./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-ti-tlan.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs --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 23f9845edcf139ee9434428d040789a6781b16714bf615b854712f008daec6fd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:21:54,348 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:21:54,351 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:21:54,384 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:21:54,385 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:21:54,386 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:21:54,388 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:21:54,391 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:21:54,393 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:21:54,395 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:21:54,396 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:21:54,398 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:21:54,399 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:21:54,400 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:21:54,402 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:21:54,404 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:21:54,405 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:21:54,406 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:21:54,408 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:21:54,411 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:21:54,413 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:21:54,415 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:21:54,416 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:21:54,417 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:21:54,421 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:21:54,422 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:21:54,422 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:21:54,423 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:21:54,424 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:21:54,425 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:21:54,426 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:21:54,427 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:21:54,428 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:21:54,429 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:21:54,431 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:21:54,431 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:21:54,432 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:21:54,433 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:21:54,433 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:21:54,435 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:21:54,437 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:21:54,438 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-19 13:21:54,478 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:21:54,479 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:21:54,480 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:21:54,480 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:21:54,480 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:21:54,481 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:21:54,481 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:21:54,481 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 13:21:54,481 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:21:54,482 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:21:54,482 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 13:21:54,483 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 13:21:54,483 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:21:54,483 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 13:21:54,484 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 13:21:54,484 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 13:21:54,485 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:21:54,485 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 13:21:54,485 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:21:54,485 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:21:54,485 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:21:54,486 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:21:54,486 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:21:54,486 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:21:54,486 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:21:54,486 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:21:54,487 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:21:54,487 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:21:54,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:21:54,489 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:21:54,489 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:21:54,489 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:21:54,490 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 13:21:54,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 13:21:54,490 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:21:54,490 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:21:54,491 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:21:54,491 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_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23f9845edcf139ee9434428d040789a6781b16714bf615b854712f008daec6fd [2021-11-19 13:21:54,804 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:21:54,845 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:21:54,848 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:21:54,850 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:21:54,851 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:21:54,853 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i [2021-11-19 13:21:54,935 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/data/0f97976a8/02cff2f3c1184187a8c4ac870119e264/FLAGd4cbdc382 [2021-11-19 13:21:56,102 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:21:56,103 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i [2021-11-19 13:21:56,188 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/data/0f97976a8/02cff2f3c1184187a8c4ac870119e264/FLAGd4cbdc382 [2021-11-19 13:21:56,411 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/data/0f97976a8/02cff2f3c1184187a8c4ac870119e264 [2021-11-19 13:21:56,413 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:21:56,415 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:21:56,417 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:21:56,418 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:21:56,422 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:21:56,423 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:21:56" (1/1) ... [2021-11-19 13:21:56,424 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@660981a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:21:56, skipping insertion in model container [2021-11-19 13:21:56,424 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:21:56" (1/1) ... [2021-11-19 13:21:56,433 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:21:56,673 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:21:59,074 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 13:21:59,121 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 13:21:59,131 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 13:22:00,251 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_5948bc7f-decb-4dec-a444-420a3457ac89/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i[338234,338247] [2021-11-19 13:22:00,253 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_5948bc7f-decb-4dec-a444-420a3457ac89/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i[338403,338416] [2021-11-19 13:22:00,254 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_5948bc7f-decb-4dec-a444-420a3457ac89/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i[338570,338583] [2021-11-19 13:22:00,254 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_5948bc7f-decb-4dec-a444-420a3457ac89/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i[338738,338751] [2021-11-19 13:22:00,276 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:22:00,309 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-19 13:22:00,309 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6e53c6a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:22:00, skipping insertion in model container [2021-11-19 13:22:00,310 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:22:00,310 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 13:22:00,312 INFO L158 Benchmark]: Toolchain (without parser) took 3896.01ms. Allocated memory was 109.1MB in the beginning and 153.1MB in the end (delta: 44.0MB). Free memory was 57.7MB in the beginning and 90.3MB in the end (delta: -32.6MB). Peak memory consumption was 43.9MB. Max. memory is 16.1GB. [2021-11-19 13:22:00,313 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 109.1MB. Free memory was 88.8MB in the beginning and 88.7MB in the end (delta: 81.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 13:22:00,314 INFO L158 Benchmark]: CACSL2BoogieTranslator took 3892.77ms. Allocated memory was 109.1MB in the beginning and 153.1MB in the end (delta: 44.0MB). Free memory was 57.5MB in the beginning and 90.3MB in the end (delta: -32.8MB). Peak memory consumption was 43.9MB. Max. memory is 16.1GB. [2021-11-19 13:22:00,316 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 109.1MB. Free memory was 88.8MB in the beginning and 88.7MB in the end (delta: 81.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 3892.77ms. Allocated memory was 109.1MB in the beginning and 153.1MB in the end (delta: 44.0MB). Free memory was 57.5MB in the beginning and 90.3MB in the end (delta: -32.8MB). Peak memory consumption was 43.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 6411]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs --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 23f9845edcf139ee9434428d040789a6781b16714bf615b854712f008daec6fd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:22:02,936 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:22:02,943 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:22:03,023 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:22:03,024 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:22:03,030 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:22:03,033 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:22:03,039 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:22:03,044 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:22:03,058 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:22:03,060 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:22:03,063 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:22:03,064 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:22:03,068 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:22:03,070 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:22:03,074 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:22:03,080 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:22:03,082 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:22:03,085 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:22:03,094 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:22:03,097 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:22:03,100 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:22:03,102 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:22:03,103 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:22:03,108 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:22:03,108 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:22:03,109 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:22:03,111 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:22:03,111 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:22:03,113 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:22:03,114 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:22:03,115 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:22:03,116 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:22:03,118 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:22:03,119 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:22:03,120 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:22:03,121 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:22:03,121 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:22:03,122 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:22:03,123 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:22:03,124 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:22:03,125 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-19 13:22:03,157 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:22:03,158 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:22:03,159 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:22:03,159 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:22:03,160 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:22:03,160 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:22:03,160 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:22:03,161 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:22:03,161 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:22:03,161 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:22:03,162 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:22:03,163 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:22:03,163 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:22:03,163 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:22:03,164 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:22:03,164 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:22:03,164 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 13:22:03,165 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 13:22:03,165 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:22:03,165 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:22:03,165 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:22:03,166 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:22:03,166 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 13:22:03,166 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:22:03,167 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:22:03,167 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:22:03,167 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:22:03,168 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:22:03,168 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 13:22:03,168 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 13:22:03,169 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:22:03,169 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:22:03,169 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:22:03,170 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23f9845edcf139ee9434428d040789a6781b16714bf615b854712f008daec6fd [2021-11-19 13:22:03,637 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:22:03,668 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:22:03,671 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:22:03,673 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:22:03,674 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:22:03,676 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i [2021-11-19 13:22:03,773 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/data/e9e5366b1/51f4e2f590224a54a251fd07d39f0aca/FLAG98383d30c [2021-11-19 13:22:04,955 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:22:04,956 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i [2021-11-19 13:22:05,024 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/data/e9e5366b1/51f4e2f590224a54a251fd07d39f0aca/FLAG98383d30c [2021-11-19 13:22:05,216 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/data/e9e5366b1/51f4e2f590224a54a251fd07d39f0aca [2021-11-19 13:22:05,219 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:22:05,221 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:22:05,223 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:22:05,223 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:22:05,242 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:22:05,243 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:22:05" (1/1) ... [2021-11-19 13:22:05,245 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38748888 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:22:05, skipping insertion in model container [2021-11-19 13:22:05,245 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:22:05" (1/1) ... [2021-11-19 13:22:05,281 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:22:05,486 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:22:09,593 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_5948bc7f-decb-4dec-a444-420a3457ac89/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i[338234,338247] [2021-11-19 13:22:09,598 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_5948bc7f-decb-4dec-a444-420a3457ac89/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i[338403,338416] [2021-11-19 13:22:09,599 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_5948bc7f-decb-4dec-a444-420a3457ac89/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i[338570,338583] [2021-11-19 13:22:09,599 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_5948bc7f-decb-4dec-a444-420a3457ac89/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i[338738,338751] [2021-11-19 13:22:09,641 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:22:09,724 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 13:22:09,865 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:22:10,363 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_5948bc7f-decb-4dec-a444-420a3457ac89/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i[338234,338247] [2021-11-19 13:22:10,364 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_5948bc7f-decb-4dec-a444-420a3457ac89/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i[338403,338416] [2021-11-19 13:22:10,364 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_5948bc7f-decb-4dec-a444-420a3457ac89/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i[338570,338583] [2021-11-19 13:22:10,365 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_5948bc7f-decb-4dec-a444-420a3457ac89/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i[338738,338751] [2021-11-19 13:22:10,377 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:22:10,424 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 13:22:10,944 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_5948bc7f-decb-4dec-a444-420a3457ac89/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i[338234,338247] [2021-11-19 13:22:10,945 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_5948bc7f-decb-4dec-a444-420a3457ac89/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i[338403,338416] [2021-11-19 13:22:10,946 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_5948bc7f-decb-4dec-a444-420a3457ac89/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i[338570,338583] [2021-11-19 13:22:10,947 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_5948bc7f-decb-4dec-a444-420a3457ac89/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i[338738,338751] [2021-11-19 13:22:10,962 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:22:11,400 INFO L208 MainTranslator]: Completed translation [2021-11-19 13:22:11,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:22:11 WrapperNode [2021-11-19 13:22:11,401 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:22:11,403 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 13:22:11,404 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 13:22:11,404 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 13:22:11,414 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:22:11" (1/1) ... [2021-11-19 13:22:11,583 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:22:11" (1/1) ... [2021-11-19 13:22:11,968 INFO L137 Inliner]: procedures = 440, calls = 2260, calls flagged for inlining = 195, calls inlined = 179, statements flattened = 4687 [2021-11-19 13:22:11,969 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 13:22:11,971 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 13:22:11,971 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 13:22:11,971 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 13:22:11,983 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:22:11" (1/1) ... [2021-11-19 13:22:11,983 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:22:11" (1/1) ... [2021-11-19 13:22:12,019 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:22:11" (1/1) ... [2021-11-19 13:22:12,020 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:22:11" (1/1) ... [2021-11-19 13:22:12,223 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:22:11" (1/1) ... [2021-11-19 13:22:12,270 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:22:11" (1/1) ... [2021-11-19 13:22:12,307 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:22:11" (1/1) ... [2021-11-19 13:22:12,350 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 13:22:12,352 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 13:22:12,353 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 13:22:12,353 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 13:22:12,354 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:22:11" (1/1) ... [2021-11-19 13:22:12,363 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:22:12,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:22:12,397 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 13:22:12,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 13:22:12,464 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_resume [2021-11-19 13:22:12,465 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_resume [2021-11-19 13:22:12,465 INFO L130 BoogieDeclarations]: Found specification of procedure pci_release_regions [2021-11-19 13:22:12,465 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_release_regions [2021-11-19 13:22:12,465 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-19 13:22:12,466 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-19 13:22:12,466 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-19 13:22:12,466 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-19 13:22:12,466 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_mii_write_reg [2021-11-19 13:22:12,466 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_mii_write_reg [2021-11-19 13:22:12,467 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-19 13:22:12,467 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-19 13:22:12,467 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_timer_timer_instance_3 [2021-11-19 13:22:12,467 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_timer_timer_instance_3 [2021-11-19 13:22:12,467 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_dio_read8 [2021-11-19 13:22:12,468 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_dio_read8 [2021-11-19 13:22:12,468 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-19 13:22:12,468 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-19 13:22:12,468 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2021-11-19 13:22:12,468 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2021-11-19 13:22:12,469 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_63 [2021-11-19 13:22:12,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_63 [2021-11-19 13:22:12,469 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_lock_of_tlan_priv [2021-11-19 13:22:12,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_lock_of_tlan_priv [2021-11-19 13:22:12,470 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_read_and_clear_stats [2021-11-19 13:22:12,470 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_read_and_clear_stats [2021-11-19 13:22:12,470 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_mii_sync [2021-11-19 13:22:12,471 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_mii_sync [2021-11-19 13:22:12,471 INFO L130 BoogieDeclarations]: Found specification of procedure pci_get_drvdata [2021-11-19 13:22:12,471 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_get_drvdata [2021-11-19 13:22:12,472 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-19 13:22:12,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-19 13:22:12,472 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-19 13:22:12,472 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-19 13:22:12,472 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-19 13:22:12,473 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-19 13:22:12,473 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unmap_single [2021-11-19 13:22:12,473 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unmap_single [2021-11-19 13:22:12,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 13:22:12,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-19 13:22:12,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 13:22:12,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-19 13:22:12,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-19 13:22:12,476 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-19 13:22:12,477 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-19 13:22:12,477 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_reset_lists [2021-11-19 13:22:12,477 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_reset_lists [2021-11-19 13:22:12,477 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_close [2021-11-19 13:22:12,478 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_close [2021-11-19 13:22:12,478 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mod_timer_65 [2021-11-19 13:22:12,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mod_timer_65 [2021-11-19 13:22:12,479 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-19 13:22:12,480 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-19 13:22:12,480 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_phy_print [2021-11-19 13:22:12,480 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_phy_print [2021-11-19 13:22:12,480 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_netdev [2021-11-19 13:22:12,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_netdev [2021-11-19 13:22:12,481 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_lock_of_tlan_priv [2021-11-19 13:22:12,481 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_lock_of_tlan_priv [2021-11-19 13:22:12,481 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_pci_unregister_driver [2021-11-19 13:22:12,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_pci_unregister_driver [2021-11-19 13:22:12,483 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_probe1 [2021-11-19 13:22:12,483 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_probe1 [2021-11-19 13:22:12,483 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-19 13:22:12,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-19 13:22:12,484 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2021-11-19 13:22:12,484 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2021-11-19 13:22:12,484 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_interrupt_context [2021-11-19 13:22:12,484 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_interrupt_context [2021-11-19 13:22:12,484 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2021-11-19 13:22:12,485 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2021-11-19 13:22:12,485 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_err_code [2021-11-19 13:22:12,485 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_err_code [2021-11-19 13:22:12,485 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_set_timer [2021-11-19 13:22:12,486 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_set_timer [2021-11-19 13:22:12,487 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_timer [2021-11-19 13:22:12,487 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_timer [2021-11-19 13:22:12,487 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_timer_instance_callback_3_2 [2021-11-19 13:22:12,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_timer_instance_callback_3_2 [2021-11-19 13:22:12,488 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_stop [2021-11-19 13:22:12,488 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_stop [2021-11-19 13:22:12,489 INFO L130 BoogieDeclarations]: Found specification of procedure pci_free_consistent [2021-11-19 13:22:12,490 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_free_consistent [2021-11-19 13:22:12,490 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2021-11-19 13:22:12,490 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2021-11-19 13:22:12,490 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_remove_one [2021-11-19 13:22:12,490 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_remove_one [2021-11-19 13:22:12,491 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_get_skb [2021-11-19 13:22:12,491 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_get_skb [2021-11-19 13:22:12,491 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_ee_send_byte [2021-11-19 13:22:12,491 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_ee_send_byte [2021-11-19 13:22:12,491 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-19 13:22:12,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-19 13:22:12,492 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 13:22:12,492 INFO L130 BoogieDeclarations]: Found specification of procedure inb_p [2021-11-19 13:22:12,492 INFO L138 BoogieDeclarations]: Found implementation of procedure inb_p [2021-11-19 13:22:12,492 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_poll [2021-11-19 13:22:12,493 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_poll [2021-11-19 13:22:12,493 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mod_timer [2021-11-19 13:22:12,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mod_timer [2021-11-19 13:22:12,494 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 13:22:12,494 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-19 13:22:12,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-19 13:22:12,496 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-19 13:22:12,499 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-19 13:22:12,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 13:22:12,499 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-19 13:22:12,499 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-19 13:22:12,500 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-19 13:22:12,501 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_free_lists [2021-11-19 13:22:12,501 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_free_lists [2021-11-19 13:22:12,502 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_spin_lock [2021-11-19 13:22:12,502 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_spin_lock [2021-11-19 13:22:12,508 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-19 13:22:12,509 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-19 13:22:12,510 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2021-11-19 13:22:12,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2021-11-19 13:22:12,510 INFO L130 BoogieDeclarations]: Found specification of procedure outb_p [2021-11-19 13:22:12,510 INFO L138 BoogieDeclarations]: Found implementation of procedure outb_p [2021-11-19 13:22:12,511 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_store_skb [2021-11-19 13:22:12,511 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_store_skb [2021-11-19 13:22:12,511 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_tx_timeout [2021-11-19 13:22:12,511 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_tx_timeout [2021-11-19 13:22:12,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 13:22:12,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 13:22:12,512 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-19 13:22:12,512 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-19 13:22:12,512 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unregister_driver [2021-11-19 13:22:12,512 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unregister_driver [2021-11-19 13:22:12,513 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 13:22:12,513 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_phy_power_up [2021-11-19 13:22:12,513 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_phy_power_up [2021-11-19 13:22:12,513 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-19 13:22:12,513 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-19 13:22:12,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-19 13:22:12,514 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-19 13:22:12,514 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-19 13:22:12,514 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_off [2021-11-19 13:22:12,514 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_off [2021-11-19 13:22:12,514 INFO L130 BoogieDeclarations]: Found specification of procedure slow_down_io [2021-11-19 13:22:12,515 INFO L138 BoogieDeclarations]: Found implementation of procedure slow_down_io [2021-11-19 13:22:12,515 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_handle_interrupt [2021-11-19 13:22:12,515 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_handle_interrupt [2021-11-19 13:22:12,515 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_start [2021-11-19 13:22:12,515 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_start [2021-11-19 13:22:12,515 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_process_context [2021-11-19 13:22:12,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_process_context [2021-11-19 13:22:12,516 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_phy_finish_auto_neg [2021-11-19 13:22:12,516 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_phy_finish_auto_neg [2021-11-19 13:22:12,516 INFO L130 BoogieDeclarations]: Found specification of procedure pci_map_single [2021-11-19 13:22:12,516 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_map_single [2021-11-19 13:22:12,517 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-19 13:22:12,517 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-19 13:22:12,517 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_alloc_skb_ip_align [2021-11-19 13:22:12,517 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_alloc_skb_ip_align [2021-11-19 13:22:12,517 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_phy_start_link [2021-11-19 13:22:12,517 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_phy_start_link [2021-11-19 13:22:12,518 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 13:22:12,518 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_set_multicast_list [2021-11-19 13:22:12,519 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_set_multicast_list [2021-11-19 13:22:12,519 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2021-11-19 13:22:12,519 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2021-11-19 13:22:12,519 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 13:22:12,519 INFO L130 BoogieDeclarations]: Found specification of procedure add_timer [2021-11-19 13:22:12,520 INFO L138 BoogieDeclarations]: Found implementation of procedure add_timer [2021-11-19 13:22:12,520 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dispatch_instance_register_8_2 [2021-11-19 13:22:12,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dispatch_instance_register_8_2 [2021-11-19 13:22:12,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-19 13:22:12,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-19 13:22:12,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-19 13:22:12,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-19 13:22:12,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-19 13:22:12,521 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_print_list [2021-11-19 13:22:12,521 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_print_list [2021-11-19 13:22:12,521 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_dio_write16 [2021-11-19 13:22:12,522 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_dio_write16 [2021-11-19 13:22:12,522 INFO L130 BoogieDeclarations]: Found specification of procedure outw [2021-11-19 13:22:12,524 INFO L138 BoogieDeclarations]: Found implementation of procedure outw [2021-11-19 13:22:12,524 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-19 13:22:12,524 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-19 13:22:12,525 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2021-11-19 13:22:12,525 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2021-11-19 13:22:12,525 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-19 13:22:12,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-19 13:22:12,525 INFO L130 BoogieDeclarations]: Found specification of procedure outl [2021-11-19 13:22:12,525 INFO L138 BoogieDeclarations]: Found implementation of procedure outl [2021-11-19 13:22:12,526 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_finish_reset [2021-11-19 13:22:12,526 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_finish_reset [2021-11-19 13:22:12,526 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_dio_write32 [2021-11-19 13:22:12,526 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_dio_write32 [2021-11-19 13:22:12,526 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-11-19 13:22:12,527 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-11-19 13:22:12,527 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-19 13:22:12,527 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-19 13:22:12,527 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_set_mac [2021-11-19 13:22:12,527 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_set_mac [2021-11-19 13:22:12,527 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2021-11-19 13:22:12,528 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2021-11-19 13:22:12,528 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_ee_send_start [2021-11-19 13:22:12,528 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_ee_send_start [2021-11-19 13:22:12,528 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_dio_read32 [2021-11-19 13:22:12,528 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_dio_read32 [2021-11-19 13:22:12,528 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_dio_write8 [2021-11-19 13:22:12,529 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_dio_write8 [2021-11-19 13:22:12,529 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-19 13:22:12,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-19 13:22:12,529 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_phy_power_down [2021-11-19 13:22:12,529 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_phy_power_down [2021-11-19 13:22:12,529 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_any [2021-11-19 13:22:12,530 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_any [2021-11-19 13:22:12,530 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_reset_adapter [2021-11-19 13:22:12,530 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_reset_adapter [2021-11-19 13:22:12,530 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_mii_send_data [2021-11-19 13:22:12,530 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_mii_send_data [2021-11-19 13:22:12,531 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_phy_reset [2021-11-19 13:22:12,531 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_phy_reset [2021-11-19 13:22:12,531 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_mii_read_reg [2021-11-19 13:22:12,531 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_mii_read_reg [2021-11-19 13:22:12,531 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-19 13:22:12,531 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-19 13:22:12,532 INFO L130 BoogieDeclarations]: Found specification of procedure tlan_open [2021-11-19 13:22:12,532 INFO L138 BoogieDeclarations]: Found implementation of procedure tlan_open [2021-11-19 13:22:12,532 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_power_state [2021-11-19 13:22:12,532 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_power_state [2021-11-19 13:22:12,532 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2021-11-19 13:22:12,532 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2021-11-19 13:22:12,533 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~C_ULONG~TO~VOID [2021-11-19 13:22:12,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~C_ULONG~TO~VOID [2021-11-19 13:22:12,533 INFO L130 BoogieDeclarations]: Found specification of procedure inl [2021-11-19 13:22:12,533 INFO L138 BoogieDeclarations]: Found implementation of procedure inl [2021-11-19 13:22:12,535 INFO L130 BoogieDeclarations]: Found specification of procedure __request_region [2021-11-19 13:22:12,539 INFO L130 BoogieDeclarations]: Found specification of procedure inw [2021-11-19 13:22:12,540 INFO L138 BoogieDeclarations]: Found implementation of procedure inw [2021-11-19 13:22:12,540 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-19 13:22:12,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-19 13:22:12,540 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_netdev [2021-11-19 13:22:12,540 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_netdev [2021-11-19 13:22:12,541 INFO L130 BoogieDeclarations]: Found specification of procedure preempt_count [2021-11-19 13:22:12,541 INFO L138 BoogieDeclarations]: Found implementation of procedure preempt_count [2021-11-19 13:22:13,840 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 13:22:13,850 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 13:22:25,345 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-19 13:22:54,599 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6942: assume 0bv64 == ~bvadd64(tlan_eisa_probe_~tmp___1~5#1.base, tlan_eisa_probe_~tmp___1~5#1.offset); [2021-11-19 13:22:54,599 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6942: assume !(0bv64 == ~bvadd64(tlan_eisa_probe_~tmp___1~5#1.base, tlan_eisa_probe_~tmp___1~5#1.offset)); [2021-11-19 13:22:54,599 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L7042: assume ~bvsle64(tlan_eisa_probe_~ioaddr~0#1, 36863bv64); [2021-11-19 13:22:54,599 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L7042: assume !~bvsle64(tlan_eisa_probe_~ioaddr~0#1, 36863bv64); [2021-11-19 13:22:54,599 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6976-2: SUMMARY for call tlan_eisa_probe_#t~ret340#1 := inb(~bvadd32(3264bv32, tlan_eisa_probe_~ioaddr~0#1[32:0])); srcloc: null [2021-11-19 13:22:54,600 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6976: assume 16bv32 == ~debug~0;havoc tlan_eisa_probe_#t~nondet339#1; [2021-11-19 13:22:54,600 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6976: assume !(16bv32 == ~debug~0); [2021-11-19 13:22:54,600 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L7044: assume 0bv32 != ~bvand32(16bv32, ~debug~0); [2021-11-19 13:22:54,600 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L7044: assume !(0bv32 != ~bvand32(16bv32, ~debug~0)); [2021-11-19 13:22:54,600 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6947-1: tlan_eisa_probe_~tmp___2~2#1 := tlan_eisa_probe_#t~ret336#1;havoc tlan_eisa_probe_#t~ret336#1; [2021-11-19 13:22:54,600 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6947: SUMMARY for call tlan_eisa_probe_#t~ret336#1 := inw(~bvadd32(3200bv32, tlan_eisa_probe_~ioaddr~0#1[32:0])); srcloc: null [2021-11-19 13:22:54,600 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L7014: SUMMARY for call tlan_eisa_probe_#t~ret341#1 := tlan_probe1(0bv64, 0bv64, tlan_eisa_probe_~ioaddr~0#1, tlan_eisa_probe_~irq~0#1, 12bv32, 0bv64, 0bv64); srcloc: null [2021-11-19 13:22:54,600 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6949: assume 4366bv32 != ~zero_extendFrom16To32(tlan_eisa_probe_~tmp___2~2#1); [2021-11-19 13:22:54,601 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6949: assume !(4366bv32 != ~zero_extendFrom16To32(tlan_eisa_probe_~tmp___2~2#1)); [2021-11-19 13:22:54,601 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6983: tlan_eisa_probe_~tmp___4~0#1 := tlan_eisa_probe_#t~ret340#1;havoc tlan_eisa_probe_#t~ret340#1; [2021-11-19 13:22:54,601 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6951: SUMMARY for call __release_region(~#ioport_resource~0.base, ~#ioport_resource~0.offset, tlan_eisa_probe_~ioaddr~0#1, 16bv64); srcloc: null [2021-11-19 13:22:54,601 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6918-1: assume 0bv32 != ~bvand32(16bv32, ~debug~0); [2021-11-19 13:22:54,601 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6918-1: assume !(0bv32 != ~bvand32(16bv32, ~debug~0)); [2021-11-19 13:22:54,602 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6986: assume 16bv32 == ~zero_extendFrom8To32(tlan_eisa_probe_~tmp___4~0#1); [2021-11-19 13:22:54,602 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6986: assume !(16bv32 == ~zero_extendFrom8To32(tlan_eisa_probe_~tmp___4~0#1)); [2021-11-19 13:22:54,602 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6920-1: tlan_eisa_probe_~tmp~35#1 := tlan_eisa_probe_#t~ret330#1;havoc tlan_eisa_probe_#t~ret330#1;havoc tlan_eisa_probe_#t~nondet331#1; [2021-11-19 13:22:54,602 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6920: SUMMARY for call tlan_eisa_probe_#t~ret330#1 := inw(~bvadd32(3200bv32, tlan_eisa_probe_~ioaddr~0#1[32:0])); srcloc: null [2021-11-19 13:22:54,602 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6987: tlan_eisa_probe_~irq~0#1 := 5bv32; [2021-11-19 13:22:54,603 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L7021: tlan_eisa_probe_~rc~2#1 := tlan_eisa_probe_#t~ret341#1;havoc tlan_eisa_probe_#t~ret341#1; [2021-11-19 13:22:54,603 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6990: assume 32bv32 == ~zero_extendFrom8To32(tlan_eisa_probe_~tmp___4~0#1); [2021-11-19 13:22:54,603 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6990: assume !(32bv32 == ~zero_extendFrom8To32(tlan_eisa_probe_~tmp___4~0#1)); [2021-11-19 13:22:54,603 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6957-1: tlan_eisa_probe_~device_id~1#1 := tlan_eisa_probe_#t~ret337#1;havoc tlan_eisa_probe_#t~ret337#1; [2021-11-19 13:22:54,603 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6957: SUMMARY for call tlan_eisa_probe_#t~ret337#1 := inw(~bvadd32(3202bv32, tlan_eisa_probe_~ioaddr~0#1[32:0])); srcloc: null [2021-11-19 13:22:54,604 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6991: tlan_eisa_probe_~irq~0#1 := 9bv32; [2021-11-19 13:22:54,604 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6925-1: assume 0bv32 != ~bvand32(16bv32, ~debug~0);havoc tlan_eisa_probe_#t~nondet334#1; [2021-11-19 13:22:54,604 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6925-1: assume !(0bv32 != ~bvand32(16bv32, ~debug~0)); [2021-11-19 13:22:54,604 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6959: assume 8433bv32 != ~zero_extendFrom16To32(tlan_eisa_probe_~device_id~1#1) && 16625bv32 != ~zero_extendFrom16To32(tlan_eisa_probe_~device_id~1#1); [2021-11-19 13:22:54,604 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6959: assume !(8433bv32 != ~zero_extendFrom16To32(tlan_eisa_probe_~device_id~1#1) && 16625bv32 != ~zero_extendFrom16To32(tlan_eisa_probe_~device_id~1#1)); [2021-11-19 13:22:54,605 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6927-1: tlan_eisa_probe_~tmp___0~12#1 := tlan_eisa_probe_#t~ret332#1;havoc tlan_eisa_probe_#t~ret332#1;havoc tlan_eisa_probe_#t~nondet333#1; [2021-11-19 13:22:54,605 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6927: SUMMARY for call tlan_eisa_probe_#t~ret332#1 := inw(~bvadd32(3202bv32, tlan_eisa_probe_~ioaddr~0#1[32:0])); srcloc: null [2021-11-19 13:22:54,605 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6994: assume 64bv32 == ~zero_extendFrom8To32(tlan_eisa_probe_~tmp___4~0#1); [2021-11-19 13:22:54,605 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6994: assume !(64bv32 == ~zero_extendFrom8To32(tlan_eisa_probe_~tmp___4~0#1)); [2021-11-19 13:22:54,605 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6961: SUMMARY for call __release_region(~#ioport_resource~0.base, ~#ioport_resource~0.offset, tlan_eisa_probe_~ioaddr~0#1, 16bv64); srcloc: null [2021-11-19 13:22:54,606 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6995: tlan_eisa_probe_~irq~0#1 := 10bv32; [2021-11-19 13:22:54,606 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6998: assume 128bv32 == ~zero_extendFrom8To32(tlan_eisa_probe_~tmp___4~0#1); [2021-11-19 13:22:54,606 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6998: assume !(128bv32 == ~zero_extendFrom8To32(tlan_eisa_probe_~tmp___4~0#1)); [2021-11-19 13:22:54,606 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6932-1: call tlan_eisa_probe_#t~ret335#1.base, tlan_eisa_probe_#t~ret335#1.offset := __request_region(~#ioport_resource~0.base, ~#ioport_resource~0.offset, tlan_eisa_probe_~ioaddr~0#1, 16bv64, ~#tlan_signature~0.base, ~#tlan_signature~0.offset, 0bv32);tlan_eisa_probe_~tmp___1~5#1.base, tlan_eisa_probe_~tmp___1~5#1.offset := tlan_eisa_probe_#t~ret335#1.base, tlan_eisa_probe_#t~ret335#1.offset;havoc tlan_eisa_probe_#t~ret335#1.base, tlan_eisa_probe_#t~ret335#1.offset; [2021-11-19 13:22:54,606 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6999: tlan_eisa_probe_~irq~0#1 := 11bv32; [2021-11-19 13:22:54,607 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6967-1: tlan_eisa_probe_~tmp___3~1#1 := tlan_eisa_probe_#t~ret338#1;havoc tlan_eisa_probe_#t~ret338#1; [2021-11-19 13:22:54,607 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6967: SUMMARY for call tlan_eisa_probe_#t~ret338#1 := inb(~bvadd32(3204bv32, tlan_eisa_probe_~ioaddr~0#1[32:0])); srcloc: null [2021-11-19 13:22:54,607 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L7033-1: tlan_eisa_probe_~ioaddr~0#1 := ~bvadd64(4096bv64, tlan_eisa_probe_~ioaddr~0#1); [2021-11-19 13:22:54,607 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L7002: assume 16bv32 == ~debug~0;havoc tlan_eisa_probe_#t~nondet342#1; [2021-11-19 13:22:54,607 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L7002: assume !(16bv32 == ~debug~0); [2021-11-19 13:22:54,608 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6969: assume 1bv32 != ~zero_extendFrom8To32(tlan_eisa_probe_~tmp___3~1#1); [2021-11-19 13:22:54,608 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6969: assume !(1bv32 != ~zero_extendFrom8To32(tlan_eisa_probe_~tmp___3~1#1)); [2021-11-19 13:22:54,608 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6971-1: assume 16bv32 == ~debug~0;havoc tlan_eisa_probe_#t~nondet343#1; [2021-11-19 13:22:54,608 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6971-1: assume !(16bv32 == ~debug~0); [2021-11-19 13:22:54,608 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L6971: SUMMARY for call __release_region(~#ioport_resource~0.base, ~#ioport_resource~0.offset, tlan_eisa_probe_~ioaddr~0#1, 16bv64); srcloc: null [2021-11-19 13:22:54,707 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 13:22:54,729 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 13:22:54,729 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 13:22:54,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:22:54 BoogieIcfgContainer [2021-11-19 13:22:54,736 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 13:22:54,737 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 13:22:54,738 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 13:22:54,741 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 13:22:54,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:22:05" (1/3) ... [2021-11-19 13:22:54,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15b96ba7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:22:54, skipping insertion in model container [2021-11-19 13:22:54,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:22:11" (2/3) ... [2021-11-19 13:22:54,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15b96ba7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:22:54, skipping insertion in model container [2021-11-19 13:22:54,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:22:54" (3/3) ... [2021-11-19 13:22:54,745 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-ti-tlan.cil.i [2021-11-19 13:22:54,751 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 13:22:54,752 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-19 13:22:54,848 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 13:22:54,854 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 [2021-11-19 13:22:54,854 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-19 13:22:54,935 INFO L276 IsEmpty]: Start isEmpty. Operand has 1990 states, 1278 states have (on average 1.2519561815336464) internal successors, (1600), 1334 states have internal predecessors, (1600), 601 states have call successors, (601), 108 states have call predecessors, (601), 107 states have return successors, (597), 579 states have call predecessors, (597), 597 states have call successors, (597) [2021-11-19 13:22:54,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-19 13:22:54,949 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:22:54,950 INFO L514 BasicCegarLoop]: trace histogram [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, 1] [2021-11-19 13:22:54,950 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)] === [2021-11-19 13:22:54,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:22:54,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1354900798, now seen corresponding path program 1 times [2021-11-19 13:22:54,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:22:54,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1190097150] [2021-11-19 13:22:54,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:22:54,979 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:22:54,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:22:54,982 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:22:54,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 13:22:56,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:22:56,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 1405 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:22:56,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:22:57,288 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 13:22:57,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:22:57,556 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 13:22:57,557 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:22:57,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1190097150] [2021-11-19 13:22:57,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1190097150] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:22:57,558 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:22:57,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 4 [2021-11-19 13:22:57,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638558550] [2021-11-19 13:22:57,561 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:22:57,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:22:57,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:22:57,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:22:57,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:22:57,608 INFO L87 Difference]: Start difference. First operand has 1990 states, 1278 states have (on average 1.2519561815336464) internal successors, (1600), 1334 states have internal predecessors, (1600), 601 states have call successors, (601), 108 states have call predecessors, (601), 107 states have return successors, (597), 579 states have call predecessors, (597), 597 states have call successors, (597) Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-19 13:22:59,787 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:23:05,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:23:05,863 INFO L93 Difference]: Finished difference Result 6718 states and 9818 transitions. [2021-11-19 13:23:05,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:23:05,866 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 52 [2021-11-19 13:23:05,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:23:05,947 INFO L225 Difference]: With dead ends: 6718 [2021-11-19 13:23:05,947 INFO L226 Difference]: Without dead ends: 4715 [2021-11-19 13:23:05,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:23:06,000 INFO L933 BasicCegarLoop]: 4234 mSDtfsCounter, 3814 mSDsluCounter, 6070 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 33 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3814 SdHoareTripleChecker+Valid, 10304 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2021-11-19 13:23:06,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3814 Valid, 10304 Invalid, 856 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [33 Valid, 822 Invalid, 1 Unknown, 0 Unchecked, 7.5s Time] [2021-11-19 13:23:06,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4715 states. [2021-11-19 13:23:06,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4715 to 4646. [2021-11-19 13:23:06,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4646 states, 2973 states have (on average 1.229061553985873) internal successors, (3654), 3100 states have internal predecessors, (3654), 1393 states have call successors, (1393), 278 states have call predecessors, (1393), 277 states have return successors, (1399), 1342 states have call predecessors, (1399), 1390 states have call successors, (1399) [2021-11-19 13:23:06,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4646 states to 4646 states and 6446 transitions. [2021-11-19 13:23:06,607 INFO L78 Accepts]: Start accepts. Automaton has 4646 states and 6446 transitions. Word has length 52 [2021-11-19 13:23:06,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:23:06,608 INFO L470 AbstractCegarLoop]: Abstraction has 4646 states and 6446 transitions. [2021-11-19 13:23:06,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-19 13:23:06,608 INFO L276 IsEmpty]: Start isEmpty. Operand 4646 states and 6446 transitions. [2021-11-19 13:23:06,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-19 13:23:06,620 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:23:06,622 INFO L514 BasicCegarLoop]: trace histogram [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, 1] [2021-11-19 13:23:06,677 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-19 13:23:06,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:23:06,835 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)] === [2021-11-19 13:23:06,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:23:06,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1370419516, now seen corresponding path program 1 times [2021-11-19 13:23:06,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:23:06,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1061575554] [2021-11-19 13:23:06,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:06,840 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:23:06,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:23:06,844 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:23:06,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 13:23:08,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:08,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 1405 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:23:08,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:23:09,341 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 13:23:09,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:23:09,822 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 13:23:09,823 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:23:09,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1061575554] [2021-11-19 13:23:09,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1061575554] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:23:09,823 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:23:09,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 7 [2021-11-19 13:23:09,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077939330] [2021-11-19 13:23:09,824 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:23:09,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:23:09,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:23:09,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:23:09,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:23:09,826 INFO L87 Difference]: Start difference. First operand 4646 states and 6446 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-19 13:23:10,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:23:10,480 INFO L93 Difference]: Finished difference Result 4652 states and 6451 transitions. [2021-11-19 13:23:10,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:23:10,481 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 52 [2021-11-19 13:23:10,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:23:10,534 INFO L225 Difference]: With dead ends: 4652 [2021-11-19 13:23:10,535 INFO L226 Difference]: Without dead ends: 4650 [2021-11-19 13:23:10,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:23:10,541 INFO L933 BasicCegarLoop]: 2765 mSDtfsCounter, 2731 mSDsluCounter, 5518 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2742 SdHoareTripleChecker+Valid, 8283 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:23:10,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2742 Valid, 8283 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:23:10,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4650 states. [2021-11-19 13:23:10,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4650 to 4650. [2021-11-19 13:23:10,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4650 states, 2976 states have (on average 1.2288306451612903) internal successors, (3657), 3103 states have internal predecessors, (3657), 1393 states have call successors, (1393), 279 states have call predecessors, (1393), 278 states have return successors, (1399), 1342 states have call predecessors, (1399), 1390 states have call successors, (1399) [2021-11-19 13:23:10,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4650 states to 4650 states and 6449 transitions. [2021-11-19 13:23:10,923 INFO L78 Accepts]: Start accepts. Automaton has 4650 states and 6449 transitions. Word has length 52 [2021-11-19 13:23:10,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:23:10,924 INFO L470 AbstractCegarLoop]: Abstraction has 4650 states and 6449 transitions. [2021-11-19 13:23:10,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-19 13:23:10,924 INFO L276 IsEmpty]: Start isEmpty. Operand 4650 states and 6449 transitions. [2021-11-19 13:23:10,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-19 13:23:10,929 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:23:10,930 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:23:10,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 13:23:11,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:23:11,154 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)] === [2021-11-19 13:23:11,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:23:11,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1181643244, now seen corresponding path program 1 times [2021-11-19 13:23:11,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:23:11,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2007226160] [2021-11-19 13:23:11,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:11,159 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:23:11,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:23:11,161 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:23:11,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 13:23:12,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:13,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 1412 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:23:13,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:23:13,775 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 13:23:13,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:23:14,280 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 13:23:14,280 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:23:14,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2007226160] [2021-11-19 13:23:14,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2007226160] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:23:14,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:23:14,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-19 13:23:14,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648957388] [2021-11-19 13:23:14,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:23:14,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:23:14,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:23:14,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:23:14,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:23:14,283 INFO L87 Difference]: Start difference. First operand 4650 states and 6449 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 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) [2021-11-19 13:23:14,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:23:14,830 INFO L93 Difference]: Finished difference Result 4656 states and 6454 transitions. [2021-11-19 13:23:14,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:23:14,831 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 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 57 [2021-11-19 13:23:14,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:23:14,873 INFO L225 Difference]: With dead ends: 4656 [2021-11-19 13:23:14,874 INFO L226 Difference]: Without dead ends: 4654 [2021-11-19 13:23:14,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:23:14,880 INFO L933 BasicCegarLoop]: 2768 mSDtfsCounter, 2736 mSDsluCounter, 5517 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2746 SdHoareTripleChecker+Valid, 8285 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:23:14,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2746 Valid, 8285 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:23:14,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4654 states. [2021-11-19 13:23:15,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4654 to 4654. [2021-11-19 13:23:15,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4654 states, 2979 states have (on average 1.2286002014098691) internal successors, (3660), 3106 states have internal predecessors, (3660), 1393 states have call successors, (1393), 280 states have call predecessors, (1393), 279 states have return successors, (1399), 1342 states have call predecessors, (1399), 1390 states have call successors, (1399) [2021-11-19 13:23:15,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4654 states to 4654 states and 6452 transitions. [2021-11-19 13:23:15,241 INFO L78 Accepts]: Start accepts. Automaton has 4654 states and 6452 transitions. Word has length 57 [2021-11-19 13:23:15,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:23:15,242 INFO L470 AbstractCegarLoop]: Abstraction has 4654 states and 6452 transitions. [2021-11-19 13:23:15,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 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) [2021-11-19 13:23:15,242 INFO L276 IsEmpty]: Start isEmpty. Operand 4654 states and 6452 transitions. [2021-11-19 13:23:15,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-19 13:23:15,244 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:23:15,244 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-11-19 13:23:15,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 13:23:15,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:23:15,471 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)] === [2021-11-19 13:23:15,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:23:15,472 INFO L85 PathProgramCache]: Analyzing trace with hash -160876412, now seen corresponding path program 1 times [2021-11-19 13:23:15,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:23:15,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2001816310] [2021-11-19 13:23:15,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:15,475 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:23:15,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:23:15,478 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:23:15,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 13:23:17,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:17,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 1419 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:23:17,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:23:17,983 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 13:23:17,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:23:18,419 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 13:23:18,420 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:23:18,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2001816310] [2021-11-19 13:23:18,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2001816310] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:23:18,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:23:18,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-19 13:23:18,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732011316] [2021-11-19 13:23:18,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:23:18,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:23:18,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:23:18,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:23:18,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:23:18,421 INFO L87 Difference]: Start difference. First operand 4654 states and 6452 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-19 13:23:18,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:23:18,974 INFO L93 Difference]: Finished difference Result 4660 states and 6457 transitions. [2021-11-19 13:23:18,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:23:18,975 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 62 [2021-11-19 13:23:18,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:23:19,017 INFO L225 Difference]: With dead ends: 4660 [2021-11-19 13:23:19,018 INFO L226 Difference]: Without dead ends: 4658 [2021-11-19 13:23:19,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:23:19,025 INFO L933 BasicCegarLoop]: 2768 mSDtfsCounter, 2736 mSDsluCounter, 5517 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2745 SdHoareTripleChecker+Valid, 8285 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:23:19,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2745 Valid, 8285 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:23:19,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4658 states. [2021-11-19 13:23:19,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4658 to 4658. [2021-11-19 13:23:19,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4658 states, 2982 states have (on average 1.228370221327968) internal successors, (3663), 3109 states have internal predecessors, (3663), 1393 states have call successors, (1393), 281 states have call predecessors, (1393), 280 states have return successors, (1399), 1342 states have call predecessors, (1399), 1390 states have call successors, (1399) [2021-11-19 13:23:19,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4658 states to 4658 states and 6455 transitions. [2021-11-19 13:23:19,423 INFO L78 Accepts]: Start accepts. Automaton has 4658 states and 6455 transitions. Word has length 62 [2021-11-19 13:23:19,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:23:19,424 INFO L470 AbstractCegarLoop]: Abstraction has 4658 states and 6455 transitions. [2021-11-19 13:23:19,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-19 13:23:19,424 INFO L276 IsEmpty]: Start isEmpty. Operand 4658 states and 6455 transitions. [2021-11-19 13:23:19,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-19 13:23:19,426 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:23:19,426 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 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, 1, 1, 1, 1, 1, 1] [2021-11-19 13:23:19,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 13:23:19,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:23:19,639 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)] === [2021-11-19 13:23:19,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:23:19,640 INFO L85 PathProgramCache]: Analyzing trace with hash -16274476, now seen corresponding path program 1 times [2021-11-19 13:23:19,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:23:19,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1795604691] [2021-11-19 13:23:19,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:19,644 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:23:19,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:23:19,645 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:23:19,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 13:23:21,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:21,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 1426 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:23:21,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:23:22,065 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 13:23:22,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:23:22,536 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 13:23:22,536 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:23:22,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1795604691] [2021-11-19 13:23:22,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1795604691] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:23:22,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:23:22,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-19 13:23:22,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889051158] [2021-11-19 13:23:22,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:23:22,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:23:22,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:23:22,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:23:22,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:23:22,539 INFO L87 Difference]: Start difference. First operand 4658 states and 6455 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 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) [2021-11-19 13:23:23,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:23:23,052 INFO L93 Difference]: Finished difference Result 4664 states and 6460 transitions. [2021-11-19 13:23:23,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:23:23,053 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 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 67 [2021-11-19 13:23:23,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:23:23,106 INFO L225 Difference]: With dead ends: 4664 [2021-11-19 13:23:23,106 INFO L226 Difference]: Without dead ends: 4662 [2021-11-19 13:23:23,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:23:23,112 INFO L933 BasicCegarLoop]: 2768 mSDtfsCounter, 2736 mSDsluCounter, 5517 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2744 SdHoareTripleChecker+Valid, 8285 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:23:23,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2744 Valid, 8285 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:23:23,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4662 states. [2021-11-19 13:23:23,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4662 to 4662. [2021-11-19 13:23:23,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4662 states, 2985 states have (on average 1.228140703517588) internal successors, (3666), 3112 states have internal predecessors, (3666), 1393 states have call successors, (1393), 282 states have call predecessors, (1393), 281 states have return successors, (1399), 1342 states have call predecessors, (1399), 1390 states have call successors, (1399) [2021-11-19 13:23:23,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4662 states to 4662 states and 6458 transitions. [2021-11-19 13:23:23,585 INFO L78 Accepts]: Start accepts. Automaton has 4662 states and 6458 transitions. Word has length 67 [2021-11-19 13:23:23,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:23:23,586 INFO L470 AbstractCegarLoop]: Abstraction has 4662 states and 6458 transitions. [2021-11-19 13:23:23,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 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) [2021-11-19 13:23:23,587 INFO L276 IsEmpty]: Start isEmpty. Operand 4662 states and 6458 transitions. [2021-11-19 13:23:23,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-19 13:23:23,589 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:23:23,589 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:23:23,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 13:23:23,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:23:23,815 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)] === [2021-11-19 13:23:23,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:23:23,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1205869921, now seen corresponding path program 1 times [2021-11-19 13:23:23,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:23:23,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [149607123] [2021-11-19 13:23:23,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:23,819 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:23:23,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:23:23,821 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:23:23,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 13:23:25,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:25,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 1472 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-19 13:23:25,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:23:27,182 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-19 13:23:27,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:23:28,535 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 13:23:28,535 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:23:28,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [149607123] [2021-11-19 13:23:28,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [149607123] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:23:28,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1896048599] [2021-11-19 13:23:28,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:28,535 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:23:28,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:23:28,537 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:23:28,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-19 13:23:29,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:29,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 1472 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:23:29,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:23:30,922 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 13:23:30,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:23:31,638 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 13:23:31,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1896048599] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:23:31,639 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-19 13:23:31,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [16, 16, 4] total 24 [2021-11-19 13:23:31,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238436380] [2021-11-19 13:23:31,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:23:31,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:23:31,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:23:31,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:23:31,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=501, Unknown=0, NotChecked=0, Total=552 [2021-11-19 13:23:31,641 INFO L87 Difference]: Start difference. First operand 4662 states and 6458 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 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) [2021-11-19 13:23:32,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:23:32,426 INFO L93 Difference]: Finished difference Result 4668 states and 6463 transitions. [2021-11-19 13:23:32,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:23:32,427 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 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 86 [2021-11-19 13:23:32,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:23:32,493 INFO L225 Difference]: With dead ends: 4668 [2021-11-19 13:23:32,493 INFO L226 Difference]: Without dead ends: 4666 [2021-11-19 13:23:32,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=66, Invalid=636, Unknown=0, NotChecked=0, Total=702 [2021-11-19 13:23:32,499 INFO L933 BasicCegarLoop]: 2768 mSDtfsCounter, 2729 mSDsluCounter, 5517 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2736 SdHoareTripleChecker+Valid, 8285 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:23:32,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2736 Valid, 8285 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:23:32,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4666 states. [2021-11-19 13:23:32,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4666 to 4666. [2021-11-19 13:23:32,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4666 states, 2988 states have (on average 1.2279116465863453) internal successors, (3669), 3115 states have internal predecessors, (3669), 1393 states have call successors, (1393), 283 states have call predecessors, (1393), 282 states have return successors, (1399), 1342 states have call predecessors, (1399), 1390 states have call successors, (1399) [2021-11-19 13:23:32,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4666 states to 4666 states and 6461 transitions. [2021-11-19 13:23:32,954 INFO L78 Accepts]: Start accepts. Automaton has 4666 states and 6461 transitions. Word has length 86 [2021-11-19 13:23:32,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:23:32,955 INFO L470 AbstractCegarLoop]: Abstraction has 4666 states and 6461 transitions. [2021-11-19 13:23:32,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 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) [2021-11-19 13:23:32,956 INFO L276 IsEmpty]: Start isEmpty. Operand 4666 states and 6461 transitions. [2021-11-19 13:23:32,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-19 13:23:32,958 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:23:32,958 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:23:33,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 13:23:33,198 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2021-11-19 13:23:33,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:23:33,384 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)] === [2021-11-19 13:23:33,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:23:33,384 INFO L85 PathProgramCache]: Analyzing trace with hash 523585940, now seen corresponding path program 1 times [2021-11-19 13:23:33,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:23:33,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [904339029] [2021-11-19 13:23:33,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:33,388 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:23:33,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:23:33,389 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:23:33,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 13:23:34,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:35,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 1440 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:23:35,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:23:35,912 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-19 13:23:35,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:23:36,436 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-19 13:23:36,436 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:23:36,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [904339029] [2021-11-19 13:23:36,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [904339029] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:23:36,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:23:36,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-19 13:23:36,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322849936] [2021-11-19 13:23:36,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:23:36,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:23:36,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:23:36,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:23:36,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:23:36,438 INFO L87 Difference]: Start difference. First operand 4666 states and 6461 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 13:23:37,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:23:37,048 INFO L93 Difference]: Finished difference Result 4672 states and 6466 transitions. [2021-11-19 13:23:37,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:23:37,049 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 77 [2021-11-19 13:23:37,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:23:37,081 INFO L225 Difference]: With dead ends: 4672 [2021-11-19 13:23:37,081 INFO L226 Difference]: Without dead ends: 4670 [2021-11-19 13:23:37,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:23:37,087 INFO L933 BasicCegarLoop]: 2768 mSDtfsCounter, 2736 mSDsluCounter, 5517 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2742 SdHoareTripleChecker+Valid, 8285 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:23:37,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2742 Valid, 8285 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:23:37,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4670 states. [2021-11-19 13:23:37,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4670 to 4670. [2021-11-19 13:23:37,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4670 states, 2991 states have (on average 1.2276830491474424) internal successors, (3672), 3118 states have internal predecessors, (3672), 1393 states have call successors, (1393), 284 states have call predecessors, (1393), 283 states have return successors, (1399), 1342 states have call predecessors, (1399), 1390 states have call successors, (1399) [2021-11-19 13:23:37,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4670 states to 4670 states and 6464 transitions. [2021-11-19 13:23:37,583 INFO L78 Accepts]: Start accepts. Automaton has 4670 states and 6464 transitions. Word has length 77 [2021-11-19 13:23:37,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:23:37,585 INFO L470 AbstractCegarLoop]: Abstraction has 4670 states and 6464 transitions. [2021-11-19 13:23:37,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 13:23:37,586 INFO L276 IsEmpty]: Start isEmpty. Operand 4670 states and 6464 transitions. [2021-11-19 13:23:37,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-19 13:23:37,595 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:23:37,596 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:23:37,650 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-19 13:23:37,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:23:37,819 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)] === [2021-11-19 13:23:37,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:23:37,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1076086497, now seen corresponding path program 1 times [2021-11-19 13:23:37,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:23:37,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1758444861] [2021-11-19 13:23:37,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:37,822 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:23:37,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:23:37,823 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:23:37,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 13:23:39,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:39,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 1486 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-19 13:23:39,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:23:41,172 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-19 13:23:41,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:23:42,643 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-19 13:23:42,643 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:23:42,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1758444861] [2021-11-19 13:23:42,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1758444861] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:23:42,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1412889707] [2021-11-19 13:23:42,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:42,644 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:23:42,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:23:42,646 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:23:42,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-19 13:23:43,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:43,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 1486 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:23:43,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:23:45,336 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-19 13:23:45,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:23:46,213 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-19 13:23:46,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1412889707] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:23:46,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-19 13:23:46,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [16, 16, 4] total 24 [2021-11-19 13:23:46,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163314961] [2021-11-19 13:23:46,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:23:46,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:23:46,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:23:46,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:23:46,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=501, Unknown=0, NotChecked=0, Total=552 [2021-11-19 13:23:46,216 INFO L87 Difference]: Start difference. First operand 4670 states and 6464 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 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) [2021-11-19 13:23:47,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:23:47,389 INFO L93 Difference]: Finished difference Result 8737 states and 12553 transitions. [2021-11-19 13:23:47,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:23:47,389 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 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 96 [2021-11-19 13:23:47,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:23:47,512 INFO L225 Difference]: With dead ends: 8737 [2021-11-19 13:23:47,512 INFO L226 Difference]: Without dead ends: 8735 [2021-11-19 13:23:47,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=66, Invalid=636, Unknown=0, NotChecked=0, Total=702 [2021-11-19 13:23:47,517 INFO L933 BasicCegarLoop]: 3669 mSDtfsCounter, 2353 mSDsluCounter, 10101 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2358 SdHoareTripleChecker+Valid, 13770 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:23:47,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2358 Valid, 13770 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:23:47,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8735 states. [2021-11-19 13:23:48,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8735 to 8719. [2021-11-19 13:23:48,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8719 states, 5571 states have (on average 1.2256327409800754) internal successors, (6828), 5822 states have internal predecessors, (6828), 2598 states have call successors, (2598), 562 states have call predecessors, (2598), 547 states have return successors, (3112), 2461 states have call predecessors, (3112), 2592 states have call successors, (3112) [2021-11-19 13:23:48,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8719 states to 8719 states and 12538 transitions. [2021-11-19 13:23:48,510 INFO L78 Accepts]: Start accepts. Automaton has 8719 states and 12538 transitions. Word has length 96 [2021-11-19 13:23:48,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:23:48,511 INFO L470 AbstractCegarLoop]: Abstraction has 8719 states and 12538 transitions. [2021-11-19 13:23:48,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 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) [2021-11-19 13:23:48,512 INFO L276 IsEmpty]: Start isEmpty. Operand 8719 states and 12538 transitions. [2021-11-19 13:23:48,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-19 13:23:48,514 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:23:48,514 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:23:48,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 13:23:48,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-19 13:23:48,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:23:48,931 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)] === [2021-11-19 13:23:48,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:23:48,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1162188972, now seen corresponding path program 1 times [2021-11-19 13:23:48,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:23:48,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [669709577] [2021-11-19 13:23:48,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:48,935 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:23:48,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:23:48,936 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:23:48,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 13:23:50,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:50,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 1454 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:23:50,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:23:51,936 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-19 13:23:51,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:23:52,495 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-19 13:23:52,496 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:23:52,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [669709577] [2021-11-19 13:23:52,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [669709577] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:23:52,497 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:23:52,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-19 13:23:52,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204938920] [2021-11-19 13:23:52,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:23:52,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:23:52,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:23:52,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:23:52,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:23:52,499 INFO L87 Difference]: Start difference. First operand 8719 states and 12538 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 13:23:53,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:23:53,617 INFO L93 Difference]: Finished difference Result 8729 states and 12547 transitions. [2021-11-19 13:23:53,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:23:53,618 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 87 [2021-11-19 13:23:53,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:23:53,674 INFO L225 Difference]: With dead ends: 8729 [2021-11-19 13:23:53,674 INFO L226 Difference]: Without dead ends: 8727 [2021-11-19 13:23:53,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:23:53,686 INFO L933 BasicCegarLoop]: 2768 mSDtfsCounter, 2736 mSDsluCounter, 5517 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2740 SdHoareTripleChecker+Valid, 8285 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:23:53,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2740 Valid, 8285 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:23:53,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8727 states. [2021-11-19 13:23:54,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8727 to 8727. [2021-11-19 13:23:54,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8727 states, 5577 states have (on average 1.2253899946207638) internal successors, (6834), 5828 states have internal predecessors, (6834), 2598 states have call successors, (2598), 564 states have call predecessors, (2598), 549 states have return successors, (3112), 2461 states have call predecessors, (3112), 2592 states have call successors, (3112) [2021-11-19 13:23:54,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8727 states to 8727 states and 12544 transitions. [2021-11-19 13:23:54,859 INFO L78 Accepts]: Start accepts. Automaton has 8727 states and 12544 transitions. Word has length 87 [2021-11-19 13:23:54,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:23:54,860 INFO L470 AbstractCegarLoop]: Abstraction has 8727 states and 12544 transitions. [2021-11-19 13:23:54,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 13:23:54,861 INFO L276 IsEmpty]: Start isEmpty. Operand 8727 states and 12544 transitions. [2021-11-19 13:23:54,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-19 13:23:54,863 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:23:54,864 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:23:54,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 13:23:55,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:23:55,079 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)] === [2021-11-19 13:23:55,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:23:55,080 INFO L85 PathProgramCache]: Analyzing trace with hash 667203012, now seen corresponding path program 1 times [2021-11-19 13:23:55,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:23:55,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1942312605] [2021-11-19 13:23:55,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:55,082 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:23:55,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:23:55,084 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:23:55,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 13:23:56,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:56,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 1461 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:23:56,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:23:57,704 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-11-19 13:23:57,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:23:58,191 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-11-19 13:23:58,191 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:23:58,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1942312605] [2021-11-19 13:23:58,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1942312605] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:23:58,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:23:58,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-19 13:23:58,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769590861] [2021-11-19 13:23:58,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:23:58,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:23:58,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:23:58,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:23:58,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:23:58,193 INFO L87 Difference]: Start difference. First operand 8727 states and 12544 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 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) [2021-11-19 13:23:59,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:23:59,028 INFO L93 Difference]: Finished difference Result 8737 states and 12553 transitions. [2021-11-19 13:23:59,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:23:59,028 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 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 92 [2021-11-19 13:23:59,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:23:59,078 INFO L225 Difference]: With dead ends: 8737 [2021-11-19 13:23:59,078 INFO L226 Difference]: Without dead ends: 8735 [2021-11-19 13:23:59,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:23:59,085 INFO L933 BasicCegarLoop]: 2768 mSDtfsCounter, 2736 mSDsluCounter, 5517 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2739 SdHoareTripleChecker+Valid, 8285 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:23:59,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2739 Valid, 8285 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:23:59,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8735 states. [2021-11-19 13:24:00,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8735 to 8735. [2021-11-19 13:24:00,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8735 states, 5583 states have (on average 1.2251477700161204) internal successors, (6840), 5834 states have internal predecessors, (6840), 2598 states have call successors, (2598), 566 states have call predecessors, (2598), 551 states have return successors, (3112), 2461 states have call predecessors, (3112), 2592 states have call successors, (3112) [2021-11-19 13:24:00,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8735 states to 8735 states and 12550 transitions. [2021-11-19 13:24:00,389 INFO L78 Accepts]: Start accepts. Automaton has 8735 states and 12550 transitions. Word has length 92 [2021-11-19 13:24:00,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:24:00,390 INFO L470 AbstractCegarLoop]: Abstraction has 8735 states and 12550 transitions. [2021-11-19 13:24:00,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 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) [2021-11-19 13:24:00,390 INFO L276 IsEmpty]: Start isEmpty. Operand 8735 states and 12550 transitions. [2021-11-19 13:24:00,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-19 13:24:00,394 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:24:00,395 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:24:00,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 13:24:00,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:24:00,619 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)] === [2021-11-19 13:24:00,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:24:00,620 INFO L85 PathProgramCache]: Analyzing trace with hash -403204969, now seen corresponding path program 1 times [2021-11-19 13:24:00,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:24:00,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [591582874] [2021-11-19 13:24:00,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:24:00,622 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:24:00,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:24:00,624 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:24:00,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 13:24:02,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:24:02,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 1507 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-19 13:24:02,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:24:03,719 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-11-19 13:24:03,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:24:04,907 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-19 13:24:04,908 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:24:04,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [591582874] [2021-11-19 13:24:04,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [591582874] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:24:04,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [714296000] [2021-11-19 13:24:04,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:24:04,909 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:24:04,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:24:04,912 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:24:04,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-19 13:24:06,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:24:06,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 1507 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:24:06,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:24:07,626 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-19 13:24:07,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:24:08,464 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-19 13:24:08,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [714296000] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:24:08,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-19 13:24:08,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [16, 16, 4] total 24 [2021-11-19 13:24:08,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070981453] [2021-11-19 13:24:08,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:24:08,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:24:08,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:24:08,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:24:08,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=501, Unknown=0, NotChecked=0, Total=552 [2021-11-19 13:24:08,466 INFO L87 Difference]: Start difference. First operand 8735 states and 12550 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 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) [2021-11-19 13:24:09,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:24:09,570 INFO L93 Difference]: Finished difference Result 8745 states and 12559 transitions. [2021-11-19 13:24:09,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:24:09,571 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 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 111 [2021-11-19 13:24:09,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:24:09,625 INFO L225 Difference]: With dead ends: 8745 [2021-11-19 13:24:09,625 INFO L226 Difference]: Without dead ends: 8743 [2021-11-19 13:24:09,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 418 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=66, Invalid=636, Unknown=0, NotChecked=0, Total=702 [2021-11-19 13:24:09,634 INFO L933 BasicCegarLoop]: 2768 mSDtfsCounter, 2729 mSDsluCounter, 5517 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2731 SdHoareTripleChecker+Valid, 8285 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:24:09,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2731 Valid, 8285 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:24:09,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8743 states. [2021-11-19 13:24:10,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8743 to 8743. [2021-11-19 13:24:10,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8743 states, 5589 states have (on average 1.2249060654857757) internal successors, (6846), 5840 states have internal predecessors, (6846), 2598 states have call successors, (2598), 568 states have call predecessors, (2598), 553 states have return successors, (3112), 2461 states have call predecessors, (3112), 2592 states have call successors, (3112) [2021-11-19 13:24:10,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8743 states to 8743 states and 12556 transitions. [2021-11-19 13:24:10,773 INFO L78 Accepts]: Start accepts. Automaton has 8743 states and 12556 transitions. Word has length 111 [2021-11-19 13:24:10,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:24:10,774 INFO L470 AbstractCegarLoop]: Abstraction has 8743 states and 12556 transitions. [2021-11-19 13:24:10,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 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) [2021-11-19 13:24:10,775 INFO L276 IsEmpty]: Start isEmpty. Operand 8743 states and 12556 transitions. [2021-11-19 13:24:10,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-19 13:24:10,777 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:24:10,777 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:24:10,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-19 13:24:11,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 13:24:11,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:24:11,192 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 13:24:11,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:24:11,192 INFO L85 PathProgramCache]: Analyzing trace with hash 914284420, now seen corresponding path program 1 times [2021-11-19 13:24:11,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:24:11,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [744482098] [2021-11-19 13:24:11,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:24:11,195 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:24:11,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:24:11,197 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:24:11,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 13:24:13,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:24:13,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 1475 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:24:13,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:24:14,240 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-19 13:24:14,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:24:14,814 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-19 13:24:14,814 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:24:14,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [744482098] [2021-11-19 13:24:14,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [744482098] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:24:14,815 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:24:14,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-19 13:24:14,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203808625] [2021-11-19 13:24:14,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:24:14,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:24:14,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:24:14,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:24:14,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:24:14,817 INFO L87 Difference]: Start difference. First operand 8743 states and 12556 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 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) [2021-11-19 13:24:15,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:24:15,965 INFO L93 Difference]: Finished difference Result 8753 states and 12565 transitions. [2021-11-19 13:24:15,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:24:15,966 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 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 102 [2021-11-19 13:24:15,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:24:16,012 INFO L225 Difference]: With dead ends: 8753 [2021-11-19 13:24:16,012 INFO L226 Difference]: Without dead ends: 8749 [2021-11-19 13:24:16,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:24:16,018 INFO L933 BasicCegarLoop]: 2768 mSDtfsCounter, 2736 mSDsluCounter, 5517 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2737 SdHoareTripleChecker+Valid, 8285 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:24:16,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2737 Valid, 8285 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:24:16,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8749 states. [2021-11-19 13:24:17,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8749 to 8749. [2021-11-19 13:24:17,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8749 states, 5594 states have (on average 1.2245262781551662) internal successors, (6850), 5844 states have internal predecessors, (6850), 2598 states have call successors, (2598), 570 states have call predecessors, (2598), 554 states have return successors, (3112), 2461 states have call predecessors, (3112), 2592 states have call successors, (3112) [2021-11-19 13:24:17,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8749 states to 8749 states and 12560 transitions. [2021-11-19 13:24:17,112 INFO L78 Accepts]: Start accepts. Automaton has 8749 states and 12560 transitions. Word has length 102 [2021-11-19 13:24:17,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:24:17,113 INFO L470 AbstractCegarLoop]: Abstraction has 8749 states and 12560 transitions. [2021-11-19 13:24:17,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 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) [2021-11-19 13:24:17,113 INFO L276 IsEmpty]: Start isEmpty. Operand 8749 states and 12560 transitions. [2021-11-19 13:24:17,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-19 13:24:17,116 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:24:17,116 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:24:17,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 13:24:17,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:24:17,329 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)] === [2021-11-19 13:24:17,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:24:17,330 INFO L85 PathProgramCache]: Analyzing trace with hash 2118853332, now seen corresponding path program 1 times [2021-11-19 13:24:17,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:24:17,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1705590102] [2021-11-19 13:24:17,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:24:17,332 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:24:17,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:24:17,334 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:24:17,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 13:24:18,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:24:18,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 1482 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:24:18,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:24:19,881 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-11-19 13:24:19,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:24:20,416 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-11-19 13:24:20,416 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:24:20,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1705590102] [2021-11-19 13:24:20,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1705590102] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:24:20,416 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:24:20,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-19 13:24:20,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903456854] [2021-11-19 13:24:20,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:24:20,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:24:20,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:24:20,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:24:20,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:24:20,419 INFO L87 Difference]: Start difference. First operand 8749 states and 12560 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 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) [2021-11-19 13:24:21,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:24:21,263 INFO L93 Difference]: Finished difference Result 8755 states and 12565 transitions. [2021-11-19 13:24:21,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:24:21,264 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 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 107 [2021-11-19 13:24:21,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:24:21,315 INFO L225 Difference]: With dead ends: 8755 [2021-11-19 13:24:21,315 INFO L226 Difference]: Without dead ends: 8660 [2021-11-19 13:24:21,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:24:21,323 INFO L933 BasicCegarLoop]: 2769 mSDtfsCounter, 2736 mSDsluCounter, 5519 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2736 SdHoareTripleChecker+Valid, 8288 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:24:21,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2736 Valid, 8288 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:24:21,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8660 states. [2021-11-19 13:24:22,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8660 to 8660. [2021-11-19 13:24:22,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8660 states, 5543 states have (on average 1.2247880209272957) internal successors, (6789), 5789 states have internal predecessors, (6789), 2576 states have call successors, (2576), 553 states have call predecessors, (2576), 538 states have return successors, (3093), 2444 states have call predecessors, (3093), 2573 states have call successors, (3093) [2021-11-19 13:24:22,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8660 states to 8660 states and 12458 transitions. [2021-11-19 13:24:22,570 INFO L78 Accepts]: Start accepts. Automaton has 8660 states and 12458 transitions. Word has length 107 [2021-11-19 13:24:22,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:24:22,571 INFO L470 AbstractCegarLoop]: Abstraction has 8660 states and 12458 transitions. [2021-11-19 13:24:22,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 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) [2021-11-19 13:24:22,571 INFO L276 IsEmpty]: Start isEmpty. Operand 8660 states and 12458 transitions. [2021-11-19 13:24:22,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-19 13:24:22,576 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:24:22,576 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:24:22,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 13:24:22,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:24:22,803 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 13:24:22,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:24:22,804 INFO L85 PathProgramCache]: Analyzing trace with hash 360188657, now seen corresponding path program 1 times [2021-11-19 13:24:22,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:24:22,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [343869791] [2021-11-19 13:24:22,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:24:22,807 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:24:22,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:24:22,809 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:24:22,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 13:24:24,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:24:24,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 1765 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 13:24:24,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:24:25,833 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 106 proven. 3 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 13:24:25,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:24:26,951 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-19 13:24:26,951 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:24:26,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [343869791] [2021-11-19 13:24:26,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [343869791] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:24:26,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1605408112] [2021-11-19 13:24:26,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:24:26,952 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:24:26,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:24:26,953 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:24:26,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-19 13:24:30,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:24:30,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 1765 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 13:24:30,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:24:31,539 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-19 13:24:31,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:24:32,353 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2021-11-19 13:24:32,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1605408112] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:24:32,353 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-19 13:24:32,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 8, 6] total 13 [2021-11-19 13:24:32,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080501356] [2021-11-19 13:24:32,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:24:32,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:24:32,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:24:32,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:24:32,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:24:32,356 INFO L87 Difference]: Start difference. First operand 8660 states and 12458 transitions. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-19 13:24:33,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:24:33,342 INFO L93 Difference]: Finished difference Result 17368 states and 24986 transitions. [2021-11-19 13:24:33,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:24:33,344 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) Word has length 150 [2021-11-19 13:24:33,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:24:33,401 INFO L225 Difference]: With dead ends: 17368 [2021-11-19 13:24:33,401 INFO L226 Difference]: Without dead ends: 8725 [2021-11-19 13:24:33,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 585 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-11-19 13:24:33,510 INFO L933 BasicCegarLoop]: 2813 mSDtfsCounter, 112 mSDsluCounter, 11099 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 13912 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:24:33,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 13912 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:24:33,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8725 states. [2021-11-19 13:24:34,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8725 to 8660. [2021-11-19 13:24:34,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8660 states, 5543 states have (on average 1.2246076132058452) internal successors, (6788), 5788 states have internal predecessors, (6788), 2576 states have call successors, (2576), 553 states have call predecessors, (2576), 538 states have return successors, (3093), 2444 states have call predecessors, (3093), 2573 states have call successors, (3093) [2021-11-19 13:24:34,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8660 states to 8660 states and 12457 transitions. [2021-11-19 13:24:34,578 INFO L78 Accepts]: Start accepts. Automaton has 8660 states and 12457 transitions. Word has length 150 [2021-11-19 13:24:34,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:24:34,579 INFO L470 AbstractCegarLoop]: Abstraction has 8660 states and 12457 transitions. [2021-11-19 13:24:34,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-19 13:24:34,580 INFO L276 IsEmpty]: Start isEmpty. Operand 8660 states and 12457 transitions. [2021-11-19 13:24:34,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-19 13:24:34,583 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:24:34,583 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:24:34,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-19 13:24:34,823 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-11-19 13:24:35,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:24:35,007 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 13:24:35,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:24:35,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1123620686, now seen corresponding path program 1 times [2021-11-19 13:24:35,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:24:35,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1328849570] [2021-11-19 13:24:35,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:24:35,010 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:24:35,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:24:35,011 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:24:35,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 13:24:36,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:24:36,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 1776 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-19 13:24:36,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:24:38,026 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-19 13:24:38,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:24:39,300 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-11-19 13:24:39,300 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:24:39,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1328849570] [2021-11-19 13:24:39,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1328849570] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:24:39,301 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:24:39,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14, 14] imperfect sequences [] total 17 [2021-11-19 13:24:39,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130783221] [2021-11-19 13:24:39,301 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:24:39,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-19 13:24:39,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:24:39,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-19 13:24:39,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-11-19 13:24:39,303 INFO L87 Difference]: Start difference. First operand 8660 states and 12457 transitions. Second operand has 17 states, 16 states have (on average 4.5625) internal successors, (73), 15 states have internal predecessors, (73), 6 states have call successors, (25), 2 states have call predecessors, (25), 6 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2021-11-19 13:24:44,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:24:44,325 INFO L93 Difference]: Finished difference Result 18027 states and 25961 transitions. [2021-11-19 13:24:44,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 13:24:44,326 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 4.5625) internal successors, (73), 15 states have internal predecessors, (73), 6 states have call successors, (25), 2 states have call predecessors, (25), 6 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) Word has length 154 [2021-11-19 13:24:44,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:24:44,378 INFO L225 Difference]: With dead ends: 18027 [2021-11-19 13:24:44,378 INFO L226 Difference]: Without dead ends: 9384 [2021-11-19 13:24:44,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2021-11-19 13:24:44,447 INFO L933 BasicCegarLoop]: 2878 mSDtfsCounter, 284 mSDsluCounter, 39758 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 42636 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:24:44,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 42636 Invalid, 909 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [127 Valid, 782 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-19 13:24:44,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9384 states. [2021-11-19 13:24:45,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9384 to 8704. [2021-11-19 13:24:45,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8704 states, 5575 states have (on average 1.223318385650224) internal successors, (6820), 5820 states have internal predecessors, (6820), 2584 states have call successors, (2584), 553 states have call predecessors, (2584), 542 states have return successors, (3105), 2456 states have call predecessors, (3105), 2581 states have call successors, (3105) [2021-11-19 13:24:45,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8704 states to 8704 states and 12509 transitions. [2021-11-19 13:24:45,385 INFO L78 Accepts]: Start accepts. Automaton has 8704 states and 12509 transitions. Word has length 154 [2021-11-19 13:24:45,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:24:45,386 INFO L470 AbstractCegarLoop]: Abstraction has 8704 states and 12509 transitions. [2021-11-19 13:24:45,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.5625) internal successors, (73), 15 states have internal predecessors, (73), 6 states have call successors, (25), 2 states have call predecessors, (25), 6 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2021-11-19 13:24:45,386 INFO L276 IsEmpty]: Start isEmpty. Operand 8704 states and 12509 transitions. [2021-11-19 13:24:45,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-19 13:24:45,390 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:24:45,390 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:24:45,439 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-19 13:24:45,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:24:45,615 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)] === [2021-11-19 13:24:45,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:24:45,616 INFO L85 PathProgramCache]: Analyzing trace with hash 2006974356, now seen corresponding path program 1 times [2021-11-19 13:24:45,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:24:45,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2084371389] [2021-11-19 13:24:45,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:24:45,618 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:24:45,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:24:45,619 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:24:45,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 13:24:47,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:24:47,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 1787 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:24:47,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:24:48,039 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-11-19 13:24:48,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:24:48,590 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-19 13:24:48,590 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:24:48,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2084371389] [2021-11-19 13:24:48,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2084371389] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:24:48,590 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:24:48,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 13:24:48,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982607386] [2021-11-19 13:24:48,591 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:24:48,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:24:48,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:24:48,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:24:48,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:24:48,592 INFO L87 Difference]: Start difference. First operand 8704 states and 12509 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-19 13:24:50,928 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:24:51,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:24:51,889 INFO L93 Difference]: Finished difference Result 17487 states and 25161 transitions. [2021-11-19 13:24:51,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:24:51,890 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 158 [2021-11-19 13:24:51,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:24:51,929 INFO L225 Difference]: With dead ends: 17487 [2021-11-19 13:24:51,929 INFO L226 Difference]: Without dead ends: 8804 [2021-11-19 13:24:51,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:24:51,977 INFO L933 BasicCegarLoop]: 2760 mSDtfsCounter, 33 mSDsluCounter, 2723 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 5483 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:24:51,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 5483 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 17 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-19 13:24:51,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8804 states. [2021-11-19 13:24:52,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8804 to 8788. [2021-11-19 13:24:52,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8788 states, 5635 states have (on average 1.222360248447205) internal successors, (6888), 5880 states have internal predecessors, (6888), 2608 states have call successors, (2608), 553 states have call predecessors, (2608), 542 states have return successors, (3129), 2480 states have call predecessors, (3129), 2605 states have call successors, (3129) [2021-11-19 13:24:52,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8788 states to 8788 states and 12625 transitions. [2021-11-19 13:24:52,744 INFO L78 Accepts]: Start accepts. Automaton has 8788 states and 12625 transitions. Word has length 158 [2021-11-19 13:24:52,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:24:52,745 INFO L470 AbstractCegarLoop]: Abstraction has 8788 states and 12625 transitions. [2021-11-19 13:24:52,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-19 13:24:52,745 INFO L276 IsEmpty]: Start isEmpty. Operand 8788 states and 12625 transitions. [2021-11-19 13:24:52,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-19 13:24:52,748 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:24:52,748 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:24:52,789 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-11-19 13:24:52,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:24:52,963 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)] === [2021-11-19 13:24:52,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:24:52,964 INFO L85 PathProgramCache]: Analyzing trace with hash -220279145, now seen corresponding path program 1 times [2021-11-19 13:24:52,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:24:52,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1577246461] [2021-11-19 13:24:52,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:24:52,965 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:24:52,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:24:52,966 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:24:52,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 13:24:54,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:24:54,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 1795 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-19 13:24:54,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:24:56,129 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-19 13:24:56,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:24:57,510 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-11-19 13:24:57,510 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:24:57,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1577246461] [2021-11-19 13:24:57,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1577246461] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:24:57,511 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:24:57,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15, 15] imperfect sequences [] total 18 [2021-11-19 13:24:57,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799110193] [2021-11-19 13:24:57,512 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:24:57,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 13:24:57,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:24:57,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 13:24:57,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-11-19 13:24:57,513 INFO L87 Difference]: Start difference. First operand 8788 states and 12625 transitions. Second operand has 18 states, 17 states have (on average 4.647058823529412) internal successors, (79), 16 states have internal predecessors, (79), 7 states have call successors, (26), 2 states have call predecessors, (26), 6 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2021-11-19 13:25:01,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:25:01,997 INFO L93 Difference]: Finished difference Result 18490 states and 26635 transitions. [2021-11-19 13:25:01,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-19 13:25:01,998 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.647058823529412) internal successors, (79), 16 states have internal predecessors, (79), 7 states have call successors, (26), 2 states have call predecessors, (26), 6 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) Word has length 162 [2021-11-19 13:25:01,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:25:02,048 INFO L225 Difference]: With dead ends: 18490 [2021-11-19 13:25:02,048 INFO L226 Difference]: Without dead ends: 9719 [2021-11-19 13:25:02,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2021-11-19 13:25:02,092 INFO L933 BasicCegarLoop]: 2958 mSDtfsCounter, 421 mSDsluCounter, 37897 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 40855 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-19 13:25:02,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [493 Valid, 40855 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-11-19 13:25:02,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9719 states. [2021-11-19 13:25:03,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9719 to 8796. [2021-11-19 13:25:03,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8796 states, 5639 states have (on average 1.2222025181769818) internal successors, (6892), 5888 states have internal predecessors, (6892), 2608 states have call successors, (2608), 553 states have call predecessors, (2608), 546 states have return successors, (3145), 2480 states have call predecessors, (3145), 2605 states have call successors, (3145) [2021-11-19 13:25:03,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8796 states to 8796 states and 12645 transitions. [2021-11-19 13:25:03,159 INFO L78 Accepts]: Start accepts. Automaton has 8796 states and 12645 transitions. Word has length 162 [2021-11-19 13:25:03,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:25:03,159 INFO L470 AbstractCegarLoop]: Abstraction has 8796 states and 12645 transitions. [2021-11-19 13:25:03,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.647058823529412) internal successors, (79), 16 states have internal predecessors, (79), 7 states have call successors, (26), 2 states have call predecessors, (26), 6 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2021-11-19 13:25:03,159 INFO L276 IsEmpty]: Start isEmpty. Operand 8796 states and 12645 transitions. [2021-11-19 13:25:03,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-11-19 13:25:03,161 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:25:03,162 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:25:03,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 13:25:03,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:25:03,363 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 13:25:03,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:25:03,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1246889559, now seen corresponding path program 1 times [2021-11-19 13:25:03,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:25:03,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1291309910] [2021-11-19 13:25:03,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:25:03,365 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:25:03,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:25:03,366 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:25:03,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 13:25:05,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:25:05,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 1960 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-19 13:25:05,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:25:08,664 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 39 proven. 21 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-19 13:25:08,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:25:12,560 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-19 13:25:12,561 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:25:12,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1291309910] [2021-11-19 13:25:12,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1291309910] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:25:12,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [201703487] [2021-11-19 13:25:12,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:25:12,561 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:25:12,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:25:12,562 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:25:12,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-19 13:25:13,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:25:14,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 1960 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 13:25:14,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:25:15,224 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-19 13:25:15,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:25:16,516 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-19 13:25:16,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [201703487] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:25:16,517 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:25:16,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [16, 13] total 32 [2021-11-19 13:25:16,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126750712] [2021-11-19 13:25:16,518 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:25:16,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:25:16,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:25:16,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:25:16,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=899, Unknown=0, NotChecked=0, Total=992 [2021-11-19 13:25:16,520 INFO L87 Difference]: Start difference. First operand 8796 states and 12645 transitions. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-19 13:25:19,109 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:25:21,117 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:25:22,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:25:22,551 INFO L93 Difference]: Finished difference Result 17667 states and 25429 transitions. [2021-11-19 13:25:22,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:25:22,552 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 181 [2021-11-19 13:25:22,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:25:22,582 INFO L225 Difference]: With dead ends: 17667 [2021-11-19 13:25:22,582 INFO L226 Difference]: Without dead ends: 8892 [2021-11-19 13:25:22,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 722 GetRequests, 690 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2021-11-19 13:25:22,620 INFO L933 BasicCegarLoop]: 2763 mSDtfsCounter, 39 mSDsluCounter, 13765 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 9 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 16528 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-11-19 13:25:22,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 16528 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 49 Invalid, 2 Unknown, 0 Unchecked, 4.9s Time] [2021-11-19 13:25:22,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8892 states. [2021-11-19 13:25:23,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8892 to 8848. [2021-11-19 13:25:23,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8848 states, 5683 states have (on average 1.2218898469118424) internal successors, (6944), 5936 states have internal predecessors, (6944), 2616 states have call successors, (2616), 553 states have call predecessors, (2616), 546 states have return successors, (3153), 2488 states have call predecessors, (3153), 2613 states have call successors, (3153) [2021-11-19 13:25:23,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8848 states to 8848 states and 12713 transitions. [2021-11-19 13:25:23,405 INFO L78 Accepts]: Start accepts. Automaton has 8848 states and 12713 transitions. Word has length 181 [2021-11-19 13:25:23,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:25:23,406 INFO L470 AbstractCegarLoop]: Abstraction has 8848 states and 12713 transitions. [2021-11-19 13:25:23,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-19 13:25:23,407 INFO L276 IsEmpty]: Start isEmpty. Operand 8848 states and 12713 transitions. [2021-11-19 13:25:23,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-11-19 13:25:23,409 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:25:23,410 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:25:23,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-19 13:25:23,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-19 13:25:23,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:25:23,811 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 13:25:23,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:25:23,811 INFO L85 PathProgramCache]: Analyzing trace with hash -882474446, now seen corresponding path program 1 times [2021-11-19 13:25:23,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:25:23,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [242936923] [2021-11-19 13:25:23,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:25:23,814 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:25:23,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:25:23,814 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:25:23,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-19 13:25:26,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:25:26,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 2007 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-19 13:25:26,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:25:29,072 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 33 proven. 42 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-19 13:25:29,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:25:32,847 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 24 proven. 36 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-11-19 13:25:32,847 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:25:32,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [242936923] [2021-11-19 13:25:32,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [242936923] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:25:32,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1910265978] [2021-11-19 13:25:32,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:25:32,848 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:25:32,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:25:32,855 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:25:32,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-19 13:25:36,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:25:36,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 2007 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-19 13:25:36,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:25:38,847 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-11-19 13:25:38,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:25:39,862 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-11-19 13:25:39,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1910265978] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:25:39,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947052076] [2021-11-19 13:25:39,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:25:39,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:25:39,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:25:39,864 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:25:39,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-19 13:25:41,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:25:41,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 2007 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:25:41,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:25:42,134 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-19 13:25:42,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:25:43,046 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2021-11-19 13:25:43,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947052076] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:25:43,047 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-19 13:25:43,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [16, 13, 9, 9] total 36 [2021-11-19 13:25:43,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977109644] [2021-11-19 13:25:43,047 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:25:43,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:25:43,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:25:43,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:25:43,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1148, Unknown=0, NotChecked=0, Total=1260 [2021-11-19 13:25:43,049 INFO L87 Difference]: Start difference. First operand 8848 states and 12713 transitions. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 4 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-19 13:25:44,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:25:44,132 INFO L93 Difference]: Finished difference Result 17703 states and 25469 transitions. [2021-11-19 13:25:44,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:25:44,133 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 4 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 202 [2021-11-19 13:25:44,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:25:44,169 INFO L225 Difference]: With dead ends: 17703 [2021-11-19 13:25:44,169 INFO L226 Difference]: Without dead ends: 8876 [2021-11-19 13:25:44,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1208 GetRequests, 1171 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=124, Invalid=1282, Unknown=0, NotChecked=0, Total=1406 [2021-11-19 13:25:44,211 INFO L933 BasicCegarLoop]: 2770 mSDtfsCounter, 468 mSDsluCounter, 5216 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 7986 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:25:44,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [547 Valid, 7986 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:25:44,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8876 states. [2021-11-19 13:25:45,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8876 to 8848. [2021-11-19 13:25:45,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8848 states, 5683 states have (on average 1.2218898469118424) internal successors, (6944), 5936 states have internal predecessors, (6944), 2616 states have call successors, (2616), 553 states have call predecessors, (2616), 546 states have return successors, (3153), 2488 states have call predecessors, (3153), 2613 states have call successors, (3153) [2021-11-19 13:25:45,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8848 states to 8848 states and 12713 transitions. [2021-11-19 13:25:45,156 INFO L78 Accepts]: Start accepts. Automaton has 8848 states and 12713 transitions. Word has length 202 [2021-11-19 13:25:45,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:25:45,157 INFO L470 AbstractCegarLoop]: Abstraction has 8848 states and 12713 transitions. [2021-11-19 13:25:45,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 4 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-19 13:25:45,158 INFO L276 IsEmpty]: Start isEmpty. Operand 8848 states and 12713 transitions. [2021-11-19 13:25:45,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-11-19 13:25:45,161 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:25:45,161 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:25:45,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-19 13:25:45,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-19 13:25:45,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-19 13:25:45,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:25:45,767 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 13:25:45,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:25:45,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1133296110, now seen corresponding path program 1 times [2021-11-19 13:25:45,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:25:45,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [289874230] [2021-11-19 13:25:45,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:25:45,770 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:25:45,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:25:45,772 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:25:45,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-19 13:25:48,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:25:48,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 2017 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-19 13:25:48,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:25:50,954 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 33 proven. 42 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-11-19 13:25:50,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:25:54,799 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 24 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-11-19 13:25:54,799 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:25:54,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [289874230] [2021-11-19 13:25:54,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [289874230] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:25:54,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1389627028] [2021-11-19 13:25:54,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:25:54,800 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:25:54,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:25:54,801 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:25:54,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-19 13:25:58,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:25:58,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 2017 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-19 13:25:58,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:26:00,180 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2021-11-19 13:26:00,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:26:01,272 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2021-11-19 13:26:01,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1389627028] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:26:01,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388855556] [2021-11-19 13:26:01,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:26:01,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:26:01,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:26:01,274 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:26:01,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-19 13:26:03,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:26:03,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 2017 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 13:26:03,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:26:05,279 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2021-11-19 13:26:05,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:26:06,504 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2021-11-19 13:26:06,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388855556] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:26:06,504 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-19 13:26:06,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [16, 13, 9, 9] total 37 [2021-11-19 13:26:06,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44179918] [2021-11-19 13:26:06,505 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:26:06,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:26:06,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:26:06,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:26:06,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1218, Unknown=0, NotChecked=0, Total=1332 [2021-11-19 13:26:06,507 INFO L87 Difference]: Start difference. First operand 8848 states and 12713 transitions. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 5 states have internal predecessors, (120), 2 states have call successors, (44), 4 states have call predecessors, (44), 2 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) [2021-11-19 13:26:07,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:26:07,575 INFO L93 Difference]: Finished difference Result 8858 states and 12721 transitions. [2021-11-19 13:26:07,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:26:07,575 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 5 states have internal predecessors, (120), 2 states have call successors, (44), 4 states have call predecessors, (44), 2 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) Word has length 204 [2021-11-19 13:26:07,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:26:07,598 INFO L225 Difference]: With dead ends: 8858 [2021-11-19 13:26:07,598 INFO L226 Difference]: Without dead ends: 8856 [2021-11-19 13:26:07,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1220 GetRequests, 1182 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=127, Invalid=1355, Unknown=0, NotChecked=0, Total=1482 [2021-11-19 13:26:07,603 INFO L933 BasicCegarLoop]: 3797 mSDtfsCounter, 2226 mSDsluCounter, 17957 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2227 SdHoareTripleChecker+Valid, 21754 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:26:07,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2227 Valid, 21754 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:26:07,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8856 states. [2021-11-19 13:26:08,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8856 to 8848. [2021-11-19 13:26:08,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8848 states, 5683 states have (on average 1.2213619567130036) internal successors, (6941), 5936 states have internal predecessors, (6941), 2616 states have call successors, (2616), 553 states have call predecessors, (2616), 546 states have return successors, (3153), 2488 states have call predecessors, (3153), 2613 states have call successors, (3153) [2021-11-19 13:26:08,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8848 states to 8848 states and 12710 transitions. [2021-11-19 13:26:08,468 INFO L78 Accepts]: Start accepts. Automaton has 8848 states and 12710 transitions. Word has length 204 [2021-11-19 13:26:08,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:26:08,468 INFO L470 AbstractCegarLoop]: Abstraction has 8848 states and 12710 transitions. [2021-11-19 13:26:08,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 5 states have internal predecessors, (120), 2 states have call successors, (44), 4 states have call predecessors, (44), 2 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) [2021-11-19 13:26:08,469 INFO L276 IsEmpty]: Start isEmpty. Operand 8848 states and 12710 transitions. [2021-11-19 13:26:08,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2021-11-19 13:26:08,474 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:26:08,474 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:26:08,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-19 13:26:08,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-19 13:26:08,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-19 13:26:09,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:26:09,075 INFO L402 AbstractCegarLoop]: === Iteration 21 === 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)] === [2021-11-19 13:26:09,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:26:09,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1615441070, now seen corresponding path program 1 times [2021-11-19 13:26:09,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:26:09,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [689922728] [2021-11-19 13:26:09,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:26:09,078 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:26:09,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:26:09,079 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:26:09,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-19 13:26:11,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:26:11,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 2196 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-19 13:26:11,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:26:15,247 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 186 proven. 48 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2021-11-19 13:26:15,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:26:20,754 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 24 proven. 60 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2021-11-19 13:26:20,754 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:26:20,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [689922728] [2021-11-19 13:26:20,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [689922728] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:26:20,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1856507435] [2021-11-19 13:26:20,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:26:20,755 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:26:20,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:26:20,756 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:26:20,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-19 13:26:22,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:26:22,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 2196 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:26:22,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:26:23,299 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 189 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-11-19 13:26:23,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:26:24,372 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 453 trivial. 0 not checked. [2021-11-19 13:26:24,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1856507435] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:26:24,372 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:26:24,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [16, 13] total 29 [2021-11-19 13:26:24,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551972393] [2021-11-19 13:26:24,373 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:26:24,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:26:24,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:26:24,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:26:24,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-11-19 13:26:24,374 INFO L87 Difference]: Start difference. First operand 8848 states and 12710 transitions. Second operand has 6 states, 6 states have (on average 25.166666666666668) internal successors, (151), 6 states have internal predecessors, (151), 2 states have call successors, (49), 2 states have call predecessors, (49), 2 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) [2021-11-19 13:26:25,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:26:25,853 INFO L93 Difference]: Finished difference Result 17920 states and 25779 transitions. [2021-11-19 13:26:25,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:26:25,854 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.166666666666668) internal successors, (151), 6 states have internal predecessors, (151), 2 states have call successors, (49), 2 states have call predecessors, (49), 2 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) Word has length 290 [2021-11-19 13:26:25,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:26:25,888 INFO L225 Difference]: With dead ends: 17920 [2021-11-19 13:26:25,888 INFO L226 Difference]: Without dead ends: 9093 [2021-11-19 13:26:25,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1158 GetRequests, 1129 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2021-11-19 13:26:25,932 INFO L933 BasicCegarLoop]: 2848 mSDtfsCounter, 158 mSDsluCounter, 8538 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 11386 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 13:26:25,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 11386 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 13:26:25,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9093 states. [2021-11-19 13:26:26,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9093 to 8876. [2021-11-19 13:26:26,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8876 states, 5701 states have (on average 1.2213646728644099) internal successors, (6963), 5958 states have internal predecessors, (6963), 2624 states have call successors, (2624), 553 states have call predecessors, (2624), 548 states have return successors, (3165), 2496 states have call predecessors, (3165), 2621 states have call successors, (3165) [2021-11-19 13:26:26,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8876 states to 8876 states and 12752 transitions. [2021-11-19 13:26:26,755 INFO L78 Accepts]: Start accepts. Automaton has 8876 states and 12752 transitions. Word has length 290 [2021-11-19 13:26:26,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:26:26,756 INFO L470 AbstractCegarLoop]: Abstraction has 8876 states and 12752 transitions. [2021-11-19 13:26:26,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.166666666666668) internal successors, (151), 6 states have internal predecessors, (151), 2 states have call successors, (49), 2 states have call predecessors, (49), 2 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) [2021-11-19 13:26:26,756 INFO L276 IsEmpty]: Start isEmpty. Operand 8876 states and 12752 transitions. [2021-11-19 13:26:26,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2021-11-19 13:26:26,764 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:26:26,764 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:26:26,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-19 13:26:27,034 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-11-19 13:26:27,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:26:27,181 INFO L402 AbstractCegarLoop]: === Iteration 22 === 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)] === [2021-11-19 13:26:27,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:26:27,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1686079717, now seen corresponding path program 1 times [2021-11-19 13:26:27,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:26:27,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [178775106] [2021-11-19 13:26:27,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:26:27,184 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:26:27,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:26:27,185 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:26:27,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-19 13:26:29,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:26:29,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 2242 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-19 13:26:29,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:26:33,469 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 186 proven. 48 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-11-19 13:26:33,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:26:39,645 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 24 proven. 60 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2021-11-19 13:26:39,646 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:26:39,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [178775106] [2021-11-19 13:26:39,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [178775106] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:26:39,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2118097373] [2021-11-19 13:26:39,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:26:39,646 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:26:39,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:26:39,647 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:26:39,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-19 13:26:40,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:26:40,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 2242 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:26:40,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:26:41,874 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 189 proven. 0 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2021-11-19 13:26:41,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:26:42,637 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2021-11-19 13:26:42,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2118097373] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:26:42,638 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:26:42,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [16, 13] total 26 [2021-11-19 13:26:42,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811973401] [2021-11-19 13:26:42,639 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:26:42,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:26:42,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:26:42,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:26:42,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-11-19 13:26:42,640 INFO L87 Difference]: Start difference. First operand 8876 states and 12752 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 2 states have call successors, (51), 2 states have call predecessors, (51), 2 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46) [2021-11-19 13:26:43,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:26:43,337 INFO L93 Difference]: Finished difference Result 18378 states and 26501 transitions. [2021-11-19 13:26:43,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:26:43,340 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 2 states have call successors, (51), 2 states have call predecessors, (51), 2 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46) Word has length 302 [2021-11-19 13:26:43,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:26:43,377 INFO L225 Difference]: With dead ends: 18378 [2021-11-19 13:26:43,377 INFO L226 Difference]: Without dead ends: 9523 [2021-11-19 13:26:43,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1204 GetRequests, 1180 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-11-19 13:26:43,562 INFO L933 BasicCegarLoop]: 2849 mSDtfsCounter, 205 mSDsluCounter, 2757 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 5606 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:26:43,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 5606 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:26:43,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9523 states. [2021-11-19 13:26:44,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9523 to 8878. [2021-11-19 13:26:44,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8878 states, 5703 states have (on average 1.221287041907768) internal successors, (6965), 5960 states have internal predecessors, (6965), 2624 states have call successors, (2624), 553 states have call predecessors, (2624), 548 states have return successors, (3165), 2496 states have call predecessors, (3165), 2621 states have call successors, (3165) [2021-11-19 13:26:44,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8878 states to 8878 states and 12754 transitions. [2021-11-19 13:26:44,238 INFO L78 Accepts]: Start accepts. Automaton has 8878 states and 12754 transitions. Word has length 302 [2021-11-19 13:26:44,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:26:44,239 INFO L470 AbstractCegarLoop]: Abstraction has 8878 states and 12754 transitions. [2021-11-19 13:26:44,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 2 states have call successors, (51), 2 states have call predecessors, (51), 2 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46) [2021-11-19 13:26:44,239 INFO L276 IsEmpty]: Start isEmpty. Operand 8878 states and 12754 transitions. [2021-11-19 13:26:44,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2021-11-19 13:26:44,246 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:26:44,246 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:26:44,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-19 13:26:44,472 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2021-11-19 13:26:44,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:26:44,659 INFO L402 AbstractCegarLoop]: === Iteration 23 === 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)] === [2021-11-19 13:26:44,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:26:44,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1570303005, now seen corresponding path program 1 times [2021-11-19 13:26:44,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:26:44,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1762393588] [2021-11-19 13:26:44,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:26:44,662 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:26:44,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:26:44,663 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:26:44,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-19 13:26:47,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:26:47,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 2242 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-19 13:26:47,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:26:51,756 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 186 proven. 48 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-11-19 13:26:51,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:26:57,815 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 24 proven. 60 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2021-11-19 13:26:57,815 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:26:57,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1762393588] [2021-11-19 13:26:57,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1762393588] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:26:57,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2011948269] [2021-11-19 13:26:57,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:26:57,816 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:26:57,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:26:57,817 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:26:57,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-19 13:27:01,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:27:01,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 2242 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-19 13:27:01,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:27:05,197 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 166 proven. 14 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-11-19 13:27:05,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:27:08,417 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-11-19 13:27:08,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2011948269] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:27:08,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285033653] [2021-11-19 13:27:08,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:27:08,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:27:08,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:27:08,421 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:27:08,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-19 13:27:10,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:27:10,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 2242 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 13:27:10,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:27:12,125 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 186 proven. 0 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2021-11-19 13:27:12,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:27:13,099 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2021-11-19 13:27:13,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285033653] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:27:13,099 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-19 13:27:13,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [16, 13, 9, 9, 8] total 33 [2021-11-19 13:27:13,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099107529] [2021-11-19 13:27:13,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:27:13,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:27:13,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:27:13,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:27:13,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2021-11-19 13:27:13,101 INFO L87 Difference]: Start difference. First operand 8878 states and 12754 transitions. Second operand has 8 states, 8 states have (on average 19.0) internal successors, (152), 7 states have internal predecessors, (152), 2 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (33), 3 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-19 13:27:15,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:27:15,545 INFO L93 Difference]: Finished difference Result 18002 states and 25893 transitions. [2021-11-19 13:27:15,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 13:27:15,546 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 19.0) internal successors, (152), 7 states have internal predecessors, (152), 2 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (33), 3 states have call predecessors, (33), 2 states have call successors, (33) Word has length 302 [2021-11-19 13:27:15,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:27:15,601 INFO L225 Difference]: With dead ends: 18002 [2021-11-19 13:27:15,601 INFO L226 Difference]: Without dead ends: 9145 [2021-11-19 13:27:15,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1810 GetRequests, 1774 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=123, Invalid=1209, Unknown=0, NotChecked=0, Total=1332 [2021-11-19 13:27:15,655 INFO L933 BasicCegarLoop]: 2827 mSDtfsCounter, 178 mSDsluCounter, 16755 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 19582 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:27:15,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 19582 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 13:27:15,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9145 states. [2021-11-19 13:27:16,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9145 to 8894. [2021-11-19 13:27:16,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8894 states, 5719 states have (on average 1.2206679489421228) internal successors, (6981), 5972 states have internal predecessors, (6981), 2624 states have call successors, (2624), 553 states have call predecessors, (2624), 548 states have return successors, (3165), 2496 states have call predecessors, (3165), 2621 states have call successors, (3165) [2021-11-19 13:27:16,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8894 states to 8894 states and 12770 transitions. [2021-11-19 13:27:16,557 INFO L78 Accepts]: Start accepts. Automaton has 8894 states and 12770 transitions. Word has length 302 [2021-11-19 13:27:16,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:27:16,558 INFO L470 AbstractCegarLoop]: Abstraction has 8894 states and 12770 transitions. [2021-11-19 13:27:16,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.0) internal successors, (152), 7 states have internal predecessors, (152), 2 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (33), 3 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-19 13:27:16,558 INFO L276 IsEmpty]: Start isEmpty. Operand 8894 states and 12770 transitions. [2021-11-19 13:27:16,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2021-11-19 13:27:16,564 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:27:16,565 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:27:16,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2021-11-19 13:27:16,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-19 13:27:17,044 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2021-11-19 13:27:17,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:27:17,180 INFO L402 AbstractCegarLoop]: === Iteration 24 === 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)] === [2021-11-19 13:27:17,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:27:17,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1360149695, now seen corresponding path program 1 times [2021-11-19 13:27:17,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:27:17,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1815118562] [2021-11-19 13:27:17,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:27:17,184 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:27:17,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:27:17,185 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:27:17,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-19 13:27:19,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:27:20,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 2386 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-19 13:27:20,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:27:23,290 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 284 proven. 42 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-11-19 13:27:23,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:27:27,398 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 24 proven. 72 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2021-11-19 13:27:27,398 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:27:27,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1815118562] [2021-11-19 13:27:27,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1815118562] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:27:27,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [377745775] [2021-11-19 13:27:27,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:27:27,398 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:27:27,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:27:27,399 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:27:27,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-11-19 13:27:31,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:27:31,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 2386 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-19 13:27:31,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:27:34,255 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 264 proven. 14 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2021-11-19 13:27:34,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:27:35,625 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 515 trivial. 0 not checked. [2021-11-19 13:27:35,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [377745775] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:27:35,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879900297] [2021-11-19 13:27:35,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:27:35,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:27:35,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:27:35,627 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:27:35,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-19 13:27:37,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:27:37,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 2386 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:27:37,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:27:38,625 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 263 proven. 0 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2021-11-19 13:27:38,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:27:39,545 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 543 trivial. 0 not checked. [2021-11-19 13:27:39,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879900297] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:27:39,545 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-19 13:27:39,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [16, 13, 9, 9] total 34 [2021-11-19 13:27:39,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943500060] [2021-11-19 13:27:39,546 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:27:39,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:27:39,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:27:39,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:27:39,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1015, Unknown=0, NotChecked=0, Total=1122 [2021-11-19 13:27:39,553 INFO L87 Difference]: Start difference. First operand 8894 states and 12770 transitions. Second operand has 4 states, 4 states have (on average 41.25) internal successors, (165), 4 states have internal predecessors, (165), 2 states have call successors, (59), 2 states have call predecessors, (59), 2 states have return successors, (54), 2 states have call predecessors, (54), 2 states have call successors, (54) [2021-11-19 13:27:40,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:27:40,697 INFO L93 Difference]: Finished difference Result 17823 states and 25633 transitions. [2021-11-19 13:27:40,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:27:40,698 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 4 states have internal predecessors, (165), 2 states have call successors, (59), 2 states have call predecessors, (59), 2 states have return successors, (54), 2 states have call predecessors, (54), 2 states have call successors, (54) Word has length 314 [2021-11-19 13:27:40,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:27:40,732 INFO L225 Difference]: With dead ends: 17823 [2021-11-19 13:27:40,732 INFO L226 Difference]: Without dead ends: 8950 [2021-11-19 13:27:40,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1878 GetRequests, 1845 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=107, Invalid=1015, Unknown=0, NotChecked=0, Total=1122 [2021-11-19 13:27:40,778 INFO L933 BasicCegarLoop]: 2791 mSDtfsCounter, 80 mSDsluCounter, 5390 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 8181 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:27:40,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 8181 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:27:40,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8950 states. [2021-11-19 13:27:41,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8950 to 8950. [2021-11-19 13:27:41,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8950 states, 5743 states have (on average 1.2200940275117533) internal successors, (7007), 5995 states have internal predecessors, (7007), 2656 states have call successors, (2656), 553 states have call predecessors, (2656), 548 states have return successors, (3194), 2529 states have call predecessors, (3194), 2653 states have call successors, (3194) [2021-11-19 13:27:41,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8950 states to 8950 states and 12857 transitions. [2021-11-19 13:27:41,666 INFO L78 Accepts]: Start accepts. Automaton has 8950 states and 12857 transitions. Word has length 314 [2021-11-19 13:27:41,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:27:41,666 INFO L470 AbstractCegarLoop]: Abstraction has 8950 states and 12857 transitions. [2021-11-19 13:27:41,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 4 states have internal predecessors, (165), 2 states have call successors, (59), 2 states have call predecessors, (59), 2 states have return successors, (54), 2 states have call predecessors, (54), 2 states have call successors, (54) [2021-11-19 13:27:41,666 INFO L276 IsEmpty]: Start isEmpty. Operand 8950 states and 12857 transitions. [2021-11-19 13:27:41,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 527 [2021-11-19 13:27:41,676 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:27:41,677 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:27:41,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2021-11-19 13:27:41,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-11-19 13:27:42,173 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-11-19 13:27:42,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:27:42,304 INFO L402 AbstractCegarLoop]: === Iteration 25 === 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)] === [2021-11-19 13:27:42,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:27:42,304 INFO L85 PathProgramCache]: Analyzing trace with hash -558244247, now seen corresponding path program 1 times [2021-11-19 13:27:42,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:27:42,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1873944186] [2021-11-19 13:27:42,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:27:42,306 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:27:42,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:27:42,307 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:27:42,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-19 13:27:44,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:27:44,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 2601 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-19 13:27:44,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:27:49,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1701 backedges. 69 proven. 42 refuted. 0 times theorem prover too weak. 1590 trivial. 0 not checked. [2021-11-19 13:27:49,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:27:53,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1701 backedges. 24 proven. 42 refuted. 0 times theorem prover too weak. 1635 trivial. 0 not checked. [2021-11-19 13:27:53,842 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:27:53,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1873944186] [2021-11-19 13:27:53,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1873944186] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:27:53,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [740321782] [2021-11-19 13:27:53,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:27:53,843 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:27:53,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:27:53,856 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:27:53,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2021-11-19 13:27:55,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:27:55,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 2601 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:27:55,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:27:56,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1701 backedges. 770 proven. 0 refuted. 0 times theorem prover too weak. 931 trivial. 0 not checked. [2021-11-19 13:27:56,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:27:58,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1701 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1701 trivial. 0 not checked. [2021-11-19 13:27:58,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [740321782] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:27:58,070 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:27:58,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [16, 13] total 28 [2021-11-19 13:27:58,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082412555] [2021-11-19 13:27:58,071 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:27:58,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:27:58,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:27:58,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:27:58,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-11-19 13:27:58,073 INFO L87 Difference]: Start difference. First operand 8950 states and 12857 transitions. Second operand has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 2 states have call successors, (68), 2 states have call predecessors, (68), 2 states have return successors, (64), 2 states have call predecessors, (64), 2 states have call successors, (64) [2021-11-19 13:27:58,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:27:58,989 INFO L93 Difference]: Finished difference Result 17895 states and 25750 transitions. [2021-11-19 13:27:58,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:27:58,989 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 2 states have call successors, (68), 2 states have call predecessors, (68), 2 states have return successors, (64), 2 states have call predecessors, (64), 2 states have call successors, (64) Word has length 526 [2021-11-19 13:27:58,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:27:59,025 INFO L225 Difference]: With dead ends: 17895 [2021-11-19 13:27:59,025 INFO L226 Difference]: Without dead ends: 8966 [2021-11-19 13:27:59,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2100 GetRequests, 2074 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-11-19 13:27:59,075 INFO L933 BasicCegarLoop]: 2761 mSDtfsCounter, 21 mSDsluCounter, 2742 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 5503 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:27:59,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 5503 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:27:59,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8966 states. [2021-11-19 13:27:59,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8966 to 8966. [2021-11-19 13:27:59,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8966 states, 5751 states have (on average 1.219961745783342) internal successors, (7016), 6004 states have internal predecessors, (7016), 2664 states have call successors, (2664), 553 states have call predecessors, (2664), 548 states have return successors, (3202), 2536 states have call predecessors, (3202), 2661 states have call successors, (3202) [2021-11-19 13:27:59,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8966 states to 8966 states and 12882 transitions. [2021-11-19 13:27:59,982 INFO L78 Accepts]: Start accepts. Automaton has 8966 states and 12882 transitions. Word has length 526 [2021-11-19 13:27:59,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:27:59,984 INFO L470 AbstractCegarLoop]: Abstraction has 8966 states and 12882 transitions. [2021-11-19 13:27:59,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 2 states have call successors, (68), 2 states have call predecessors, (68), 2 states have return successors, (64), 2 states have call predecessors, (64), 2 states have call successors, (64) [2021-11-19 13:27:59,984 INFO L276 IsEmpty]: Start isEmpty. Operand 8966 states and 12882 transitions. [2021-11-19 13:28:00,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 707 [2021-11-19 13:28:00,000 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:28:00,001 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:28:00,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-11-19 13:28:00,231 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (42)] Ended with exit code 0 [2021-11-19 13:28:00,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:28:00,415 INFO L402 AbstractCegarLoop]: === Iteration 26 === 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)] === [2021-11-19 13:28:00,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:28:00,416 INFO L85 PathProgramCache]: Analyzing trace with hash 56003887, now seen corresponding path program 1 times [2021-11-19 13:28:00,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:28:00,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1023359917] [2021-11-19 13:28:00,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:28:00,418 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:28:00,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:28:00,419 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:28:00,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-19 13:28:03,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:28:03,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 2925 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-19 13:28:03,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:28:08,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4193 backedges. 69 proven. 42 refuted. 0 times theorem prover too weak. 4082 trivial. 0 not checked. [2021-11-19 13:28:08,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:28:13,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4193 backedges. 24 proven. 42 refuted. 0 times theorem prover too weak. 4127 trivial. 0 not checked. [2021-11-19 13:28:13,465 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:28:13,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1023359917] [2021-11-19 13:28:13,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1023359917] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:28:13,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1672911539] [2021-11-19 13:28:13,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:28:13,465 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:28:13,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:28:13,466 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:28:13,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2021-11-19 13:28:15,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:28:15,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 2925 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:28:15,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:28:17,427 INFO L134 CoverageAnalysis]: Checked inductivity of 4193 backedges. 1694 proven. 14 refuted. 0 times theorem prover too weak. 2485 trivial. 0 not checked. [2021-11-19 13:28:17,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:28:20,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4193 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4179 trivial. 0 not checked. [2021-11-19 13:28:20,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1672911539] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:28:20,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210234085] [2021-11-19 13:28:20,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:28:20,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:28:20,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:28:20,248 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:28:20,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-19 13:28:22,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:28:22,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 2925 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:28:22,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:28:24,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4193 backedges. 1694 proven. 14 refuted. 0 times theorem prover too weak. 2485 trivial. 0 not checked. [2021-11-19 13:28:24,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:28:26,257 INFO L134 CoverageAnalysis]: Checked inductivity of 4193 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4179 trivial. 0 not checked. [2021-11-19 13:28:26,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210234085] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:28:26,257 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 13:28:26,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 5, 5, 5, 5] total 32 [2021-11-19 13:28:26,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767011961] [2021-11-19 13:28:26,259 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 13:28:26,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-19 13:28:26,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:28:26,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-19 13:28:26,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2021-11-19 13:28:26,271 INFO L87 Difference]: Start difference. First operand 8966 states and 12882 transitions. Second operand has 32 states, 26 states have (on average 12.038461538461538) internal successors, (313), 23 states have internal predecessors, (313), 17 states have call successors, (163), 4 states have call predecessors, (163), 6 states have return successors, (160), 17 states have call predecessors, (160), 15 states have call successors, (160) [2021-11-19 13:28:32,548 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:28:37,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:28:37,861 INFO L93 Difference]: Finished difference Result 18060 states and 26018 transitions. [2021-11-19 13:28:37,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-19 13:28:37,861 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 26 states have (on average 12.038461538461538) internal successors, (313), 23 states have internal predecessors, (313), 17 states have call successors, (163), 4 states have call predecessors, (163), 6 states have return successors, (160), 17 states have call predecessors, (160), 15 states have call successors, (160) Word has length 706 [2021-11-19 13:28:37,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:28:37,904 INFO L225 Difference]: With dead ends: 18060 [2021-11-19 13:28:37,904 INFO L226 Difference]: Without dead ends: 9115 [2021-11-19 13:28:37,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4237 GetRequests, 4202 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=140, Invalid=1192, Unknown=0, NotChecked=0, Total=1332 [2021-11-19 13:28:37,953 INFO L933 BasicCegarLoop]: 2892 mSDtfsCounter, 465 mSDsluCounter, 51254 mSDsCounter, 0 mSdLazyCounter, 1361 mSolverCounterSat, 198 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 54146 SdHoareTripleChecker+Invalid, 1560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1361 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2021-11-19 13:28:37,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [509 Valid, 54146 Invalid, 1560 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [198 Valid, 1361 Invalid, 1 Unknown, 0 Unchecked, 9.5s Time] [2021-11-19 13:28:37,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9115 states. [2021-11-19 13:28:38,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9115 to 8934. [2021-11-19 13:28:38,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8934 states, 5707 states have (on average 1.2178026984405117) internal successors, (6950), 5959 states have internal predecessors, (6950), 2677 states have call successors, (2677), 552 states have call predecessors, (2677), 547 states have return successors, (3215), 2546 states have call predecessors, (3215), 2674 states have call successors, (3215) [2021-11-19 13:28:38,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8934 states to 8934 states and 12842 transitions. [2021-11-19 13:28:38,846 INFO L78 Accepts]: Start accepts. Automaton has 8934 states and 12842 transitions. Word has length 706 [2021-11-19 13:28:38,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:28:38,846 INFO L470 AbstractCegarLoop]: Abstraction has 8934 states and 12842 transitions. [2021-11-19 13:28:38,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 26 states have (on average 12.038461538461538) internal successors, (313), 23 states have internal predecessors, (313), 17 states have call successors, (163), 4 states have call predecessors, (163), 6 states have return successors, (160), 17 states have call predecessors, (160), 15 states have call successors, (160) [2021-11-19 13:28:38,847 INFO L276 IsEmpty]: Start isEmpty. Operand 8934 states and 12842 transitions. [2021-11-19 13:28:38,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 592 [2021-11-19 13:28:38,862 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:28:38,862 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 13, 13, 11, 11, 11, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:28:38,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (44)] Forceful destruction successful, exit code 0 [2021-11-19 13:28:39,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-11-19 13:28:39,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-19 13:28:39,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:28:39,484 INFO L402 AbstractCegarLoop]: === Iteration 27 === 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)] === [2021-11-19 13:28:39,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:28:39,484 INFO L85 PathProgramCache]: Analyzing trace with hash 2054767217, now seen corresponding path program 1 times [2021-11-19 13:28:39,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:28:39,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2132517156] [2021-11-19 13:28:39,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:28:39,488 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:28:39,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:28:39,489 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:28:39,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-11-19 13:28:41,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:28:42,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 2605 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-19 13:28:42,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:28:45,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1732 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1726 trivial. 0 not checked. [2021-11-19 13:28:45,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:28:48,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1732 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1726 trivial. 0 not checked. [2021-11-19 13:28:48,780 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:28:48,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2132517156] [2021-11-19 13:28:48,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2132517156] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:28:48,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1458651193] [2021-11-19 13:28:48,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:28:48,781 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:28:48,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:28:48,783 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:28:48,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2021-11-19 13:28:50,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:28:50,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 2605 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:28:50,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:28:53,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1732 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1732 trivial. 0 not checked. [2021-11-19 13:28:53,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:28:55,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1732 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1732 trivial. 0 not checked. [2021-11-19 13:28:55,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1458651193] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:28:55,731 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:28:55,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [16, 16] total 20 [2021-11-19 13:28:55,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138990771] [2021-11-19 13:28:55,732 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:28:55,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:28:55,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:28:55,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:28:55,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 13:28:55,734 INFO L87 Difference]: Start difference. First operand 8934 states and 12842 transitions. Second operand has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 3 states have call successors, (171), 3 states have call predecessors, (171), 3 states have return successors, (162), 3 states have call predecessors, (162), 3 states have call successors, (162) [2021-11-19 13:28:57,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:28:57,138 INFO L93 Difference]: Finished difference Result 21572 states and 31049 transitions. [2021-11-19 13:28:57,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:28:57,138 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 3 states have call successors, (171), 3 states have call predecessors, (171), 3 states have return successors, (162), 3 states have call predecessors, (162), 3 states have call successors, (162) Word has length 591 [2021-11-19 13:28:57,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:28:57,221 INFO L225 Difference]: With dead ends: 21572 [2021-11-19 13:28:57,222 INFO L226 Difference]: Without dead ends: 15777 [2021-11-19 13:28:57,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2360 GetRequests, 2342 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-11-19 13:28:57,265 INFO L933 BasicCegarLoop]: 3528 mSDtfsCounter, 2669 mSDsluCounter, 2711 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2669 SdHoareTripleChecker+Valid, 6239 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:28:57,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2669 Valid, 6239 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:28:57,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15777 states. [2021-11-19 13:28:58,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15777 to 15733. [2021-11-19 13:28:58,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15733 states, 10099 states have (on average 1.2185364887612635) internal successors, (12306), 10551 states have internal predecessors, (12306), 4683 states have call successors, (4683), 953 states have call predecessors, (4683), 948 states have return successors, (5644), 4454 states have call predecessors, (5644), 4680 states have call successors, (5644) [2021-11-19 13:28:58,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15733 states to 15733 states and 22633 transitions. [2021-11-19 13:28:58,752 INFO L78 Accepts]: Start accepts. Automaton has 15733 states and 22633 transitions. Word has length 591 [2021-11-19 13:28:58,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:28:58,752 INFO L470 AbstractCegarLoop]: Abstraction has 15733 states and 22633 transitions. [2021-11-19 13:28:58,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 3 states have call successors, (171), 3 states have call predecessors, (171), 3 states have return successors, (162), 3 states have call predecessors, (162), 3 states have call successors, (162) [2021-11-19 13:28:58,753 INFO L276 IsEmpty]: Start isEmpty. Operand 15733 states and 22633 transitions. [2021-11-19 13:28:58,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1099 [2021-11-19 13:28:58,765 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:28:58,766 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 55, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 27, 27, 27, 27, 27, 27, 27, 27, 12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:28:58,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (47)] Forceful destruction successful, exit code 0 [2021-11-19 13:28:59,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-11-19 13:28:59,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:28:59,167 INFO L402 AbstractCegarLoop]: === Iteration 28 === 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)] === [2021-11-19 13:28:59,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:28:59,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1967259234, now seen corresponding path program 1 times [2021-11-19 13:28:59,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:28:59,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1318907496] [2021-11-19 13:28:59,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:28:59,171 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:28:59,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:28:59,172 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:28:59,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-11-19 13:29:02,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:29:03,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 3700 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:29:03,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:29:08,043 INFO L134 CoverageAnalysis]: Checked inductivity of 13089 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 12963 trivial. 0 not checked. [2021-11-19 13:29:08,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:29:11,033 INFO L134 CoverageAnalysis]: Checked inductivity of 13089 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13089 trivial. 0 not checked. [2021-11-19 13:29:11,033 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:29:11,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1318907496] [2021-11-19 13:29:11,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1318907496] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:29:11,034 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:29:11,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 13:29:11,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384687991] [2021-11-19 13:29:11,035 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:29:11,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:29:11,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:29:11,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:29:11,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:29:11,039 INFO L87 Difference]: Start difference. First operand 15733 states and 22633 transitions. Second operand has 4 states, 4 states have (on average 57.25) internal successors, (229), 4 states have internal predecessors, (229), 2 states have call successors, (111), 2 states have call predecessors, (111), 2 states have return successors, (107), 2 states have call predecessors, (107), 2 states have call successors, (107) [2021-11-19 13:29:13,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:29:13,726 INFO L93 Difference]: Finished difference Result 35179 states and 50993 transitions. [2021-11-19 13:29:13,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:29:13,727 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 57.25) internal successors, (229), 4 states have internal predecessors, (229), 2 states have call successors, (111), 2 states have call predecessors, (111), 2 states have return successors, (107), 2 states have call predecessors, (107), 2 states have call successors, (107) Word has length 1098 [2021-11-19 13:29:13,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:29:13,865 INFO L225 Difference]: With dead ends: 35179 [2021-11-19 13:29:13,865 INFO L226 Difference]: Without dead ends: 19465 [2021-11-19 13:29:13,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2194 GetRequests, 2192 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:29:13,994 INFO L933 BasicCegarLoop]: 3180 mSDtfsCounter, 554 mSDsluCounter, 5756 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 8936 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 13:29:13,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [718 Valid, 8936 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 13:29:14,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19465 states. [2021-11-19 13:29:15,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19465 to 15765. [2021-11-19 13:29:15,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15765 states, 10131 states have (on average 1.2186358701016682) internal successors, (12346), 10583 states have internal predecessors, (12346), 4683 states have call successors, (4683), 953 states have call predecessors, (4683), 948 states have return successors, (5644), 4454 states have call predecessors, (5644), 4680 states have call successors, (5644) [2021-11-19 13:29:16,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15765 states to 15765 states and 22673 transitions. [2021-11-19 13:29:16,055 INFO L78 Accepts]: Start accepts. Automaton has 15765 states and 22673 transitions. Word has length 1098 [2021-11-19 13:29:16,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:29:16,056 INFO L470 AbstractCegarLoop]: Abstraction has 15765 states and 22673 transitions. [2021-11-19 13:29:16,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.25) internal successors, (229), 4 states have internal predecessors, (229), 2 states have call successors, (111), 2 states have call predecessors, (111), 2 states have return successors, (107), 2 states have call predecessors, (107), 2 states have call successors, (107) [2021-11-19 13:29:16,056 INFO L276 IsEmpty]: Start isEmpty. Operand 15765 states and 22673 transitions. [2021-11-19 13:29:16,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1102 [2021-11-19 13:29:16,070 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:29:16,071 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 55, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 27, 27, 27, 27, 27, 27, 27, 27, 12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:29:16,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2021-11-19 13:29:16,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:29:16,285 INFO L402 AbstractCegarLoop]: === Iteration 29 === 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)] === [2021-11-19 13:29:16,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:29:16,286 INFO L85 PathProgramCache]: Analyzing trace with hash -2132044230, now seen corresponding path program 1 times [2021-11-19 13:29:16,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:29:16,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [790426214] [2021-11-19 13:29:16,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:29:16,292 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:29:16,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:29:16,293 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:29:16,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-11-19 13:29:20,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:29:20,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 3704 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 13:29:20,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:29:25,930 INFO L134 CoverageAnalysis]: Checked inductivity of 13089 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 13039 trivial. 0 not checked. [2021-11-19 13:29:25,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:29:30,148 INFO L134 CoverageAnalysis]: Checked inductivity of 13089 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13089 trivial. 0 not checked. [2021-11-19 13:29:30,149 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:29:30,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [790426214] [2021-11-19 13:29:30,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [790426214] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:29:30,149 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:29:30,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2021-11-19 13:29:30,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777164488] [2021-11-19 13:29:30,150 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:29:30,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 13:29:30,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:29:30,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 13:29:30,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:29:30,152 INFO L87 Difference]: Start difference. First operand 15765 states and 22673 transitions. Second operand has 12 states, 10 states have (on average 21.8) internal successors, (218), 10 states have internal predecessors, (218), 4 states have call successors, (104), 2 states have call predecessors, (104), 5 states have return successors, (100), 5 states have call predecessors, (100), 4 states have call successors, (100) [2021-11-19 13:29:33,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:29:33,858 INFO L93 Difference]: Finished difference Result 31549 states and 45907 transitions. [2021-11-19 13:29:33,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 13:29:33,859 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 21.8) internal successors, (218), 10 states have internal predecessors, (218), 4 states have call successors, (104), 2 states have call predecessors, (104), 5 states have return successors, (100), 5 states have call predecessors, (100), 4 states have call successors, (100) Word has length 1101 [2021-11-19 13:29:33,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:29:33,917 INFO L225 Difference]: With dead ends: 31549 [2021-11-19 13:29:33,917 INFO L226 Difference]: Without dead ends: 15803 [2021-11-19 13:29:33,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2204 GetRequests, 2190 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-11-19 13:29:33,996 INFO L933 BasicCegarLoop]: 2726 mSDtfsCounter, 8 mSDsluCounter, 27197 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 29923 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-19 13:29:33,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 29923 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-19 13:29:34,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15803 states. [2021-11-19 13:29:35,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15803 to 15791. [2021-11-19 13:29:35,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15791 states, 10153 states have (on average 1.2181621195705703) internal successors, (12368), 10605 states have internal predecessors, (12368), 4683 states have call successors, (4683), 953 states have call predecessors, (4683), 952 states have return successors, (5660), 4458 states have call predecessors, (5660), 4680 states have call successors, (5660) [2021-11-19 13:29:35,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15791 states to 15791 states and 22711 transitions. [2021-11-19 13:29:35,566 INFO L78 Accepts]: Start accepts. Automaton has 15791 states and 22711 transitions. Word has length 1101 [2021-11-19 13:29:35,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:29:35,567 INFO L470 AbstractCegarLoop]: Abstraction has 15791 states and 22711 transitions. [2021-11-19 13:29:35,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 21.8) internal successors, (218), 10 states have internal predecessors, (218), 4 states have call successors, (104), 2 states have call predecessors, (104), 5 states have return successors, (100), 5 states have call predecessors, (100), 4 states have call successors, (100) [2021-11-19 13:29:35,568 INFO L276 IsEmpty]: Start isEmpty. Operand 15791 states and 22711 transitions. [2021-11-19 13:29:35,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1286 [2021-11-19 13:29:35,756 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:29:35,757 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 55, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 27, 27, 27, 27, 27, 27, 27, 27, 18, 18, 18, 8, 8, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:29:35,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2021-11-19 13:29:35,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:29:35,971 INFO L402 AbstractCegarLoop]: === Iteration 30 === 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)] === [2021-11-19 13:29:35,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:29:35,972 INFO L85 PathProgramCache]: Analyzing trace with hash -996894109, now seen corresponding path program 1 times [2021-11-19 13:29:35,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:29:35,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [970522705] [2021-11-19 13:29:35,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:29:35,979 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:29:35,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:29:35,981 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:29:36,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-11-19 13:29:40,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:29:40,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 4340 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:29:40,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:29:46,688 INFO L134 CoverageAnalysis]: Checked inductivity of 13684 backedges. 528 proven. 0 refuted. 0 times theorem prover too weak. 13156 trivial. 0 not checked. [2021-11-19 13:29:46,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:29:50,683 INFO L134 CoverageAnalysis]: Checked inductivity of 13684 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 13622 trivial. 0 not checked. [2021-11-19 13:29:50,683 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:29:50,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [970522705] [2021-11-19 13:29:50,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [970522705] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:29:50,684 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:29:50,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 13:29:50,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144770880] [2021-11-19 13:29:50,685 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:29:50,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:29:50,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:29:50,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:29:50,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:29:50,687 INFO L87 Difference]: Start difference. First operand 15791 states and 22711 transitions. Second operand has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 3 states have call successors, (140), 2 states have call predecessors, (140), 2 states have return successors, (136), 3 states have call predecessors, (136), 3 states have call successors, (136) [2021-11-19 13:29:52,064 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:29:52,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:29:52,931 INFO L93 Difference]: Finished difference Result 22657 states and 32592 transitions. [2021-11-19 13:29:52,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:29:52,932 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 3 states have call successors, (140), 2 states have call predecessors, (140), 2 states have return successors, (136), 3 states have call predecessors, (136), 3 states have call successors, (136) Word has length 1285 [2021-11-19 13:29:52,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:29:52,965 INFO L225 Difference]: With dead ends: 22657 [2021-11-19 13:29:52,966 INFO L226 Difference]: Without dead ends: 6885 [2021-11-19 13:29:53,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2568 GetRequests, 2567 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:29:53,202 INFO L933 BasicCegarLoop]: 2702 mSDtfsCounter, 247 mSDsluCounter, 2326 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 5028 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-19 13:29:53,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 5028 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-19 13:29:53,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6885 states. [2021-11-19 13:29:53,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6885 to 6885. [2021-11-19 13:29:53,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6885 states, 4451 states have (on average 1.2141091889463043) internal successors, (5404), 4647 states have internal predecessors, (5404), 2022 states have call successors, (2022), 409 states have call predecessors, (2022), 409 states have return successors, (2434), 1924 states have call predecessors, (2434), 2019 states have call successors, (2434) [2021-11-19 13:29:53,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6885 states to 6885 states and 9860 transitions. [2021-11-19 13:29:53,948 INFO L78 Accepts]: Start accepts. Automaton has 6885 states and 9860 transitions. Word has length 1285 [2021-11-19 13:29:53,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:29:53,949 INFO L470 AbstractCegarLoop]: Abstraction has 6885 states and 9860 transitions. [2021-11-19 13:29:53,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 3 states have call successors, (140), 2 states have call predecessors, (140), 2 states have return successors, (136), 3 states have call predecessors, (136), 3 states have call successors, (136) [2021-11-19 13:29:53,949 INFO L276 IsEmpty]: Start isEmpty. Operand 6885 states and 9860 transitions. [2021-11-19 13:29:53,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1102 [2021-11-19 13:29:53,961 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:29:53,962 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 55, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 27, 27, 27, 27, 27, 27, 27, 27, 12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:29:54,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2021-11-19 13:29:54,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:29:54,167 INFO L402 AbstractCegarLoop]: === Iteration 31 === 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)] === [2021-11-19 13:29:54,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:29:54,168 INFO L85 PathProgramCache]: Analyzing trace with hash 2069150648, now seen corresponding path program 1 times [2021-11-19 13:29:54,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:29:54,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2014155733] [2021-11-19 13:29:54,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:29:54,171 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:29:54,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:29:54,172 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:29:54,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-11-19 13:29:58,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:29:58,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 3706 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 13:29:58,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:30:03,150 INFO L134 CoverageAnalysis]: Checked inductivity of 13089 backedges. 50 proven. 3 refuted. 0 times theorem prover too weak. 13036 trivial. 0 not checked. [2021-11-19 13:30:03,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:30:06,595 INFO L134 CoverageAnalysis]: Checked inductivity of 13089 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13086 trivial. 0 not checked. [2021-11-19 13:30:06,596 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:30:06,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2014155733] [2021-11-19 13:30:06,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2014155733] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:30:06,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2123203222] [2021-11-19 13:30:06,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:06,596 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:30:06,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:30:06,598 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:30:06,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2021-11-19 13:30:08,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:08,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 3706 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 13:30:08,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:30:11,732 INFO L134 CoverageAnalysis]: Checked inductivity of 13089 backedges. 3542 proven. 186 refuted. 0 times theorem prover too weak. 9361 trivial. 0 not checked. [2021-11-19 13:30:11,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:30:15,781 INFO L134 CoverageAnalysis]: Checked inductivity of 13089 backedges. 0 proven. 186 refuted. 0 times theorem prover too weak. 12903 trivial. 0 not checked. [2021-11-19 13:30:15,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2123203222] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:30:15,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982961618] [2021-11-19 13:30:15,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:15,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:30:15,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:30:15,783 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:30:15,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-19 13:30:17,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:18,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 3706 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 13:30:18,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:30:20,888 INFO L134 CoverageAnalysis]: Checked inductivity of 13089 backedges. 3542 proven. 186 refuted. 0 times theorem prover too weak. 9361 trivial. 0 not checked. [2021-11-19 13:30:20,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:30:24,259 INFO L134 CoverageAnalysis]: Checked inductivity of 13089 backedges. 0 proven. 186 refuted. 0 times theorem prover too weak. 12903 trivial. 0 not checked. [2021-11-19 13:30:24,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982961618] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:30:24,260 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 13:30:24,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 9, 9, 9, 9] total 24 [2021-11-19 13:30:24,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608010649] [2021-11-19 13:30:24,262 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 13:30:24,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-19 13:30:24,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:30:24,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-19 13:30:24,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2021-11-19 13:30:24,267 INFO L87 Difference]: Start difference. First operand 6885 states and 9860 transitions. Second operand has 24 states, 24 states have (on average 13.625) internal successors, (327), 24 states have internal predecessors, (327), 16 states have call successors, (191), 2 states have call predecessors, (191), 2 states have return successors, (187), 16 states have call predecessors, (187), 16 states have call successors, (187) [2021-11-19 13:30:28,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:30:28,805 INFO L93 Difference]: Finished difference Result 13789 states and 19799 transitions. [2021-11-19 13:30:28,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 13:30:28,806 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 13.625) internal successors, (327), 24 states have internal predecessors, (327), 16 states have call successors, (191), 2 states have call predecessors, (191), 2 states have return successors, (187), 16 states have call predecessors, (187), 16 states have call successors, (187) Word has length 1101 [2021-11-19 13:30:28,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:30:28,833 INFO L225 Difference]: With dead ends: 13789 [2021-11-19 13:30:28,834 INFO L226 Difference]: Without dead ends: 6923 [2021-11-19 13:30:28,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6606 GetRequests, 6578 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2021-11-19 13:30:28,872 INFO L933 BasicCegarLoop]: 2849 mSDtfsCounter, 536 mSDsluCounter, 24990 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 27839 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-19 13:30:28,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [643 Valid, 27839 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-11-19 13:30:28,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6923 states. [2021-11-19 13:30:29,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6923 to 6923. [2021-11-19 13:30:29,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6923 states, 4473 states have (on average 1.2135032416722558) internal successors, (5428), 4671 states have internal predecessors, (5428), 2038 states have call successors, (2038), 409 states have call predecessors, (2038), 409 states have return successors, (2450), 1938 states have call predecessors, (2450), 2035 states have call successors, (2450) [2021-11-19 13:30:29,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6923 states to 6923 states and 9916 transitions. [2021-11-19 13:30:29,588 INFO L78 Accepts]: Start accepts. Automaton has 6923 states and 9916 transitions. Word has length 1101 [2021-11-19 13:30:29,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:30:29,588 INFO L470 AbstractCegarLoop]: Abstraction has 6923 states and 9916 transitions. [2021-11-19 13:30:29,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 13.625) internal successors, (327), 24 states have internal predecessors, (327), 16 states have call successors, (191), 2 states have call predecessors, (191), 2 states have return successors, (187), 16 states have call predecessors, (187), 16 states have call successors, (187) [2021-11-19 13:30:29,589 INFO L276 IsEmpty]: Start isEmpty. Operand 6923 states and 9916 transitions. [2021-11-19 13:30:29,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1478 [2021-11-19 13:30:29,608 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:29,609 INFO L514 BasicCegarLoop]: trace histogram [67, 67, 67, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 33, 33, 33, 33, 33, 33, 33, 33, 18, 18, 18, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:30:29,679 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (51)] Ended with exit code 0 [2021-11-19 13:30:29,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (52)] Forceful destruction successful, exit code 0 [2021-11-19 13:30:30,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-11-19 13:30:30,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:30:30,212 INFO L402 AbstractCegarLoop]: === Iteration 32 === 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)] === [2021-11-19 13:30:30,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:30,212 INFO L85 PathProgramCache]: Analyzing trace with hash -466840183, now seen corresponding path program 1 times [2021-11-19 13:30:30,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:30:30,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1815828694] [2021-11-19 13:30:30,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:30,216 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:30:30,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:30:30,217 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:30:30,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-11-19 13:30:36,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:37,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 4699 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 13:30:37,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:30:43,367 INFO L134 CoverageAnalysis]: Checked inductivity of 20010 backedges. 93 proven. 21 refuted. 0 times theorem prover too weak. 19896 trivial. 0 not checked. [2021-11-19 13:30:43,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:30:48,845 INFO L134 CoverageAnalysis]: Checked inductivity of 20010 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 19976 trivial. 0 not checked. [2021-11-19 13:30:48,845 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:30:48,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1815828694] [2021-11-19 13:30:48,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1815828694] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:30:48,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [572852961] [2021-11-19 13:30:48,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:48,846 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:30:48,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:30:48,848 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:30:48,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2021-11-19 13:30:54,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:54,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 4699 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 13:30:54,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:31:00,533 INFO L134 CoverageAnalysis]: Checked inductivity of 20010 backedges. 93 proven. 21 refuted. 0 times theorem prover too weak. 19896 trivial. 0 not checked. [2021-11-19 13:31:00,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:31:04,335 INFO L134 CoverageAnalysis]: Checked inductivity of 20010 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 19976 trivial. 0 not checked. [2021-11-19 13:31:04,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [572852961] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:31:04,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572013630] [2021-11-19 13:31:04,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:31:04,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:31:04,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:31:04,336 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:31:04,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-19 13:31:06,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:31:07,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 4699 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 13:31:07,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:31:17,442 INFO L134 CoverageAnalysis]: Checked inductivity of 20010 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20010 trivial. 0 not checked. [2021-11-19 13:31:17,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:31:21,512 INFO L134 CoverageAnalysis]: Checked inductivity of 20010 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20010 trivial. 0 not checked. [2021-11-19 13:31:21,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572013630] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:31:21,512 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-19 13:31:21,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [10, 10, 10, 10] total 23 [2021-11-19 13:31:21,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005555276] [2021-11-19 13:31:21,516 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:31:21,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:31:21,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:31:21,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:31:21,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-11-19 13:31:21,519 INFO L87 Difference]: Start difference. First operand 6923 states and 9916 transitions. Second operand has 7 states, 7 states have (on average 33.142857142857146) internal successors, (232), 5 states have internal predecessors, (232), 2 states have call successors, (109), 4 states have call predecessors, (109), 2 states have return successors, (105), 2 states have call predecessors, (105), 2 states have call successors, (105) [2021-11-19 13:31:23,672 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:31:24,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:31:24,687 INFO L93 Difference]: Finished difference Result 6929 states and 9921 transitions. [2021-11-19 13:31:24,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:31:24,688 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 33.142857142857146) internal successors, (232), 5 states have internal predecessors, (232), 2 states have call successors, (109), 4 states have call predecessors, (109), 2 states have return successors, (105), 2 states have call predecessors, (105), 2 states have call successors, (105) Word has length 1477 [2021-11-19 13:31:24,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:31:24,718 INFO L225 Difference]: With dead ends: 6929 [2021-11-19 13:31:24,718 INFO L226 Difference]: Without dead ends: 6927 [2021-11-19 13:31:24,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8858 GetRequests, 8835 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-11-19 13:31:24,725 INFO L933 BasicCegarLoop]: 4756 mSDtfsCounter, 2594 mSDsluCounter, 16517 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2595 SdHoareTripleChecker+Valid, 21273 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:31:24,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2595 Valid, 21273 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-11-19 13:31:24,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6927 states. [2021-11-19 13:31:25,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6927 to 6923. [2021-11-19 13:31:25,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6923 states, 4473 states have (on average 1.213056114464565) internal successors, (5426), 4671 states have internal predecessors, (5426), 2038 states have call successors, (2038), 409 states have call predecessors, (2038), 409 states have return successors, (2450), 1938 states have call predecessors, (2450), 2035 states have call successors, (2450) [2021-11-19 13:31:25,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6923 states to 6923 states and 9914 transitions. [2021-11-19 13:31:25,493 INFO L78 Accepts]: Start accepts. Automaton has 6923 states and 9914 transitions. Word has length 1477 [2021-11-19 13:31:25,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:31:25,495 INFO L470 AbstractCegarLoop]: Abstraction has 6923 states and 9914 transitions. [2021-11-19 13:31:25,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 33.142857142857146) internal successors, (232), 5 states have internal predecessors, (232), 2 states have call successors, (109), 4 states have call predecessors, (109), 2 states have return successors, (105), 2 states have call predecessors, (105), 2 states have call successors, (105) [2021-11-19 13:31:25,495 INFO L276 IsEmpty]: Start isEmpty. Operand 6923 states and 9914 transitions. [2021-11-19 13:31:25,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2548 [2021-11-19 13:31:25,551 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:31:25,553 INFO L514 BasicCegarLoop]: trace histogram [134, 134, 134, 70, 70, 68, 68, 68, 68, 68, 68, 68, 68, 66, 66, 66, 66, 66, 66, 66, 66, 20, 20, 20, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 8, 8, 8, 8, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:31:25,652 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (54)] Ended with exit code 0 [2021-11-19 13:31:25,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (55)] Forceful destruction successful, exit code 0 [2021-11-19 13:31:26,055 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-11-19 13:31:26,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:31:26,168 INFO L402 AbstractCegarLoop]: === Iteration 33 === 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)] === [2021-11-19 13:31:26,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:31:26,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1558719367, now seen corresponding path program 1 times [2021-11-19 13:31:26,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:31:26,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1762121001] [2021-11-19 13:31:26,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:31:26,174 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:31:26,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:31:26,175 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:31:26,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2021-11-19 13:31:31,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:31:31,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 6600 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 13:31:31,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:31:43,614 INFO L134 CoverageAnalysis]: Checked inductivity of 78706 backedges. 503 proven. 21 refuted. 0 times theorem prover too weak. 78182 trivial. 0 not checked. [2021-11-19 13:31:43,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:31:52,014 INFO L134 CoverageAnalysis]: Checked inductivity of 78706 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 78676 trivial. 0 not checked. [2021-11-19 13:31:52,014 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:31:52,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1762121001] [2021-11-19 13:31:52,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1762121001] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:31:52,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1767272984] [2021-11-19 13:31:52,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:31:52,015 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:31:52,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:31:52,016 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:31:52,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2021-11-19 13:31:54,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:31:54,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 6600 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:31:54,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:32:15,594 INFO L134 CoverageAnalysis]: Checked inductivity of 78706 backedges. 773 proven. 0 refuted. 0 times theorem prover too weak. 77933 trivial. 0 not checked. [2021-11-19 13:32:15,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:32:22,886 INFO L134 CoverageAnalysis]: Checked inductivity of 78706 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 78697 trivial. 0 not checked. [2021-11-19 13:32:22,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1767272984] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:32:22,887 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:32:22,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [10, 10] total 19 [2021-11-19 13:32:22,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592235941] [2021-11-19 13:32:22,890 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:32:22,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:32:22,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:32:22,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:32:22,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-11-19 13:32:22,895 INFO L87 Difference]: Start difference. First operand 6923 states and 9914 transitions. Second operand has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 3 states have call successors, (166), 3 states have call predecessors, (166), 3 states have return successors, (160), 3 states have call predecessors, (160), 3 states have call successors, (160) [2021-11-19 13:32:25,117 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:32:26,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:32:26,744 INFO L93 Difference]: Finished difference Result 17581 states and 25891 transitions. [2021-11-19 13:32:26,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:32:26,745 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 3 states have call successors, (166), 3 states have call predecessors, (166), 3 states have return successors, (160), 3 states have call predecessors, (160), 3 states have call successors, (160) Word has length 2547 [2021-11-19 13:32:26,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:32:26,818 INFO L225 Difference]: With dead ends: 17581 [2021-11-19 13:32:26,818 INFO L226 Difference]: Without dead ends: 10677 [2021-11-19 13:32:26,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10184 GetRequests, 10167 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-11-19 13:32:26,866 INFO L933 BasicCegarLoop]: 3284 mSDtfsCounter, 2424 mSDsluCounter, 2629 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 24 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2424 SdHoareTripleChecker+Valid, 5913 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-19 13:32:26,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2424 Valid, 5913 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 93 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2021-11-19 13:32:26,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10677 states. [2021-11-19 13:32:28,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10677 to 10575. [2021-11-19 13:32:28,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10575 states, 6819 states have (on average 1.2133743950725913) internal successors, (8274), 7119 states have internal predecessors, (8274), 3141 states have call successors, (3141), 609 states have call predecessors, (3141), 612 states have return successors, (3995), 2988 states have call predecessors, (3995), 3138 states have call successors, (3995) [2021-11-19 13:32:28,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10575 states to 10575 states and 15410 transitions. [2021-11-19 13:32:28,122 INFO L78 Accepts]: Start accepts. Automaton has 10575 states and 15410 transitions. Word has length 2547 [2021-11-19 13:32:28,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:32:28,125 INFO L470 AbstractCegarLoop]: Abstraction has 10575 states and 15410 transitions. [2021-11-19 13:32:28,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 3 states have call successors, (166), 3 states have call predecessors, (166), 3 states have return successors, (160), 3 states have call predecessors, (160), 3 states have call successors, (160) [2021-11-19 13:32:28,125 INFO L276 IsEmpty]: Start isEmpty. Operand 10575 states and 15410 transitions. [2021-11-19 13:32:28,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2752 [2021-11-19 13:32:28,199 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:32:28,201 INFO L514 BasicCegarLoop]: trace histogram [134, 134, 134, 70, 70, 68, 68, 68, 68, 68, 68, 68, 68, 66, 66, 66, 66, 66, 66, 66, 66, 26, 26, 26, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 10, 10, 10, 10, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:32:28,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2021-11-19 13:32:28,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (58)] Forceful destruction successful, exit code 0 [2021-11-19 13:32:28,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:32:28,602 INFO L402 AbstractCegarLoop]: === Iteration 34 === 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)] === [2021-11-19 13:32:28,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:32:28,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1037742512, now seen corresponding path program 1 times [2021-11-19 13:32:28,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:32:28,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [638248492] [2021-11-19 13:32:28,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:32:28,609 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:32:28,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:32:28,610 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:32:28,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2021-11-19 13:32:36,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:32:36,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 7286 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 13:32:37,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:32:49,402 INFO L134 CoverageAnalysis]: Checked inductivity of 79569 backedges. 808 proven. 21 refuted. 0 times theorem prover too weak. 78740 trivial. 0 not checked. [2021-11-19 13:32:49,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:32:58,496 INFO L134 CoverageAnalysis]: Checked inductivity of 79569 backedges. 24 proven. 21 refuted. 0 times theorem prover too weak. 79524 trivial. 0 not checked. [2021-11-19 13:32:58,496 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:32:58,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [638248492] [2021-11-19 13:32:58,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [638248492] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:32:58,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [672191183] [2021-11-19 13:32:58,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:32:58,497 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:32:58,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:32:58,498 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:32:58,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (60)] Waiting until timeout for monitored process [2021-11-19 13:33:06,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:06,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 7286 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 13:33:06,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:18,110 INFO L134 CoverageAnalysis]: Checked inductivity of 79569 backedges. 808 proven. 21 refuted. 0 times theorem prover too weak. 78740 trivial. 0 not checked. [2021-11-19 13:33:18,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:24,146 INFO L134 CoverageAnalysis]: Checked inductivity of 79569 backedges. 24 proven. 21 refuted. 0 times theorem prover too weak. 79524 trivial. 0 not checked. [2021-11-19 13:33:24,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [672191183] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:33:24,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308051340] [2021-11-19 13:33:24,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:24,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:33:24,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:33:24,148 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:33:24,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5948bc7f-decb-4dec-a444-420a3457ac89/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-11-19 13:33:26,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:26,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 7286 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:33:27,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:30,919 INFO L134 CoverageAnalysis]: Checked inductivity of 79569 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 79512 trivial. 0 not checked. [2021-11-19 13:33:30,919 INFO L328 TraceCheckSpWp]: Computing backward predicates...