./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 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bf71003-9fa1-4178-a89c-dbb6489cada4/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bf71003-9fa1-4178-a89c-dbb6489cada4/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bf71003-9fa1-4178-a89c-dbb6489cada4/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bf71003-9fa1-4178-a89c-dbb6489cada4/bin/utaipan-eEHZpOm5b7/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_7bf71003-9fa1-4178-a89c-dbb6489cada4/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bf71003-9fa1-4178-a89c-dbb6489cada4/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 5afcd851c0eed3ee93d773a0172936a989a39cd6889ca2587c3b833a21bc8a3a --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:34:19,142 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:34:19,146 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:34:19,205 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:34:19,206 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:34:19,212 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:34:19,214 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:34:19,217 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:34:19,220 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:34:19,222 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:34:19,228 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:34:19,232 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:34:19,233 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:34:19,243 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:34:19,245 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:34:19,247 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:34:19,248 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:34:19,250 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:34:19,259 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:34:19,268 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:34:19,271 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:34:19,273 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:34:19,275 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:34:19,276 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:34:19,291 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:34:19,292 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:34:19,292 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:34:19,295 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:34:19,296 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:34:19,298 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:34:19,298 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:34:19,299 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:34:19,302 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:34:19,303 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:34:19,305 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:34:19,306 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:34:19,307 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:34:19,307 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:34:19,307 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:34:19,308 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:34:19,309 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:34:19,310 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bf71003-9fa1-4178-a89c-dbb6489cada4/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-25 18:34:19,357 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:34:19,357 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:34:19,358 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:34:19,358 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:34:19,359 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:34:19,359 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:34:19,359 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:34:19,360 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:34:19,360 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:34:19,360 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:34:19,360 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:34:19,361 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:34:19,361 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:34:19,361 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:34:19,362 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:34:19,362 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:34:19,362 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:34:19,362 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:34:19,363 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:34:19,364 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:34:19,364 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:34:19,364 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:34:19,365 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:34:19,365 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:34:19,365 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:34:19,365 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:34:19,366 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:34:19,366 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:34:19,366 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:34:19,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:34:19,367 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:34:19,367 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:34:19,368 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:34:19,368 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:34:19,368 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:34:19,369 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:34:19,369 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:34:19,369 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:34:19,370 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bf71003-9fa1-4178-a89c-dbb6489cada4/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bf71003-9fa1-4178-a89c-dbb6489cada4/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5afcd851c0eed3ee93d773a0172936a989a39cd6889ca2587c3b833a21bc8a3a [2021-11-25 18:34:19,655 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:34:19,680 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:34:19,683 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:34:19,685 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:34:19,686 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:34:19,688 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bf71003-9fa1-4178-a89c-dbb6489cada4/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i [2021-11-25 18:34:19,784 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bf71003-9fa1-4178-a89c-dbb6489cada4/bin/utaipan-eEHZpOm5b7/data/d3eadbb50/b016500bb28b497da93dfe538eaf8f29/FLAG4c836d91f [2021-11-25 18:34:20,888 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:34:20,889 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bf71003-9fa1-4178-a89c-dbb6489cada4/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i [2021-11-25 18:34:20,953 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bf71003-9fa1-4178-a89c-dbb6489cada4/bin/utaipan-eEHZpOm5b7/data/d3eadbb50/b016500bb28b497da93dfe538eaf8f29/FLAG4c836d91f [2021-11-25 18:34:21,203 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bf71003-9fa1-4178-a89c-dbb6489cada4/bin/utaipan-eEHZpOm5b7/data/d3eadbb50/b016500bb28b497da93dfe538eaf8f29 [2021-11-25 18:34:21,206 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:34:21,207 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:34:21,209 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:34:21,209 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:34:21,214 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:34:21,214 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:34:21" (1/1) ... [2021-11-25 18:34:21,216 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@208c9569 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:34:21, skipping insertion in model container [2021-11-25 18:34:21,216 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:34:21" (1/1) ... [2021-11-25 18:34:21,224 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:34:21,434 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:34:26,185 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bf71003-9fa1-4178-a89c-dbb6489cada4/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[410165,410178] [2021-11-25 18:34:26,189 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bf71003-9fa1-4178-a89c-dbb6489cada4/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[410334,410347] [2021-11-25 18:34:26,190 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bf71003-9fa1-4178-a89c-dbb6489cada4/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[410501,410514] [2021-11-25 18:34:26,191 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bf71003-9fa1-4178-a89c-dbb6489cada4/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[410669,410682] [2021-11-25 18:34:26,224 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:34:26,307 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:34:26,842 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bf71003-9fa1-4178-a89c-dbb6489cada4/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[410165,410178] [2021-11-25 18:34:26,843 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bf71003-9fa1-4178-a89c-dbb6489cada4/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[410334,410347] [2021-11-25 18:34:26,843 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bf71003-9fa1-4178-a89c-dbb6489cada4/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[410501,410514] [2021-11-25 18:34:26,844 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bf71003-9fa1-4178-a89c-dbb6489cada4/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[410669,410682] [2021-11-25 18:34:26,895 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:34:27,229 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:34:27,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:34:27 WrapperNode [2021-11-25 18:34:27,230 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:34:27,231 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:34:27,232 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:34:27,232 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:34:27,241 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:34:27" (1/1) ... [2021-11-25 18:34:27,453 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:34:27" (1/1) ... [2021-11-25 18:34:27,837 INFO L137 Inliner]: procedures = 541, calls = 2827, calls flagged for inlining = 282, calls inlined = 248, statements flattened = 7252 [2021-11-25 18:34:27,842 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:34:27,843 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:34:27,844 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:34:27,845 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:34:27,857 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:34:27" (1/1) ... [2021-11-25 18:34:27,857 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:34:27" (1/1) ... [2021-11-25 18:34:27,923 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:34:27" (1/1) ... [2021-11-25 18:34:27,926 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:34:27" (1/1) ... [2021-11-25 18:34:28,101 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:34:27" (1/1) ... [2021-11-25 18:34:28,130 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:34:27" (1/1) ... [2021-11-25 18:34:28,172 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:34:27" (1/1) ... [2021-11-25 18:34:28,223 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:34:28,225 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:34:28,225 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:34:28,225 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:34:28,227 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:34:27" (1/1) ... [2021-11-25 18:34:28,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:34:28,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bf71003-9fa1-4178-a89c-dbb6489cada4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:34:28,273 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bf71003-9fa1-4178-a89c-dbb6489cada4/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:34:28,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bf71003-9fa1-4178-a89c-dbb6489cada4/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:34:28,336 INFO L130 BoogieDeclarations]: Found specification of procedure mdio_write [2021-11-25 18:34:28,337 INFO L138 BoogieDeclarations]: Found implementation of procedure mdio_write [2021-11-25 18:34:28,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-25 18:34:28,337 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-25 18:34:28,337 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_alloc_skb [2021-11-25 18:34:28,337 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_alloc_skb [2021-11-25 18:34:28,338 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-25 18:34:28,338 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-25 18:34:28,338 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-25 18:34:28,338 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-25 18:34:28,338 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2021-11-25 18:34:28,339 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2021-11-25 18:34:28,339 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-25 18:34:28,339 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-25 18:34:28,339 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2021-11-25 18:34:28,340 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2021-11-25 18:34:28,340 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-11-25 18:34:28,340 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-11-25 18:34:28,340 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_63 [2021-11-25 18:34:28,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_63 [2021-11-25 18:34:28,341 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_interrupt [2021-11-25 18:34:28,341 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_interrupt [2021-11-25 18:34:28,341 INFO L130 BoogieDeclarations]: Found specification of procedure pci_name [2021-11-25 18:34:28,341 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_name [2021-11-25 18:34:28,341 INFO L130 BoogieDeclarations]: Found specification of procedure pci_get_drvdata [2021-11-25 18:34:28,342 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_get_drvdata [2021-11-25 18:34:28,342 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-25 18:34:28,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-25 18:34:28,343 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-11-25 18:34:28,344 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-11-25 18:34:28,344 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-25 18:34:28,344 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-25 18:34:28,345 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-25 18:34:28,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-25 18:34:28,345 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unmap_single [2021-11-25 18:34:28,345 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unmap_single [2021-11-25 18:34:28,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 18:34:28,346 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_dwio_write_bcr [2021-11-25 18:34:28,346 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_dwio_write_bcr [2021-11-25 18:34:28,346 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-25 18:34:28,346 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-25 18:34:28,347 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-11-25 18:34:28,347 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-11-25 18:34:28,348 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-25 18:34:28,349 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-25 18:34:28,349 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-25 18:34:28,349 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_netdev [2021-11-25 18:34:28,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_netdev [2021-11-25 18:34:28,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-25 18:34:28,350 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-25 18:34:28,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-25 18:34:28,350 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_purge_tx_ring [2021-11-25 18:34:28,351 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_purge_tx_ring [2021-11-25 18:34:28,351 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 18:34:28,352 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2021-11-25 18:34:28,352 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2021-11-25 18:34:28,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-25 18:34:28,353 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-25 18:34:28,353 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_wio_write_bcr [2021-11-25 18:34:28,353 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_wio_write_bcr [2021-11-25 18:34:28,353 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_interrupt_context [2021-11-25 18:34:28,353 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_interrupt_context [2021-11-25 18:34:28,353 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2021-11-25 18:34:28,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2021-11-25 18:34:28,354 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_err_code [2021-11-25 18:34:28,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_err_code [2021-11-25 18:34:28,354 INFO L130 BoogieDeclarations]: Found specification of procedure pci_free_consistent [2021-11-25 18:34:28,354 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_free_consistent [2021-11-25 18:34:28,355 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2021-11-25 18:34:28,355 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2021-11-25 18:34:28,355 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_netif_start [2021-11-25 18:34:28,355 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_netif_start [2021-11-25 18:34:28,355 INFO L130 BoogieDeclarations]: Found specification of procedure napi_enable [2021-11-25 18:34:28,356 INFO L138 BoogieDeclarations]: Found implementation of procedure napi_enable [2021-11-25 18:34:28,356 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~~u16~0 [2021-11-25 18:34:28,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~~u16~0 [2021-11-25 18:34:28,356 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-25 18:34:28,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-25 18:34:28,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 18:34:28,358 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mod_timer [2021-11-25 18:34:28,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mod_timer [2021-11-25 18:34:28,358 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_open [2021-11-25 18:34:28,358 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_open [2021-11-25 18:34:28,359 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:34:28,359 INFO L130 BoogieDeclarations]: Found specification of procedure is_valid_ether_addr [2021-11-25 18:34:28,360 INFO L138 BoogieDeclarations]: Found implementation of procedure is_valid_ether_addr [2021-11-25 18:34:28,360 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-25 18:34:28,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-25 18:34:28,360 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-25 18:34:28,360 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-25 18:34:28,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 18:34:28,361 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-25 18:34:28,361 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-25 18:34:28,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-25 18:34:28,362 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_wio_reset [2021-11-25 18:34:28,362 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_wio_reset [2021-11-25 18:34:28,362 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_lock_of_pcnet32_private [2021-11-25 18:34:28,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_lock_of_pcnet32_private [2021-11-25 18:34:28,362 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2021-11-25 18:34:28,363 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2021-11-25 18:34:28,363 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_restart [2021-11-25 18:34:28,363 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_restart [2021-11-25 18:34:28,364 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_spin_lock [2021-11-25 18:34:28,364 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_spin_lock [2021-11-25 18:34:28,365 INFO L130 BoogieDeclarations]: Found specification of procedure napi_disable [2021-11-25 18:34:28,365 INFO L138 BoogieDeclarations]: Found implementation of procedure napi_disable [2021-11-25 18:34:28,368 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-25 18:34:28,369 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-25 18:34:28,369 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2021-11-25 18:34:28,369 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2021-11-25 18:34:28,369 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2021-11-25 18:34:28,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2021-11-25 18:34:28,371 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_dwio_read_csr [2021-11-25 18:34:28,371 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_dwio_read_csr [2021-11-25 18:34:28,372 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~TO~VOID [2021-11-25 18:34:28,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~TO~VOID [2021-11-25 18:34:28,378 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-25 18:34:28,379 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-25 18:34:28,379 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_dwio_reset [2021-11-25 18:34:28,379 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_dwio_reset [2021-11-25 18:34:28,379 INFO L130 BoogieDeclarations]: Found specification of procedure mdio_read [2021-11-25 18:34:28,379 INFO L138 BoogieDeclarations]: Found implementation of procedure mdio_read [2021-11-25 18:34:28,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:34:28,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:34:28,380 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2021-11-25 18:34:28,380 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2021-11-25 18:34:28,380 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-25 18:34:28,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-25 18:34:28,380 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-25 18:34:28,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-25 18:34:28,381 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_pm_resume [2021-11-25 18:34:28,381 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_pm_resume [2021-11-25 18:34:28,381 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-25 18:34:28,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-25 18:34:28,381 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_check_media [2021-11-25 18:34:28,382 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_check_media [2021-11-25 18:34:28,382 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_get_regs_len [2021-11-25 18:34:28,382 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_get_regs_len [2021-11-25 18:34:28,382 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_size_call_parameter [2021-11-25 18:34:28,382 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_process_context [2021-11-25 18:34:28,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_process_context [2021-11-25 18:34:28,383 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_poll_controller [2021-11-25 18:34:28,383 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_poll_controller [2021-11-25 18:34:28,383 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_free_ring [2021-11-25 18:34:28,383 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_free_ring [2021-11-25 18:34:28,383 INFO L130 BoogieDeclarations]: Found specification of procedure pci_map_single [2021-11-25 18:34:28,384 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_map_single [2021-11-25 18:34:28,384 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-25 18:34:28,384 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-25 18:34:28,384 INFO L130 BoogieDeclarations]: Found specification of procedure kcalloc [2021-11-25 18:34:28,384 INFO L138 BoogieDeclarations]: Found implementation of procedure kcalloc [2021-11-25 18:34:28,384 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-25 18:34:28,385 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-25 18:34:28,385 INFO L130 BoogieDeclarations]: Found specification of procedure pci_alloc_consistent [2021-11-25 18:34:28,385 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_alloc_consistent [2021-11-25 18:34:28,385 INFO L130 BoogieDeclarations]: Found specification of procedure mii_ethtool_gset [2021-11-25 18:34:28,386 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_ethtool_gset [2021-11-25 18:34:28,386 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_purge_rx_ring [2021-11-25 18:34:28,386 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_purge_rx_ring [2021-11-25 18:34:28,387 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_dwio_write_csr [2021-11-25 18:34:28,387 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_dwio_write_csr [2021-11-25 18:34:28,387 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_tx_timeout [2021-11-25 18:34:28,388 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_tx_timeout [2021-11-25 18:34:28,388 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2021-11-25 18:34:28,388 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2021-11-25 18:34:28,388 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 18:34:28,388 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_netif_stop [2021-11-25 18:34:28,388 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_netif_stop [2021-11-25 18:34:28,389 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2021-11-25 18:34:28,389 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2021-11-25 18:34:28,389 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 18:34:28,389 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_lock_of_pcnet32_private [2021-11-25 18:34:28,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_lock_of_pcnet32_private [2021-11-25 18:34:28,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 18:34:28,390 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_wio_read_csr [2021-11-25 18:34:28,390 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_wio_read_csr [2021-11-25 18:34:28,390 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_set_multicast_list [2021-11-25 18:34:28,390 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_set_multicast_list [2021-11-25 18:34:28,390 INFO L130 BoogieDeclarations]: Found specification of procedure outw [2021-11-25 18:34:28,390 INFO L138 BoogieDeclarations]: Found implementation of procedure outw [2021-11-25 18:34:28,391 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-25 18:34:28,391 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-25 18:34:28,391 INFO L130 BoogieDeclarations]: Found specification of procedure mii_link_ok [2021-11-25 18:34:28,391 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_link_ok [2021-11-25 18:34:28,391 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-25 18:34:28,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-25 18:34:28,392 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_probe1 [2021-11-25 18:34:28,392 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_probe1 [2021-11-25 18:34:28,392 INFO L130 BoogieDeclarations]: Found specification of procedure outl [2021-11-25 18:34:28,392 INFO L138 BoogieDeclarations]: Found implementation of procedure outl [2021-11-25 18:34:28,392 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_irq [2021-11-25 18:34:28,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_irq [2021-11-25 18:34:28,393 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_remove_one [2021-11-25 18:34:28,393 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_remove_one [2021-11-25 18:34:28,393 INFO L130 BoogieDeclarations]: Found specification of procedure mii_ethtool_sset [2021-11-25 18:34:28,393 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_ethtool_sset [2021-11-25 18:34:28,393 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~X~~u16~0~TO~VOID [2021-11-25 18:34:28,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~X~~u16~0~TO~VOID [2021-11-25 18:34:28,394 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_dwio_read_bcr [2021-11-25 18:34:28,394 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_dwio_read_bcr [2021-11-25 18:34:28,394 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reserve [2021-11-25 18:34:28,394 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reserve [2021-11-25 18:34:28,394 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-11-25 18:34:28,394 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-11-25 18:34:28,395 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-25 18:34:28,395 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-25 18:34:28,395 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_wio_read_bcr [2021-11-25 18:34:28,395 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_wio_read_bcr [2021-11-25 18:34:28,395 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-25 18:34:28,396 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-25 18:34:28,396 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_init_ring [2021-11-25 18:34:28,396 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_init_ring [2021-11-25 18:34:28,396 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_close [2021-11-25 18:34:28,396 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_close [2021-11-25 18:34:28,396 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2021-11-25 18:34:28,397 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2021-11-25 18:34:28,397 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-25 18:34:28,397 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-25 18:34:28,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 18:34:28,397 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_suspend [2021-11-25 18:34:28,397 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_suspend [2021-11-25 18:34:28,398 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-25 18:34:28,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-25 18:34:28,398 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2021-11-25 18:34:28,398 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2021-11-25 18:34:28,398 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_any [2021-11-25 18:34:28,398 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_any [2021-11-25 18:34:28,399 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_wio_write_csr [2021-11-25 18:34:28,399 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_wio_write_csr [2021-11-25 18:34:28,399 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_load_multicast [2021-11-25 18:34:28,399 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_load_multicast [2021-11-25 18:34:28,399 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_stop_queue [2021-11-25 18:34:28,400 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_stop_queue [2021-11-25 18:34:28,405 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_nway_reset [2021-11-25 18:34:28,405 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_nway_reset [2021-11-25 18:34:28,405 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-25 18:34:28,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-25 18:34:28,405 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_power_state [2021-11-25 18:34:28,406 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_power_state [2021-11-25 18:34:28,406 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2021-11-25 18:34:28,406 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2021-11-25 18:34:28,406 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2021-11-25 18:34:28,407 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2021-11-25 18:34:28,409 INFO L130 BoogieDeclarations]: Found specification of procedure inl [2021-11-25 18:34:28,409 INFO L138 BoogieDeclarations]: Found implementation of procedure inl [2021-11-25 18:34:28,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:34:28,410 INFO L130 BoogieDeclarations]: Found specification of procedure __request_region [2021-11-25 18:34:28,410 INFO L138 BoogieDeclarations]: Found implementation of procedure __request_region [2021-11-25 18:34:28,410 INFO L130 BoogieDeclarations]: Found specification of procedure inw [2021-11-25 18:34:28,410 INFO L138 BoogieDeclarations]: Found implementation of procedure inw [2021-11-25 18:34:28,410 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-25 18:34:28,410 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-25 18:34:28,411 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_netdev [2021-11-25 18:34:28,411 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_netdev [2021-11-25 18:34:29,723 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:34:29,732 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:34:30,069 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-25 18:34:39,868 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:34:41,904 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:34:41,905 INFO L301 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-25 18:34:41,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:34:41 BoogieIcfgContainer [2021-11-25 18:34:41,912 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:34:41,914 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:34:41,915 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:34:41,919 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:34:41,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:34:21" (1/3) ... [2021-11-25 18:34:41,920 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6eed6c1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:34:41, skipping insertion in model container [2021-11-25 18:34:41,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:34:27" (2/3) ... [2021-11-25 18:34:41,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6eed6c1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:34:41, skipping insertion in model container [2021-11-25 18:34:41,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:34:41" (3/3) ... [2021-11-25 18:34:41,923 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i [2021-11-25 18:34:41,937 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:34:41,937 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-25 18:34:42,024 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:34:42,047 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 18:34:42,051 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-25 18:34:42,150 INFO L276 IsEmpty]: Start isEmpty. Operand has 1803 states, 1037 states have (on average 1.2835101253616201) internal successors, (1331), 1102 states have internal predecessors, (1331), 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) [2021-11-25 18:34:42,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-25 18:34:42,160 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:34:42,161 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:34:42,162 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 18:34:42,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:34:42,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1892068066, now seen corresponding path program 1 times [2021-11-25 18:34:42,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:34:42,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312619126] [2021-11-25 18:34:42,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:34:42,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:34:42,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:34:43,018 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 18:34:43,019 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:34:43,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312619126] [2021-11-25 18:34:43,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312619126] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:34:43,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:34:43,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:34:43,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517191621] [2021-11-25 18:34:43,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:34:43,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:34:43,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:34:43,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:34:43,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:34:43,094 INFO L87 Difference]: Start difference. First operand has 1803 states, 1037 states have (on average 1.2835101253616201) internal successors, (1331), 1102 states have internal predecessors, (1331), 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) [2021-11-25 18:34:45,863 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:34:49,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:34:49,686 INFO L93 Difference]: Finished difference Result 5283 states and 7847 transitions. [2021-11-25 18:34:49,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:34:49,690 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 [2021-11-25 18:34:49,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:34:49,766 INFO L225 Difference]: With dead ends: 5283 [2021-11-25 18:34:49,766 INFO L226 Difference]: Without dead ends: 3475 [2021-11-25 18:34:49,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:34:49,800 INFO L933 BasicCegarLoop]: 3427 mSDtfsCounter, 2463 mSDsluCounter, 10273 mSDsCounter, 0 mSdLazyCounter, 1642 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2476 SdHoareTripleChecker+Valid, 12512 SdHoareTripleChecker+Invalid, 1646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1642 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-11-25 18:34:49,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2476 Valid, 12512 Invalid, 1646 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3 Valid, 1642 Invalid, 1 Unknown, 0 Unchecked, 5.9s Time] [2021-11-25 18:34:49,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3475 states. [2021-11-25 18:34:50,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3475 to 3468. [2021-11-25 18:34:50,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3468 states, 1996 states have (on average 1.2740480961923848) internal successors, (2543), 2107 states have internal predecessors, (2543), 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) [2021-11-25 18:34:50,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3468 states to 3468 states and 5015 transitions. [2021-11-25 18:34:50,310 INFO L78 Accepts]: Start accepts. Automaton has 3468 states and 5015 transitions. Word has length 37 [2021-11-25 18:34:50,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:34:50,313 INFO L470 AbstractCegarLoop]: Abstraction has 3468 states and 5015 transitions. [2021-11-25 18:34:50,313 INFO L471 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) [2021-11-25 18:34:50,314 INFO L276 IsEmpty]: Start isEmpty. Operand 3468 states and 5015 transitions. [2021-11-25 18:34:50,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-25 18:34:50,328 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:34:50,329 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:34:50,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:34:50,330 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 18:34:50,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:34:50,332 INFO L85 PathProgramCache]: Analyzing trace with hash -547869959, now seen corresponding path program 1 times [2021-11-25 18:34:50,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:34:50,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813861843] [2021-11-25 18:34:50,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:34:50,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:34:50,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:34:50,658 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 18:34:50,659 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:34:50,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813861843] [2021-11-25 18:34:50,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813861843] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:34:50,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:34:50,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:34:50,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877508623] [2021-11-25 18:34:50,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:34:50,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:34:50,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:34:50,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:34:50,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:34:50,673 INFO L87 Difference]: Start difference. First operand 3468 states and 5015 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) [2021-11-25 18:34:53,205 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:34:55,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:34:55,738 INFO L93 Difference]: Finished difference Result 4804 states and 6736 transitions. [2021-11-25 18:34:55,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:34:55,740 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 [2021-11-25 18:34:55,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:34:55,790 INFO L225 Difference]: With dead ends: 4804 [2021-11-25 18:34:55,790 INFO L226 Difference]: Without dead ends: 4802 [2021-11-25 18:34:55,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:34:55,797 INFO L933 BasicCegarLoop]: 2596 mSDtfsCounter, 1705 mSDsluCounter, 7734 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1718 SdHoareTripleChecker+Valid, 9414 SdHoareTripleChecker+Invalid, 1277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:34:55,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1718 Valid, 9414 Invalid, 1277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1275 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2021-11-25 18:34:55,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4802 states. [2021-11-25 18:34:56,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4802 to 4798. [2021-11-25 18:34:56,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4798 states, 2739 states have (on average 1.254107338444688) internal successors, (3435), 2884 states have internal predecessors, (3435), 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) [2021-11-25 18:34:56,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4798 states to 4798 states and 6731 transitions. [2021-11-25 18:34:56,256 INFO L78 Accepts]: Start accepts. Automaton has 4798 states and 6731 transitions. Word has length 42 [2021-11-25 18:34:56,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:34:56,256 INFO L470 AbstractCegarLoop]: Abstraction has 4798 states and 6731 transitions. [2021-11-25 18:34:56,257 INFO L471 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) [2021-11-25 18:34:56,257 INFO L276 IsEmpty]: Start isEmpty. Operand 4798 states and 6731 transitions. [2021-11-25 18:34:56,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-25 18:34:56,265 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:34:56,265 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:34:56,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 18:34:56,267 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 18:34:56,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:34:56,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1951311301, now seen corresponding path program 1 times [2021-11-25 18:34:56,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:34:56,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918145522] [2021-11-25 18:34:56,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:34:56,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:34:56,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:34:56,620 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-25 18:34:56,620 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:34:56,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918145522] [2021-11-25 18:34:56,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918145522] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:34:56,621 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:34:56,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:34:56,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129791522] [2021-11-25 18:34:56,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:34:56,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:34:56,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:34:56,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:34:56,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:34:56,623 INFO L87 Difference]: Start difference. First operand 4798 states and 6731 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, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-25 18:34:59,107 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:35:02,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:35:02,188 INFO L93 Difference]: Finished difference Result 4812 states and 6742 transitions. [2021-11-25 18:35:02,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:35:02,190 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, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 54 [2021-11-25 18:35:02,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:35:02,244 INFO L225 Difference]: With dead ends: 4812 [2021-11-25 18:35:02,244 INFO L226 Difference]: Without dead ends: 4810 [2021-11-25 18:35:02,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:35:02,255 INFO L933 BasicCegarLoop]: 2596 mSDtfsCounter, 1700 mSDsluCounter, 7734 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1712 SdHoareTripleChecker+Valid, 9414 SdHoareTripleChecker+Invalid, 1277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:35:02,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1712 Valid, 9414 Invalid, 1277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1275 Invalid, 1 Unknown, 0 Unchecked, 5.2s Time] [2021-11-25 18:35:02,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4810 states. [2021-11-25 18:35:02,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4810 to 4806. [2021-11-25 18:35:02,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4806 states, 2745 states have (on average 1.2535519125683061) internal successors, (3441), 2890 states have internal predecessors, (3441), 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) [2021-11-25 18:35:02,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4806 states to 4806 states and 6737 transitions. [2021-11-25 18:35:02,734 INFO L78 Accepts]: Start accepts. Automaton has 4806 states and 6737 transitions. Word has length 54 [2021-11-25 18:35:02,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:35:02,737 INFO L470 AbstractCegarLoop]: Abstraction has 4806 states and 6737 transitions. [2021-11-25 18:35:02,737 INFO L471 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, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-25 18:35:02,738 INFO L276 IsEmpty]: Start isEmpty. Operand 4806 states and 6737 transitions. [2021-11-25 18:35:02,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-25 18:35:02,740 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:35:02,740 INFO L514 BasicCegarLoop]: 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] [2021-11-25 18:35:02,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 18:35:02,741 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 18:35:02,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:35:02,742 INFO L85 PathProgramCache]: Analyzing trace with hash 391296374, now seen corresponding path program 1 times [2021-11-25 18:35:02,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:35:02,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667372325] [2021-11-25 18:35:02,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:35:02,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:35:02,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:35:02,977 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-25 18:35:02,977 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:35:02,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667372325] [2021-11-25 18:35:02,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667372325] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:35:02,978 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:35:02,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:35:02,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046030754] [2021-11-25 18:35:02,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:35:02,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:35:02,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:35:02,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:35:02,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:35:02,980 INFO L87 Difference]: Start difference. First operand 4806 states and 6737 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) [2021-11-25 18:35:05,507 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:35:08,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:35:08,133 INFO L93 Difference]: Finished difference Result 4820 states and 6748 transitions. [2021-11-25 18:35:08,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:35:08,135 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 [2021-11-25 18:35:08,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:35:08,182 INFO L225 Difference]: With dead ends: 4820 [2021-11-25 18:35:08,183 INFO L226 Difference]: Without dead ends: 4818 [2021-11-25 18:35:08,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:35:08,193 INFO L933 BasicCegarLoop]: 2590 mSDtfsCounter, 1700 mSDsluCounter, 7722 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1711 SdHoareTripleChecker+Valid, 9396 SdHoareTripleChecker+Invalid, 1277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-11-25 18:35:08,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1711 Valid, 9396 Invalid, 1277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1275 Invalid, 1 Unknown, 0 Unchecked, 4.9s Time] [2021-11-25 18:35:08,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4818 states. [2021-11-25 18:35:08,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4818 to 4814. [2021-11-25 18:35:08,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4814 states, 2751 states have (on average 1.2529989094874592) internal successors, (3447), 2896 states have internal predecessors, (3447), 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) [2021-11-25 18:35:08,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4814 states to 4814 states and 6743 transitions. [2021-11-25 18:35:08,565 INFO L78 Accepts]: Start accepts. Automaton has 4814 states and 6743 transitions. Word has length 59 [2021-11-25 18:35:08,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:35:08,566 INFO L470 AbstractCegarLoop]: Abstraction has 4814 states and 6743 transitions. [2021-11-25 18:35:08,567 INFO L471 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) [2021-11-25 18:35:08,567 INFO L276 IsEmpty]: Start isEmpty. Operand 4814 states and 6743 transitions. [2021-11-25 18:35:08,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-25 18:35:08,570 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:35:08,570 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:35:08,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 18:35:08,571 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 18:35:08,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:35:08,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1467068638, now seen corresponding path program 1 times [2021-11-25 18:35:08,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:35:08,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138543319] [2021-11-25 18:35:08,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:35:08,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:35:08,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:35:08,884 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-25 18:35:08,884 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:35:08,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138543319] [2021-11-25 18:35:08,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138543319] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:35:08,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:35:08,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:35:08,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323579548] [2021-11-25 18:35:08,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:35:08,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:35:08,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:35:08,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:35:08,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:35:08,887 INFO L87 Difference]: Start difference. First operand 4814 states and 6743 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, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-25 18:35:11,403 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:35:14,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:35:14,030 INFO L93 Difference]: Finished difference Result 4828 states and 6754 transitions. [2021-11-25 18:35:14,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:35:14,031 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, (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 57 [2021-11-25 18:35:14,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:35:14,086 INFO L225 Difference]: With dead ends: 4828 [2021-11-25 18:35:14,086 INFO L226 Difference]: Without dead ends: 4826 [2021-11-25 18:35:14,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:35:14,093 INFO L933 BasicCegarLoop]: 2596 mSDtfsCounter, 1705 mSDsluCounter, 7734 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1715 SdHoareTripleChecker+Valid, 9414 SdHoareTripleChecker+Invalid, 1277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:35:14,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1715 Valid, 9414 Invalid, 1277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1275 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2021-11-25 18:35:14,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4826 states. [2021-11-25 18:35:14,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4826 to 4822. [2021-11-25 18:35:14,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4822 states, 2757 states have (on average 1.252448313384113) internal successors, (3453), 2902 states have internal predecessors, (3453), 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) [2021-11-25 18:35:14,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4822 states to 4822 states and 6749 transitions. [2021-11-25 18:35:14,466 INFO L78 Accepts]: Start accepts. Automaton has 4822 states and 6749 transitions. Word has length 57 [2021-11-25 18:35:14,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:35:14,468 INFO L470 AbstractCegarLoop]: Abstraction has 4822 states and 6749 transitions. [2021-11-25 18:35:14,469 INFO L471 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, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-25 18:35:14,469 INFO L276 IsEmpty]: Start isEmpty. Operand 4822 states and 6749 transitions. [2021-11-25 18:35:14,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-25 18:35:14,473 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:35:14,473 INFO L514 BasicCegarLoop]: 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] [2021-11-25 18:35:14,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 18:35:14,474 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 18:35:14,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:35:14,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1786994026, now seen corresponding path program 1 times [2021-11-25 18:35:14,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:35:14,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795352555] [2021-11-25 18:35:14,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:35:14,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:35:14,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:35:14,736 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-25 18:35:14,736 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:35:14,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795352555] [2021-11-25 18:35:14,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795352555] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:35:14,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:35:14,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:35:14,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243297887] [2021-11-25 18:35:14,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:35:14,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:35:14,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:35:14,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:35:14,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:35:14,741 INFO L87 Difference]: Start difference. First operand 4822 states and 6749 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) [2021-11-25 18:35:17,196 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:35:19,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:35:19,435 INFO L93 Difference]: Finished difference Result 4836 states and 6760 transitions. [2021-11-25 18:35:19,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:35:19,436 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 [2021-11-25 18:35:19,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:35:19,482 INFO L225 Difference]: With dead ends: 4836 [2021-11-25 18:35:19,482 INFO L226 Difference]: Without dead ends: 4834 [2021-11-25 18:35:19,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:35:19,487 INFO L933 BasicCegarLoop]: 2590 mSDtfsCounter, 1700 mSDsluCounter, 7722 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1709 SdHoareTripleChecker+Valid, 9396 SdHoareTripleChecker+Invalid, 1277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:35:19,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1709 Valid, 9396 Invalid, 1277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1275 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2021-11-25 18:35:19,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4834 states. [2021-11-25 18:35:19,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4834 to 4830. [2021-11-25 18:35:19,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4830 states, 2763 states have (on average 1.251900108577633) internal successors, (3459), 2908 states have internal predecessors, (3459), 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) [2021-11-25 18:35:19,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4830 states to 4830 states and 6755 transitions. [2021-11-25 18:35:19,806 INFO L78 Accepts]: Start accepts. Automaton has 4830 states and 6755 transitions. Word has length 69 [2021-11-25 18:35:19,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:35:19,807 INFO L470 AbstractCegarLoop]: Abstraction has 4830 states and 6755 transitions. [2021-11-25 18:35:19,807 INFO L471 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) [2021-11-25 18:35:19,807 INFO L276 IsEmpty]: Start isEmpty. Operand 4830 states and 6755 transitions. [2021-11-25 18:35:19,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-25 18:35:19,810 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:35:19,811 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:35:19,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 18:35:19,812 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 18:35:19,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:35:19,812 INFO L85 PathProgramCache]: Analyzing trace with hash -491918014, now seen corresponding path program 1 times [2021-11-25 18:35:19,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:35:19,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599397681] [2021-11-25 18:35:19,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:35:19,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:35:19,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:35:20,038 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-25 18:35:20,038 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:35:20,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599397681] [2021-11-25 18:35:20,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599397681] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:35:20,039 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:35:20,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:35:20,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877438302] [2021-11-25 18:35:20,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:35:20,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:35:20,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:35:20,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:35:20,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:35:20,042 INFO L87 Difference]: Start difference. First operand 4830 states and 6755 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) [2021-11-25 18:35:22,504 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:35:24,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:35:24,628 INFO L93 Difference]: Finished difference Result 4844 states and 6766 transitions. [2021-11-25 18:35:24,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:35:24,629 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 [2021-11-25 18:35:24,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:35:24,662 INFO L225 Difference]: With dead ends: 4844 [2021-11-25 18:35:24,663 INFO L226 Difference]: Without dead ends: 4842 [2021-11-25 18:35:24,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:35:24,669 INFO L933 BasicCegarLoop]: 2590 mSDtfsCounter, 1705 mSDsluCounter, 7722 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1713 SdHoareTripleChecker+Valid, 9396 SdHoareTripleChecker+Invalid, 1277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:35:24,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1713 Valid, 9396 Invalid, 1277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1275 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2021-11-25 18:35:24,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4842 states. [2021-11-25 18:35:24,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4842 to 4838. [2021-11-25 18:35:24,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4838 states, 2769 states have (on average 1.2513542795232937) internal successors, (3465), 2914 states have internal predecessors, (3465), 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) [2021-11-25 18:35:25,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4838 states to 4838 states and 6761 transitions. [2021-11-25 18:35:25,020 INFO L78 Accepts]: Start accepts. Automaton has 4838 states and 6761 transitions. Word has length 67 [2021-11-25 18:35:25,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:35:25,022 INFO L470 AbstractCegarLoop]: Abstraction has 4838 states and 6761 transitions. [2021-11-25 18:35:25,022 INFO L471 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) [2021-11-25 18:35:25,022 INFO L276 IsEmpty]: Start isEmpty. Operand 4838 states and 6761 transitions. [2021-11-25 18:35:25,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-25 18:35:25,025 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:35:25,025 INFO L514 BasicCegarLoop]: 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] [2021-11-25 18:35:25,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 18:35:25,026 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 18:35:25,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:35:25,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1393928266, now seen corresponding path program 1 times [2021-11-25 18:35:25,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:35:25,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729901694] [2021-11-25 18:35:25,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:35:25,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:35:25,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:35:25,321 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-25 18:35:25,322 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:35:25,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729901694] [2021-11-25 18:35:25,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729901694] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:35:25,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:35:25,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:35:25,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366208460] [2021-11-25 18:35:25,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:35:25,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:35:25,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:35:25,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:35:25,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:35:25,325 INFO L87 Difference]: Start difference. First operand 4838 states and 6761 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) [2021-11-25 18:35:27,795 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:35:30,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:35:30,229 INFO L93 Difference]: Finished difference Result 6246 states and 8616 transitions. [2021-11-25 18:35:30,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:35:30,230 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 [2021-11-25 18:35:30,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:35:30,275 INFO L225 Difference]: With dead ends: 6246 [2021-11-25 18:35:30,275 INFO L226 Difference]: Without dead ends: 6244 [2021-11-25 18:35:30,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:35:30,283 INFO L933 BasicCegarLoop]: 2662 mSDtfsCounter, 1386 mSDsluCounter, 8421 mSDsCounter, 0 mSdLazyCounter, 1359 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1391 SdHoareTripleChecker+Valid, 10089 SdHoareTripleChecker+Invalid, 1363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1359 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:35:30,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1391 Valid, 10089 Invalid, 1363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1359 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2021-11-25 18:35:30,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6244 states. [2021-11-25 18:35:30,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6244 to 6235. [2021-11-25 18:35:30,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6235 states, 3527 states have (on average 1.2486532463850297) internal successors, (4404), 3749 states have internal predecessors, (4404), 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) [2021-11-25 18:35:30,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6235 states to 6235 states and 8607 transitions. [2021-11-25 18:35:30,704 INFO L78 Accepts]: Start accepts. Automaton has 6235 states and 8607 transitions. Word has length 79 [2021-11-25 18:35:30,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:35:30,705 INFO L470 AbstractCegarLoop]: Abstraction has 6235 states and 8607 transitions. [2021-11-25 18:35:30,706 INFO L471 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) [2021-11-25 18:35:30,706 INFO L276 IsEmpty]: Start isEmpty. Operand 6235 states and 8607 transitions. [2021-11-25 18:35:30,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-25 18:35:30,709 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:35:30,709 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:35:30,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 18:35:30,710 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 18:35:30,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:35:30,710 INFO L85 PathProgramCache]: Analyzing trace with hash 661132130, now seen corresponding path program 1 times [2021-11-25 18:35:30,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:35:30,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645231310] [2021-11-25 18:35:30,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:35:30,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:35:30,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:35:30,972 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2021-11-25 18:35:30,972 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:35:30,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645231310] [2021-11-25 18:35:30,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645231310] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:35:30,973 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:35:30,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:35:30,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970492622] [2021-11-25 18:35:30,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:35:30,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:35:30,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:35:30,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:35:30,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:35:30,976 INFO L87 Difference]: Start difference. First operand 6235 states and 8607 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) [2021-11-25 18:35:33,387 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:35:35,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:35:35,523 INFO L93 Difference]: Finished difference Result 6253 states and 8622 transitions. [2021-11-25 18:35:35,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:35:35,523 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 [2021-11-25 18:35:35,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:35:35,562 INFO L225 Difference]: With dead ends: 6253 [2021-11-25 18:35:35,562 INFO L226 Difference]: Without dead ends: 6251 [2021-11-25 18:35:35,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:35:35,571 INFO L933 BasicCegarLoop]: 2578 mSDtfsCounter, 1705 mSDsluCounter, 7698 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1711 SdHoareTripleChecker+Valid, 9360 SdHoareTripleChecker+Invalid, 1277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:35:35,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1711 Valid, 9360 Invalid, 1277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1275 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2021-11-25 18:35:35,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6251 states. [2021-11-25 18:35:35,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6251 to 6247. [2021-11-25 18:35:35,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6247 states, 3536 states have (on average 1.2480203619909502) internal successors, (4413), 3758 states have internal predecessors, (4413), 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) [2021-11-25 18:35:35,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6247 states to 6247 states and 8616 transitions. [2021-11-25 18:35:35,980 INFO L78 Accepts]: Start accepts. Automaton has 6247 states and 8616 transitions. Word has length 77 [2021-11-25 18:35:35,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:35:35,981 INFO L470 AbstractCegarLoop]: Abstraction has 6247 states and 8616 transitions. [2021-11-25 18:35:35,982 INFO L471 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) [2021-11-25 18:35:35,982 INFO L276 IsEmpty]: Start isEmpty. Operand 6247 states and 8616 transitions. [2021-11-25 18:35:35,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-25 18:35:35,985 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:35:35,985 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 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] [2021-11-25 18:35:35,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 18:35:35,986 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 18:35:35,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:35:35,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1853762346, now seen corresponding path program 1 times [2021-11-25 18:35:35,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:35:35,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241858350] [2021-11-25 18:35:35,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:35:35,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:35:36,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:35:36,225 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-25 18:35:36,225 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:35:36,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241858350] [2021-11-25 18:35:36,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241858350] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:35:36,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:35:36,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:35:36,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840276857] [2021-11-25 18:35:36,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:35:36,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:35:36,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:35:36,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:35:36,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:35:36,228 INFO L87 Difference]: Start difference. First operand 6247 states and 8616 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, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-25 18:35:38,758 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:35:41,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:35:41,127 INFO L93 Difference]: Finished difference Result 6265 states and 8631 transitions. [2021-11-25 18:35:41,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:35:41,128 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, (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 89 [2021-11-25 18:35:41,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:35:41,166 INFO L225 Difference]: With dead ends: 6265 [2021-11-25 18:35:41,166 INFO L226 Difference]: Without dead ends: 6263 [2021-11-25 18:35:41,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:35:41,173 INFO L933 BasicCegarLoop]: 2578 mSDtfsCounter, 1700 mSDsluCounter, 7698 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1705 SdHoareTripleChecker+Valid, 9360 SdHoareTripleChecker+Invalid, 1277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:35:41,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1705 Valid, 9360 Invalid, 1277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1275 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2021-11-25 18:35:41,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6263 states. [2021-11-25 18:35:41,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6263 to 6259. [2021-11-25 18:35:41,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6259 states, 3545 states have (on average 1.2473906911142454) internal successors, (4422), 3767 states have internal predecessors, (4422), 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) [2021-11-25 18:35:41,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6259 states to 6259 states and 8625 transitions. [2021-11-25 18:35:41,593 INFO L78 Accepts]: Start accepts. Automaton has 6259 states and 8625 transitions. Word has length 89 [2021-11-25 18:35:41,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:35:41,593 INFO L470 AbstractCegarLoop]: Abstraction has 6259 states and 8625 transitions. [2021-11-25 18:35:41,594 INFO L471 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, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-25 18:35:41,594 INFO L276 IsEmpty]: Start isEmpty. Operand 6259 states and 8625 transitions. [2021-11-25 18:35:41,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-25 18:35:41,598 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:35:41,599 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:35:41,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 18:35:41,599 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 18:35:41,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:35:41,600 INFO L85 PathProgramCache]: Analyzing trace with hash -47005310, now seen corresponding path program 1 times [2021-11-25 18:35:41,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:35:41,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546616766] [2021-11-25 18:35:41,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:35:41,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:35:41,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:35:41,798 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2021-11-25 18:35:41,798 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:35:41,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546616766] [2021-11-25 18:35:41,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546616766] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:35:41,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:35:41,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:35:41,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278812849] [2021-11-25 18:35:41,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:35:41,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:35:41,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:35:41,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:35:41,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:35:41,802 INFO L87 Difference]: Start difference. First operand 6259 states and 8625 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) [2021-11-25 18:35:44,324 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:35:46,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:35:46,454 INFO L93 Difference]: Finished difference Result 6277 states and 8640 transitions. [2021-11-25 18:35:46,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:35:46,459 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 [2021-11-25 18:35:46,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:35:46,498 INFO L225 Difference]: With dead ends: 6277 [2021-11-25 18:35:46,499 INFO L226 Difference]: Without dead ends: 6275 [2021-11-25 18:35:46,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:35:46,507 INFO L933 BasicCegarLoop]: 2578 mSDtfsCounter, 1705 mSDsluCounter, 7698 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1709 SdHoareTripleChecker+Valid, 9360 SdHoareTripleChecker+Invalid, 1277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:35:46,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1709 Valid, 9360 Invalid, 1277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1275 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2021-11-25 18:35:46,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6275 states. [2021-11-25 18:35:46,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6275 to 6271. [2021-11-25 18:35:46,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6271 states, 3554 states have (on average 1.246764209341587) internal successors, (4431), 3776 states have internal predecessors, (4431), 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) [2021-11-25 18:35:46,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6271 states to 6271 states and 8634 transitions. [2021-11-25 18:35:46,946 INFO L78 Accepts]: Start accepts. Automaton has 6271 states and 8634 transitions. Word has length 87 [2021-11-25 18:35:46,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:35:46,947 INFO L470 AbstractCegarLoop]: Abstraction has 6271 states and 8634 transitions. [2021-11-25 18:35:46,947 INFO L471 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) [2021-11-25 18:35:46,947 INFO L276 IsEmpty]: Start isEmpty. Operand 6271 states and 8634 transitions. [2021-11-25 18:35:46,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-25 18:35:46,951 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:35:46,952 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:35:46,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 18:35:46,952 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 18:35:46,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:35:46,953 INFO L85 PathProgramCache]: Analyzing trace with hash -2014771256, now seen corresponding path program 1 times [2021-11-25 18:35:46,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:35:46,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505664272] [2021-11-25 18:35:46,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:35:46,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:35:47,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:35:47,288 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-25 18:35:47,288 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:35:47,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505664272] [2021-11-25 18:35:47,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505664272] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:35:47,289 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:35:47,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:35:47,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959390685] [2021-11-25 18:35:47,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:35:47,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:35:47,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:35:47,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:35:47,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:35:47,291 INFO L87 Difference]: Start difference. First operand 6271 states and 8634 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) [2021-11-25 18:35:49,750 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:35:51,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:35:51,769 INFO L93 Difference]: Finished difference Result 6290 states and 8649 transitions. [2021-11-25 18:35:51,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:35:51,769 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 [2021-11-25 18:35:51,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:35:51,807 INFO L225 Difference]: With dead ends: 6290 [2021-11-25 18:35:51,808 INFO L226 Difference]: Without dead ends: 6288 [2021-11-25 18:35:51,812 INFO L932 BasicCegarLoop]: 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 [2021-11-25 18:35:51,813 INFO L933 BasicCegarLoop]: 2661 mSDtfsCounter, 1384 mSDsluCounter, 8437 mSDsCounter, 0 mSdLazyCounter, 1351 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1386 SdHoareTripleChecker+Valid, 10104 SdHoareTripleChecker+Invalid, 1354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1351 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:35:51,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1386 Valid, 10104 Invalid, 1354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1351 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2021-11-25 18:35:51,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6288 states. [2021-11-25 18:35:52,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6288 to 6279. [2021-11-25 18:35:52,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6279 states, 3560 states have (on average 1.2457865168539326) internal successors, (4435), 3782 states have internal predecessors, (4435), 2090 states have call successors, (2090), 637 states have call predecessors, (2090), 626 states have return successors, (2113), 1967 states have call predecessors, (2113), 2081 states have call successors, (2113) [2021-11-25 18:35:52,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6279 states to 6279 states and 8638 transitions. [2021-11-25 18:35:52,226 INFO L78 Accepts]: Start accepts. Automaton has 6279 states and 8638 transitions. Word has length 109 [2021-11-25 18:35:52,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:35:52,227 INFO L470 AbstractCegarLoop]: Abstraction has 6279 states and 8638 transitions. [2021-11-25 18:35:52,228 INFO L471 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) [2021-11-25 18:35:52,228 INFO L276 IsEmpty]: Start isEmpty. Operand 6279 states and 8638 transitions. [2021-11-25 18:35:52,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-25 18:35:52,232 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:35:52,232 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:35:52,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-25 18:35:52,233 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 18:35:52,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:35:52,234 INFO L85 PathProgramCache]: Analyzing trace with hash -751557159, now seen corresponding path program 1 times [2021-11-25 18:35:52,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:35:52,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384617537] [2021-11-25 18:35:52,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:35:52,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:35:52,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:35:52,449 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-25 18:35:52,450 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:35:52,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384617537] [2021-11-25 18:35:52,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384617537] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:35:52,450 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:35:52,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:35:52,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838864181] [2021-11-25 18:35:52,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:35:52,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:35:52,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:35:52,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:35:52,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:35:52,453 INFO L87 Difference]: Start difference. First operand 6279 states and 8638 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) [2021-11-25 18:35:54,896 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:35:57,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:35:57,042 INFO L93 Difference]: Finished difference Result 6297 states and 8653 transitions. [2021-11-25 18:35:57,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:35:57,043 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 [2021-11-25 18:35:57,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:35:57,076 INFO L225 Difference]: With dead ends: 6297 [2021-11-25 18:35:57,077 INFO L226 Difference]: Without dead ends: 6293 [2021-11-25 18:35:57,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:35:57,081 INFO L933 BasicCegarLoop]: 2580 mSDtfsCounter, 1705 mSDsluCounter, 7702 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1708 SdHoareTripleChecker+Valid, 9366 SdHoareTripleChecker+Invalid, 1277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:35:57,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1708 Valid, 9366 Invalid, 1277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1275 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2021-11-25 18:35:57,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6293 states. [2021-11-25 18:35:57,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6293 to 6289. [2021-11-25 18:35:57,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6289 states, 3568 states have (on average 1.2449551569506727) internal successors, (4442), 3789 states have internal predecessors, (4442), 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) [2021-11-25 18:35:57,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6289 states to 6289 states and 8645 transitions. [2021-11-25 18:35:57,517 INFO L78 Accepts]: Start accepts. Automaton has 6289 states and 8645 transitions. Word has length 92 [2021-11-25 18:35:57,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:35:57,518 INFO L470 AbstractCegarLoop]: Abstraction has 6289 states and 8645 transitions. [2021-11-25 18:35:57,519 INFO L471 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) [2021-11-25 18:35:57,519 INFO L276 IsEmpty]: Start isEmpty. Operand 6289 states and 8645 transitions. [2021-11-25 18:35:57,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-25 18:35:57,524 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:35:57,524 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:35:57,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-25 18:35:57,525 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 18:35:57,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:35:57,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1962668635, now seen corresponding path program 1 times [2021-11-25 18:35:57,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:35:57,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450525853] [2021-11-25 18:35:57,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:35:57,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:35:57,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:35:57,738 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2021-11-25 18:35:57,738 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:35:57,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450525853] [2021-11-25 18:35:57,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450525853] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:35:57,739 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:35:57,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:35:57,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155516568] [2021-11-25 18:35:57,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:35:57,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:35:57,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:35:57,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:35:57,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:35:57,742 INFO L87 Difference]: Start difference. First operand 6289 states and 8645 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, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-25 18:36:00,208 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:36:03,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:36:03,030 INFO L93 Difference]: Finished difference Result 6303 states and 8656 transitions. [2021-11-25 18:36:03,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:36:03,032 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, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 104 [2021-11-25 18:36:03,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:36:03,061 INFO L225 Difference]: With dead ends: 6303 [2021-11-25 18:36:03,061 INFO L226 Difference]: Without dead ends: 6148 [2021-11-25 18:36:03,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:36:03,066 INFO L933 BasicCegarLoop]: 2581 mSDtfsCounter, 1700 mSDsluCounter, 7704 mSDsCounter, 0 mSdLazyCounter, 1272 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1702 SdHoareTripleChecker+Valid, 9369 SdHoareTripleChecker+Invalid, 1274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1272 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:36:03,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1702 Valid, 9369 Invalid, 1274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1272 Invalid, 1 Unknown, 0 Unchecked, 5.0s Time] [2021-11-25 18:36:03,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6148 states. [2021-11-25 18:36:03,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6148 to 6144. [2021-11-25 18:36:03,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6144 states, 3484 states have (on average 1.25) internal successors, (4355), 3703 states have internal predecessors, (4355), 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) [2021-11-25 18:36:03,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6144 states to 6144 states and 8495 transitions. [2021-11-25 18:36:03,510 INFO L78 Accepts]: Start accepts. Automaton has 6144 states and 8495 transitions. Word has length 104 [2021-11-25 18:36:03,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:36:03,511 INFO L470 AbstractCegarLoop]: Abstraction has 6144 states and 8495 transitions. [2021-11-25 18:36:03,511 INFO L471 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, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-25 18:36:03,511 INFO L276 IsEmpty]: Start isEmpty. Operand 6144 states and 8495 transitions. [2021-11-25 18:36:03,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-25 18:36:03,519 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:36:03,519 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:36:03,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-25 18:36:03,520 INFO L402 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)] === [2021-11-25 18:36:03,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:36:03,520 INFO L85 PathProgramCache]: Analyzing trace with hash 2047739557, now seen corresponding path program 1 times [2021-11-25 18:36:03,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:36:03,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396932654] [2021-11-25 18:36:03,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:36:03,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:36:03,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:36:03,798 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-11-25 18:36:03,798 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:36:03,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396932654] [2021-11-25 18:36:03,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396932654] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:36:03,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:36:03,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:36:03,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927672299] [2021-11-25 18:36:03,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:36:03,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:36:03,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:36:03,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:36:03,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:36:03,802 INFO L87 Difference]: Start difference. First operand 6144 states and 8495 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) [2021-11-25 18:36:06,421 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:36:08,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:36:08,453 INFO L93 Difference]: Finished difference Result 6454 states and 8833 transitions. [2021-11-25 18:36:08,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:36:08,454 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 [2021-11-25 18:36:08,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:36:08,489 INFO L225 Difference]: With dead ends: 6454 [2021-11-25 18:36:08,489 INFO L226 Difference]: Without dead ends: 6340 [2021-11-25 18:36:08,493 INFO L932 BasicCegarLoop]: 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 [2021-11-25 18:36:08,494 INFO L933 BasicCegarLoop]: 2405 mSDtfsCounter, 1330 mSDsluCounter, 7032 mSDsCounter, 0 mSdLazyCounter, 1341 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1331 SdHoareTripleChecker+Valid, 8475 SdHoareTripleChecker+Invalid, 1343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1341 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:36:08,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1331 Valid, 8475 Invalid, 1343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1341 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2021-11-25 18:36:08,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6340 states. [2021-11-25 18:36:08,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6340 to 6340. [2021-11-25 18:36:08,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6340 states, 3573 states have (on average 1.241253848306745) internal successors, (4435), 3793 states have internal predecessors, (4435), 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) [2021-11-25 18:36:08,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6340 states to 6340 states and 8645 transitions. [2021-11-25 18:36:08,932 INFO L78 Accepts]: Start accepts. Automaton has 6340 states and 8645 transitions. Word has length 146 [2021-11-25 18:36:08,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:36:08,933 INFO L470 AbstractCegarLoop]: Abstraction has 6340 states and 8645 transitions. [2021-11-25 18:36:08,933 INFO L471 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) [2021-11-25 18:36:08,933 INFO L276 IsEmpty]: Start isEmpty. Operand 6340 states and 8645 transitions. [2021-11-25 18:36:08,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2021-11-25 18:36:08,952 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:36:08,953 INFO L514 BasicCegarLoop]: 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] [2021-11-25 18:36:08,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-25 18:36:08,953 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-25 18:36:08,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:36:08,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1822842638, now seen corresponding path program 1 times [2021-11-25 18:36:08,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:36:08,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263678734] [2021-11-25 18:36:08,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:36:08,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:36:09,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:36:09,867 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2021-11-25 18:36:09,867 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:36:09,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263678734] [2021-11-25 18:36:09,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263678734] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:36:09,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375035617] [2021-11-25 18:36:09,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:36:09,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:36:09,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bf71003-9fa1-4178-a89c-dbb6489cada4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:36:09,873 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bf71003-9fa1-4178-a89c-dbb6489cada4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:36:09,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bf71003-9fa1-4178-a89c-dbb6489cada4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:36:11,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:36:11,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 4667 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:36:11,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:36:12,672 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2021-11-25 18:36:12,672 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:36:12,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375035617] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:36:12,673 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:36:12,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-11-25 18:36:12,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049469423] [2021-11-25 18:36:12,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:36:12,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:36:12,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:36:12,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:36:12,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:36:12,676 INFO L87 Difference]: Start difference. First operand 6340 states and 8645 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) [2021-11-25 18:36:15,114 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:36:16,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:36:16,663 INFO L93 Difference]: Finished difference Result 12690 states and 17332 transitions. [2021-11-25 18:36:16,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:36:16,664 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 [2021-11-25 18:36:16,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:36:16,712 INFO L225 Difference]: With dead ends: 12690 [2021-11-25 18:36:16,713 INFO L226 Difference]: Without dead ends: 6366 [2021-11-25 18:36:16,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:36:16,779 INFO L933 BasicCegarLoop]: 2237 mSDtfsCounter, 7 mSDsluCounter, 2547 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 4463 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:36:16,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 4463 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 673 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2021-11-25 18:36:16,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6366 states. [2021-11-25 18:36:17,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6366 to 6348. [2021-11-25 18:36:17,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6348 states, 3581 states have (on average 1.2407148841105837) internal successors, (4443), 3801 states have internal predecessors, (4443), 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) [2021-11-25 18:36:17,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6348 states to 6348 states and 8653 transitions. [2021-11-25 18:36:17,312 INFO L78 Accepts]: Start accepts. Automaton has 6348 states and 8653 transitions. Word has length 314 [2021-11-25 18:36:17,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:36:17,314 INFO L470 AbstractCegarLoop]: Abstraction has 6348 states and 8653 transitions. [2021-11-25 18:36:17,314 INFO L471 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) [2021-11-25 18:36:17,315 INFO L276 IsEmpty]: Start isEmpty. Operand 6348 states and 8653 transitions. [2021-11-25 18:36:17,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2021-11-25 18:36:17,333 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:36:17,333 INFO L514 BasicCegarLoop]: 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] [2021-11-25 18:36:17,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bf71003-9fa1-4178-a89c-dbb6489cada4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:36:17,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bf71003-9fa1-4178-a89c-dbb6489cada4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-25 18:36:17,556 INFO L402 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)] === [2021-11-25 18:36:17,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:36:17,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1981430277, now seen corresponding path program 1 times [2021-11-25 18:36:17,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:36:17,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216061581] [2021-11-25 18:36:17,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:36:17,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:36:17,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:36:18,390 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2021-11-25 18:36:18,391 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:36:18,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216061581] [2021-11-25 18:36:18,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216061581] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:36:18,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518891818] [2021-11-25 18:36:18,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:36:18,392 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:36:18,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bf71003-9fa1-4178-a89c-dbb6489cada4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:36:18,393 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bf71003-9fa1-4178-a89c-dbb6489cada4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:36:18,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bf71003-9fa1-4178-a89c-dbb6489cada4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:36:20,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:36:20,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 4805 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 18:36:20,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:36:20,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:36:21,256 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 119 proven. 2 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2021-11-25 18:36:21,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:36:22,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518891818] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:36:22,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1216824512] [2021-11-25 18:36:22,091 INFO L159 IcfgInterpreter]: Started Sifa with 199 locations of interest [2021-11-25 18:36:22,092 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:36:22,098 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:36:22,106 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:36:22,107 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:36:42,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:36:42,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:36:43,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:36:44,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:36:44,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:36:44,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:44,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:36:44,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:44,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:36:49,879 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_xmalloc with input of size 191 for LOIs [2021-11-25 18:36:49,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:36:49,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:36:50,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:36:50,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:36:50,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:36:50,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:36:50,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:36:50,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:36:51,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:36:51,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:36:51,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:36:51,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:36:51,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:36:51,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:36:51,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:36:51,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:36:51,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:36:51,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:36:52,106 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_is_err with input of size 203 for LOIs [2021-11-25 18:36:52,132 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_assume with input of size 184 for LOIs [2021-11-25 18:36:52,179 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_undef_int with input of size 2377 for LOIs [2021-11-25 18:36:56,141 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:42:00,631 WARN L227 SmtUtils]: Spent 5.06m on a formula simplification. DAG size of input: 2499 DAG size of output: 2479 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)