:11,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2251 states to 2251 states and 3247 transitions. [2021-11-25 17:58:11,943 INFO L78 Accepts]: Start accepts. Automaton has 2251 states and 3247 transitions. Word has length 101 [2021-11-25 17:58:11,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:58:11,944 INFO L470 AbstractCegarLoop]: Abstraction has 2251 states and 3247 transitions. [2021-11-25 17:58:11,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-25 17:58:11,944 INFO L276 IsEmpty]: Start isEmpty. Operand 2251 states and 3247 transitions. [2021-11-25 17:58:11,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-25 17:58:11,951 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:58:11,952 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:58:11,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 17:58:11,952 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:58:11,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:58:11,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1155850056, now seen corresponding path program 1 times [2021-11-25 17:58:11,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:58:11,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089896565] [2021-11-25 17:58:11,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:58:11,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:58:12,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:58:12,150 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2021-11-25 17:58:12,150 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:58:12,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089896565] [2021-11-25 17:58:12,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089896565] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:58:12,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:58:12,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:58:12,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002548544] [2021-11-25 17:58:12,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:58:12,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:58:12,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:58:12,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:58:12,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:58:12,155 INFO L87 Difference]: Start difference. First operand 2251 states and 3247 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-25 17:58:14,021 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:58:16,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:58:16,391 INFO L93 Difference]: Finished difference Result 6661 states and 9617 transitions. [2021-11-25 17:58:16,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:58:16,392 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 105 [2021-11-25 17:58:16,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:58:16,449 INFO L225 Difference]: With dead ends: 6661 [2021-11-25 17:58:16,449 INFO L226 Difference]: Without dead ends: 4427 [2021-11-25 17:58:16,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:58:16,480 INFO L933 BasicCegarLoop]: 1853 mSDtfsCounter, 1640 mSDsluCounter, 1650 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1640 SdHoareTripleChecker+Valid, 3249 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-25 17:58:16,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1640 Valid, 3249 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-11-25 17:58:16,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4427 states. [2021-11-25 17:58:16,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4427 to 4397. [2021-11-25 17:58:16,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4397 states, 2555 states have (on average 1.2915851272015655) internal successors, (3300), 2649 states have internal predecessors, (3300), 1522 states have call successors, (1522), 320 states have call predecessors, (1522), 317 states have return successors, (1528), 1471 states have call predecessors, (1528), 1518 states have call successors, (1528) [2021-11-25 17:58:16,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4397 states to 4397 states and 6350 transitions. [2021-11-25 17:58:16,935 INFO L78 Accepts]: Start accepts. Automaton has 4397 states and 6350 transitions. Word has length 105 [2021-11-25 17:58:16,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:58:16,936 INFO L470 AbstractCegarLoop]: Abstraction has 4397 states and 6350 transitions. [2021-11-25 17:58:16,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-25 17:58:16,936 INFO L276 IsEmpty]: Start isEmpty. Operand 4397 states and 6350 transitions. [2021-11-25 17:58:16,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-25 17:58:16,944 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:58:16,944 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:58:16,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 17:58:16,945 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:58:16,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:58:16,946 INFO L85 PathProgramCache]: Analyzing trace with hash -331408805, now seen corresponding path program 1 times [2021-11-25 17:58:16,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:58:16,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180754949] [2021-11-25 17:58:16,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:58:16,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:58:17,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:58:17,113 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2021-11-25 17:58:17,114 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:58:17,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180754949] [2021-11-25 17:58:17,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180754949] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:58:17,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:58:17,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:58:17,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175106656] [2021-11-25 17:58:17,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:58:17,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:58:17,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:58:17,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:58:17,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:58:17,118 INFO L87 Difference]: Start difference. First operand 4397 states and 6350 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-25 17:58:19,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:58:19,830 INFO L93 Difference]: Finished difference Result 12551 states and 18094 transitions. [2021-11-25 17:58:19,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:58:19,831 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 105 [2021-11-25 17:58:19,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:58:19,934 INFO L225 Difference]: With dead ends: 12551 [2021-11-25 17:58:19,934 INFO L226 Difference]: Without dead ends: 8171 [2021-11-25 17:58:19,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:58:19,973 INFO L933 BasicCegarLoop]: 1843 mSDtfsCounter, 1454 mSDsluCounter, 1643 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1454 SdHoareTripleChecker+Valid, 3232 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-25 17:58:19,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1454 Valid, 3232 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-25 17:58:19,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8171 states. [2021-11-25 17:58:20,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8171 to 8137. [2021-11-25 17:58:20,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8137 states, 4739 states have (on average 1.293943870014771) internal successors, (6132), 4921 states have internal predecessors, (6132), 2784 states have call successors, (2784), 618 states have call predecessors, (2784), 611 states have return successors, (2806), 2681 states have call predecessors, (2806), 2780 states have call successors, (2806) [2021-11-25 17:58:20,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8137 states to 8137 states and 11722 transitions. [2021-11-25 17:58:20,705 INFO L78 Accepts]: Start accepts. Automaton has 8137 states and 11722 transitions. Word has length 105 [2021-11-25 17:58:20,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:58:20,707 INFO L470 AbstractCegarLoop]: Abstraction has 8137 states and 11722 transitions. [2021-11-25 17:58:20,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-25 17:58:20,708 INFO L276 IsEmpty]: Start isEmpty. Operand 8137 states and 11722 transitions. [2021-11-25 17:58:20,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-25 17:58:20,718 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:58:20,718 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:58:20,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 17:58:20,719 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:58:20,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:58:20,719 INFO L85 PathProgramCache]: Analyzing trace with hash -197312477, now seen corresponding path program 1 times [2021-11-25 17:58:20,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:58:20,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626806864] [2021-11-25 17:58:20,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:58:20,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:58:20,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:58:21,012 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2021-11-25 17:58:21,012 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:58:21,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626806864] [2021-11-25 17:58:21,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626806864] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:58:21,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:58:21,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 17:58:21,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278051956] [2021-11-25 17:58:21,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:58:21,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 17:58:21,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:58:21,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 17:58:21,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:58:21,016 INFO L87 Difference]: Start difference. First operand 8137 states and 11722 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-25 17:58:28,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:58:28,947 INFO L93 Difference]: Finished difference Result 18696 states and 26839 transitions. [2021-11-25 17:58:28,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 17:58:28,948 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 108 [2021-11-25 17:58:28,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:58:29,062 INFO L225 Difference]: With dead ends: 18696 [2021-11-25 17:58:29,062 INFO L226 Difference]: Without dead ends: 10576 [2021-11-25 17:58:29,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:58:29,132 INFO L933 BasicCegarLoop]: 2147 mSDtfsCounter, 3552 mSDsluCounter, 3743 mSDsCounter, 0 mSdLazyCounter, 2489 mSolverCounterSat, 505 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3651 SdHoareTripleChecker+Valid, 5117 SdHoareTripleChecker+Invalid, 2994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 505 IncrementalHoareTripleChecker+Valid, 2489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2021-11-25 17:58:29,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3651 Valid, 5117 Invalid, 2994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [505 Valid, 2489 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2021-11-25 17:58:29,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10576 states. [2021-11-25 17:58:29,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10576 to 10504. [2021-11-25 17:58:29,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10504 states, 6287 states have (on average 1.3034833783998727) internal successors, (8195), 6538 states have internal predecessors, (8195), 3375 states have call successors, (3375), 854 states have call predecessors, (3375), 839 states have return successors, (3384), 3221 states have call predecessors, (3384), 3371 states have call successors, (3384) [2021-11-25 17:58:29,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10504 states to 10504 states and 14954 transitions. [2021-11-25 17:58:29,899 INFO L78 Accepts]: Start accepts. Automaton has 10504 states and 14954 transitions. Word has length 108 [2021-11-25 17:58:29,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:58:29,900 INFO L470 AbstractCegarLoop]: Abstraction has 10504 states and 14954 transitions. [2021-11-25 17:58:29,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-25 17:58:29,900 INFO L276 IsEmpty]: Start isEmpty. Operand 10504 states and 14954 transitions. [2021-11-25 17:58:29,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-25 17:58:29,902 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:58:29,902 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:58:29,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 17:58:29,903 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:58:29,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:58:29,904 INFO L85 PathProgramCache]: Analyzing trace with hash 198267755, now seen corresponding path program 1 times [2021-11-25 17:58:29,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:58:29,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489014462] [2021-11-25 17:58:29,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:58:29,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:58:29,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:58:30,070 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2021-11-25 17:58:30,071 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:58:30,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489014462] [2021-11-25 17:58:30,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489014462] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:58:30,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:58:30,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:58:30,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857089067] [2021-11-25 17:58:30,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:58:30,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:58:30,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:58:30,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:58:30,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:58:30,074 INFO L87 Difference]: Start difference. First operand 10504 states and 14954 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-25 17:58:33,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:58:33,061 INFO L93 Difference]: Finished difference Result 27897 states and 39637 transitions. [2021-11-25 17:58:33,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:58:33,062 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 110 [2021-11-25 17:58:33,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:58:33,180 INFO L225 Difference]: With dead ends: 27897 [2021-11-25 17:58:33,180 INFO L226 Difference]: Without dead ends: 17410 [2021-11-25 17:58:33,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:58:33,240 INFO L933 BasicCegarLoop]: 1803 mSDtfsCounter, 1520 mSDsluCounter, 1630 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1520 SdHoareTripleChecker+Valid, 3188 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-25 17:58:33,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1520 Valid, 3188 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-25 17:58:33,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17410 states. [2021-11-25 17:58:34,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17410 to 17378. [2021-11-25 17:58:34,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17378 states, 10333 states have (on average 1.2898480596148263) internal successors, (13328), 10738 states have internal predecessors, (13328), 5622 states have call successors, (5622), 1449 states have call predecessors, (5622), 1420 states have return successors, (5647), 5349 states have call predecessors, (5647), 5618 states have call successors, (5647) [2021-11-25 17:58:34,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17378 states to 17378 states and 24597 transitions. [2021-11-25 17:58:34,359 INFO L78 Accepts]: Start accepts. Automaton has 17378 states and 24597 transitions. Word has length 110 [2021-11-25 17:58:34,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:58:34,360 INFO L470 AbstractCegarLoop]: Abstraction has 17378 states and 24597 transitions. [2021-11-25 17:58:34,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-25 17:58:34,361 INFO L276 IsEmpty]: Start isEmpty. Operand 17378 states and 24597 transitions. [2021-11-25 17:58:34,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-25 17:58:34,363 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:58:34,363 INFO L514 BasicCegarLoop]: trace histogram [10, 8, 8, 8, 8, 8, 8, 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] [2021-11-25 17:58:34,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 17:58:34,364 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:58:34,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:58:34,365 INFO L85 PathProgramCache]: Analyzing trace with hash 563933831, now seen corresponding path program 1 times [2021-11-25 17:58:34,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:58:34,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137555226] [2021-11-25 17:58:34,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:58:34,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:58:34,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:58:34,542 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2021-11-25 17:58:34,542 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:58:34,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137555226] [2021-11-25 17:58:34,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137555226] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:58:34,543 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:58:34,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:58:34,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776298506] [2021-11-25 17:58:34,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:58:34,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:58:34,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:58:34,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:58:34,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:58:34,545 INFO L87 Difference]: Start difference. First operand 17378 states and 24597 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-25 17:58:38,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:58:38,493 INFO L93 Difference]: Finished difference Result 50976 states and 72189 transitions. [2021-11-25 17:58:38,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:58:38,494 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 123 [2021-11-25 17:58:38,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:58:38,727 INFO L225 Difference]: With dead ends: 50976 [2021-11-25 17:58:38,727 INFO L226 Difference]: Without dead ends: 33615 [2021-11-25 17:58:38,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:58:38,831 INFO L933 BasicCegarLoop]: 2018 mSDtfsCounter, 1647 mSDsluCounter, 1679 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1647 SdHoareTripleChecker+Valid, 3440 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-25 17:58:38,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1647 Valid, 3440 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-25 17:58:38,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33615 states. [2021-11-25 17:58:40,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33615 to 33541. [2021-11-25 17:58:40,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33541 states, 19920 states have (on average 1.2901606425702812) internal successors, (25700), 20748 states have internal predecessors, (25700), 10865 states have call successors, (10865), 2810 states have call predecessors, (10865), 2753 states have return successors, (10919), 10292 states have call predecessors, (10919), 10861 states have call successors, (10919) [2021-11-25 17:58:41,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33541 states to 33541 states and 47484 transitions. [2021-11-25 17:58:41,310 INFO L78 Accepts]: Start accepts. Automaton has 33541 states and 47484 transitions. Word has length 123 [2021-11-25 17:58:41,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:58:41,311 INFO L470 AbstractCegarLoop]: Abstraction has 33541 states and 47484 transitions. [2021-11-25 17:58:41,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-25 17:58:41,312 INFO L276 IsEmpty]: Start isEmpty. Operand 33541 states and 47484 transitions. [2021-11-25 17:58:41,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-25 17:58:41,315 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:58:41,315 INFO L514 BasicCegarLoop]: trace histogram [12, 8, 8, 8, 8, 8, 8, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:58:41,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 17:58:41,316 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:58:41,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:58:41,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1458511418, now seen corresponding path program 1 times [2021-11-25 17:58:41,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:58:41,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348829966] [2021-11-25 17:58:41,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:58:41,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:58:41,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:58:41,782 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2021-11-25 17:58:41,783 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:58:41,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348829966] [2021-11-25 17:58:41,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348829966] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:58:41,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:58:41,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 17:58:41,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120743276] [2021-11-25 17:58:41,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:58:41,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:58:41,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:58:41,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:58:41,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:58:41,786 INFO L87 Difference]: Start difference. First operand 33541 states and 47484 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-25 17:58:45,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:58:45,923 INFO L93 Difference]: Finished difference Result 33547 states and 47489 transitions. [2021-11-25 17:58:45,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 17:58:45,924 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 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 146 [2021-11-25 17:58:45,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:58:46,122 INFO L225 Difference]: With dead ends: 33547 [2021-11-25 17:58:46,122 INFO L226 Difference]: Without dead ends: 33545 [2021-11-25 17:58:46,139 INFO L932 BasicCegarLoop]: 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 [2021-11-25 17:58:46,143 INFO L933 BasicCegarLoop]: 1421 mSDtfsCounter, 1639 mSDsluCounter, 3356 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1651 SdHoareTripleChecker+Valid, 4249 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:58:46,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1651 Valid, 4249 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-25 17:58:46,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33545 states. [2021-11-25 17:58:48,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33545 to 33545. [2021-11-25 17:58:48,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33545 states, 19923 states have (on average 1.2901169502584953) internal successors, (25703), 20751 states have internal predecessors, (25703), 10865 states have call successors, (10865), 2811 states have call predecessors, (10865), 2754 states have return successors, (10919), 10292 states have call predecessors, (10919), 10861 states have call successors, (10919) [2021-11-25 17:58:48,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33545 states to 33545 states and 47487 transitions. [2021-11-25 17:58:48,622 INFO L78 Accepts]: Start accepts. Automaton has 33545 states and 47487 transitions. Word has length 146 [2021-11-25 17:58:48,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:58:48,624 INFO L470 AbstractCegarLoop]: Abstraction has 33545 states and 47487 transitions. [2021-11-25 17:58:48,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-25 17:58:48,624 INFO L276 IsEmpty]: Start isEmpty. Operand 33545 states and 47487 transitions. [2021-11-25 17:58:48,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-25 17:58:48,628 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:58:48,628 INFO L514 BasicCegarLoop]: trace histogram [12, 8, 8, 8, 8, 8, 8, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:58:48,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 17:58:48,628 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:58:48,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:58:48,630 INFO L85 PathProgramCache]: Analyzing trace with hash -48427560, now seen corresponding path program 1 times [2021-11-25 17:58:48,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:58:48,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028114549] [2021-11-25 17:58:48,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:58:48,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:58:48,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:58:48,917 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2021-11-25 17:58:48,917 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:58:48,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028114549] [2021-11-25 17:58:48,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028114549] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:58:48,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:58:48,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 17:58:48,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916634966] [2021-11-25 17:58:48,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:58:48,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:58:48,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:58:48,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:58:48,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:58:48,921 INFO L87 Difference]: Start difference. First operand 33545 states and 47487 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-25 17:58:53,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:58:53,096 INFO L93 Difference]: Finished difference Result 33551 states and 47492 transitions. [2021-11-25 17:58:53,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 17:58:53,097 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (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 151 [2021-11-25 17:58:53,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:58:53,300 INFO L225 Difference]: With dead ends: 33551 [2021-11-25 17:58:53,301 INFO L226 Difference]: Without dead ends: 33549 [2021-11-25 17:58:53,321 INFO L932 BasicCegarLoop]: 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 [2021-11-25 17:58:53,322 INFO L933 BasicCegarLoop]: 1424 mSDtfsCounter, 1634 mSDsluCounter, 3356 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1645 SdHoareTripleChecker+Valid, 4252 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:58:53,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1645 Valid, 4252 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-25 17:58:53,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33549 states. [2021-11-25 17:58:55,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33549 to 33549. [2021-11-25 17:58:55,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33549 states, 19926 states have (on average 1.2900732711030813) internal successors, (25706), 20754 states have internal predecessors, (25706), 10865 states have call successors, (10865), 2812 states have call predecessors, (10865), 2755 states have return successors, (10919), 10292 states have call predecessors, (10919), 10861 states have call successors, (10919) [2021-11-25 17:58:55,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33549 states to 33549 states and 47490 transitions. [2021-11-25 17:58:55,476 INFO L78 Accepts]: Start accepts. Automaton has 33549 states and 47490 transitions. Word has length 151 [2021-11-25 17:58:55,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:58:55,477 INFO L470 AbstractCegarLoop]: Abstraction has 33549 states and 47490 transitions. [2021-11-25 17:58:55,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-25 17:58:55,478 INFO L276 IsEmpty]: Start isEmpty. Operand 33549 states and 47490 transitions. [2021-11-25 17:58:55,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-25 17:58:55,481 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:58:55,481 INFO L514 BasicCegarLoop]: trace histogram [12, 8, 8, 8, 8, 8, 8, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:58:55,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 17:58:55,482 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:58:55,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:58:55,483 INFO L85 PathProgramCache]: Analyzing trace with hash 252135610, now seen corresponding path program 1 times [2021-11-25 17:58:55,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:58:55,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977679356] [2021-11-25 17:58:55,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:58:55,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:58:55,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:58:55,684 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2021-11-25 17:58:55,684 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:58:55,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977679356] [2021-11-25 17:58:55,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977679356] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:58:55,685 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:58:55,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 17:58:55,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224010210] [2021-11-25 17:58:55,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:58:55,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:58:55,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:58:55,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:58:55,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:58:55,687 INFO L87 Difference]: Start difference. First operand 33549 states and 47490 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-25 17:58:58,561 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:59:00,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:59:00,650 INFO L93 Difference]: Finished difference Result 33555 states and 47495 transitions. [2021-11-25 17:59:00,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 17:59:00,651 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 156 [2021-11-25 17:59:00,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:59:00,829 INFO L225 Difference]: With dead ends: 33555 [2021-11-25 17:59:00,829 INFO L226 Difference]: Without dead ends: 33553 [2021-11-25 17:59:00,847 INFO L932 BasicCegarLoop]: 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 [2021-11-25 17:59:00,850 INFO L933 BasicCegarLoop]: 1424 mSDtfsCounter, 1634 mSDsluCounter, 3356 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1644 SdHoareTripleChecker+Valid, 4252 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-25 17:59:00,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1644 Valid, 4252 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-11-25 17:59:00,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33553 states. [2021-11-25 17:59:02,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33553 to 33553. [2021-11-25 17:59:02,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33553 states, 19929 states have (on average 1.2900296050980982) internal successors, (25709), 20757 states have internal predecessors, (25709), 10865 states have call successors, (10865), 2813 states have call predecessors, (10865), 2756 states have return successors, (10919), 10292 states have call predecessors, (10919), 10861 states have call successors, (10919) [2021-11-25 17:59:02,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33553 states to 33553 states and 47493 transitions. [2021-11-25 17:59:02,766 INFO L78 Accepts]: Start accepts. Automaton has 33553 states and 47493 transitions. Word has length 156 [2021-11-25 17:59:02,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:59:02,767 INFO L470 AbstractCegarLoop]: Abstraction has 33553 states and 47493 transitions. [2021-11-25 17:59:02,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-25 17:59:02,768 INFO L276 IsEmpty]: Start isEmpty. Operand 33553 states and 47493 transitions. [2021-11-25 17:59:02,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-25 17:59:02,772 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:59:02,772 INFO L514 BasicCegarLoop]: trace histogram [12, 8, 8, 8, 8, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:59:02,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 17:59:02,772 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:59:02,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:59:02,773 INFO L85 PathProgramCache]: Analyzing trace with hash 439722712, now seen corresponding path program 1 times [2021-11-25 17:59:02,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:59:02,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336020643] [2021-11-25 17:59:02,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:02,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:59:02,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:59:02,980 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2021-11-25 17:59:02,980 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:59:02,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336020643] [2021-11-25 17:59:02,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336020643] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:59:02,980 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:59:02,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 17:59:02,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76703285] [2021-11-25 17:59:02,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:59:02,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:59:02,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:59:02,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:59:02,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:59:02,982 INFO L87 Difference]: Start difference. First operand 33553 states and 47493 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-25 17:59:04,455 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:59:07,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:59:07,279 INFO L93 Difference]: Finished difference Result 33559 states and 47498 transitions. [2021-11-25 17:59:07,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 17:59:07,281 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 161 [2021-11-25 17:59:07,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:59:07,429 INFO L225 Difference]: With dead ends: 33559 [2021-11-25 17:59:07,429 INFO L226 Difference]: Without dead ends: 33557 [2021-11-25 17:59:07,447 INFO L932 BasicCegarLoop]: 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 [2021-11-25 17:59:07,448 INFO L933 BasicCegarLoop]: 1424 mSDtfsCounter, 1634 mSDsluCounter, 3356 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1643 SdHoareTripleChecker+Valid, 4252 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-25 17:59:07,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1643 Valid, 4252 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-25 17:59:07,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33557 states. [2021-11-25 17:59:09,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33557 to 33557. [2021-11-25 17:59:09,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33557 states, 19932 states have (on average 1.2899859522376078) internal successors, (25712), 20760 states have internal predecessors, (25712), 10865 states have call successors, (10865), 2814 states have call predecessors, (10865), 2757 states have return successors, (10919), 10292 states have call predecessors, (10919), 10861 states have call successors, (10919) [2021-11-25 17:59:09,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33557 states to 33557 states and 47496 transitions. [2021-11-25 17:59:09,160 INFO L78 Accepts]: Start accepts. Automaton has 33557 states and 47496 transitions. Word has length 161 [2021-11-25 17:59:09,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:59:09,161 INFO L470 AbstractCegarLoop]: Abstraction has 33557 states and 47496 transitions. [2021-11-25 17:59:09,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-25 17:59:09,162 INFO L276 IsEmpty]: Start isEmpty. Operand 33557 states and 47496 transitions. [2021-11-25 17:59:09,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-25 17:59:09,166 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:59:09,167 INFO L514 BasicCegarLoop]: trace histogram [12, 8, 8, 8, 8, 8, 8, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:59:09,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 17:59:09,167 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:59:09,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:59:09,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1556217030, now seen corresponding path program 1 times [2021-11-25 17:59:09,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:59:09,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437019836] [2021-11-25 17:59:09,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:09,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:59:09,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:59:09,354 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2021-11-25 17:59:09,354 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:59:09,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437019836] [2021-11-25 17:59:09,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437019836] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:59:09,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:59:09,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 17:59:09,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841478279] [2021-11-25 17:59:09,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:59:09,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:59:09,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:59:09,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:59:09,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:59:09,358 INFO L87 Difference]: Start difference. First operand 33557 states and 47496 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-25 17:59:13,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:59:13,169 INFO L93 Difference]: Finished difference Result 33563 states and 47501 transitions. [2021-11-25 17:59:13,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 17:59:13,170 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 166 [2021-11-25 17:59:13,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:59:13,314 INFO L225 Difference]: With dead ends: 33563 [2021-11-25 17:59:13,315 INFO L226 Difference]: Without dead ends: 33561 [2021-11-25 17:59:13,338 INFO L932 BasicCegarLoop]: 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 [2021-11-25 17:59:13,339 INFO L933 BasicCegarLoop]: 1424 mSDtfsCounter, 1634 mSDsluCounter, 3356 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1642 SdHoareTripleChecker+Valid, 4252 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-25 17:59:13,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1642 Valid, 4252 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-25 17:59:13,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33561 states. [2021-11-25 17:59:15,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33561 to 33561. [2021-11-25 17:59:15,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33561 states, 19935 states have (on average 1.289942312515676) internal successors, (25715), 20763 states have internal predecessors, (25715), 10865 states have call successors, (10865), 2815 states have call predecessors, (10865), 2758 states have return successors, (10919), 10292 states have call predecessors, (10919), 10861 states have call successors, (10919) [2021-11-25 17:59:15,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33561 states to 33561 states and 47499 transitions. [2021-11-25 17:59:15,180 INFO L78 Accepts]: Start accepts. Automaton has 33561 states and 47499 transitions. Word has length 166 [2021-11-25 17:59:15,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:59:15,181 INFO L470 AbstractCegarLoop]: Abstraction has 33561 states and 47499 transitions. [2021-11-25 17:59:15,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-25 17:59:15,181 INFO L276 IsEmpty]: Start isEmpty. Operand 33561 states and 47499 transitions. [2021-11-25 17:59:15,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-25 17:59:15,185 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:59:15,185 INFO L514 BasicCegarLoop]: trace histogram [12, 8, 8, 8, 8, 8, 8, 6, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:59:15,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 17:59:15,186 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:59:15,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:59:15,187 INFO L85 PathProgramCache]: Analyzing trace with hash -137779240, now seen corresponding path program 1 times [2021-11-25 17:59:15,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:59:15,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191965699] [2021-11-25 17:59:15,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:15,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:59:15,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:59:15,361 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-25 17:59:15,361 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:59:15,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191965699] [2021-11-25 17:59:15,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191965699] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:59:15,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:59:15,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 17:59:15,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021092280] [2021-11-25 17:59:15,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:59:15,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:59:15,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:59:15,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:59:15,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:59:15,364 INFO L87 Difference]: Start difference. First operand 33561 states and 47499 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-25 17:59:18,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:59:18,927 INFO L93 Difference]: Finished difference Result 33567 states and 47504 transitions. [2021-11-25 17:59:18,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 17:59:18,928 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 171 [2021-11-25 17:59:18,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:59:19,058 INFO L225 Difference]: With dead ends: 33567 [2021-11-25 17:59:19,058 INFO L226 Difference]: Without dead ends: 33565 [2021-11-25 17:59:19,078 INFO L932 BasicCegarLoop]: 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 [2021-11-25 17:59:19,079 INFO L933 BasicCegarLoop]: 1424 mSDtfsCounter, 1634 mSDsluCounter, 3356 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1641 SdHoareTripleChecker+Valid, 4252 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-25 17:59:19,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1641 Valid, 4252 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-25 17:59:19,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33565 states. [2021-11-25 17:59:20,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33565 to 33565. [2021-11-25 17:59:20,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33565 states, 19938 states have (on average 1.2898986859263717) internal successors, (25718), 20766 states have internal predecessors, (25718), 10865 states have call successors, (10865), 2816 states have call predecessors, (10865), 2759 states have return successors, (10919), 10292 states have call predecessors, (10919), 10861 states have call successors, (10919) [2021-11-25 17:59:20,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33565 states to 33565 states and 47502 transitions. [2021-11-25 17:59:20,901 INFO L78 Accepts]: Start accepts. Automaton has 33565 states and 47502 transitions. Word has length 171 [2021-11-25 17:59:20,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:59:20,902 INFO L470 AbstractCegarLoop]: Abstraction has 33565 states and 47502 transitions. [2021-11-25 17:59:20,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-25 17:59:20,902 INFO L276 IsEmpty]: Start isEmpty. Operand 33565 states and 47502 transitions. [2021-11-25 17:59:20,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-25 17:59:20,908 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:59:20,908 INFO L514 BasicCegarLoop]: trace histogram [12, 8, 8, 8, 8, 8, 8, 7, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:59:20,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-25 17:59:20,909 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:59:20,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:59:20,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1432400454, now seen corresponding path program 1 times [2021-11-25 17:59:20,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:59:20,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870104569] [2021-11-25 17:59:20,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:20,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:59:20,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:59:21,075 INFO L134 CoverageAnalysis]: Checked inductivity of 399 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2021-11-25 17:59:21,076 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:59:21,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870104569] [2021-11-25 17:59:21,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870104569] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:59:21,076 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:59:21,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 17:59:21,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589791684] [2021-11-25 17:59:21,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:59:21,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:59:21,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:59:21,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:59:21,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:59:21,078 INFO L87 Difference]: Start difference. First operand 33565 states and 47502 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-25 17:59:24,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:59:24,865 INFO L93 Difference]: Finished difference Result 33571 states and 47507 transitions. [2021-11-25 17:59:24,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 17:59:24,866 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 176 [2021-11-25 17:59:24,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:59:24,982 INFO L225 Difference]: With dead ends: 33571 [2021-11-25 17:59:24,983 INFO L226 Difference]: Without dead ends: 33569 [2021-11-25 17:59:25,008 INFO L932 BasicCegarLoop]: 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 [2021-11-25 17:59:25,009 INFO L933 BasicCegarLoop]: 1424 mSDtfsCounter, 1634 mSDsluCounter, 3356 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1640 SdHoareTripleChecker+Valid, 4252 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-25 17:59:25,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1640 Valid, 4252 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-25 17:59:25,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33569 states. [2021-11-25 17:59:26,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33569 to 33569. [2021-11-25 17:59:26,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33569 states, 19941 states have (on average 1.289855072463768) internal successors, (25721), 20769 states have internal predecessors, (25721), 10865 states have call successors, (10865), 2817 states have call predecessors, (10865), 2760 states have return successors, (10919), 10292 states have call predecessors, (10919), 10861 states have call successors, (10919) [2021-11-25 17:59:26,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33569 states to 33569 states and 47505 transitions. [2021-11-25 17:59:26,969 INFO L78 Accepts]: Start accepts. Automaton has 33569 states and 47505 transitions. Word has length 176 [2021-11-25 17:59:26,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:59:26,969 INFO L470 AbstractCegarLoop]: Abstraction has 33569 states and 47505 transitions. [2021-11-25 17:59:26,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-25 17:59:26,970 INFO L276 IsEmpty]: Start isEmpty. Operand 33569 states and 47505 transitions. [2021-11-25 17:59:26,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-11-25 17:59:26,976 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:59:26,977 INFO L514 BasicCegarLoop]: trace histogram [12, 8, 8, 8, 8, 8, 8, 8, 7, 7, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:59:26,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-25 17:59:26,977 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:59:26,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:59:26,978 INFO L85 PathProgramCache]: Analyzing trace with hash -2041766696, now seen corresponding path program 1 times [2021-11-25 17:59:26,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:59:26,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120599285] [2021-11-25 17:59:26,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:26,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:59:27,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:59:27,158 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 411 trivial. 0 not checked. [2021-11-25 17:59:27,159 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:59:27,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120599285] [2021-11-25 17:59:27,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120599285] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:59:27,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:59:27,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 17:59:27,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709817053] [2021-11-25 17:59:27,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:59:27,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:59:27,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:59:27,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:59:27,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:59:27,162 INFO L87 Difference]: Start difference. First operand 33569 states and 47505 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-25 17:59:32,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:59:32,042 INFO L93 Difference]: Finished difference Result 37299 states and 52094 transitions. [2021-11-25 17:59:32,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 17:59:32,044 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 181 [2021-11-25 17:59:32,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:59:32,171 INFO L225 Difference]: With dead ends: 37299 [2021-11-25 17:59:32,171 INFO L226 Difference]: Without dead ends: 37297 [2021-11-25 17:59:32,190 INFO L932 BasicCegarLoop]: 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 [2021-11-25 17:59:32,190 INFO L933 BasicCegarLoop]: 1636 mSDtfsCounter, 1245 mSDsluCounter, 4665 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1250 SdHoareTripleChecker+Valid, 5596 SdHoareTripleChecker+Invalid, 1023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-25 17:59:32,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1250 Valid, 5596 Invalid, 1023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1021 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-11-25 17:59:32,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37297 states. [2021-11-25 17:59:33,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37297 to 37297. [2021-11-25 17:59:33,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37297 states, 22004 states have (on average 1.2812215960734412) internal successors, (28192), 22876 states have internal predecessors, (28192), 11923 states have call successors, (11923), 3424 states have call predecessors, (11923), 3367 states have return successors, (11977), 11342 states have call predecessors, (11977), 11919 states have call successors, (11977) [2021-11-25 17:59:34,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37297 states to 37297 states and 52092 transitions. [2021-11-25 17:59:34,138 INFO L78 Accepts]: Start accepts. Automaton has 37297 states and 52092 transitions. Word has length 181 [2021-11-25 17:59:34,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:59:34,138 INFO L470 AbstractCegarLoop]: Abstraction has 37297 states and 52092 transitions. [2021-11-25 17:59:34,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-25 17:59:34,139 INFO L276 IsEmpty]: Start isEmpty. Operand 37297 states and 52092 transitions. [2021-11-25 17:59:34,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-11-25 17:59:34,144 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:59:34,144 INFO L514 BasicCegarLoop]: trace histogram [14, 8, 8, 8, 8, 8, 8, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:59:34,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-25 17:59:34,145 INFO L402 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)] === [2021-11-25 17:59:34,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:59:34,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1751327686, now seen corresponding path program 1 times [2021-11-25 17:59:34,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:59:34,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082198766] [2021-11-25 17:59:34,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:34,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:59:34,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:59:34,295 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2021-11-25 17:59:34,296 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:59:34,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082198766] [2021-11-25 17:59:34,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082198766] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:59:34,296 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:59:34,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:59:34,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346513759] [2021-11-25 17:59:34,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:59:34,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:59:34,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:59:34,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:59:34,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:59:34,298 INFO L87 Difference]: Start difference. First operand 37297 states and 52092 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2021-11-25 17:59:38,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:59:38,784 INFO L93 Difference]: Finished difference Result 83263 states and 116334 transitions. [2021-11-25 17:59:38,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:59:38,784 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 181 [2021-11-25 17:59:38,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:59:38,947 INFO L225 Difference]: With dead ends: 83263 [2021-11-25 17:59:38,947 INFO L226 Difference]: Without dead ends: 46029 [2021-11-25 17:59:39,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:59:39,062 INFO L933 BasicCegarLoop]: 2147 mSDtfsCounter, 1170 mSDsluCounter, 1634 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1170 SdHoareTripleChecker+Valid, 3533 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:59:39,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1170 Valid, 3533 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 696 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-25 17:59:39,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46029 states. [2021-11-25 17:59:41,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46029 to 45941. [2021-11-25 17:59:41,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45941 states, 27290 states have (on average 1.281714913887871) internal successors, (34978), 28374 states have internal predecessors, (34978), 14487 states have call successors, (14487), 4234 states have call predecessors, (14487), 4161 states have return successors, (14541), 13758 states have call predecessors, (14541), 14483 states have call successors, (14541) [2021-11-25 17:59:41,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45941 states to 45941 states and 64006 transitions. [2021-11-25 17:59:41,933 INFO L78 Accepts]: Start accepts. Automaton has 45941 states and 64006 transitions. Word has length 181 [2021-11-25 17:59:41,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:59:41,934 INFO L470 AbstractCegarLoop]: Abstraction has 45941 states and 64006 transitions. [2021-11-25 17:59:41,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2021-11-25 17:59:41,935 INFO L276 IsEmpty]: Start isEmpty. Operand 45941 states and 64006 transitions. [2021-11-25 17:59:41,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-25 17:59:41,939 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:59:41,939 INFO L514 BasicCegarLoop]: trace histogram [14, 8, 8, 8, 8, 8, 8, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:59:41,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-25 17:59:41,940 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 17:59:41,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:59:41,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1723202496, now seen corresponding path program 1 times [2021-11-25 17:59:41,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:59:41,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179582762] [2021-11-25 17:59:41,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:59:41,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:59:42,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:59:42,125 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 407 trivial. 0 not checked. [2021-11-25 17:59:42,126 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:59:42,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179582762] [2021-11-25 17:59:42,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179582762] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:59:42,126 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:59:42,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 17:59:42,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921263385] [2021-11-25 17:59:42,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:59:42,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:59:42,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:59:42,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:59:42,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:59:42,128 INFO L87 Difference]: Start difference. First operand 45941 states and 64006 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20)