./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5a8611c-9fa3-41d0-b66a-6d3df502a55b/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5a8611c-9fa3-41d0-b66a-6d3df502a55b/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5a8611c-9fa3-41d0-b66a-6d3df502a55b/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5a8611c-9fa3-41d0-b66a-6d3df502a55b/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5a8611c-9fa3-41d0-b66a-6d3df502a55b/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5a8611c-9fa3-41d0-b66a-6d3df502a55b/bin/utaipan-Q6hlc19bkW --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 5afcd851c0eed3ee93d773a0172936a989a39cd6889ca2587c3b833a21bc8a3a --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 14:58:03,992 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:58:03,994 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:58:04,029 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:58:04,029 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:58:04,034 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:58:04,038 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:58:04,042 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:58:04,044 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:58:04,049 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:58:04,051 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:58:04,054 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:58:04,054 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:58:04,057 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:58:04,061 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:58:04,063 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:58:04,065 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:58:04,066 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:58:04,068 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:58:04,075 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:58:04,077 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:58:04,080 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:58:04,081 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:58:04,082 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:58:04,094 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:58:04,094 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:58:04,094 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:58:04,096 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:58:04,097 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:58:04,098 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:58:04,099 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:58:04,100 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:58:04,102 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:58:04,103 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:58:04,104 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:58:04,104 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:58:04,105 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:58:04,105 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:58:04,105 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:58:04,106 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:58:04,107 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:58:04,108 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5a8611c-9fa3-41d0-b66a-6d3df502a55b/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-23 14:58:04,152 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:58:04,152 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:58:04,153 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:58:04,153 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:58:04,154 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:58:04,154 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:58:04,155 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:58:04,155 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:58:04,155 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:58:04,155 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:58:04,156 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:58:04,157 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:58:04,157 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:58:04,157 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:58:04,157 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:58:04,158 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:58:04,158 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:58:04,158 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:58:04,159 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:58:04,159 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:58:04,159 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:58:04,159 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:58:04,160 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:58:04,160 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:58:04,160 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:58:04,160 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:58:04,161 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:58:04,161 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:58:04,162 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:58:04,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:58:04,162 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:58:04,163 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:58:04,163 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:58:04,163 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:58:04,163 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:58:04,163 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:58:04,164 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:58:04,164 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:58:04,164 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5a8611c-9fa3-41d0-b66a-6d3df502a55b/bin/utaipan-Q6hlc19bkW/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5a8611c-9fa3-41d0-b66a-6d3df502a55b/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5afcd851c0eed3ee93d773a0172936a989a39cd6889ca2587c3b833a21bc8a3a [2022-11-23 14:58:04,420 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:58:04,459 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:58:04,462 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:58:04,463 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:58:04,463 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:58:04,465 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5a8611c-9fa3-41d0-b66a-6d3df502a55b/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i [2022-11-23 14:58:07,601 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:58:08,439 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:58:08,439 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5a8611c-9fa3-41d0-b66a-6d3df502a55b/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i [2022-11-23 14:58:08,512 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5a8611c-9fa3-41d0-b66a-6d3df502a55b/bin/utaipan-Q6hlc19bkW/data/870bdcfae/d54ee934fa8b44fe9634b316cb59ef60/FLAG6b11886eb [2022-11-23 14:58:08,530 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5a8611c-9fa3-41d0-b66a-6d3df502a55b/bin/utaipan-Q6hlc19bkW/data/870bdcfae/d54ee934fa8b44fe9634b316cb59ef60 [2022-11-23 14:58:08,535 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:58:08,538 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:58:08,542 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:58:08,542 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:58:08,547 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:58:08,548 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:58:08" (1/1) ... [2022-11-23 14:58:08,550 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fc6cebe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:08, skipping insertion in model container [2022-11-23 14:58:08,550 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:58:08" (1/1) ... [2022-11-23 14:58:08,559 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:58:08,750 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:58:12,549 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5a8611c-9fa3-41d0-b66a-6d3df502a55b/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[410165,410178] [2022-11-23 14:58:12,553 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5a8611c-9fa3-41d0-b66a-6d3df502a55b/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[410334,410347] [2022-11-23 14:58:12,554 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5a8611c-9fa3-41d0-b66a-6d3df502a55b/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[410501,410514] [2022-11-23 14:58:12,555 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5a8611c-9fa3-41d0-b66a-6d3df502a55b/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[410669,410682] [2022-11-23 14:58:12,574 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:58:12,617 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:58:13,159 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5a8611c-9fa3-41d0-b66a-6d3df502a55b/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[410165,410178] [2022-11-23 14:58:13,160 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5a8611c-9fa3-41d0-b66a-6d3df502a55b/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[410334,410347] [2022-11-23 14:58:13,161 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5a8611c-9fa3-41d0-b66a-6d3df502a55b/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[410501,410514] [2022-11-23 14:58:13,161 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5a8611c-9fa3-41d0-b66a-6d3df502a55b/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[410669,410682] [2022-11-23 14:58:13,182 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:58:13,510 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:58:13,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:13 WrapperNode [2022-11-23 14:58:13,511 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:58:13,512 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:58:13,513 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:58:13,513 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:58:13,523 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:13" (1/1) ... [2022-11-23 14:58:13,638 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:13" (1/1) ... [2022-11-23 14:58:13,911 INFO L138 Inliner]: procedures = 541, calls = 2859, calls flagged for inlining = 282, calls inlined = 248, statements flattened = 7269 [2022-11-23 14:58:13,912 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:58:13,913 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:58:13,913 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:58:13,914 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:58:13,926 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:13" (1/1) ... [2022-11-23 14:58:13,926 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:13" (1/1) ... [2022-11-23 14:58:14,008 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:13" (1/1) ... [2022-11-23 14:58:14,009 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:13" (1/1) ... [2022-11-23 14:58:14,171 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:13" (1/1) ... [2022-11-23 14:58:14,194 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:13" (1/1) ... [2022-11-23 14:58:14,223 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:13" (1/1) ... [2022-11-23 14:58:14,243 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:13" (1/1) ... [2022-11-23 14:58:14,283 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:58:14,284 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:58:14,284 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:58:14,285 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:58:14,286 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:13" (1/1) ... [2022-11-23 14:58:14,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:58:14,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5a8611c-9fa3-41d0-b66a-6d3df502a55b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:58:14,319 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5a8611c-9fa3-41d0-b66a-6d3df502a55b/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:58:14,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5a8611c-9fa3-41d0-b66a-6d3df502a55b/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:58:14,371 INFO L130 BoogieDeclarations]: Found specification of procedure mdio_write [2022-11-23 14:58:14,372 INFO L138 BoogieDeclarations]: Found implementation of procedure mdio_write [2022-11-23 14:58:14,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-23 14:58:14,372 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-23 14:58:14,372 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_alloc_skb [2022-11-23 14:58:14,372 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_alloc_skb [2022-11-23 14:58:14,373 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2022-11-23 14:58:14,373 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2022-11-23 14:58:14,373 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-23 14:58:14,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-23 14:58:14,373 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2022-11-23 14:58:14,374 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2022-11-23 14:58:14,374 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2022-11-23 14:58:14,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2022-11-23 14:58:14,374 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2022-11-23 14:58:14,374 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2022-11-23 14:58:14,374 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2022-11-23 14:58:14,375 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2022-11-23 14:58:14,375 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_63 [2022-11-23 14:58:14,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_63 [2022-11-23 14:58:14,376 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_interrupt [2022-11-23 14:58:14,377 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_interrupt [2022-11-23 14:58:14,377 INFO L130 BoogieDeclarations]: Found specification of procedure pci_name [2022-11-23 14:58:14,378 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_name [2022-11-23 14:58:14,378 INFO L130 BoogieDeclarations]: Found specification of procedure pci_get_drvdata [2022-11-23 14:58:14,378 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_get_drvdata [2022-11-23 14:58:14,378 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2022-11-23 14:58:14,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2022-11-23 14:58:14,379 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2022-11-23 14:58:14,379 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2022-11-23 14:58:14,379 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2022-11-23 14:58:14,379 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2022-11-23 14:58:14,380 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2022-11-23 14:58:14,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2022-11-23 14:58:14,380 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unmap_single [2022-11-23 14:58:14,380 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unmap_single [2022-11-23 14:58:14,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 14:58:14,380 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_dwio_write_bcr [2022-11-23 14:58:14,381 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_dwio_write_bcr [2022-11-23 14:58:14,381 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-11-23 14:58:14,381 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-11-23 14:58:14,381 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2022-11-23 14:58:14,381 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2022-11-23 14:58:14,382 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-23 14:58:14,383 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2022-11-23 14:58:14,383 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2022-11-23 14:58:14,383 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_netdev [2022-11-23 14:58:14,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_netdev [2022-11-23 14:58:14,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-23 14:58:14,383 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2022-11-23 14:58:14,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2022-11-23 14:58:14,384 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_purge_tx_ring [2022-11-23 14:58:14,384 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_purge_tx_ring [2022-11-23 14:58:14,385 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 14:58:14,385 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2022-11-23 14:58:14,385 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2022-11-23 14:58:14,385 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-23 14:58:14,385 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-23 14:58:14,386 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_wio_write_bcr [2022-11-23 14:58:14,386 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_wio_write_bcr [2022-11-23 14:58:14,386 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_interrupt_context [2022-11-23 14:58:14,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_interrupt_context [2022-11-23 14:58:14,387 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2022-11-23 14:58:14,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2022-11-23 14:58:14,387 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_err_code [2022-11-23 14:58:14,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_err_code [2022-11-23 14:58:14,388 INFO L130 BoogieDeclarations]: Found specification of procedure pci_free_consistent [2022-11-23 14:58:14,388 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_free_consistent [2022-11-23 14:58:14,389 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2022-11-23 14:58:14,389 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2022-11-23 14:58:14,390 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_netif_start [2022-11-23 14:58:14,390 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_netif_start [2022-11-23 14:58:14,390 INFO L130 BoogieDeclarations]: Found specification of procedure napi_enable [2022-11-23 14:58:14,390 INFO L138 BoogieDeclarations]: Found implementation of procedure napi_enable [2022-11-23 14:58:14,391 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~~u16~0 [2022-11-23 14:58:14,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~~u16~0 [2022-11-23 14:58:14,392 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2022-11-23 14:58:14,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2022-11-23 14:58:14,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 14:58:14,392 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mod_timer [2022-11-23 14:58:14,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mod_timer [2022-11-23 14:58:14,393 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_open [2022-11-23 14:58:14,393 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_open [2022-11-23 14:58:14,393 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:58:14,393 INFO L130 BoogieDeclarations]: Found specification of procedure is_valid_ether_addr [2022-11-23 14:58:14,394 INFO L138 BoogieDeclarations]: Found implementation of procedure is_valid_ether_addr [2022-11-23 14:58:14,394 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2022-11-23 14:58:14,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2022-11-23 14:58:14,395 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2022-11-23 14:58:14,395 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2022-11-23 14:58:14,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-23 14:58:14,395 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2022-11-23 14:58:14,396 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2022-11-23 14:58:14,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2022-11-23 14:58:14,396 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_wio_reset [2022-11-23 14:58:14,396 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_wio_reset [2022-11-23 14:58:14,397 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_lock_of_pcnet32_private [2022-11-23 14:58:14,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_lock_of_pcnet32_private [2022-11-23 14:58:14,397 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2022-11-23 14:58:14,397 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2022-11-23 14:58:14,397 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_restart [2022-11-23 14:58:14,398 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_restart [2022-11-23 14:58:14,398 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_spin_lock [2022-11-23 14:58:14,399 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_spin_lock [2022-11-23 14:58:14,399 INFO L130 BoogieDeclarations]: Found specification of procedure napi_disable [2022-11-23 14:58:14,402 INFO L138 BoogieDeclarations]: Found implementation of procedure napi_disable [2022-11-23 14:58:14,403 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2022-11-23 14:58:14,403 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2022-11-23 14:58:14,404 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2022-11-23 14:58:14,405 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2022-11-23 14:58:14,405 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2022-11-23 14:58:14,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2022-11-23 14:58:14,406 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_dwio_read_csr [2022-11-23 14:58:14,406 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_dwio_read_csr [2022-11-23 14:58:14,413 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~TO~VOID [2022-11-23 14:58:14,414 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~TO~VOID [2022-11-23 14:58:14,414 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2022-11-23 14:58:14,414 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2022-11-23 14:58:14,414 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_dwio_reset [2022-11-23 14:58:14,415 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_dwio_reset [2022-11-23 14:58:14,415 INFO L130 BoogieDeclarations]: Found specification of procedure mdio_read [2022-11-23 14:58:14,415 INFO L138 BoogieDeclarations]: Found implementation of procedure mdio_read [2022-11-23 14:58:14,415 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:58:14,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:58:14,415 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2022-11-23 14:58:14,415 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2022-11-23 14:58:14,416 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-23 14:58:14,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-23 14:58:14,416 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-23 14:58:14,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-23 14:58:14,416 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_pm_resume [2022-11-23 14:58:14,416 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_pm_resume [2022-11-23 14:58:14,417 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2022-11-23 14:58:14,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2022-11-23 14:58:14,417 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_check_media [2022-11-23 14:58:14,417 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_check_media [2022-11-23 14:58:14,417 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_get_regs_len [2022-11-23 14:58:14,417 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_get_regs_len [2022-11-23 14:58:14,418 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_size_call_parameter [2022-11-23 14:58:14,418 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_process_context [2022-11-23 14:58:14,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_process_context [2022-11-23 14:58:14,418 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_poll_controller [2022-11-23 14:58:14,418 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_poll_controller [2022-11-23 14:58:14,418 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_free_ring [2022-11-23 14:58:14,419 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_free_ring [2022-11-23 14:58:14,419 INFO L130 BoogieDeclarations]: Found specification of procedure pci_map_single [2022-11-23 14:58:14,419 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_map_single [2022-11-23 14:58:14,419 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-23 14:58:14,419 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-23 14:58:14,419 INFO L130 BoogieDeclarations]: Found specification of procedure kcalloc [2022-11-23 14:58:14,420 INFO L138 BoogieDeclarations]: Found implementation of procedure kcalloc [2022-11-23 14:58:14,420 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2022-11-23 14:58:14,420 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2022-11-23 14:58:14,420 INFO L130 BoogieDeclarations]: Found specification of procedure pci_alloc_consistent [2022-11-23 14:58:14,420 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_alloc_consistent [2022-11-23 14:58:14,420 INFO L130 BoogieDeclarations]: Found specification of procedure mii_ethtool_gset [2022-11-23 14:58:14,421 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_ethtool_gset [2022-11-23 14:58:14,421 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_purge_rx_ring [2022-11-23 14:58:14,421 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_purge_rx_ring [2022-11-23 14:58:14,421 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_dwio_write_csr [2022-11-23 14:58:14,422 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_dwio_write_csr [2022-11-23 14:58:14,422 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_tx_timeout [2022-11-23 14:58:14,422 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_tx_timeout [2022-11-23 14:58:14,422 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2022-11-23 14:58:14,422 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2022-11-23 14:58:14,422 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 14:58:14,423 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_netif_stop [2022-11-23 14:58:14,423 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_netif_stop [2022-11-23 14:58:14,423 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2022-11-23 14:58:14,423 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2022-11-23 14:58:14,423 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-23 14:58:14,423 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_lock_of_pcnet32_private [2022-11-23 14:58:14,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_lock_of_pcnet32_private [2022-11-23 14:58:14,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-23 14:58:14,424 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_wio_read_csr [2022-11-23 14:58:14,424 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_wio_read_csr [2022-11-23 14:58:14,424 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_set_multicast_list [2022-11-23 14:58:14,424 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_set_multicast_list [2022-11-23 14:58:14,426 INFO L130 BoogieDeclarations]: Found specification of procedure outw [2022-11-23 14:58:14,427 INFO L138 BoogieDeclarations]: Found implementation of procedure outw [2022-11-23 14:58:14,427 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-11-23 14:58:14,427 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-11-23 14:58:14,427 INFO L130 BoogieDeclarations]: Found specification of procedure mii_link_ok [2022-11-23 14:58:14,427 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_link_ok [2022-11-23 14:58:14,427 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2022-11-23 14:58:14,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2022-11-23 14:58:14,428 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_probe1 [2022-11-23 14:58:14,428 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_probe1 [2022-11-23 14:58:14,428 INFO L130 BoogieDeclarations]: Found specification of procedure outl [2022-11-23 14:58:14,428 INFO L138 BoogieDeclarations]: Found implementation of procedure outl [2022-11-23 14:58:14,428 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_irq [2022-11-23 14:58:14,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_irq [2022-11-23 14:58:14,429 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_remove_one [2022-11-23 14:58:14,429 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_remove_one [2022-11-23 14:58:14,429 INFO L130 BoogieDeclarations]: Found specification of procedure mii_ethtool_sset [2022-11-23 14:58:14,429 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_ethtool_sset [2022-11-23 14:58:14,429 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~X~~u16~0~TO~VOID [2022-11-23 14:58:14,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~X~~u16~0~TO~VOID [2022-11-23 14:58:14,430 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_dwio_read_bcr [2022-11-23 14:58:14,430 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_dwio_read_bcr [2022-11-23 14:58:14,430 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reserve [2022-11-23 14:58:14,430 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reserve [2022-11-23 14:58:14,430 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2022-11-23 14:58:14,430 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2022-11-23 14:58:14,430 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2022-11-23 14:58:14,431 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2022-11-23 14:58:14,431 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_wio_read_bcr [2022-11-23 14:58:14,431 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_wio_read_bcr [2022-11-23 14:58:14,431 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2022-11-23 14:58:14,431 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2022-11-23 14:58:14,431 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_init_ring [2022-11-23 14:58:14,432 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_init_ring [2022-11-23 14:58:14,432 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_close [2022-11-23 14:58:14,432 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_close [2022-11-23 14:58:14,432 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2022-11-23 14:58:14,432 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2022-11-23 14:58:14,432 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-23 14:58:14,432 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-23 14:58:14,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 14:58:14,433 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_suspend [2022-11-23 14:58:14,433 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_suspend [2022-11-23 14:58:14,433 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-23 14:58:14,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-23 14:58:14,433 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2022-11-23 14:58:14,434 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2022-11-23 14:58:14,434 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_any [2022-11-23 14:58:14,434 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_any [2022-11-23 14:58:14,434 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_wio_write_csr [2022-11-23 14:58:14,434 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_wio_write_csr [2022-11-23 14:58:14,434 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_load_multicast [2022-11-23 14:58:14,434 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_load_multicast [2022-11-23 14:58:14,436 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_stop_queue [2022-11-23 14:58:14,440 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_stop_queue [2022-11-23 14:58:14,440 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_nway_reset [2022-11-23 14:58:14,441 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_nway_reset [2022-11-23 14:58:14,441 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2022-11-23 14:58:14,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2022-11-23 14:58:14,441 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_power_state [2022-11-23 14:58:14,441 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_power_state [2022-11-23 14:58:14,441 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2022-11-23 14:58:14,441 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2022-11-23 14:58:14,442 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2022-11-23 14:58:14,443 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2022-11-23 14:58:14,443 INFO L130 BoogieDeclarations]: Found specification of procedure inl [2022-11-23 14:58:14,443 INFO L138 BoogieDeclarations]: Found implementation of procedure inl [2022-11-23 14:58:14,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:58:14,443 INFO L130 BoogieDeclarations]: Found specification of procedure __request_region [2022-11-23 14:58:14,443 INFO L138 BoogieDeclarations]: Found implementation of procedure __request_region [2022-11-23 14:58:14,444 INFO L130 BoogieDeclarations]: Found specification of procedure inw [2022-11-23 14:58:14,444 INFO L138 BoogieDeclarations]: Found implementation of procedure inw [2022-11-23 14:58:14,444 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2022-11-23 14:58:14,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2022-11-23 14:58:14,444 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_netdev [2022-11-23 14:58:14,444 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_netdev [2022-11-23 14:58:15,671 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:58:15,674 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:58:15,971 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-23 14:58:26,113 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:58:28,478 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:58:28,478 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2022-11-23 14:58:28,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:58:28 BoogieIcfgContainer [2022-11-23 14:58:28,485 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:58:28,489 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:58:28,490 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:58:28,493 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:58:28,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:58:08" (1/3) ... [2022-11-23 14:58:28,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77c70dd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:58:28, skipping insertion in model container [2022-11-23 14:58:28,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:13" (2/3) ... [2022-11-23 14:58:28,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77c70dd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:58:28, skipping insertion in model container [2022-11-23 14:58:28,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:58:28" (3/3) ... [2022-11-23 14:58:28,500 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i [2022-11-23 14:58:28,522 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:58:28,523 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-11-23 14:58:28,646 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:58:28,655 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3cfbf4fd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:58:28,655 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-23 14:58:28,679 INFO L276 IsEmpty]: Start isEmpty. Operand has 1804 states, 1038 states have (on average 1.2842003853564548) internal successors, (1333), 1103 states have internal predecessors, (1333), 647 states have call successors, (647), 118 states have call predecessors, (647), 117 states have return successors, (639), 620 states have call predecessors, (639), 639 states have call successors, (639) [2022-11-23 14:58:28,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-23 14:58:28,692 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:58:28,693 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:58:28,694 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 14:58:28,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:58:28,701 INFO L85 PathProgramCache]: Analyzing trace with hash 408499364, now seen corresponding path program 1 times [2022-11-23 14:58:28,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:58:28,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718478730] [2022-11-23 14:58:28,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:58:28,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:58:29,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:58:29,989 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 14:58:29,990 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:58:29,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718478730] [2022-11-23 14:58:29,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718478730] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:58:29,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:58:29,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:58:29,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78769460] [2022-11-23 14:58:29,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:58:30,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:58:30,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:58:30,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:58:30,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:58:30,055 INFO L87 Difference]: Start difference. First operand has 1804 states, 1038 states have (on average 1.2842003853564548) internal successors, (1333), 1103 states have internal predecessors, (1333), 647 states have call successors, (647), 118 states have call predecessors, (647), 117 states have return successors, (639), 620 states have call predecessors, (639), 639 states have call successors, (639) Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-23 14:58:32,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:58:37,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:58:37,512 INFO L93 Difference]: Finished difference Result 5286 states and 7853 transitions. [2022-11-23 14:58:37,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:58:37,515 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 37 [2022-11-23 14:58:37,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:58:37,556 INFO L225 Difference]: With dead ends: 5286 [2022-11-23 14:58:37,556 INFO L226 Difference]: Without dead ends: 3477 [2022-11-23 14:58:37,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:58:37,579 INFO L413 NwaCegarLoop]: 3436 mSDtfsCounter, 2465 mSDsluCounter, 9112 mSDsCounter, 0 mSdLazyCounter, 1602 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2478 SdHoareTripleChecker+Valid, 12548 SdHoareTripleChecker+Invalid, 1606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1602 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:58:37,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2478 Valid, 12548 Invalid, 1606 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3 Valid, 1602 Invalid, 1 Unknown, 0 Unchecked, 6.8s Time] [2022-11-23 14:58:37,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3477 states. [2022-11-23 14:58:38,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3477 to 3470. [2022-11-23 14:58:38,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3470 states, 1998 states have (on average 1.2747747747747749) internal successors, (2547), 2109 states have internal predecessors, (2547), 1236 states have call successors, (1236), 235 states have call predecessors, (1236), 233 states have return successors, (1236), 1193 states have call predecessors, (1236), 1230 states have call successors, (1236) [2022-11-23 14:58:38,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3470 states to 3470 states and 5019 transitions. [2022-11-23 14:58:38,110 INFO L78 Accepts]: Start accepts. Automaton has 3470 states and 5019 transitions. Word has length 37 [2022-11-23 14:58:38,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:58:38,113 INFO L495 AbstractCegarLoop]: Abstraction has 3470 states and 5019 transitions. [2022-11-23 14:58:38,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-23 14:58:38,113 INFO L276 IsEmpty]: Start isEmpty. Operand 3470 states and 5019 transitions. [2022-11-23 14:58:38,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-23 14:58:38,124 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:58:38,124 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:58:38,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:58:38,125 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 14:58:38,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:58:38,126 INFO L85 PathProgramCache]: Analyzing trace with hash 854431682, now seen corresponding path program 1 times [2022-11-23 14:58:38,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:58:38,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480777676] [2022-11-23 14:58:38,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:58:38,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:58:38,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:58:38,839 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 14:58:38,840 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:58:38,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480777676] [2022-11-23 14:58:38,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480777676] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:58:38,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:58:38,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:58:38,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55984741] [2022-11-23 14:58:38,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:58:38,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:58:38,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:58:38,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:58:38,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:58:38,851 INFO L87 Difference]: Start difference. First operand 3470 states and 5019 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 14:58:41,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:58:44,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:58:44,748 INFO L93 Difference]: Finished difference Result 4806 states and 6740 transitions. [2022-11-23 14:58:44,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:58:44,749 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2022-11-23 14:58:44,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:58:44,781 INFO L225 Difference]: With dead ends: 4806 [2022-11-23 14:58:44,781 INFO L226 Difference]: Without dead ends: 4804 [2022-11-23 14:58:44,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:58:44,787 INFO L413 NwaCegarLoop]: 2606 mSDtfsCounter, 1705 mSDsluCounter, 6848 mSDsCounter, 0 mSdLazyCounter, 1243 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1718 SdHoareTripleChecker+Valid, 9454 SdHoareTripleChecker+Invalid, 1245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1243 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:58:44,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1718 Valid, 9454 Invalid, 1245 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 1243 Invalid, 1 Unknown, 0 Unchecked, 5.5s Time] [2022-11-23 14:58:44,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4804 states. [2022-11-23 14:58:45,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4804 to 4800. [2022-11-23 14:58:45,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4800 states, 2741 states have (on average 1.2546515870120394) internal successors, (3439), 2886 states have internal predecessors, (3439), 1646 states have call successors, (1646), 410 states have call predecessors, (1646), 410 states have return successors, (1650), 1590 states have call predecessors, (1650), 1640 states have call successors, (1650) [2022-11-23 14:58:45,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4800 states to 4800 states and 6735 transitions. [2022-11-23 14:58:45,163 INFO L78 Accepts]: Start accepts. Automaton has 4800 states and 6735 transitions. Word has length 42 [2022-11-23 14:58:45,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:58:45,164 INFO L495 AbstractCegarLoop]: Abstraction has 4800 states and 6735 transitions. [2022-11-23 14:58:45,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 14:58:45,164 INFO L276 IsEmpty]: Start isEmpty. Operand 4800 states and 6735 transitions. [2022-11-23 14:58:45,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-23 14:58:45,170 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:58:45,170 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:58:45,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 14:58:45,171 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 14:58:45,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:58:45,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1209168092, now seen corresponding path program 1 times [2022-11-23 14:58:45,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:58:45,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868021483] [2022-11-23 14:58:45,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:58:45,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:58:45,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:58:45,635 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-23 14:58:45,636 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:58:45,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868021483] [2022-11-23 14:58:45,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868021483] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:58:45,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:58:45,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:58:45,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006867001] [2022-11-23 14:58:45,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:58:45,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:58:45,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:58:45,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:58:45,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:58:45,639 INFO L87 Difference]: Start difference. First operand 4800 states and 6735 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 14:58:48,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:58:51,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:58:51,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:58:51,482 INFO L93 Difference]: Finished difference Result 4814 states and 6746 transitions. [2022-11-23 14:58:51,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:58:51,483 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 47 [2022-11-23 14:58:51,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:58:51,514 INFO L225 Difference]: With dead ends: 4814 [2022-11-23 14:58:51,514 INFO L226 Difference]: Without dead ends: 4812 [2022-11-23 14:58:51,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:58:51,524 INFO L413 NwaCegarLoop]: 2600 mSDtfsCounter, 1705 mSDsluCounter, 6836 mSDsCounter, 0 mSdLazyCounter, 1243 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1717 SdHoareTripleChecker+Valid, 9436 SdHoareTripleChecker+Invalid, 1245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1243 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:58:51,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1717 Valid, 9436 Invalid, 1245 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 1243 Invalid, 1 Unknown, 0 Unchecked, 5.5s Time] [2022-11-23 14:58:51,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4812 states. [2022-11-23 14:58:51,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4812 to 4808. [2022-11-23 14:58:51,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4808 states, 2747 states have (on average 1.2540953767746632) internal successors, (3445), 2892 states have internal predecessors, (3445), 1646 states have call successors, (1646), 412 states have call predecessors, (1646), 412 states have return successors, (1650), 1590 states have call predecessors, (1650), 1640 states have call successors, (1650) [2022-11-23 14:58:51,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4808 states to 4808 states and 6741 transitions. [2022-11-23 14:58:51,892 INFO L78 Accepts]: Start accepts. Automaton has 4808 states and 6741 transitions. Word has length 47 [2022-11-23 14:58:51,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:58:51,892 INFO L495 AbstractCegarLoop]: Abstraction has 4808 states and 6741 transitions. [2022-11-23 14:58:51,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 14:58:51,893 INFO L276 IsEmpty]: Start isEmpty. Operand 4808 states and 6741 transitions. [2022-11-23 14:58:51,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-23 14:58:51,894 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:58:51,894 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:58:51,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 14:58:51,895 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 14:58:51,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:58:51,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1856544922, now seen corresponding path program 1 times [2022-11-23 14:58:51,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:58:51,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714280388] [2022-11-23 14:58:51,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:58:51,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:58:51,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:58:52,296 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-23 14:58:52,297 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:58:52,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714280388] [2022-11-23 14:58:52,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714280388] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:58:52,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:58:52,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:58:52,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580099109] [2022-11-23 14:58:52,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:58:52,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:58:52,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:58:52,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:58:52,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:58:52,300 INFO L87 Difference]: Start difference. First operand 4808 states and 6741 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-23 14:58:54,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:58:57,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:58:57,550 INFO L93 Difference]: Finished difference Result 4822 states and 6752 transitions. [2022-11-23 14:58:57,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:58:57,551 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 59 [2022-11-23 14:58:57,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:58:57,582 INFO L225 Difference]: With dead ends: 4822 [2022-11-23 14:58:57,583 INFO L226 Difference]: Without dead ends: 4820 [2022-11-23 14:58:57,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:58:57,589 INFO L413 NwaCegarLoop]: 2600 mSDtfsCounter, 1700 mSDsluCounter, 6836 mSDsCounter, 0 mSdLazyCounter, 1243 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1711 SdHoareTripleChecker+Valid, 9436 SdHoareTripleChecker+Invalid, 1245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1243 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:58:57,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1711 Valid, 9436 Invalid, 1245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1243 Invalid, 1 Unknown, 0 Unchecked, 4.9s Time] [2022-11-23 14:58:57,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4820 states. [2022-11-23 14:58:57,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4820 to 4816. [2022-11-23 14:58:57,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4816 states, 2753 states have (on average 1.2535415909916454) internal successors, (3451), 2898 states have internal predecessors, (3451), 1646 states have call successors, (1646), 414 states have call predecessors, (1646), 414 states have return successors, (1650), 1590 states have call predecessors, (1650), 1640 states have call successors, (1650) [2022-11-23 14:58:57,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4816 states to 4816 states and 6747 transitions. [2022-11-23 14:58:57,973 INFO L78 Accepts]: Start accepts. Automaton has 4816 states and 6747 transitions. Word has length 59 [2022-11-23 14:58:57,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:58:57,974 INFO L495 AbstractCegarLoop]: Abstraction has 4816 states and 6747 transitions. [2022-11-23 14:58:57,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-23 14:58:57,975 INFO L276 IsEmpty]: Start isEmpty. Operand 4816 states and 6747 transitions. [2022-11-23 14:58:57,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-23 14:58:57,977 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:58:57,977 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:58:57,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 14:58:57,978 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 14:58:57,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:58:57,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1331135284, now seen corresponding path program 1 times [2022-11-23 14:58:57,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:58:57,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388566093] [2022-11-23 14:58:57,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:58:57,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:58:58,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:58:58,414 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-23 14:58:58,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:58:58,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388566093] [2022-11-23 14:58:58,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388566093] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:58:58,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:58:58,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:58:58,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497282472] [2022-11-23 14:58:58,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:58:58,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:58:58,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:58:58,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:58:58,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:58:58,418 INFO L87 Difference]: Start difference. First operand 4816 states and 6747 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-23 14:59:00,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:59:03,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:59:03,849 INFO L93 Difference]: Finished difference Result 4830 states and 6758 transitions. [2022-11-23 14:59:03,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:59:03,850 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 64 [2022-11-23 14:59:03,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:59:03,887 INFO L225 Difference]: With dead ends: 4830 [2022-11-23 14:59:03,887 INFO L226 Difference]: Without dead ends: 4828 [2022-11-23 14:59:03,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:59:03,892 INFO L413 NwaCegarLoop]: 2600 mSDtfsCounter, 1700 mSDsluCounter, 6836 mSDsCounter, 0 mSdLazyCounter, 1243 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1710 SdHoareTripleChecker+Valid, 9436 SdHoareTripleChecker+Invalid, 1245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1243 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:59:03,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1710 Valid, 9436 Invalid, 1245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1243 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2022-11-23 14:59:03,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4828 states. [2022-11-23 14:59:04,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4828 to 4824. [2022-11-23 14:59:04,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4824 states, 2759 states have (on average 1.2529902138455962) internal successors, (3457), 2904 states have internal predecessors, (3457), 1646 states have call successors, (1646), 416 states have call predecessors, (1646), 416 states have return successors, (1650), 1590 states have call predecessors, (1650), 1640 states have call successors, (1650) [2022-11-23 14:59:04,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4824 states to 4824 states and 6753 transitions. [2022-11-23 14:59:04,330 INFO L78 Accepts]: Start accepts. Automaton has 4824 states and 6753 transitions. Word has length 64 [2022-11-23 14:59:04,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:59:04,330 INFO L495 AbstractCegarLoop]: Abstraction has 4824 states and 6753 transitions. [2022-11-23 14:59:04,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-23 14:59:04,331 INFO L276 IsEmpty]: Start isEmpty. Operand 4824 states and 6753 transitions. [2022-11-23 14:59:04,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-23 14:59:04,334 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:59:04,335 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:59:04,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 14:59:04,335 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 14:59:04,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:59:04,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1784576102, now seen corresponding path program 1 times [2022-11-23 14:59:04,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:59:04,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331589927] [2022-11-23 14:59:04,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:59:04,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:59:04,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:59:04,784 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-23 14:59:04,784 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:59:04,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331589927] [2022-11-23 14:59:04,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331589927] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:59:04,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:59:04,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:59:04,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122645740] [2022-11-23 14:59:04,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:59:04,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:59:04,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:59:04,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:59:04,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:59:04,788 INFO L87 Difference]: Start difference. First operand 4824 states and 6753 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 14:59:07,369 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:59:10,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:59:10,672 INFO L93 Difference]: Finished difference Result 4838 states and 6764 transitions. [2022-11-23 14:59:10,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:59:10,673 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 69 [2022-11-23 14:59:10,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:59:10,709 INFO L225 Difference]: With dead ends: 4838 [2022-11-23 14:59:10,709 INFO L226 Difference]: Without dead ends: 4836 [2022-11-23 14:59:10,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:59:10,716 INFO L413 NwaCegarLoop]: 2600 mSDtfsCounter, 1700 mSDsluCounter, 6836 mSDsCounter, 0 mSdLazyCounter, 1243 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1709 SdHoareTripleChecker+Valid, 9436 SdHoareTripleChecker+Invalid, 1245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1243 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:59:10,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1709 Valid, 9436 Invalid, 1245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1243 Invalid, 1 Unknown, 0 Unchecked, 5.5s Time] [2022-11-23 14:59:10,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4836 states. [2022-11-23 14:59:11,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4836 to 4832. [2022-11-23 14:59:11,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4832 states, 2765 states have (on average 1.2524412296564196) internal successors, (3463), 2910 states have internal predecessors, (3463), 1646 states have call successors, (1646), 418 states have call predecessors, (1646), 418 states have return successors, (1650), 1590 states have call predecessors, (1650), 1640 states have call successors, (1650) [2022-11-23 14:59:11,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4832 states to 4832 states and 6759 transitions. [2022-11-23 14:59:11,084 INFO L78 Accepts]: Start accepts. Automaton has 4832 states and 6759 transitions. Word has length 69 [2022-11-23 14:59:11,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:59:11,084 INFO L495 AbstractCegarLoop]: Abstraction has 4832 states and 6759 transitions. [2022-11-23 14:59:11,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 14:59:11,085 INFO L276 IsEmpty]: Start isEmpty. Operand 4832 states and 6759 transitions. [2022-11-23 14:59:11,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-23 14:59:11,087 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:59:11,088 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:59:11,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 14:59:11,088 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 14:59:11,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:59:11,089 INFO L85 PathProgramCache]: Analyzing trace with hash -251005916, now seen corresponding path program 1 times [2022-11-23 14:59:11,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:59:11,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146000171] [2022-11-23 14:59:11,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:59:11,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:59:11,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:59:11,468 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-23 14:59:11,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:59:11,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146000171] [2022-11-23 14:59:11,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146000171] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:59:11,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:59:11,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:59:11,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926069515] [2022-11-23 14:59:11,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:59:11,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:59:11,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:59:11,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:59:11,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:59:11,472 INFO L87 Difference]: Start difference. First operand 4832 states and 6759 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 14:59:14,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:59:16,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:59:16,550 INFO L93 Difference]: Finished difference Result 4846 states and 6770 transitions. [2022-11-23 14:59:16,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:59:16,551 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 67 [2022-11-23 14:59:16,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:59:16,587 INFO L225 Difference]: With dead ends: 4846 [2022-11-23 14:59:16,588 INFO L226 Difference]: Without dead ends: 4844 [2022-11-23 14:59:16,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:59:16,594 INFO L413 NwaCegarLoop]: 2600 mSDtfsCounter, 1705 mSDsluCounter, 6836 mSDsCounter, 0 mSdLazyCounter, 1243 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1713 SdHoareTripleChecker+Valid, 9436 SdHoareTripleChecker+Invalid, 1245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1243 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:59:16,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1713 Valid, 9436 Invalid, 1245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1243 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2022-11-23 14:59:16,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4844 states. [2022-11-23 14:59:16,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4844 to 4840. [2022-11-23 14:59:16,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4840 states, 2771 states have (on average 1.2518946228798267) internal successors, (3469), 2916 states have internal predecessors, (3469), 1646 states have call successors, (1646), 420 states have call predecessors, (1646), 420 states have return successors, (1650), 1590 states have call predecessors, (1650), 1640 states have call successors, (1650) [2022-11-23 14:59:16,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4840 states to 4840 states and 6765 transitions. [2022-11-23 14:59:16,973 INFO L78 Accepts]: Start accepts. Automaton has 4840 states and 6765 transitions. Word has length 67 [2022-11-23 14:59:16,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:59:16,973 INFO L495 AbstractCegarLoop]: Abstraction has 4840 states and 6765 transitions. [2022-11-23 14:59:16,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-23 14:59:16,974 INFO L276 IsEmpty]: Start isEmpty. Operand 4840 states and 6765 transitions. [2022-11-23 14:59:16,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-23 14:59:16,976 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:59:16,976 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:59:16,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 14:59:16,977 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 14:59:16,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:59:16,978 INFO L85 PathProgramCache]: Analyzing trace with hash -430481766, now seen corresponding path program 1 times [2022-11-23 14:59:16,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:59:16,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449388117] [2022-11-23 14:59:16,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:59:16,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:59:17,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:59:17,396 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-11-23 14:59:17,397 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:59:17,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449388117] [2022-11-23 14:59:17,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449388117] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:59:17,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:59:17,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:59:17,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187240420] [2022-11-23 14:59:17,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:59:17,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:59:17,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:59:17,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:59:17,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:59:17,400 INFO L87 Difference]: Start difference. First operand 4840 states and 6765 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-23 14:59:19,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:59:23,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:59:23,636 INFO L93 Difference]: Finished difference Result 6249 states and 8622 transitions. [2022-11-23 14:59:23,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:59:23,637 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 79 [2022-11-23 14:59:23,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:59:23,723 INFO L225 Difference]: With dead ends: 6249 [2022-11-23 14:59:23,723 INFO L226 Difference]: Without dead ends: 6247 [2022-11-23 14:59:23,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:59:23,729 INFO L413 NwaCegarLoop]: 2672 mSDtfsCounter, 1388 mSDsluCounter, 7456 mSDsCounter, 0 mSdLazyCounter, 1328 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1393 SdHoareTripleChecker+Valid, 10128 SdHoareTripleChecker+Invalid, 1332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1328 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:59:23,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1393 Valid, 10128 Invalid, 1332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1328 Invalid, 1 Unknown, 0 Unchecked, 5.8s Time] [2022-11-23 14:59:23,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6247 states. [2022-11-23 14:59:24,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6247 to 6238. [2022-11-23 14:59:24,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6238 states, 3530 states have (on average 1.2492917847025495) internal successors, (4410), 3752 states have internal predecessors, (4410), 2090 states have call successors, (2090), 626 states have call predecessors, (2090), 615 states have return successors, (2113), 1967 states have call predecessors, (2113), 2081 states have call successors, (2113) [2022-11-23 14:59:24,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6238 states to 6238 states and 8613 transitions. [2022-11-23 14:59:24,154 INFO L78 Accepts]: Start accepts. Automaton has 6238 states and 8613 transitions. Word has length 79 [2022-11-23 14:59:24,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:59:24,156 INFO L495 AbstractCegarLoop]: Abstraction has 6238 states and 8613 transitions. [2022-11-23 14:59:24,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-23 14:59:24,156 INFO L276 IsEmpty]: Start isEmpty. Operand 6238 states and 8613 transitions. [2022-11-23 14:59:24,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-23 14:59:24,159 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:59:24,160 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:59:24,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 14:59:24,160 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 14:59:24,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:59:24,161 INFO L85 PathProgramCache]: Analyzing trace with hash -274071900, now seen corresponding path program 1 times [2022-11-23 14:59:24,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:59:24,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409846858] [2022-11-23 14:59:24,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:59:24,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:59:24,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:59:24,531 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-11-23 14:59:24,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:59:24,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409846858] [2022-11-23 14:59:24,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409846858] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:59:24,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:59:24,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:59:24,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258190188] [2022-11-23 14:59:24,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:59:24,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:59:24,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:59:24,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:59:24,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:59:24,535 INFO L87 Difference]: Start difference. First operand 6238 states and 8613 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-23 14:59:27,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:59:31,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:59:31,051 INFO L93 Difference]: Finished difference Result 6256 states and 8628 transitions. [2022-11-23 14:59:31,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:59:31,052 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 77 [2022-11-23 14:59:31,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:59:31,081 INFO L225 Difference]: With dead ends: 6256 [2022-11-23 14:59:31,082 INFO L226 Difference]: Without dead ends: 6254 [2022-11-23 14:59:31,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:59:31,087 INFO L413 NwaCegarLoop]: 2588 mSDtfsCounter, 1705 mSDsluCounter, 6812 mSDsCounter, 0 mSdLazyCounter, 1243 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1711 SdHoareTripleChecker+Valid, 9400 SdHoareTripleChecker+Invalid, 1245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1243 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:59:31,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1711 Valid, 9400 Invalid, 1245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1243 Invalid, 1 Unknown, 0 Unchecked, 6.1s Time] [2022-11-23 14:59:31,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6254 states. [2022-11-23 14:59:31,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6254 to 6250. [2022-11-23 14:59:31,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6250 states, 3539 states have (on average 1.248657812941509) internal successors, (4419), 3761 states have internal predecessors, (4419), 2090 states have call successors, (2090), 629 states have call predecessors, (2090), 618 states have return successors, (2113), 1967 states have call predecessors, (2113), 2081 states have call successors, (2113) [2022-11-23 14:59:31,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6250 states to 6250 states and 8622 transitions. [2022-11-23 14:59:31,567 INFO L78 Accepts]: Start accepts. Automaton has 6250 states and 8622 transitions. Word has length 77 [2022-11-23 14:59:31,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:59:31,568 INFO L495 AbstractCegarLoop]: Abstraction has 6250 states and 8622 transitions. [2022-11-23 14:59:31,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-23 14:59:31,568 INFO L276 IsEmpty]: Start isEmpty. Operand 6250 states and 8622 transitions. [2022-11-23 14:59:31,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-23 14:59:31,570 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:59:31,570 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:59:31,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 14:59:31,571 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 14:59:31,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:59:31,572 INFO L85 PathProgramCache]: Analyzing trace with hash 561236930, now seen corresponding path program 1 times [2022-11-23 14:59:31,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:59:31,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315046319] [2022-11-23 14:59:31,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:59:31,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:59:31,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:59:31,957 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-23 14:59:31,957 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:59:31,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315046319] [2022-11-23 14:59:31,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315046319] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:59:31,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:59:31,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:59:31,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839437237] [2022-11-23 14:59:31,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:59:31,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:59:31,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:59:31,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:59:31,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:59:31,960 INFO L87 Difference]: Start difference. First operand 6250 states and 8622 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-23 14:59:34,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:59:37,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:59:37,031 INFO L93 Difference]: Finished difference Result 6268 states and 8637 transitions. [2022-11-23 14:59:37,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:59:37,032 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 82 [2022-11-23 14:59:37,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:59:37,066 INFO L225 Difference]: With dead ends: 6268 [2022-11-23 14:59:37,067 INFO L226 Difference]: Without dead ends: 6266 [2022-11-23 14:59:37,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:59:37,073 INFO L413 NwaCegarLoop]: 2588 mSDtfsCounter, 1705 mSDsluCounter, 6812 mSDsCounter, 0 mSdLazyCounter, 1243 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1710 SdHoareTripleChecker+Valid, 9400 SdHoareTripleChecker+Invalid, 1245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1243 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:59:37,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1710 Valid, 9400 Invalid, 1245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1243 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2022-11-23 14:59:37,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6266 states. [2022-11-23 14:59:37,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6266 to 6262. [2022-11-23 14:59:37,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6262 states, 3548 states have (on average 1.2480270574971815) internal successors, (4428), 3770 states have internal predecessors, (4428), 2090 states have call successors, (2090), 632 states have call predecessors, (2090), 621 states have return successors, (2113), 1967 states have call predecessors, (2113), 2081 states have call successors, (2113) [2022-11-23 14:59:37,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6262 states to 6262 states and 8631 transitions. [2022-11-23 14:59:37,659 INFO L78 Accepts]: Start accepts. Automaton has 6262 states and 8631 transitions. Word has length 82 [2022-11-23 14:59:37,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:59:37,659 INFO L495 AbstractCegarLoop]: Abstraction has 6262 states and 8631 transitions. [2022-11-23 14:59:37,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-23 14:59:37,660 INFO L276 IsEmpty]: Start isEmpty. Operand 6262 states and 8631 transitions. [2022-11-23 14:59:37,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-23 14:59:37,663 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:59:37,663 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:59:37,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 14:59:37,664 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 14:59:37,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:59:37,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1441752796, now seen corresponding path program 1 times [2022-11-23 14:59:37,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:59:37,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686178971] [2022-11-23 14:59:37,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:59:37,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:59:37,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:59:38,034 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2022-11-23 14:59:38,034 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:59:38,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686178971] [2022-11-23 14:59:38,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686178971] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:59:38,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:59:38,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:59:38,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335771408] [2022-11-23 14:59:38,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:59:38,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:59:38,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:59:38,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:59:38,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:59:38,037 INFO L87 Difference]: Start difference. First operand 6262 states and 8631 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-23 14:59:40,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:59:43,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:59:43,193 INFO L93 Difference]: Finished difference Result 6280 states and 8646 transitions. [2022-11-23 14:59:43,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:59:43,194 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 87 [2022-11-23 14:59:43,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:59:43,229 INFO L225 Difference]: With dead ends: 6280 [2022-11-23 14:59:43,229 INFO L226 Difference]: Without dead ends: 6278 [2022-11-23 14:59:43,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:59:43,236 INFO L413 NwaCegarLoop]: 2588 mSDtfsCounter, 1705 mSDsluCounter, 6812 mSDsCounter, 0 mSdLazyCounter, 1243 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1709 SdHoareTripleChecker+Valid, 9400 SdHoareTripleChecker+Invalid, 1245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1243 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:59:43,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1709 Valid, 9400 Invalid, 1245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1243 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2022-11-23 14:59:43,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6278 states. [2022-11-23 14:59:43,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6278 to 6274. [2022-11-23 14:59:43,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6274 states, 3557 states have (on average 1.2473994939555806) internal successors, (4437), 3779 states have internal predecessors, (4437), 2090 states have call successors, (2090), 635 states have call predecessors, (2090), 624 states have return successors, (2113), 1967 states have call predecessors, (2113), 2081 states have call successors, (2113) [2022-11-23 14:59:43,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6274 states to 6274 states and 8640 transitions. [2022-11-23 14:59:43,775 INFO L78 Accepts]: Start accepts. Automaton has 6274 states and 8640 transitions. Word has length 87 [2022-11-23 14:59:43,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:59:43,776 INFO L495 AbstractCegarLoop]: Abstraction has 6274 states and 8640 transitions. [2022-11-23 14:59:43,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-23 14:59:43,776 INFO L276 IsEmpty]: Start isEmpty. Operand 6274 states and 8640 transitions. [2022-11-23 14:59:43,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-23 14:59:43,778 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:59:43,779 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:59:43,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 14:59:43,779 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 14:59:43,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:59:43,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1681657662, now seen corresponding path program 1 times [2022-11-23 14:59:43,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:59:43,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551971344] [2022-11-23 14:59:43,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:59:43,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:59:43,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:59:44,187 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-11-23 14:59:44,188 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:59:44,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551971344] [2022-11-23 14:59:44,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551971344] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:59:44,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:59:44,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:59:44,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136418862] [2022-11-23 14:59:44,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:59:44,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:59:44,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:59:44,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:59:44,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:59:44,191 INFO L87 Difference]: Start difference. First operand 6274 states and 8640 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 14:59:46,792 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:59:50,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:59:50,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:59:50,780 INFO L93 Difference]: Finished difference Result 6292 states and 8655 transitions. [2022-11-23 14:59:50,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:59:50,781 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 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 92 [2022-11-23 14:59:50,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:59:50,812 INFO L225 Difference]: With dead ends: 6292 [2022-11-23 14:59:50,812 INFO L226 Difference]: Without dead ends: 6288 [2022-11-23 14:59:50,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:59:50,819 INFO L413 NwaCegarLoop]: 2588 mSDtfsCounter, 1705 mSDsluCounter, 6812 mSDsCounter, 0 mSdLazyCounter, 1243 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1708 SdHoareTripleChecker+Valid, 9400 SdHoareTripleChecker+Invalid, 1245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1243 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:59:50,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1708 Valid, 9400 Invalid, 1245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1243 Invalid, 1 Unknown, 0 Unchecked, 6.1s Time] [2022-11-23 14:59:50,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6288 states. [2022-11-23 14:59:51,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6288 to 6284. [2022-11-23 14:59:51,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6284 states, 3565 states have (on average 1.2465638148667602) internal successors, (4444), 3786 states have internal predecessors, (4444), 2090 states have call successors, (2090), 638 states have call predecessors, (2090), 626 states have return successors, (2113), 1967 states have call predecessors, (2113), 2081 states have call successors, (2113) [2022-11-23 14:59:51,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6284 states to 6284 states and 8647 transitions. [2022-11-23 14:59:51,414 INFO L78 Accepts]: Start accepts. Automaton has 6284 states and 8647 transitions. Word has length 92 [2022-11-23 14:59:51,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:59:51,417 INFO L495 AbstractCegarLoop]: Abstraction has 6284 states and 8647 transitions. [2022-11-23 14:59:51,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 14:59:51,418 INFO L276 IsEmpty]: Start isEmpty. Operand 6284 states and 8647 transitions. [2022-11-23 14:59:51,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-23 14:59:51,422 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:59:51,423 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:59:51,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 14:59:51,423 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 14:59:51,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:59:51,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1669740439, now seen corresponding path program 1 times [2022-11-23 14:59:51,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:59:51,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090919780] [2022-11-23 14:59:51,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:59:51,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:59:51,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:59:52,223 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-11-23 14:59:52,223 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:59:52,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090919780] [2022-11-23 14:59:52,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090919780] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:59:52,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:59:52,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:59:52,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108208443] [2022-11-23 14:59:52,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:59:52,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:59:52,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:59:52,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:59:52,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:59:52,226 INFO L87 Difference]: Start difference. First operand 6284 states and 8647 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-23 14:59:54,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:59:58,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:59:58,172 INFO L93 Difference]: Finished difference Result 6303 states and 8662 transitions. [2022-11-23 14:59:58,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:59:58,173 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 109 [2022-11-23 14:59:58,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:59:58,207 INFO L225 Difference]: With dead ends: 6303 [2022-11-23 14:59:58,208 INFO L226 Difference]: Without dead ends: 6301 [2022-11-23 14:59:58,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:59:58,213 INFO L413 NwaCegarLoop]: 2671 mSDtfsCounter, 1386 mSDsluCounter, 7472 mSDsCounter, 0 mSdLazyCounter, 1320 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1388 SdHoareTripleChecker+Valid, 10143 SdHoareTripleChecker+Invalid, 1323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1320 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:59:58,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1388 Valid, 10143 Invalid, 1323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1320 Invalid, 1 Unknown, 0 Unchecked, 5.4s Time] [2022-11-23 14:59:58,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6301 states. [2022-11-23 14:59:58,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6301 to 6292. [2022-11-23 14:59:58,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6292 states, 3571 states have (on average 1.2455894707364883) internal successors, (4448), 3792 states have internal predecessors, (4448), 2090 states have call successors, (2090), 640 states have call predecessors, (2090), 628 states have return successors, (2113), 1967 states have call predecessors, (2113), 2081 states have call successors, (2113) [2022-11-23 14:59:58,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6292 states to 6292 states and 8651 transitions. [2022-11-23 14:59:58,847 INFO L78 Accepts]: Start accepts. Automaton has 6292 states and 8651 transitions. Word has length 109 [2022-11-23 14:59:58,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:59:58,850 INFO L495 AbstractCegarLoop]: Abstraction has 6292 states and 8651 transitions. [2022-11-23 14:59:58,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-23 14:59:58,850 INFO L276 IsEmpty]: Start isEmpty. Operand 6292 states and 8651 transitions. [2022-11-23 14:59:58,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-23 14:59:58,853 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:59:58,854 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:59:58,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-23 14:59:58,854 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 14:59:58,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:59:58,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1162462116, now seen corresponding path program 1 times [2022-11-23 14:59:58,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:59:58,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629860314] [2022-11-23 14:59:58,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:59:58,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:59:58,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:59:59,275 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2022-11-23 14:59:59,275 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:59:59,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629860314] [2022-11-23 14:59:59,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629860314] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:59:59,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:59:59,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:59:59,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41868486] [2022-11-23 14:59:59,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:59:59,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:59:59,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:59:59,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:59:59,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:59:59,278 INFO L87 Difference]: Start difference. First operand 6292 states and 8651 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-23 15:00:01,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:00:04,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:00:04,437 INFO L93 Difference]: Finished difference Result 6306 states and 8662 transitions. [2022-11-23 15:00:04,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:00:04,438 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 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 97 [2022-11-23 15:00:04,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:00:04,468 INFO L225 Difference]: With dead ends: 6306 [2022-11-23 15:00:04,469 INFO L226 Difference]: Without dead ends: 6151 [2022-11-23 15:00:04,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:00:04,475 INFO L413 NwaCegarLoop]: 2591 mSDtfsCounter, 1705 mSDsluCounter, 6818 mSDsCounter, 0 mSdLazyCounter, 1240 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1707 SdHoareTripleChecker+Valid, 9409 SdHoareTripleChecker+Invalid, 1242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1240 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:00:04,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1707 Valid, 9409 Invalid, 1242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1240 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2022-11-23 15:00:04,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6151 states. [2022-11-23 15:00:04,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6151 to 6147. [2022-11-23 15:00:04,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6147 states, 3487 states have (on average 1.2506452537998278) internal successors, (4361), 3706 states have internal predecessors, (4361), 2057 states have call successors, (2057), 611 states have call predecessors, (2057), 600 states have return successors, (2083), 1937 states have call predecessors, (2083), 2051 states have call successors, (2083) [2022-11-23 15:00:04,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6147 states to 6147 states and 8501 transitions. [2022-11-23 15:00:04,975 INFO L78 Accepts]: Start accepts. Automaton has 6147 states and 8501 transitions. Word has length 97 [2022-11-23 15:00:04,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:00:04,976 INFO L495 AbstractCegarLoop]: Abstraction has 6147 states and 8501 transitions. [2022-11-23 15:00:04,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-23 15:00:04,976 INFO L276 IsEmpty]: Start isEmpty. Operand 6147 states and 8501 transitions. [2022-11-23 15:00:04,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-23 15:00:04,981 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:00:04,982 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:00:04,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-23 15:00:04,982 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 15:00:04,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:00:04,983 INFO L85 PathProgramCache]: Analyzing trace with hash -107491879, now seen corresponding path program 1 times [2022-11-23 15:00:04,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:00:04,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110071716] [2022-11-23 15:00:04,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:00:04,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:00:05,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:00:05,746 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2022-11-23 15:00:05,747 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:00:05,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110071716] [2022-11-23 15:00:05,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110071716] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:00:05,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:00:05,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:00:05,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749847742] [2022-11-23 15:00:05,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:00:05,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:00:05,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:00:05,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:00:05,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:00:05,749 INFO L87 Difference]: Start difference. First operand 6147 states and 8501 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-23 15:00:08,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:00:10,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:00:10,696 INFO L93 Difference]: Finished difference Result 6457 states and 8839 transitions. [2022-11-23 15:00:10,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:00:10,697 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 146 [2022-11-23 15:00:10,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:00:10,733 INFO L225 Difference]: With dead ends: 6457 [2022-11-23 15:00:10,733 INFO L226 Difference]: Without dead ends: 6343 [2022-11-23 15:00:10,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:00:10,740 INFO L413 NwaCegarLoop]: 2416 mSDtfsCounter, 1330 mSDsluCounter, 6095 mSDsCounter, 0 mSdLazyCounter, 1313 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1331 SdHoareTripleChecker+Valid, 8511 SdHoareTripleChecker+Invalid, 1315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1313 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:00:10,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1331 Valid, 8511 Invalid, 1315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1313 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2022-11-23 15:00:10,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6343 states. [2022-11-23 15:00:11,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6343 to 6343. [2022-11-23 15:00:11,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6343 states, 3576 states have (on average 1.241890380313199) internal successors, (4441), 3796 states have internal predecessors, (4441), 2092 states have call successors, (2092), 683 states have call predecessors, (2092), 672 states have return successors, (2118), 1970 states have call predecessors, (2118), 2086 states have call successors, (2118) [2022-11-23 15:00:11,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6343 states to 6343 states and 8651 transitions. [2022-11-23 15:00:11,335 INFO L78 Accepts]: Start accepts. Automaton has 6343 states and 8651 transitions. Word has length 146 [2022-11-23 15:00:11,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:00:11,336 INFO L495 AbstractCegarLoop]: Abstraction has 6343 states and 8651 transitions. [2022-11-23 15:00:11,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-23 15:00:11,337 INFO L276 IsEmpty]: Start isEmpty. Operand 6343 states and 8651 transitions. [2022-11-23 15:00:11,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2022-11-23 15:00:11,348 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:00:11,348 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:00:11,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-23 15:00:11,349 INFO L420 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)] === [2022-11-23 15:00:11,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:00:11,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1338135142, now seen corresponding path program 1 times [2022-11-23 15:00:11,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:00:11,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380502719] [2022-11-23 15:00:11,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:00:11,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:00:11,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:00:11,877 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-11-23 15:00:11,877 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:00:11,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380502719] [2022-11-23 15:00:11,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380502719] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:00:11,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:00:11,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:00:11,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614913212] [2022-11-23 15:00:11,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:00:11,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:00:11,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:00:11,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:00:11,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:00:11,883 INFO L87 Difference]: Start difference. First operand 6343 states and 8651 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 3 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2022-11-23 15:00:14,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:00:15,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:00:15,854 INFO L93 Difference]: Finished difference Result 10745 states and 14600 transitions. [2022-11-23 15:00:15,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:00:15,856 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 3 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) Word has length 268 [2022-11-23 15:00:15,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:00:15,890 INFO L225 Difference]: With dead ends: 10745 [2022-11-23 15:00:15,890 INFO L226 Difference]: Without dead ends: 6289 [2022-11-23 15:00:15,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:00:15,912 INFO L413 NwaCegarLoop]: 2501 mSDtfsCounter, 1683 mSDsluCounter, 1656 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1684 SdHoareTripleChecker+Valid, 4157 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:00:15,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1684 Valid, 4157 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 557 Invalid, 1 Unknown, 0 Unchecked, 3.4s Time] [2022-11-23 15:00:15,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6289 states. [2022-11-23 15:00:16,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6289 to 6287. [2022-11-23 15:00:16,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6287 states, 3541 states have (on average 1.2400451849759955) internal successors, (4391), 3755 states have internal predecessors, (4391), 2071 states have call successors, (2071), 683 states have call predecessors, (2071), 672 states have return successors, (2088), 1952 states have call predecessors, (2088), 2065 states have call successors, (2088) [2022-11-23 15:00:16,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6287 states to 6287 states and 8550 transitions. [2022-11-23 15:00:16,483 INFO L78 Accepts]: Start accepts. Automaton has 6287 states and 8550 transitions. Word has length 268 [2022-11-23 15:00:16,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:00:16,483 INFO L495 AbstractCegarLoop]: Abstraction has 6287 states and 8550 transitions. [2022-11-23 15:00:16,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 3 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2022-11-23 15:00:16,484 INFO L276 IsEmpty]: Start isEmpty. Operand 6287 states and 8550 transitions. [2022-11-23 15:00:16,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2022-11-23 15:00:16,495 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:00:16,496 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:00:16,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-23 15:00:16,496 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 15:00:16,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:00:16,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1454608186, now seen corresponding path program 1 times [2022-11-23 15:00:16,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:00:16,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240969264] [2022-11-23 15:00:16,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:00:16,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:00:16,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:00:18,238 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2022-11-23 15:00:18,238 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:00:18,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240969264] [2022-11-23 15:00:18,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240969264] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:00:18,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748822964] [2022-11-23 15:00:18,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:00:18,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:00:18,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5a8611c-9fa3-41d0-b66a-6d3df502a55b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:00:18,245 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5a8611c-9fa3-41d0-b66a-6d3df502a55b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:00:18,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5a8611c-9fa3-41d0-b66a-6d3df502a55b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:00:20,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:00:20,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 4667 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:00:20,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:00:20,327 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2022-11-23 15:00:20,328 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:00:20,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748822964] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:00:20,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:00:20,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-11-23 15:00:20,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888274550] [2022-11-23 15:00:20,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:00:20,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:00:20,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:00:20,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:00:20,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:00:20,331 INFO L87 Difference]: Start difference. First operand 6287 states and 8550 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 2 states have call successors, (53), 2 states have call predecessors, (53), 2 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) [2022-11-23 15:00:23,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:00:24,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:00:24,633 INFO L93 Difference]: Finished difference Result 12586 states and 17134 transitions. [2022-11-23 15:00:24,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:00:24,634 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 2 states have call successors, (53), 2 states have call predecessors, (53), 2 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) Word has length 314 [2022-11-23 15:00:24,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:00:24,672 INFO L225 Difference]: With dead ends: 12586 [2022-11-23 15:00:24,672 INFO L226 Difference]: Without dead ends: 6313 [2022-11-23 15:00:24,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:00:24,713 INFO L413 NwaCegarLoop]: 2216 mSDtfsCounter, 7 mSDsluCounter, 2201 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 4417 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-23 15:00:24,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 4417 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 661 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2022-11-23 15:00:24,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6313 states. [2022-11-23 15:00:25,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6313 to 6295. [2022-11-23 15:00:25,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6295 states, 3549 states have (on average 1.2395040856579318) internal successors, (4399), 3763 states have internal predecessors, (4399), 2071 states have call successors, (2071), 683 states have call predecessors, (2071), 672 states have return successors, (2088), 1952 states have call predecessors, (2088), 2065 states have call successors, (2088) [2022-11-23 15:00:25,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6295 states to 6295 states and 8558 transitions. [2022-11-23 15:00:25,393 INFO L78 Accepts]: Start accepts. Automaton has 6295 states and 8558 transitions. Word has length 314 [2022-11-23 15:00:25,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:00:25,395 INFO L495 AbstractCegarLoop]: Abstraction has 6295 states and 8558 transitions. [2022-11-23 15:00:25,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 2 states have call successors, (53), 2 states have call predecessors, (53), 2 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) [2022-11-23 15:00:25,396 INFO L276 IsEmpty]: Start isEmpty. Operand 6295 states and 8558 transitions. [2022-11-23 15:00:25,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2022-11-23 15:00:25,409 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:00:25,410 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:00:25,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5a8611c-9fa3-41d0-b66a-6d3df502a55b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 15:00:25,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5a8611c-9fa3-41d0-b66a-6d3df502a55b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-23 15:00:25,627 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-23 15:00:25,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:00:25,628 INFO L85 PathProgramCache]: Analyzing trace with hash -765226284, now seen corresponding path program 1 times [2022-11-23 15:00:25,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:00:25,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180166933] [2022-11-23 15:00:25,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:00:25,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:00:25,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:00:27,433 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2022-11-23 15:00:27,434 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:00:27,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180166933] [2022-11-23 15:00:27,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180166933] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:00:27,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599234848] [2022-11-23 15:00:27,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:00:27,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:00:27,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5a8611c-9fa3-41d0-b66a-6d3df502a55b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:00:27,436 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5a8611c-9fa3-41d0-b66a-6d3df502a55b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:00:27,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5a8611c-9fa3-41d0-b66a-6d3df502a55b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 15:00:29,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:00:29,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 4805 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 15:00:29,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:00:29,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 15:00:29,752 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 119 proven. 2 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2022-11-23 15:00:29,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:00:30,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599234848] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:00:30,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [983152494] [2022-11-23 15:00:30,263 INFO L159 IcfgInterpreter]: Started Sifa with 199 locations of interest [2022-11-23 15:00:30,264 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:00:30,268 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:00:30,275 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:00:30,275 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:00:59,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-23 15:00:59,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-23 15:01:00,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-23 15:01:00,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 15:01:00,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 15:01:00,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:01:00,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2022-11-23 15:01:01,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:01:01,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 15:01:08,586 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_xmalloc with input of size 193 for LOIs [2022-11-23 15:01:08,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-23 15:01:08,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 15:01:08,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 15:01:08,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-23 15:01:09,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 15:01:09,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-23 15:01:09,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 15:01:09,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-23 15:01:09,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 15:01:09,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-23 15:01:10,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-23 15:01:10,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 15:01:10,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 15:01:10,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-23 15:01:10,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-23 15:01:10,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 15:01:10,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-23 15:01:10,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 15:01:10,960 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_is_err with input of size 205 for LOIs [2022-11-23 15:01:10,981 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_assume with input of size 184 for LOIs [2022-11-23 15:01:11,018 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_undef_int with input of size 2440 for LOIs [2022-11-23 15:01:17,708 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:03:06,767 WARN L233 SmtUtils]: Spent 1.80m on a formula simplification. DAG size of input: 2562 DAG size of output: 2542 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:04:42,410 WARN L233 SmtUtils]: Spent 1.58m on a formula simplification. DAG size of input: 2440 DAG size of output: 2418 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:06:27,249 WARN L233 SmtUtils]: Spent 1.73m on a formula simplification. DAG size of input: 2447 DAG size of output: 2426 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:06:58,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [983152494] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:06:58,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:06:58,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [7, 7] total 34 [2022-11-23 15:06:58,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020641761] [2022-11-23 15:06:58,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:06:58,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-23 15:06:58,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:06:58,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-23 15:06:58,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1266, Unknown=0, NotChecked=0, Total=1406 [2022-11-23 15:06:58,222 INFO L87 Difference]: Start difference. First operand 6295 states and 8558 transitions. Second operand has 24 states, 14 states have (on average 8.785714285714286) internal successors, (123), 13 states have internal predecessors, (123), 7 states have call successors, (55), 5 states have call predecessors, (55), 5 states have return successors, (51), 7 states have call predecessors, (51), 7 states have call successors, (51) [2022-11-23 15:08:52,612 WARN L233 SmtUtils]: Spent 1.89m on a formula simplification. DAG size of input: 2622 DAG size of output: 2555 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:10:46,118 WARN L233 SmtUtils]: Spent 1.88m on a formula simplification. DAG size of input: 2622 DAG size of output: 2555 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)