./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/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_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/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_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/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 5afcd851c0eed3ee93d773a0172936a989a39cd6889ca2587c3b833a21bc8a3a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:28:12,175 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:28:12,179 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:28:12,250 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:28:12,252 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:28:12,253 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:28:12,255 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:28:12,258 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:28:12,259 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:28:12,260 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:28:12,262 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:28:12,263 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:28:12,264 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:28:12,266 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:28:12,267 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:28:12,269 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:28:12,271 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:28:12,272 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:28:12,275 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:28:12,278 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:28:12,281 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:28:12,283 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:28:12,285 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:28:12,286 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:28:12,290 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:28:12,291 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:28:12,292 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:28:12,293 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:28:12,294 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:28:12,295 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:28:12,296 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:28:12,297 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:28:12,298 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:28:12,299 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:28:12,301 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:28:12,301 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:28:12,302 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:28:12,303 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:28:12,303 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:28:12,305 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:28:12,306 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:28:12,307 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-19 14:28:12,337 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:28:12,338 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:28:12,339 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:28:12,339 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:28:12,340 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:28:12,340 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:28:12,341 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:28:12,341 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:28:12,341 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:28:12,342 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:28:12,342 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:28:12,343 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:28:12,343 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:28:12,344 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:28:12,344 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:28:12,345 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:28:12,346 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:28:12,346 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:28:12,347 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:28:12,347 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:28:12,347 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:28:12,348 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:28:12,348 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:28:12,349 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:28:12,349 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:28:12,350 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:28:12,350 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:28:12,350 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:28:12,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:28:12,351 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:28:12,351 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:28:12,351 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:28:12,352 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:28:12,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:28:12,352 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:28:12,353 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:28:12,353 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:28:12,353 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_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5afcd851c0eed3ee93d773a0172936a989a39cd6889ca2587c3b833a21bc8a3a [2021-11-19 14:28:12,640 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:28:12,664 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:28:12,667 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:28:12,669 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:28:12,670 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:28:12,671 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i [2021-11-19 14:28:12,738 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/data/fc8454f83/f49f369f51d343bc9786d824e174efc2/FLAGf801b9ed8 [2021-11-19 14:28:13,856 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:28:13,857 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i [2021-11-19 14:28:13,908 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/data/fc8454f83/f49f369f51d343bc9786d824e174efc2/FLAGf801b9ed8 [2021-11-19 14:28:14,119 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/data/fc8454f83/f49f369f51d343bc9786d824e174efc2 [2021-11-19 14:28:14,123 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:28:14,128 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:28:14,130 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:28:14,130 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:28:14,134 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:28:14,136 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:28:14" (1/1) ... [2021-11-19 14:28:14,139 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27eaa15b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:28:14, skipping insertion in model container [2021-11-19 14:28:14,139 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:28:14" (1/1) ... [2021-11-19 14:28:14,148 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:28:14,381 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:28:17,498 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 14:28:17,728 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 14:28:17,730 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 14:28:19,115 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_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[410165,410178] [2021-11-19 14:28:19,119 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_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[410334,410347] [2021-11-19 14:28:19,122 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_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[410501,410514] [2021-11-19 14:28:19,123 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_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[410669,410682] [2021-11-19 14:28:19,164 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:28:19,228 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 14:28:19,229 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1ce6e49b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:28:19, skipping insertion in model container [2021-11-19 14:28:19,229 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:28:19,229 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:28:19,231 INFO L158 Benchmark]: Toolchain (without parser) took 5102.61ms. Allocated memory was 100.7MB in the beginning and 184.5MB in the end (delta: 83.9MB). Free memory was 66.7MB in the beginning and 114.2MB in the end (delta: -47.4MB). Peak memory consumption was 55.4MB. Max. memory is 16.1GB. [2021-11-19 14:28:19,232 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 100.7MB. Free memory is still 78.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:28:19,233 INFO L158 Benchmark]: CACSL2BoogieTranslator took 5099.02ms. Allocated memory was 100.7MB in the beginning and 184.5MB in the end (delta: 83.9MB). Free memory was 66.7MB in the beginning and 115.2MB in the end (delta: -48.5MB). Peak memory consumption was 55.4MB. Max. memory is 16.1GB. [2021-11-19 14:28:19,235 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 100.7MB. Free memory is still 78.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 5099.02ms. Allocated memory was 100.7MB in the beginning and 184.5MB in the end (delta: 83.9MB). Free memory was 66.7MB in the beginning and 115.2MB in the end (delta: -48.5MB). Peak memory consumption was 55.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 6667]: 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_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/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_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/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_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/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 5afcd851c0eed3ee93d773a0172936a989a39cd6889ca2587c3b833a21bc8a3a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:28:21,907 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:28:21,909 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:28:21,946 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:28:21,947 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:28:21,949 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:28:21,951 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:28:21,954 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:28:21,956 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:28:21,958 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:28:21,959 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:28:21,961 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:28:21,962 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:28:21,963 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:28:21,965 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:28:21,967 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:28:21,968 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:28:21,970 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:28:21,972 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:28:21,975 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:28:21,977 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:28:21,979 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:28:21,981 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:28:21,982 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:28:21,986 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:28:21,987 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:28:21,987 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:28:21,989 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:28:21,989 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:28:21,991 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:28:21,992 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:28:21,993 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:28:21,994 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:28:21,995 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:28:21,997 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:28:21,997 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:28:21,998 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:28:21,998 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:28:21,999 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:28:22,000 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:28:22,001 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:28:22,007 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-19 14:28:22,058 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:28:22,058 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:28:22,060 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:28:22,060 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:28:22,060 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:28:22,060 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:28:22,061 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:28:22,061 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:28:22,061 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:28:22,061 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:28:22,064 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:28:22,065 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:28:22,065 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:28:22,065 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:28:22,065 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:28:22,065 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:28:22,066 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:28:22,066 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:28:22,066 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:28:22,066 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:28:22,066 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:28:22,067 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:28:22,067 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:28:22,067 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:28:22,067 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:28:22,068 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:28:22,068 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:28:22,068 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:28:22,068 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:28:22,068 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:28:22,068 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:28:22,069 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:28:22,069 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:28:22,069 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_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5afcd851c0eed3ee93d773a0172936a989a39cd6889ca2587c3b833a21bc8a3a [2021-11-19 14:28:22,475 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:28:22,507 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:28:22,511 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:28:22,512 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:28:22,513 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:28:22,515 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i [2021-11-19 14:28:22,599 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/data/6820835ec/30ffd3ba149c4fb6a1860c5b7bab6ffd/FLAGb2e55f9f7 [2021-11-19 14:28:23,913 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:28:23,914 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i [2021-11-19 14:28:23,990 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/data/6820835ec/30ffd3ba149c4fb6a1860c5b7bab6ffd/FLAGb2e55f9f7 [2021-11-19 14:28:24,120 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/data/6820835ec/30ffd3ba149c4fb6a1860c5b7bab6ffd [2021-11-19 14:28:24,124 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:28:24,126 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:28:24,130 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:28:24,130 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:28:24,138 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:28:24,139 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:28:24" (1/1) ... [2021-11-19 14:28:24,140 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71fded3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:28:24, skipping insertion in model container [2021-11-19 14:28:24,140 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:28:24" (1/1) ... [2021-11-19 14:28:24,148 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:28:24,366 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:28:29,026 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_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[410165,410178] [2021-11-19 14:28:29,030 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_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[410334,410347] [2021-11-19 14:28:29,040 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_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[410501,410514] [2021-11-19 14:28:29,041 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_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[410669,410682] [2021-11-19 14:28:29,075 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:28:29,194 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:28:29,284 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:28:29,885 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_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[410165,410178] [2021-11-19 14:28:29,886 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_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[410334,410347] [2021-11-19 14:28:29,887 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_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[410501,410514] [2021-11-19 14:28:29,887 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_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[410669,410682] [2021-11-19 14:28:29,897 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:28:29,931 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:28:30,494 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_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[410165,410178] [2021-11-19 14:28:30,495 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_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[410334,410347] [2021-11-19 14:28:30,495 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_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[410501,410514] [2021-11-19 14:28:30,496 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_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i[410669,410682] [2021-11-19 14:28:30,509 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:28:30,896 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:28:30,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:28:30 WrapperNode [2021-11-19 14:28:30,897 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:28:30,898 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:28:30,899 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:28:30,899 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:28:30,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:28:30" (1/1) ... [2021-11-19 14:28:31,100 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:28:30" (1/1) ... [2021-11-19 14:28:31,426 INFO L137 Inliner]: procedures = 555, calls = 2827, calls flagged for inlining = 282, calls inlined = 248, statements flattened = 7088 [2021-11-19 14:28:31,427 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:28:31,428 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:28:31,428 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:28:31,429 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:28:31,438 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:28:30" (1/1) ... [2021-11-19 14:28:31,439 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:28:30" (1/1) ... [2021-11-19 14:28:31,494 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:28:30" (1/1) ... [2021-11-19 14:28:31,495 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:28:30" (1/1) ... [2021-11-19 14:28:31,683 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:28:30" (1/1) ... [2021-11-19 14:28:31,726 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:28:30" (1/1) ... [2021-11-19 14:28:31,772 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:28:30" (1/1) ... [2021-11-19 14:28:31,827 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:28:31,830 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:28:31,830 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:28:31,830 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:28:31,831 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:28:30" (1/1) ... [2021-11-19 14:28:31,839 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:28:31,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:28:31,867 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:28:31,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:28:31,927 INFO L130 BoogieDeclarations]: Found specification of procedure mdio_write [2021-11-19 14:28:31,927 INFO L138 BoogieDeclarations]: Found implementation of procedure mdio_write [2021-11-19 14:28:31,927 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-19 14:28:31,927 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-19 14:28:31,928 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_alloc_skb [2021-11-19 14:28:31,928 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_alloc_skb [2021-11-19 14:28:31,928 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-19 14:28:31,928 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-19 14:28:31,929 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-19 14:28:31,929 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-19 14:28:31,929 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2021-11-19 14:28:31,929 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2021-11-19 14:28:31,929 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-19 14:28:31,930 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-19 14:28:31,930 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2021-11-19 14:28:31,930 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2021-11-19 14:28:31,930 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-11-19 14:28:31,931 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-11-19 14:28:31,931 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_63 [2021-11-19 14:28:31,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_63 [2021-11-19 14:28:31,934 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_interrupt [2021-11-19 14:28:31,934 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_interrupt [2021-11-19 14:28:31,934 INFO L130 BoogieDeclarations]: Found specification of procedure pci_name [2021-11-19 14:28:31,935 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_name [2021-11-19 14:28:31,935 INFO L130 BoogieDeclarations]: Found specification of procedure pci_get_drvdata [2021-11-19 14:28:31,935 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_get_drvdata [2021-11-19 14:28:31,936 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-19 14:28:31,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-19 14:28:31,936 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-11-19 14:28:31,937 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-11-19 14:28:31,937 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-19 14:28:31,937 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-19 14:28:31,937 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-19 14:28:31,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-19 14:28:31,937 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unmap_single [2021-11-19 14:28:31,938 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unmap_single [2021-11-19 14:28:31,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 14:28:31,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:28:31,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-19 14:28:31,938 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_dwio_write_bcr [2021-11-19 14:28:31,938 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_dwio_write_bcr [2021-11-19 14:28:31,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-19 14:28:31,939 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-19 14:28:31,939 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-19 14:28:31,939 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-11-19 14:28:31,939 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-11-19 14:28:31,940 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~C_ULONG~X~C_INT~TO~~u16~0 [2021-11-19 14:28:31,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~C_ULONG~X~C_INT~TO~~u16~0 [2021-11-19 14:28:31,941 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-19 14:28:31,941 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-19 14:28:31,941 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_netdev [2021-11-19 14:28:31,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_netdev [2021-11-19 14:28:31,942 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-19 14:28:31,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-19 14:28:31,942 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_purge_tx_ring [2021-11-19 14:28:31,942 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_purge_tx_ring [2021-11-19 14:28:31,943 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2021-11-19 14:28:31,943 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2021-11-19 14:28:31,943 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-19 14:28:31,943 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-19 14:28:31,944 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_wio_write_bcr [2021-11-19 14:28:31,944 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_wio_write_bcr [2021-11-19 14:28:31,944 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_interrupt_context [2021-11-19 14:28:31,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_interrupt_context [2021-11-19 14:28:31,944 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2021-11-19 14:28:31,945 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2021-11-19 14:28:31,945 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_err_code [2021-11-19 14:28:31,945 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_err_code [2021-11-19 14:28:31,945 INFO L130 BoogieDeclarations]: Found specification of procedure pci_free_consistent [2021-11-19 14:28:31,945 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_free_consistent [2021-11-19 14:28:31,946 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2021-11-19 14:28:31,946 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2021-11-19 14:28:31,946 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_netif_start [2021-11-19 14:28:31,946 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_netif_start [2021-11-19 14:28:31,949 INFO L130 BoogieDeclarations]: Found specification of procedure napi_enable [2021-11-19 14:28:31,950 INFO L138 BoogieDeclarations]: Found implementation of procedure napi_enable [2021-11-19 14:28:31,950 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-19 14:28:31,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-19 14:28:31,951 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 14:28:31,951 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mod_timer [2021-11-19 14:28:31,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mod_timer [2021-11-19 14:28:31,952 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_open [2021-11-19 14:28:31,953 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_open [2021-11-19 14:28:31,953 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:28:31,953 INFO L130 BoogieDeclarations]: Found specification of procedure is_valid_ether_addr [2021-11-19 14:28:31,953 INFO L138 BoogieDeclarations]: Found implementation of procedure is_valid_ether_addr [2021-11-19 14:28:31,954 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-19 14:28:31,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-19 14:28:31,954 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-19 14:28:31,954 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-19 14:28:31,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 14:28:31,955 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-19 14:28:31,955 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-19 14:28:31,955 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-19 14:28:31,955 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-19 14:28:31,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-19 14:28:31,956 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_wio_reset [2021-11-19 14:28:31,956 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_wio_reset [2021-11-19 14:28:31,956 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-19 14:28:31,956 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_lock_of_pcnet32_private [2021-11-19 14:28:31,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_lock_of_pcnet32_private [2021-11-19 14:28:31,957 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2021-11-19 14:28:31,957 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2021-11-19 14:28:31,957 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_restart [2021-11-19 14:28:31,957 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_restart [2021-11-19 14:28:31,957 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_spin_lock [2021-11-19 14:28:31,958 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_spin_lock [2021-11-19 14:28:31,958 INFO L130 BoogieDeclarations]: Found specification of procedure napi_disable [2021-11-19 14:28:31,958 INFO L138 BoogieDeclarations]: Found implementation of procedure napi_disable [2021-11-19 14:28:31,958 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-19 14:28:31,958 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-19 14:28:31,959 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2021-11-19 14:28:31,959 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2021-11-19 14:28:31,959 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2021-11-19 14:28:31,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2021-11-19 14:28:31,959 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_dwio_read_csr [2021-11-19 14:28:31,960 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_dwio_read_csr [2021-11-19 14:28:31,960 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-19 14:28:31,960 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-19 14:28:31,960 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-19 14:28:31,961 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_dwio_reset [2021-11-19 14:28:31,961 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_dwio_reset [2021-11-19 14:28:31,961 INFO L130 BoogieDeclarations]: Found specification of procedure mdio_read [2021-11-19 14:28:31,961 INFO L138 BoogieDeclarations]: Found implementation of procedure mdio_read [2021-11-19 14:28:31,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:28:31,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:28:31,962 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-19 14:28:31,962 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2021-11-19 14:28:31,962 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2021-11-19 14:28:31,962 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-19 14:28:31,963 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 14:28:31,963 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-19 14:28:31,963 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-19 14:28:31,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-19 14:28:31,963 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-19 14:28:31,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-19 14:28:31,964 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_pm_resume [2021-11-19 14:28:31,964 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_pm_resume [2021-11-19 14:28:31,964 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-19 14:28:31,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-19 14:28:31,965 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_check_media [2021-11-19 14:28:31,965 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_check_media [2021-11-19 14:28:31,965 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_get_regs_len [2021-11-19 14:28:31,965 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_get_regs_len [2021-11-19 14:28:31,966 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_size_call_parameter [2021-11-19 14:28:31,966 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_process_context [2021-11-19 14:28:31,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_process_context [2021-11-19 14:28:31,966 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_poll_controller [2021-11-19 14:28:31,966 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_poll_controller [2021-11-19 14:28:31,967 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_free_ring [2021-11-19 14:28:31,967 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_free_ring [2021-11-19 14:28:31,967 INFO L130 BoogieDeclarations]: Found specification of procedure pci_map_single [2021-11-19 14:28:31,967 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_map_single [2021-11-19 14:28:31,967 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-19 14:28:31,968 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-19 14:28:31,968 INFO L130 BoogieDeclarations]: Found specification of procedure kcalloc [2021-11-19 14:28:31,968 INFO L138 BoogieDeclarations]: Found implementation of procedure kcalloc [2021-11-19 14:28:31,968 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-19 14:28:31,968 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-19 14:28:31,969 INFO L130 BoogieDeclarations]: Found specification of procedure pci_alloc_consistent [2021-11-19 14:28:31,969 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_alloc_consistent [2021-11-19 14:28:31,969 INFO L130 BoogieDeclarations]: Found specification of procedure mii_ethtool_gset [2021-11-19 14:28:31,969 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_ethtool_gset [2021-11-19 14:28:31,969 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_purge_rx_ring [2021-11-19 14:28:31,970 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_purge_rx_ring [2021-11-19 14:28:31,970 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_dwio_write_csr [2021-11-19 14:28:31,970 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_dwio_write_csr [2021-11-19 14:28:31,970 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_tx_timeout [2021-11-19 14:28:31,970 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_tx_timeout [2021-11-19 14:28:31,971 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2021-11-19 14:28:31,971 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2021-11-19 14:28:31,971 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_netif_stop [2021-11-19 14:28:31,971 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_netif_stop [2021-11-19 14:28:31,971 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 14:28:31,972 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2021-11-19 14:28:31,972 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2021-11-19 14:28:31,972 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 14:28:31,972 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_lock_of_pcnet32_private [2021-11-19 14:28:31,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_lock_of_pcnet32_private [2021-11-19 14:28:31,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-19 14:28:31,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-19 14:28:31,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-19 14:28:31,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-19 14:28:31,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-19 14:28:31,974 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_wio_read_csr [2021-11-19 14:28:31,974 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_wio_read_csr [2021-11-19 14:28:31,974 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_set_multicast_list [2021-11-19 14:28:31,974 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_set_multicast_list [2021-11-19 14:28:31,974 INFO L130 BoogieDeclarations]: Found specification of procedure outw [2021-11-19 14:28:31,975 INFO L138 BoogieDeclarations]: Found implementation of procedure outw [2021-11-19 14:28:31,975 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-19 14:28:31,975 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-19 14:28:31,975 INFO L130 BoogieDeclarations]: Found specification of procedure mii_link_ok [2021-11-19 14:28:31,975 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_link_ok [2021-11-19 14:28:31,976 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-19 14:28:31,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-19 14:28:31,976 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_probe1 [2021-11-19 14:28:31,976 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_probe1 [2021-11-19 14:28:31,976 INFO L130 BoogieDeclarations]: Found specification of procedure outl [2021-11-19 14:28:31,976 INFO L138 BoogieDeclarations]: Found implementation of procedure outl [2021-11-19 14:28:31,977 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_irq [2021-11-19 14:28:31,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_irq [2021-11-19 14:28:31,977 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_remove_one [2021-11-19 14:28:31,977 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_remove_one [2021-11-19 14:28:31,977 INFO L130 BoogieDeclarations]: Found specification of procedure mii_ethtool_sset [2021-11-19 14:28:31,978 INFO L138 BoogieDeclarations]: Found implementation of procedure mii_ethtool_sset [2021-11-19 14:28:31,978 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_dwio_read_bcr [2021-11-19 14:28:31,978 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_dwio_read_bcr [2021-11-19 14:28:31,978 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reserve [2021-11-19 14:28:31,978 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reserve [2021-11-19 14:28:31,979 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-11-19 14:28:31,979 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-11-19 14:28:31,979 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-19 14:28:31,979 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-19 14:28:31,979 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_wio_read_bcr [2021-11-19 14:28:31,980 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_wio_read_bcr [2021-11-19 14:28:31,980 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-19 14:28:31,980 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-19 14:28:31,980 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_init_ring [2021-11-19 14:28:31,980 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_init_ring [2021-11-19 14:28:31,980 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_close [2021-11-19 14:28:31,981 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_close [2021-11-19 14:28:31,981 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2021-11-19 14:28:31,981 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2021-11-19 14:28:31,981 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-19 14:28:31,981 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-19 14:28:31,982 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_suspend [2021-11-19 14:28:31,982 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_suspend [2021-11-19 14:28:31,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-19 14:28:31,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-19 14:28:31,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-19 14:28:31,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-19 14:28:31,983 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-19 14:28:31,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-19 14:28:31,983 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2021-11-19 14:28:31,983 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2021-11-19 14:28:31,983 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_any [2021-11-19 14:28:31,984 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_any [2021-11-19 14:28:31,984 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_wio_write_csr [2021-11-19 14:28:31,984 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_wio_write_csr [2021-11-19 14:28:31,984 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_load_multicast [2021-11-19 14:28:31,984 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_load_multicast [2021-11-19 14:28:31,985 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_stop_queue [2021-11-19 14:28:31,985 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_stop_queue [2021-11-19 14:28:31,985 INFO L130 BoogieDeclarations]: Found specification of procedure pcnet32_nway_reset [2021-11-19 14:28:31,985 INFO L138 BoogieDeclarations]: Found implementation of procedure pcnet32_nway_reset [2021-11-19 14:28:31,985 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~C_ULONG~X~C_INT~X~~u16~0~TO~VOID [2021-11-19 14:28:31,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~C_ULONG~X~C_INT~X~~u16~0~TO~VOID [2021-11-19 14:28:31,986 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-19 14:28:31,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-19 14:28:31,986 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_power_state [2021-11-19 14:28:31,986 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_power_state [2021-11-19 14:28:31,987 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2021-11-19 14:28:31,987 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2021-11-19 14:28:31,987 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2021-11-19 14:28:31,987 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2021-11-19 14:28:31,987 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~C_ULONG~TO~VOID [2021-11-19 14:28:31,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~C_ULONG~TO~VOID [2021-11-19 14:28:31,988 INFO L130 BoogieDeclarations]: Found specification of procedure inl [2021-11-19 14:28:31,988 INFO L138 BoogieDeclarations]: Found implementation of procedure inl [2021-11-19 14:28:31,988 INFO L130 BoogieDeclarations]: Found specification of procedure __request_region [2021-11-19 14:28:31,988 INFO L138 BoogieDeclarations]: Found implementation of procedure __request_region [2021-11-19 14:28:31,988 INFO L130 BoogieDeclarations]: Found specification of procedure inw [2021-11-19 14:28:31,988 INFO L138 BoogieDeclarations]: Found implementation of procedure inw [2021-11-19 14:28:31,989 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-19 14:28:31,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-19 14:28:31,989 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_netdev [2021-11-19 14:28:31,989 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_netdev [2021-11-19 14:28:33,193 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:28:33,202 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:28:35,034 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-19 14:29:37,507 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:29:37,545 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:29:37,545 INFO L301 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-19 14:29:37,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:29:37 BoogieIcfgContainer [2021-11-19 14:29:37,551 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:29:37,554 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:29:37,554 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:29:37,557 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:29:37,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:28:24" (1/3) ... [2021-11-19 14:29:37,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62d9185d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:29:37, skipping insertion in model container [2021-11-19 14:29:37,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:28:30" (2/3) ... [2021-11-19 14:29:37,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62d9185d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:29:37, skipping insertion in model container [2021-11-19 14:29:37,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:29:37" (3/3) ... [2021-11-19 14:29:37,562 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_linux-kernel-locking-spinlock_drivers-net-ethernet-amd-pcnet32.cil.i [2021-11-19 14:29:37,568 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:29:37,569 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-19 14:29:37,675 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:29:37,682 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 14:29:37,682 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-19 14:29:37,757 INFO L276 IsEmpty]: Start isEmpty. Operand has 2400 states, 1634 states have (on average 1.281517747858017) internal successors, (2094), 1699 states have internal predecessors, (2094), 647 states have call successors, (647), 118 states have call predecessors, (647), 117 states have return successors, (639), 620 states have call predecessors, (639), 639 states have call successors, (639) [2021-11-19 14:29:37,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-19 14:29:37,763 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:37,764 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, 1, 1, 1, 1, 1] [2021-11-19 14:29:37,765 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 14:29:37,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:37,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1372034921, now seen corresponding path program 1 times [2021-11-19 14:29:37,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:29:37,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [157019124] [2021-11-19 14:29:37,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:37,792 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:29:37,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:29:37,797 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:29:37,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:29:39,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:39,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 1212 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:29:39,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:29:39,980 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 14:29:39,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:29:40,388 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 14:29:40,389 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:29:40,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [157019124] [2021-11-19 14:29:40,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [157019124] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:29:40,390 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:29:40,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 4 [2021-11-19 14:29:40,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391443946] [2021-11-19 14:29:40,393 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:29:40,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:29:40,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:29:40,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:29:40,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:29:40,439 INFO L87 Difference]: Start difference. First operand has 2400 states, 1634 states have (on average 1.281517747858017) internal successors, (2094), 1699 states have internal predecessors, (2094), 647 states have call successors, (647), 118 states have call predecessors, (647), 117 states have return successors, (639), 620 states have call predecessors, (639), 639 states have call successors, (639) Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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 14:29:44,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:44,054 INFO L93 Difference]: Finished difference Result 4755 states and 6828 transitions. [2021-11-19 14:29:44,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:29:44,057 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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 57 [2021-11-19 14:29:44,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:44,107 INFO L225 Difference]: With dead ends: 4755 [2021-11-19 14:29:44,107 INFO L226 Difference]: Without dead ends: 2355 [2021-11-19 14:29:44,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:29:44,146 INFO L933 BasicCegarLoop]: 3313 mSDtfsCounter, 5336 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 1282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5336 SdHoareTripleChecker+Valid, 3313 SdHoareTripleChecker+Invalid, 1283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1282 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:29:44,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5336 Valid, 3313 Invalid, 1283 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1282 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-19 14:29:44,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2355 states. [2021-11-19 14:29:44,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2355 to 2355. [2021-11-19 14:29:44,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2355 states, 1599 states have (on average 1.2645403377110693) internal successors, (2022), 1657 states have internal predecessors, (2022), 637 states have call successors, (637), 117 states have call predecessors, (637), 116 states have return successors, (634), 615 states have call predecessors, (634), 634 states have call successors, (634) [2021-11-19 14:29:44,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2355 states to 2355 states and 3293 transitions. [2021-11-19 14:29:44,499 INFO L78 Accepts]: Start accepts. Automaton has 2355 states and 3293 transitions. Word has length 57 [2021-11-19 14:29:44,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:44,500 INFO L470 AbstractCegarLoop]: Abstraction has 2355 states and 3293 transitions. [2021-11-19 14:29:44,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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 14:29:44,501 INFO L276 IsEmpty]: Start isEmpty. Operand 2355 states and 3293 transitions. [2021-11-19 14:29:44,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-19 14:29:44,514 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:44,515 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, 1, 1, 1, 1, 1] [2021-11-19 14:29:44,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:29:44,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:29:44,742 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 14:29:44,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:44,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1384592345, now seen corresponding path program 1 times [2021-11-19 14:29:44,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:29:44,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1043004644] [2021-11-19 14:29:44,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:44,746 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:29:44,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:29:44,750 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:29:44,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:29:46,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:46,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 1211 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:29:46,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:29:47,170 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 14:29:47,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:29:47,912 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 14:29:47,912 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:29:47,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1043004644] [2021-11-19 14:29:47,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1043004644] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:29:47,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:29:47,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2021-11-19 14:29:47,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966538363] [2021-11-19 14:29:47,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:29:47,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:29:47,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:29:47,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:29:47,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:29:47,918 INFO L87 Difference]: Start difference. First operand 2355 states and 3293 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-19 14:29:52,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:52,476 INFO L93 Difference]: Finished difference Result 4848 states and 6809 transitions. [2021-11-19 14:29:52,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:29:52,477 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 57 [2021-11-19 14:29:52,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:52,505 INFO L225 Difference]: With dead ends: 4848 [2021-11-19 14:29:52,506 INFO L226 Difference]: Without dead ends: 2704 [2021-11-19 14:29:52,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:29:52,519 INFO L933 BasicCegarLoop]: 3347 mSDtfsCounter, 764 mSDsluCounter, 19962 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 817 SdHoareTripleChecker+Valid, 23309 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:29:52,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [817 Valid, 23309 Invalid, 649 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [213 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-11-19 14:29:52,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2704 states. [2021-11-19 14:29:52,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2704 to 2358. [2021-11-19 14:29:52,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2358 states, 1602 states have (on average 1.2640449438202248) internal successors, (2025), 1660 states have internal predecessors, (2025), 637 states have call successors, (637), 117 states have call predecessors, (637), 116 states have return successors, (634), 615 states have call predecessors, (634), 634 states have call successors, (634) [2021-11-19 14:29:52,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2358 states to 2358 states and 3296 transitions. [2021-11-19 14:29:52,747 INFO L78 Accepts]: Start accepts. Automaton has 2358 states and 3296 transitions. Word has length 57 [2021-11-19 14:29:52,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:52,748 INFO L470 AbstractCegarLoop]: Abstraction has 2358 states and 3296 transitions. [2021-11-19 14:29:52,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-19 14:29:52,748 INFO L276 IsEmpty]: Start isEmpty. Operand 2358 states and 3296 transitions. [2021-11-19 14:29:52,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-19 14:29:52,752 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:52,753 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, 1, 1, 1, 1, 1] [2021-11-19 14:29:52,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:29:52,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:29:52,977 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 14:29:52,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:52,978 INFO L85 PathProgramCache]: Analyzing trace with hash 2066369449, now seen corresponding path program 1 times [2021-11-19 14:29:52,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:29:52,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [52129831] [2021-11-19 14:29:52,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:52,980 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:29:52,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:29:52,983 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:29:53,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:29:54,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:54,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 1210 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:29:54,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:29:55,231 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 14:29:55,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:29:55,675 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 14:29:55,675 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:29:55,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [52129831] [2021-11-19 14:29:55,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [52129831] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:29:55,676 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:29:55,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 3 [2021-11-19 14:29:55,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229243763] [2021-11-19 14:29:55,676 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:29:55,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:29:55,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:29:55,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:29:55,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:29:55,678 INFO L87 Difference]: Start difference. First operand 2358 states and 3296 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-19 14:29:57,870 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:29:58,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:58,444 INFO L93 Difference]: Finished difference Result 4505 states and 6166 transitions. [2021-11-19 14:29:58,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:29:58,446 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 57 [2021-11-19 14:29:58,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:58,495 INFO L225 Difference]: With dead ends: 4505 [2021-11-19 14:29:58,496 INFO L226 Difference]: Without dead ends: 3962 [2021-11-19 14:29:58,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 111 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 14:29:58,510 INFO L933 BasicCegarLoop]: 3947 mSDtfsCounter, 2196 mSDsluCounter, 3248 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2196 SdHoareTripleChecker+Valid, 7195 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:29:58,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2196 Valid, 7195 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-19 14:29:58,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3962 states. [2021-11-19 14:29:58,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3962 to 3928. [2021-11-19 14:29:58,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3928 states, 2658 states have (on average 1.2607223476297968) internal successors, (3351), 2753 states have internal predecessors, (3351), 1045 states have call successors, (1045), 223 states have call predecessors, (1045), 222 states have return successors, (1044), 1007 states have call predecessors, (1044), 1042 states have call successors, (1044) [2021-11-19 14:29:58,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3928 states to 3928 states and 5440 transitions. [2021-11-19 14:29:58,907 INFO L78 Accepts]: Start accepts. Automaton has 3928 states and 5440 transitions. Word has length 57 [2021-11-19 14:29:58,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:58,907 INFO L470 AbstractCegarLoop]: Abstraction has 3928 states and 5440 transitions. [2021-11-19 14:29:58,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-19 14:29:58,908 INFO L276 IsEmpty]: Start isEmpty. Operand 3928 states and 5440 transitions. [2021-11-19 14:29:58,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-19 14:29:58,910 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:58,910 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, 1, 1, 1, 1, 1] [2021-11-19 14:29:58,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:29:59,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:29:59,124 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 14:29:59,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:59,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1993982891, now seen corresponding path program 1 times [2021-11-19 14:29:59,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:29:59,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1072976043] [2021-11-19 14:29:59,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:59,127 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:29:59,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:29:59,129 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:29:59,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:30:00,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:00,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 1209 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:30:00,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:01,839 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 14:30:01,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:02,350 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 14:30:02,350 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:30:02,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1072976043] [2021-11-19 14:30:02,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1072976043] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:30:02,350 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:30:02,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 4 [2021-11-19 14:30:02,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196504444] [2021-11-19 14:30:02,351 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:30:02,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:30:02,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:30:02,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:30:02,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:30:02,353 INFO L87 Difference]: Start difference. First operand 3928 states and 5440 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-19 14:30:06,209 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:30:09,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:09,924 INFO L93 Difference]: Finished difference Result 6298 states and 8463 transitions. [2021-11-19 14:30:09,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:30:09,925 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 57 [2021-11-19 14:30:09,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:09,972 INFO L225 Difference]: With dead ends: 6298 [2021-11-19 14:30:09,972 INFO L226 Difference]: Without dead ends: 5756 [2021-11-19 14:30:09,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:30:09,981 INFO L933 BasicCegarLoop]: 4091 mSDtfsCounter, 4207 mSDsluCounter, 3627 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 858 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4207 SdHoareTripleChecker+Valid, 7718 SdHoareTripleChecker+Invalid, 1175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 858 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:30:09,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4207 Valid, 7718 Invalid, 1175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [858 Valid, 316 Invalid, 1 Unknown, 0 Unchecked, 7.0s Time] [2021-11-19 14:30:09,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5756 states. [2021-11-19 14:30:10,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5756 to 5185. [2021-11-19 14:30:10,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5185 states, 3481 states have (on average 1.2487790864694053) internal successors, (4347), 3610 states have internal predecessors, (4347), 1359 states have call successors, (1359), 343 states have call predecessors, (1359), 342 states have return successors, (1359), 1302 states have call predecessors, (1359), 1356 states have call successors, (1359) [2021-11-19 14:30:10,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5185 states to 5185 states and 7065 transitions. [2021-11-19 14:30:10,377 INFO L78 Accepts]: Start accepts. Automaton has 5185 states and 7065 transitions. Word has length 57 [2021-11-19 14:30:10,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:10,379 INFO L470 AbstractCegarLoop]: Abstraction has 5185 states and 7065 transitions. [2021-11-19 14:30:10,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-19 14:30:10,380 INFO L276 IsEmpty]: Start isEmpty. Operand 5185 states and 7065 transitions. [2021-11-19 14:30:10,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-19 14:30:10,381 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:10,381 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, 1, 1, 1, 1, 1] [2021-11-19 14:30:10,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:30:10,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:30:10,593 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 14:30:10,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:10,593 INFO L85 PathProgramCache]: Analyzing trace with hash -2026224791, now seen corresponding path program 1 times [2021-11-19 14:30:10,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:30:10,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1846748648] [2021-11-19 14:30:10,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:10,596 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:30:10,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:30:10,597 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:30:10,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:30:11,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:11,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 1209 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:30:11,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:12,827 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 14:30:12,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:13,438 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 14:30:13,438 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:30:13,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1846748648] [2021-11-19 14:30:13,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1846748648] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:30:13,438 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:30:13,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 7 [2021-11-19 14:30:13,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285956794] [2021-11-19 14:30:13,439 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:30:13,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:30:13,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:30:13,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:30:13,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:30:13,440 INFO L87 Difference]: Start difference. First operand 5185 states and 7065 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 5 states have internal predecessors, (45), 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 14:30:14,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:14,111 INFO L93 Difference]: Finished difference Result 5225 states and 7103 transitions. [2021-11-19 14:30:14,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:30:14,112 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 5 states have internal predecessors, (45), 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 57 [2021-11-19 14:30:14,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:14,158 INFO L225 Difference]: With dead ends: 5225 [2021-11-19 14:30:14,158 INFO L226 Difference]: Without dead ends: 5223 [2021-11-19 14:30:14,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:30:14,164 INFO L933 BasicCegarLoop]: 3294 mSDtfsCounter, 3236 mSDsluCounter, 6620 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3248 SdHoareTripleChecker+Valid, 9914 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:30:14,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3248 Valid, 9914 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:30:14,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5223 states. [2021-11-19 14:30:14,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5223 to 5221. [2021-11-19 14:30:14,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5221 states, 3505 states have (on average 1.2479315263908701) internal successors, (4374), 3636 states have internal predecessors, (4374), 1363 states have call successors, (1363), 351 states have call predecessors, (1363), 350 states have return successors, (1363), 1306 states have call predecessors, (1363), 1360 states have call successors, (1363) [2021-11-19 14:30:14,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5221 states to 5221 states and 7100 transitions. [2021-11-19 14:30:14,623 INFO L78 Accepts]: Start accepts. Automaton has 5221 states and 7100 transitions. Word has length 57 [2021-11-19 14:30:14,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:14,623 INFO L470 AbstractCegarLoop]: Abstraction has 5221 states and 7100 transitions. [2021-11-19 14:30:14,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 5 states have internal predecessors, (45), 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 14:30:14,624 INFO L276 IsEmpty]: Start isEmpty. Operand 5221 states and 7100 transitions. [2021-11-19 14:30:14,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-19 14:30:14,625 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:14,625 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, 1, 1, 1, 1, 1] [2021-11-19 14:30:14,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:30:14,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:30:14,845 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 14:30:14,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:14,846 INFO L85 PathProgramCache]: Analyzing trace with hash 532746433, now seen corresponding path program 1 times [2021-11-19 14:30:14,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:30:14,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [404439638] [2021-11-19 14:30:14,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:14,847 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:30:14,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:30:14,848 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:30:14,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:30:16,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:16,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 1216 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:30:16,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:17,109 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 14:30:17,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:17,760 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 14:30:17,760 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:30:17,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [404439638] [2021-11-19 14:30:17,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [404439638] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:30:17,761 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:30:17,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-19 14:30:17,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767392515] [2021-11-19 14:30:17,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:30:17,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:30:17,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:30:17,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:30:17,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:30:17,766 INFO L87 Difference]: Start difference. First operand 5221 states and 7100 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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 14:30:18,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:18,427 INFO L93 Difference]: Finished difference Result 5227 states and 7105 transitions. [2021-11-19 14:30:18,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:30:18,428 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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 62 [2021-11-19 14:30:18,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:18,481 INFO L225 Difference]: With dead ends: 5227 [2021-11-19 14:30:18,481 INFO L226 Difference]: Without dead ends: 5225 [2021-11-19 14:30:18,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:30:18,488 INFO L933 BasicCegarLoop]: 3293 mSDtfsCounter, 3255 mSDsluCounter, 6566 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3266 SdHoareTripleChecker+Valid, 9859 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 14:30:18,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3266 Valid, 9859 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:30:18,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5225 states. [2021-11-19 14:30:18,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5225 to 5225. [2021-11-19 14:30:18,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5225 states, 3508 states have (on average 1.2477194982896238) internal successors, (4377), 3639 states have internal predecessors, (4377), 1363 states have call successors, (1363), 352 states have call predecessors, (1363), 351 states have return successors, (1363), 1306 states have call predecessors, (1363), 1360 states have call successors, (1363) [2021-11-19 14:30:18,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5225 states to 5225 states and 7103 transitions. [2021-11-19 14:30:18,937 INFO L78 Accepts]: Start accepts. Automaton has 5225 states and 7103 transitions. Word has length 62 [2021-11-19 14:30:18,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:18,938 INFO L470 AbstractCegarLoop]: Abstraction has 5225 states and 7103 transitions. [2021-11-19 14:30:18,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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 14:30:18,938 INFO L276 IsEmpty]: Start isEmpty. Operand 5225 states and 7103 transitions. [2021-11-19 14:30:18,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-19 14:30:18,940 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:18,941 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, 1, 1, 1, 1, 1] [2021-11-19 14:30:18,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:30:19,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:30:19,156 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 14:30:19,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:19,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1387917865, now seen corresponding path program 1 times [2021-11-19 14:30:19,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:30:19,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1938594384] [2021-11-19 14:30:19,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:19,158 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:30:19,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:30:19,160 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:30:19,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 14:30:20,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:20,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 1223 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:30:20,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:21,755 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 14:30:21,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:22,370 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 14:30:22,371 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:30:22,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1938594384] [2021-11-19 14:30:22,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1938594384] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:30:22,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:30:22,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-19 14:30:22,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562409545] [2021-11-19 14:30:22,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:30:22,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:30:22,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:30:22,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:30:22,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:30:22,373 INFO L87 Difference]: Start difference. First operand 5225 states and 7103 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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 14:30:23,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:23,039 INFO L93 Difference]: Finished difference Result 5231 states and 7108 transitions. [2021-11-19 14:30:23,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:30:23,040 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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 67 [2021-11-19 14:30:23,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:23,091 INFO L225 Difference]: With dead ends: 5231 [2021-11-19 14:30:23,091 INFO L226 Difference]: Without dead ends: 5229 [2021-11-19 14:30:23,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:30:23,096 INFO L933 BasicCegarLoop]: 3293 mSDtfsCounter, 3255 mSDsluCounter, 6566 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3265 SdHoareTripleChecker+Valid, 9859 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 14:30:23,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3265 Valid, 9859 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:30:23,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5229 states. [2021-11-19 14:30:23,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5229 to 5229. [2021-11-19 14:30:23,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5229 states, 3511 states have (on average 1.2475078325263458) internal successors, (4380), 3642 states have internal predecessors, (4380), 1363 states have call successors, (1363), 353 states have call predecessors, (1363), 352 states have return successors, (1363), 1306 states have call predecessors, (1363), 1360 states have call successors, (1363) [2021-11-19 14:30:23,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5229 states to 5229 states and 7106 transitions. [2021-11-19 14:30:23,564 INFO L78 Accepts]: Start accepts. Automaton has 5229 states and 7106 transitions. Word has length 67 [2021-11-19 14:30:23,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:23,565 INFO L470 AbstractCegarLoop]: Abstraction has 5229 states and 7106 transitions. [2021-11-19 14:30:23,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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 14:30:23,565 INFO L276 IsEmpty]: Start isEmpty. Operand 5229 states and 7106 transitions. [2021-11-19 14:30:23,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-19 14:30:23,568 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:23,568 INFO L514 BasicCegarLoop]: trace histogram [4, 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] [2021-11-19 14:30:23,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:30:23,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:30:23,793 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 14:30:23,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:23,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1333177128, now seen corresponding path program 1 times [2021-11-19 14:30:23,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:30:23,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [225266091] [2021-11-19 14:30:23,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:23,795 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:30:23,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:30:23,796 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:30:23,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 14:30:25,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:25,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 1247 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 14:30:25,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:26,593 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 14:30:26,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:29,238 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 14:30:29,239 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:30:29,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [225266091] [2021-11-19 14:30:29,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [225266091] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:30:29,239 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:30:29,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13, 13] imperfect sequences [] total 23 [2021-11-19 14:30:29,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554196879] [2021-11-19 14:30:29,240 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:30:29,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-19 14:30:29,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:30:29,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-19 14:30:29,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-11-19 14:30:29,242 INFO L87 Difference]: Start difference. First operand 5229 states and 7106 transitions. Second operand has 23 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 8 states have call successors, (20), 2 states have call predecessors, (20), 5 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2021-11-19 14:30:35,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:35,698 INFO L93 Difference]: Finished difference Result 5645 states and 7582 transitions. [2021-11-19 14:30:35,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 14:30:35,699 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 8 states have call successors, (20), 2 states have call predecessors, (20), 5 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) Word has length 83 [2021-11-19 14:30:35,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:35,731 INFO L225 Difference]: With dead ends: 5645 [2021-11-19 14:30:35,731 INFO L226 Difference]: Without dead ends: 4611 [2021-11-19 14:30:35,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2021-11-19 14:30:35,739 INFO L933 BasicCegarLoop]: 3249 mSDtfsCounter, 34 mSDsluCounter, 48647 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 51896 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:30:35,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 51896 Invalid, 866 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [34 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2021-11-19 14:30:35,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4611 states. [2021-11-19 14:30:36,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4611 to 4606. [2021-11-19 14:30:36,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4606 states, 3114 states have (on average 1.2549775208734746) internal successors, (3908), 3222 states have internal predecessors, (3908), 1190 states have call successors, (1190), 300 states have call predecessors, (1190), 299 states have return successors, (1190), 1145 states have call predecessors, (1190), 1187 states have call successors, (1190) [2021-11-19 14:30:36,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4606 states to 4606 states and 6288 transitions. [2021-11-19 14:30:36,143 INFO L78 Accepts]: Start accepts. Automaton has 4606 states and 6288 transitions. Word has length 83 [2021-11-19 14:30:36,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:36,144 INFO L470 AbstractCegarLoop]: Abstraction has 4606 states and 6288 transitions. [2021-11-19 14:30:36,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 8 states have call successors, (20), 2 states have call predecessors, (20), 5 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2021-11-19 14:30:36,144 INFO L276 IsEmpty]: Start isEmpty. Operand 4606 states and 6288 transitions. [2021-11-19 14:30:36,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-19 14:30:36,152 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:36,152 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, 1, 1, 1, 1, 1] [2021-11-19 14:30:36,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:30:36,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:30:36,377 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 14:30:36,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:36,377 INFO L85 PathProgramCache]: Analyzing trace with hash -558184063, now seen corresponding path program 1 times [2021-11-19 14:30:36,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:30:36,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1700637389] [2021-11-19 14:30:36,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:36,378 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:30:36,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:30:36,379 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:30:36,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 14:30:37,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:37,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 1230 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:30:37,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:38,701 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 14:30:38,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:39,346 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 14:30:39,347 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:30:39,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1700637389] [2021-11-19 14:30:39,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1700637389] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:30:39,347 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:30:39,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-19 14:30:39,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129012722] [2021-11-19 14:30:39,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:30:39,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:30:39,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:30:39,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:30:39,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:30:39,349 INFO L87 Difference]: Start difference. First operand 4606 states and 6288 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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 14:30:39,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:39,989 INFO L93 Difference]: Finished difference Result 4612 states and 6293 transitions. [2021-11-19 14:30:39,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:30:39,989 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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 72 [2021-11-19 14:30:39,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:40,016 INFO L225 Difference]: With dead ends: 4612 [2021-11-19 14:30:40,016 INFO L226 Difference]: Without dead ends: 4610 [2021-11-19 14:30:40,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:30:40,021 INFO L933 BasicCegarLoop]: 3293 mSDtfsCounter, 3255 mSDsluCounter, 6566 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3264 SdHoareTripleChecker+Valid, 9859 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:30:40,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3264 Valid, 9859 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:30:40,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4610 states. [2021-11-19 14:30:40,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4610 to 4610. [2021-11-19 14:30:40,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4610 states, 3117 states have (on average 1.2547321142123837) internal successors, (3911), 3225 states have internal predecessors, (3911), 1190 states have call successors, (1190), 301 states have call predecessors, (1190), 300 states have return successors, (1190), 1145 states have call predecessors, (1190), 1187 states have call successors, (1190) [2021-11-19 14:30:40,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4610 states to 4610 states and 6291 transitions. [2021-11-19 14:30:40,440 INFO L78 Accepts]: Start accepts. Automaton has 4610 states and 6291 transitions. Word has length 72 [2021-11-19 14:30:40,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:40,442 INFO L470 AbstractCegarLoop]: Abstraction has 4610 states and 6291 transitions. [2021-11-19 14:30:40,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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 14:30:40,442 INFO L276 IsEmpty]: Start isEmpty. Operand 4610 states and 6291 transitions. [2021-11-19 14:30:40,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-19 14:30:40,444 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:40,444 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] [2021-11-19 14:30:40,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:30:40,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:30:40,661 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 14:30:40,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:40,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1257234665, now seen corresponding path program 1 times [2021-11-19 14:30:40,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:30:40,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1593390579] [2021-11-19 14:30:40,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:40,664 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:30:40,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:30:40,666 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:30:40,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 14:30:42,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:42,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 1237 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:30:42,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:43,383 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 14:30:43,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:44,114 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 14:30:44,114 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:30:44,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1593390579] [2021-11-19 14:30:44,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1593390579] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:30:44,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:30:44,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-19 14:30:44,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912413727] [2021-11-19 14:30:44,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:30:44,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:30:44,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:30:44,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:30:44,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:30:44,117 INFO L87 Difference]: Start difference. First operand 4610 states and 6291 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:30:44,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:44,703 INFO L93 Difference]: Finished difference Result 4616 states and 6296 transitions. [2021-11-19 14:30:44,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:30:44,704 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 77 [2021-11-19 14:30:44,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:44,729 INFO L225 Difference]: With dead ends: 4616 [2021-11-19 14:30:44,729 INFO L226 Difference]: Without dead ends: 4614 [2021-11-19 14:30:44,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:30:44,734 INFO L933 BasicCegarLoop]: 3293 mSDtfsCounter, 3255 mSDsluCounter, 6566 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3263 SdHoareTripleChecker+Valid, 9859 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 14:30:44,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3263 Valid, 9859 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:30:44,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4614 states. [2021-11-19 14:30:45,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4614 to 4614. [2021-11-19 14:30:45,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4614 states, 3120 states have (on average 1.2544871794871795) internal successors, (3914), 3228 states have internal predecessors, (3914), 1190 states have call successors, (1190), 302 states have call predecessors, (1190), 301 states have return successors, (1190), 1145 states have call predecessors, (1190), 1187 states have call successors, (1190) [2021-11-19 14:30:45,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4614 states to 4614 states and 6294 transitions. [2021-11-19 14:30:45,175 INFO L78 Accepts]: Start accepts. Automaton has 4614 states and 6294 transitions. Word has length 77 [2021-11-19 14:30:45,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:45,176 INFO L470 AbstractCegarLoop]: Abstraction has 4614 states and 6294 transitions. [2021-11-19 14:30:45,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:30:45,176 INFO L276 IsEmpty]: Start isEmpty. Operand 4614 states and 6294 transitions. [2021-11-19 14:30:45,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-19 14:30:45,185 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:45,185 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, 1, 1, 1, 1, 1] [2021-11-19 14:30:45,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:30:45,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:30:45,403 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 14:30:45,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:45,403 INFO L85 PathProgramCache]: Analyzing trace with hash 686178881, now seen corresponding path program 1 times [2021-11-19 14:30:45,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:30:45,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1541074053] [2021-11-19 14:30:45,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:45,405 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:30:45,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:30:45,405 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:30:45,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 14:30:46,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:46,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 1244 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:30:46,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:47,823 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 14:30:47,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:48,575 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 14:30:48,576 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:30:48,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1541074053] [2021-11-19 14:30:48,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1541074053] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:30:48,576 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:30:48,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-19 14:30:48,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103310213] [2021-11-19 14:30:48,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:30:48,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:30:48,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:30:48,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:30:48,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:30:48,578 INFO L87 Difference]: Start difference. First operand 4614 states and 6294 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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 14:30:49,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:49,211 INFO L93 Difference]: Finished difference Result 4620 states and 6299 transitions. [2021-11-19 14:30:49,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:30:49,212 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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 82 [2021-11-19 14:30:49,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:49,239 INFO L225 Difference]: With dead ends: 4620 [2021-11-19 14:30:49,239 INFO L226 Difference]: Without dead ends: 4618 [2021-11-19 14:30:49,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:30:49,243 INFO L933 BasicCegarLoop]: 3293 mSDtfsCounter, 3255 mSDsluCounter, 6566 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3262 SdHoareTripleChecker+Valid, 9859 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 14:30:49,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3262 Valid, 9859 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:30:49,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4618 states. [2021-11-19 14:30:49,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4618 to 4618. [2021-11-19 14:30:49,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4618 states, 3123 states have (on average 1.2542427153378162) internal successors, (3917), 3231 states have internal predecessors, (3917), 1190 states have call successors, (1190), 303 states have call predecessors, (1190), 302 states have return successors, (1190), 1145 states have call predecessors, (1190), 1187 states have call successors, (1190) [2021-11-19 14:30:49,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4618 states to 4618 states and 6297 transitions. [2021-11-19 14:30:49,694 INFO L78 Accepts]: Start accepts. Automaton has 4618 states and 6297 transitions. Word has length 82 [2021-11-19 14:30:49,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:49,694 INFO L470 AbstractCegarLoop]: Abstraction has 4618 states and 6297 transitions. [2021-11-19 14:30:49,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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 14:30:49,695 INFO L276 IsEmpty]: Start isEmpty. Operand 4618 states and 6297 transitions. [2021-11-19 14:30:49,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-19 14:30:49,697 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:49,697 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] [2021-11-19 14:30:49,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:30:49,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:30:49,913 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 14:30:49,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:49,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1324609623, now seen corresponding path program 1 times [2021-11-19 14:30:49,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:30:49,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [211700079] [2021-11-19 14:30:49,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:49,915 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:30:49,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:30:49,917 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:30:49,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 14:30:51,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:51,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 1251 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:30:51,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:52,506 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 14:30:52,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:53,245 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 14:30:53,245 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:30:53,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [211700079] [2021-11-19 14:30:53,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [211700079] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:30:53,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:30:53,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-19 14:30:53,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583486790] [2021-11-19 14:30:53,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:30:53,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:30:53,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:30:53,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:30:53,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:30:53,247 INFO L87 Difference]: Start difference. First operand 4618 states and 6297 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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 14:30:53,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:53,822 INFO L93 Difference]: Finished difference Result 4624 states and 6302 transitions. [2021-11-19 14:30:53,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:30:53,822 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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 87 [2021-11-19 14:30:53,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:53,844 INFO L225 Difference]: With dead ends: 4624 [2021-11-19 14:30:53,844 INFO L226 Difference]: Without dead ends: 4622 [2021-11-19 14:30:53,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:30:53,848 INFO L933 BasicCegarLoop]: 3293 mSDtfsCounter, 3255 mSDsluCounter, 6566 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3261 SdHoareTripleChecker+Valid, 9859 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 14:30:53,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3261 Valid, 9859 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:30:53,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4622 states. [2021-11-19 14:30:54,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4622 to 4622. [2021-11-19 14:30:54,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4622 states, 3126 states have (on average 1.253998720409469) internal successors, (3920), 3234 states have internal predecessors, (3920), 1190 states have call successors, (1190), 304 states have call predecessors, (1190), 303 states have return successors, (1190), 1145 states have call predecessors, (1190), 1187 states have call successors, (1190) [2021-11-19 14:30:54,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4622 states to 4622 states and 6300 transitions. [2021-11-19 14:30:54,331 INFO L78 Accepts]: Start accepts. Automaton has 4622 states and 6300 transitions. Word has length 87 [2021-11-19 14:30:54,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:54,332 INFO L470 AbstractCegarLoop]: Abstraction has 4622 states and 6300 transitions. [2021-11-19 14:30:54,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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 14:30:54,332 INFO L276 IsEmpty]: Start isEmpty. Operand 4622 states and 6300 transitions. [2021-11-19 14:30:54,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-19 14:30:54,334 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:54,334 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, 1, 1, 1, 1, 1] [2021-11-19 14:30:54,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:30:54,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:30:54,555 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 14:30:54,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:54,556 INFO L85 PathProgramCache]: Analyzing trace with hash -82609407, now seen corresponding path program 1 times [2021-11-19 14:30:54,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:30:54,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [701533279] [2021-11-19 14:30:54,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:54,558 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:30:54,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:30:54,559 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:30:54,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 14:30:56,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:56,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 1258 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:30:56,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:57,365 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 14:30:57,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:58,066 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 14:30:58,066 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:30:58,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [701533279] [2021-11-19 14:30:58,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [701533279] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:30:58,067 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:30:58,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-19 14:30:58,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105965263] [2021-11-19 14:30:58,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:30:58,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:30:58,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:30:58,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:30:58,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:30:58,068 INFO L87 Difference]: Start difference. First operand 4622 states and 6300 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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 14:30:58,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:58,724 INFO L93 Difference]: Finished difference Result 5216 states and 6982 transitions. [2021-11-19 14:30:58,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:30:58,729 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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 92 [2021-11-19 14:30:58,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:58,755 INFO L225 Difference]: With dead ends: 5216 [2021-11-19 14:30:58,755 INFO L226 Difference]: Without dead ends: 5214 [2021-11-19 14:30:58,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:30:58,759 INFO L933 BasicCegarLoop]: 3372 mSDtfsCounter, 1955 mSDsluCounter, 8374 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1960 SdHoareTripleChecker+Valid, 11746 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:30:58,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1960 Valid, 11746 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:30:58,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5214 states. [2021-11-19 14:30:59,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5214 to 5212. [2021-11-19 14:30:59,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5212 states, 3486 states have (on average 1.24469305794607) internal successors, (4339), 3610 states have internal predecessors, (4339), 1320 states have call successors, (1320), 404 states have call predecessors, (1320), 403 states have return successors, (1320), 1264 states have call predecessors, (1320), 1317 states have call successors, (1320) [2021-11-19 14:30:59,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5212 states to 5212 states and 6979 transitions. [2021-11-19 14:30:59,313 INFO L78 Accepts]: Start accepts. Automaton has 5212 states and 6979 transitions. Word has length 92 [2021-11-19 14:30:59,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:59,314 INFO L470 AbstractCegarLoop]: Abstraction has 5212 states and 6979 transitions. [2021-11-19 14:30:59,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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 14:30:59,314 INFO L276 IsEmpty]: Start isEmpty. Operand 5212 states and 6979 transitions. [2021-11-19 14:30:59,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-19 14:30:59,318 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:59,318 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, 1, 1, 1, 1, 1] [2021-11-19 14:30:59,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 14:30:59,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:30:59,533 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 14:30:59,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:59,533 INFO L85 PathProgramCache]: Analyzing trace with hash 171867753, now seen corresponding path program 1 times [2021-11-19 14:30:59,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:30:59,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [110667] [2021-11-19 14:30:59,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:59,535 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:30:59,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:30:59,537 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:30:59,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 14:31:01,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:01,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 1265 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:31:01,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:02,785 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 14:31:02,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:03,514 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 14:31:03,515 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:31:03,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [110667] [2021-11-19 14:31:03,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [110667] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:31:03,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:31:03,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-19 14:31:03,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20595365] [2021-11-19 14:31:03,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:31:03,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:31:03,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:31:03,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:31:03,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:31:03,517 INFO L87 Difference]: Start difference. First operand 5212 states and 6979 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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 14:31:04,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:31:04,273 INFO L93 Difference]: Finished difference Result 5218 states and 6984 transitions. [2021-11-19 14:31:04,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:31:04,273 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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 97 [2021-11-19 14:31:04,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:31:04,297 INFO L225 Difference]: With dead ends: 5218 [2021-11-19 14:31:04,298 INFO L226 Difference]: Without dead ends: 5216 [2021-11-19 14:31:04,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:31:04,302 INFO L933 BasicCegarLoop]: 3293 mSDtfsCounter, 3255 mSDsluCounter, 6566 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3259 SdHoareTripleChecker+Valid, 9859 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:31:04,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3259 Valid, 9859 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:31:04,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5216 states. [2021-11-19 14:31:04,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5216 to 5216. [2021-11-19 14:31:04,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5216 states, 3489 states have (on average 1.2444826597879048) internal successors, (4342), 3613 states have internal predecessors, (4342), 1320 states have call successors, (1320), 405 states have call predecessors, (1320), 404 states have return successors, (1320), 1264 states have call predecessors, (1320), 1317 states have call successors, (1320) [2021-11-19 14:31:04,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5216 states to 5216 states and 6982 transitions. [2021-11-19 14:31:04,945 INFO L78 Accepts]: Start accepts. Automaton has 5216 states and 6982 transitions. Word has length 97 [2021-11-19 14:31:04,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:31:04,945 INFO L470 AbstractCegarLoop]: Abstraction has 5216 states and 6982 transitions. [2021-11-19 14:31:04,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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 14:31:04,946 INFO L276 IsEmpty]: Start isEmpty. Operand 5216 states and 6982 transitions. [2021-11-19 14:31:04,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-19 14:31:04,949 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:31:04,949 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] [2021-11-19 14:31:04,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:31:05,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:31:05,173 INFO L402 AbstractCegarLoop]: === Iteration 15 === 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 14:31:05,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:31:05,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1911393343, now seen corresponding path program 1 times [2021-11-19 14:31:05,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:31:05,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [813507807] [2021-11-19 14:31:05,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:31:05,176 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:31:05,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:31:05,178 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:31:05,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 14:31:06,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:06,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 1272 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:31:06,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:08,362 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 14:31:08,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:09,132 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 14:31:09,133 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:31:09,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [813507807] [2021-11-19 14:31:09,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [813507807] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:31:09,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:31:09,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-19 14:31:09,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213249998] [2021-11-19 14:31:09,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:31:09,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:31:09,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:31:09,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:31:09,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:31:09,137 INFO L87 Difference]: Start difference. First operand 5216 states and 6982 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 14:31:09,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:31:09,882 INFO L93 Difference]: Finished difference Result 5222 states and 6987 transitions. [2021-11-19 14:31:09,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:31:09,883 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 102 [2021-11-19 14:31:09,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:31:09,905 INFO L225 Difference]: With dead ends: 5222 [2021-11-19 14:31:09,905 INFO L226 Difference]: Without dead ends: 5220 [2021-11-19 14:31:09,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:31:09,909 INFO L933 BasicCegarLoop]: 3293 mSDtfsCounter, 3255 mSDsluCounter, 6566 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3258 SdHoareTripleChecker+Valid, 9859 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 14:31:09,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3258 Valid, 9859 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:31:09,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5220 states. [2021-11-19 14:31:10,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5220 to 5220. [2021-11-19 14:31:10,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5220 states, 3492 states have (on average 1.2442726231386025) internal successors, (4345), 3616 states have internal predecessors, (4345), 1320 states have call successors, (1320), 406 states have call predecessors, (1320), 405 states have return successors, (1320), 1264 states have call predecessors, (1320), 1317 states have call successors, (1320) [2021-11-19 14:31:10,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5220 states to 5220 states and 6985 transitions. [2021-11-19 14:31:10,579 INFO L78 Accepts]: Start accepts. Automaton has 5220 states and 6985 transitions. Word has length 102 [2021-11-19 14:31:10,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:31:10,582 INFO L470 AbstractCegarLoop]: Abstraction has 5220 states and 6985 transitions. [2021-11-19 14:31:10,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 14:31:10,583 INFO L276 IsEmpty]: Start isEmpty. Operand 5220 states and 6985 transitions. [2021-11-19 14:31:10,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-19 14:31:10,586 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:31:10,586 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, 1, 1, 1, 1, 1] [2021-11-19 14:31:10,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 14:31:10,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:31:10,805 INFO L402 AbstractCegarLoop]: === Iteration 16 === 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 14:31:10,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:31:10,805 INFO L85 PathProgramCache]: Analyzing trace with hash 532098345, now seen corresponding path program 1 times [2021-11-19 14:31:10,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:31:10,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [35175216] [2021-11-19 14:31:10,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:31:10,807 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:31:10,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:31:10,807 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:31:10,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 14:31:12,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:12,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 1279 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:31:12,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:13,813 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 14:31:13,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:14,734 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 14:31:14,734 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:31:14,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [35175216] [2021-11-19 14:31:14,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [35175216] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:31:14,735 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:31:14,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-19 14:31:14,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702809618] [2021-11-19 14:31:14,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:31:14,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:31:14,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:31:14,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:31:14,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:31:14,737 INFO L87 Difference]: Start difference. First operand 5220 states and 6985 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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 14:31:15,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:31:15,605 INFO L93 Difference]: Finished difference Result 5226 states and 6990 transitions. [2021-11-19 14:31:15,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:31:15,606 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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 107 [2021-11-19 14:31:15,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:31:15,630 INFO L225 Difference]: With dead ends: 5226 [2021-11-19 14:31:15,630 INFO L226 Difference]: Without dead ends: 5224 [2021-11-19 14:31:15,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:31:15,636 INFO L933 BasicCegarLoop]: 3293 mSDtfsCounter, 3255 mSDsluCounter, 6566 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3257 SdHoareTripleChecker+Valid, 9859 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:31:15,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3257 Valid, 9859 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:31:15,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5224 states. [2021-11-19 14:31:16,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5224 to 5224. [2021-11-19 14:31:16,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5224 states, 3495 states have (on average 1.2440629470672389) internal successors, (4348), 3619 states have internal predecessors, (4348), 1320 states have call successors, (1320), 407 states have call predecessors, (1320), 406 states have return successors, (1320), 1264 states have call predecessors, (1320), 1317 states have call successors, (1320) [2021-11-19 14:31:16,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5224 states to 5224 states and 6988 transitions. [2021-11-19 14:31:16,336 INFO L78 Accepts]: Start accepts. Automaton has 5224 states and 6988 transitions. Word has length 107 [2021-11-19 14:31:16,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:31:16,337 INFO L470 AbstractCegarLoop]: Abstraction has 5224 states and 6988 transitions. [2021-11-19 14:31:16,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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 14:31:16,337 INFO L276 IsEmpty]: Start isEmpty. Operand 5224 states and 6988 transitions. [2021-11-19 14:31:16,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-19 14:31:16,340 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:31:16,341 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, 1, 1, 1, 1, 1] [2021-11-19 14:31:16,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 14:31:16,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:31:16,550 INFO L402 AbstractCegarLoop]: === Iteration 17 === 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 14:31:16,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:31:16,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1454582913, now seen corresponding path program 1 times [2021-11-19 14:31:16,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:31:16,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1180825690] [2021-11-19 14:31:16,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:31:16,552 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:31:16,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:31:16,554 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:31:16,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 14:31:17,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:18,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 1286 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:31:18,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:19,709 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 14:31:19,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:20,552 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 14:31:20,552 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:31:20,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1180825690] [2021-11-19 14:31:20,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1180825690] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:31:20,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:31:20,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-19 14:31:20,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738226677] [2021-11-19 14:31:20,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:31:20,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:31:20,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:31:20,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:31:20,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:31:20,555 INFO L87 Difference]: Start difference. First operand 5224 states and 6988 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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 14:31:21,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:31:21,247 INFO L93 Difference]: Finished difference Result 5230 states and 6993 transitions. [2021-11-19 14:31:21,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:31:21,247 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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 112 [2021-11-19 14:31:21,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:31:21,264 INFO L225 Difference]: With dead ends: 5230 [2021-11-19 14:31:21,264 INFO L226 Difference]: Without dead ends: 5226 [2021-11-19 14:31:21,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:31:21,267 INFO L933 BasicCegarLoop]: 3293 mSDtfsCounter, 3255 mSDsluCounter, 6566 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3256 SdHoareTripleChecker+Valid, 9859 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 14:31:21,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3256 Valid, 9859 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:31:21,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5226 states. [2021-11-19 14:31:21,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5226 to 5226. [2021-11-19 14:31:21,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5226 states, 3497 states have (on average 1.2436374034887046) internal successors, (4349), 3620 states have internal predecessors, (4349), 1320 states have call successors, (1320), 408 states have call predecessors, (1320), 406 states have return successors, (1320), 1264 states have call predecessors, (1320), 1317 states have call successors, (1320) [2021-11-19 14:31:21,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5226 states to 5226 states and 6989 transitions. [2021-11-19 14:31:21,801 INFO L78 Accepts]: Start accepts. Automaton has 5226 states and 6989 transitions. Word has length 112 [2021-11-19 14:31:21,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:31:21,802 INFO L470 AbstractCegarLoop]: Abstraction has 5226 states and 6989 transitions. [2021-11-19 14:31:21,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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 14:31:21,802 INFO L276 IsEmpty]: Start isEmpty. Operand 5226 states and 6989 transitions. [2021-11-19 14:31:21,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-19 14:31:21,805 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:31:21,805 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 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] [2021-11-19 14:31:21,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 14:31:22,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:31:22,021 INFO L402 AbstractCegarLoop]: === Iteration 18 === 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 14:31:22,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:31:22,021 INFO L85 PathProgramCache]: Analyzing trace with hash -22668311, now seen corresponding path program 1 times [2021-11-19 14:31:22,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:31:22,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [371291329] [2021-11-19 14:31:22,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:31:22,023 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:31:22,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:31:22,025 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:31:22,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 14:31:23,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:23,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 1293 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:31:23,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:24,972 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2021-11-19 14:31:24,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:25,809 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2021-11-19 14:31:25,809 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:31:25,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [371291329] [2021-11-19 14:31:25,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [371291329] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:31:25,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:31:25,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-19 14:31:25,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837970063] [2021-11-19 14:31:25,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:31:25,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:31:25,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:31:25,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:31:25,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:31:25,812 INFO L87 Difference]: Start difference. First operand 5226 states and 6989 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-19 14:31:26,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:31:26,515 INFO L93 Difference]: Finished difference Result 5226 states and 6989 transitions. [2021-11-19 14:31:26,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:31:26,516 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 117 [2021-11-19 14:31:26,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:31:26,529 INFO L225 Difference]: With dead ends: 5226 [2021-11-19 14:31:26,530 INFO L226 Difference]: Without dead ends: 5115 [2021-11-19 14:31:26,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:31:26,533 INFO L933 BasicCegarLoop]: 3291 mSDtfsCounter, 3251 mSDsluCounter, 6565 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3251 SdHoareTripleChecker+Valid, 9856 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:31:26,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3251 Valid, 9856 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:31:26,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5115 states. [2021-11-19 14:31:27,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5115 to 5115. [2021-11-19 14:31:27,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5115 states, 3426 states have (on average 1.246059544658494) internal successors, (4269), 3544 states have internal predecessors, (4269), 1296 states have call successors, (1296), 391 states have call predecessors, (1296), 391 states have return successors, (1299), 1246 states have call predecessors, (1299), 1296 states have call successors, (1299) [2021-11-19 14:31:27,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5115 states to 5115 states and 6864 transitions. [2021-11-19 14:31:27,131 INFO L78 Accepts]: Start accepts. Automaton has 5115 states and 6864 transitions. Word has length 117 [2021-11-19 14:31:27,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:31:27,132 INFO L470 AbstractCegarLoop]: Abstraction has 5115 states and 6864 transitions. [2021-11-19 14:31:27,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-19 14:31:27,132 INFO L276 IsEmpty]: Start isEmpty. Operand 5115 states and 6864 transitions. [2021-11-19 14:31:27,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-19 14:31:27,135 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:31:27,136 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] [2021-11-19 14:31:27,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 14:31:27,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:31:27,349 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 14:31:27,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:31:27,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1728033297, now seen corresponding path program 1 times [2021-11-19 14:31:27,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:31:27,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [873913601] [2021-11-19 14:31:27,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:31:27,351 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:31:27,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:31:27,352 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:31:27,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 14:31:28,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:29,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 1470 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 14:31:29,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:30,485 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 14:31:30,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:32,116 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 14:31:32,116 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:31:32,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [873913601] [2021-11-19 14:31:32,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [873913601] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:31:32,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [104331958] [2021-11-19 14:31:32,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:31:32,117 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:31:32,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:31:32,128 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:31:32,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-19 14:31:35,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:36,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 1470 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 14:31:36,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:37,697 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 14:31:37,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:38,878 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 14:31:38,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [104331958] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:31:38,879 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:31:38,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 8, 6] total 13 [2021-11-19 14:31:38,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045408826] [2021-11-19 14:31:38,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:31:38,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:31:38,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:31:38,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:31:38,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:31:38,881 INFO L87 Difference]: Start difference. First operand 5115 states and 6864 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (18), 4 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-19 14:31:39,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:31:39,917 INFO L93 Difference]: Finished difference Result 10386 states and 13965 transitions. [2021-11-19 14:31:39,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:31:39,919 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (18), 4 states have call predecessors, (18), 3 states have call successors, (18) Word has length 144 [2021-11-19 14:31:39,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:31:39,936 INFO L225 Difference]: With dead ends: 10386 [2021-11-19 14:31:39,936 INFO L226 Difference]: Without dead ends: 5294 [2021-11-19 14:31:39,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 573 GetRequests, 561 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:31:39,971 INFO L933 BasicCegarLoop]: 3320 mSDtfsCounter, 250 mSDsluCounter, 13067 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 16387 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:31:39,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 16387 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:31:39,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5294 states. [2021-11-19 14:31:40,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5294 to 5115. [2021-11-19 14:31:40,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5115 states, 3426 states have (on average 1.2457676590776416) internal successors, (4268), 3543 states have internal predecessors, (4268), 1296 states have call successors, (1296), 391 states have call predecessors, (1296), 391 states have return successors, (1299), 1246 states have call predecessors, (1299), 1296 states have call successors, (1299) [2021-11-19 14:31:40,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5115 states to 5115 states and 6863 transitions. [2021-11-19 14:31:40,527 INFO L78 Accepts]: Start accepts. Automaton has 5115 states and 6863 transitions. Word has length 144 [2021-11-19 14:31:40,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:31:40,527 INFO L470 AbstractCegarLoop]: Abstraction has 5115 states and 6863 transitions. [2021-11-19 14:31:40,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (18), 4 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-19 14:31:40,528 INFO L276 IsEmpty]: Start isEmpty. Operand 5115 states and 6863 transitions. [2021-11-19 14:31:40,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-19 14:31:40,530 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:31:40,530 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] [2021-11-19 14:31:40,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-19 14:31:40,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 14:31:40,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:31:40,947 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 14:31:40,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:31:40,948 INFO L85 PathProgramCache]: Analyzing trace with hash 767865998, now seen corresponding path program 1 times [2021-11-19 14:31:40,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:31:40,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1974848375] [2021-11-19 14:31:40,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:31:40,950 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:31:40,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:31:40,951 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:31:40,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 14:31:42,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:42,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 1481 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 14:31:42,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:44,306 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 14:31:44,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:47,201 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 14:31:47,201 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:31:47,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1974848375] [2021-11-19 14:31:47,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1974848375] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:31:47,201 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:31:47,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13, 13] imperfect sequences [] total 23 [2021-11-19 14:31:47,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544978204] [2021-11-19 14:31:47,202 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:31:47,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-19 14:31:47,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:31:47,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-19 14:31:47,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-11-19 14:31:47,204 INFO L87 Difference]: Start difference. First operand 5115 states and 6863 transitions. Second operand has 23 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 8 states have call successors, (25), 2 states have call predecessors, (25), 5 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2021-11-19 14:32:01,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:32:01,454 INFO L93 Difference]: Finished difference Result 11478 states and 15584 transitions. [2021-11-19 14:32:01,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-19 14:32:01,455 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 8 states have call successors, (25), 2 states have call predecessors, (25), 5 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 148 [2021-11-19 14:32:01,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:32:01,502 INFO L225 Difference]: With dead ends: 11478 [2021-11-19 14:32:01,502 INFO L226 Difference]: Without dead ends: 6386 [2021-11-19 14:32:01,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=305, Invalid=1501, Unknown=0, NotChecked=0, Total=1806 [2021-11-19 14:32:01,530 INFO L933 BasicCegarLoop]: 3755 mSDtfsCounter, 2250 mSDsluCounter, 53264 mSDsCounter, 0 mSdLazyCounter, 1323 mSolverCounterSat, 1117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2311 SdHoareTripleChecker+Valid, 57019 SdHoareTripleChecker+Invalid, 2440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1117 IncrementalHoareTripleChecker+Valid, 1323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:32:01,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2311 Valid, 57019 Invalid, 2440 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1117 Valid, 1323 Invalid, 0 Unknown, 0 Unchecked, 9.8s Time] [2021-11-19 14:32:01,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6386 states. [2021-11-19 14:32:02,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6386 to 5133. [2021-11-19 14:32:02,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5133 states, 3440 states have (on average 1.244767441860465) internal successors, (4282), 3555 states have internal predecessors, (4282), 1300 states have call successors, (1300), 391 states have call predecessors, (1300), 391 states have return successors, (1303), 1250 states have call predecessors, (1303), 1300 states have call successors, (1303) [2021-11-19 14:32:02,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5133 states to 5133 states and 6885 transitions. [2021-11-19 14:32:02,301 INFO L78 Accepts]: Start accepts. Automaton has 5133 states and 6885 transitions. Word has length 148 [2021-11-19 14:32:02,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:32:02,302 INFO L470 AbstractCegarLoop]: Abstraction has 5133 states and 6885 transitions. [2021-11-19 14:32:02,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 8 states have call successors, (25), 2 states have call predecessors, (25), 5 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2021-11-19 14:32:02,303 INFO L276 IsEmpty]: Start isEmpty. Operand 5133 states and 6885 transitions. [2021-11-19 14:32:02,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-11-19 14:32:02,309 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:32:02,309 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:32:02,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 14:32:02,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:32:02,534 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 14:32:02,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:32:02,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1808411766, now seen corresponding path program 1 times [2021-11-19 14:32:02,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:32:02,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [573704674] [2021-11-19 14:32:02,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:32:02,537 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:32:02,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:32:02,539 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:32:02,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 14:32:04,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:32:04,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 1697 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 14:32:04,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:32:06,138 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-11-19 14:32:06,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:32:08,065 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2021-11-19 14:32:08,066 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:32:08,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [573704674] [2021-11-19 14:32:08,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [573704674] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:32:08,066 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:32:08,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-19 14:32:08,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46676587] [2021-11-19 14:32:08,067 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:32:08,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:32:08,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:32:08,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:32:08,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:32:08,069 INFO L87 Difference]: Start difference. First operand 5133 states and 6885 transitions. Second operand has 12 states, 12 states have (on average 12.666666666666666) internal successors, (152), 8 states have internal predecessors, (152), 2 states have call successors, (52), 2 states have call predecessors, (52), 6 states have return successors, (51), 6 states have call predecessors, (51), 2 states have call successors, (51) [2021-11-19 14:32:09,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:32:09,786 INFO L93 Difference]: Finished difference Result 11036 states and 14925 transitions. [2021-11-19 14:32:09,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:32:09,787 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 12.666666666666666) internal successors, (152), 8 states have internal predecessors, (152), 2 states have call successors, (52), 2 states have call predecessors, (52), 6 states have return successors, (51), 6 states have call predecessors, (51), 2 states have call successors, (51) Word has length 231 [2021-11-19 14:32:09,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:32:09,807 INFO L225 Difference]: With dead ends: 11036 [2021-11-19 14:32:09,807 INFO L226 Difference]: Without dead ends: 5930 [2021-11-19 14:32:09,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:32:09,827 INFO L933 BasicCegarLoop]: 3649 mSDtfsCounter, 319 mSDsluCounter, 25030 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 28679 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:32:09,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [437 Valid, 28679 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:32:09,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5930 states. [2021-11-19 14:32:10,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5930 to 5147. [2021-11-19 14:32:10,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5147 states, 3450 states have (on average 1.2440579710144928) internal successors, (4292), 3565 states have internal predecessors, (4292), 1300 states have call successors, (1300), 391 states have call predecessors, (1300), 395 states have return successors, (1312), 1254 states have call predecessors, (1312), 1300 states have call successors, (1312) [2021-11-19 14:32:10,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5147 states to 5147 states and 6904 transitions. [2021-11-19 14:32:10,504 INFO L78 Accepts]: Start accepts. Automaton has 5147 states and 6904 transitions. Word has length 231 [2021-11-19 14:32:10,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:32:10,504 INFO L470 AbstractCegarLoop]: Abstraction has 5147 states and 6904 transitions. [2021-11-19 14:32:10,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.666666666666666) internal successors, (152), 8 states have internal predecessors, (152), 2 states have call successors, (52), 2 states have call predecessors, (52), 6 states have return successors, (51), 6 states have call predecessors, (51), 2 states have call successors, (51) [2021-11-19 14:32:10,505 INFO L276 IsEmpty]: Start isEmpty. Operand 5147 states and 6904 transitions. [2021-11-19 14:32:10,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2021-11-19 14:32:10,510 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:32:10,510 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:32:10,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-19 14:32:10,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:32:10,733 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 14:32:10,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:32:10,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1427956104, now seen corresponding path program 1 times [2021-11-19 14:32:10,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:32:10,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [408064333] [2021-11-19 14:32:10,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:32:10,735 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:32:10,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:32:10,736 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:32:10,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 14:32:12,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:32:12,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 1729 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:32:12,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:32:13,584 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2021-11-19 14:32:13,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:32:14,952 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2021-11-19 14:32:14,952 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:32:14,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [408064333] [2021-11-19 14:32:14,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [408064333] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:32:14,953 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:32:14,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-19 14:32:14,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472740122] [2021-11-19 14:32:14,953 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:32:14,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 14:32:14,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:32:14,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 14:32:14,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:32:14,955 INFO L87 Difference]: Start difference. First operand 5147 states and 6904 transitions. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 8 states have internal predecessors, (128), 4 states have call successors, (48), 2 states have call predecessors, (48), 4 states have return successors, (46), 6 states have call predecessors, (46), 4 states have call successors, (46) [2021-11-19 14:32:16,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:32:16,910 INFO L93 Difference]: Finished difference Result 9866 states and 13405 transitions. [2021-11-19 14:32:16,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 14:32:16,913 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 8 states have internal predecessors, (128), 4 states have call successors, (48), 2 states have call predecessors, (48), 4 states have return successors, (46), 6 states have call predecessors, (46), 4 states have call successors, (46) Word has length 247 [2021-11-19 14:32:16,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:32:16,940 INFO L225 Difference]: With dead ends: 9866 [2021-11-19 14:32:16,940 INFO L226 Difference]: Without dead ends: 4746 [2021-11-19 14:32:16,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 484 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:32:16,964 INFO L933 BasicCegarLoop]: 3787 mSDtfsCounter, 1081 mSDsluCounter, 24247 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1425 SdHoareTripleChecker+Valid, 28034 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:32:16,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1425 Valid, 28034 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 14:32:16,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4746 states. [2021-11-19 14:32:17,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4746 to 3948. [2021-11-19 14:32:17,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3948 states, 2672 states have (on average 1.25187125748503) internal successors, (3345), 2761 states have internal predecessors, (3345), 982 states have call successors, (982), 287 states have call predecessors, (982), 292 states have return successors, (999), 948 states have call predecessors, (999), 982 states have call successors, (999) [2021-11-19 14:32:17,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3948 states to 3948 states and 5326 transitions. [2021-11-19 14:32:17,537 INFO L78 Accepts]: Start accepts. Automaton has 3948 states and 5326 transitions. Word has length 247 [2021-11-19 14:32:17,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:32:17,538 INFO L470 AbstractCegarLoop]: Abstraction has 3948 states and 5326 transitions. [2021-11-19 14:32:17,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 8 states have internal predecessors, (128), 4 states have call successors, (48), 2 states have call predecessors, (48), 4 states have return successors, (46), 6 states have call predecessors, (46), 4 states have call successors, (46) [2021-11-19 14:32:17,538 INFO L276 IsEmpty]: Start isEmpty. Operand 3948 states and 5326 transitions. [2021-11-19 14:32:17,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-11-19 14:32:17,545 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:32:17,545 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:32:17,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-19 14:32:17,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:32:17,765 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 14:32:17,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:32:17,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1499552367, now seen corresponding path program 1 times [2021-11-19 14:32:17,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:32:17,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2046025031] [2021-11-19 14:32:17,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:32:17,767 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:32:17,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:32:17,768 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:32:17,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-19 14:32:19,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:32:19,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 1649 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:32:19,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:32:24,354 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-11-19 14:32:24,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:32:25,711 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-11-19 14:32:25,712 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:32:25,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2046025031] [2021-11-19 14:32:25,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2046025031] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:32:25,713 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:32:25,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 4 [2021-11-19 14:32:25,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387894285] [2021-11-19 14:32:25,713 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:32:25,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:32:25,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:32:25,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:32:25,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:32:25,715 INFO L87 Difference]: Start difference. First operand 3948 states and 5326 transitions. Second operand has 4 states, 4 states have (on average 43.5) internal successors, (174), 4 states have internal predecessors, (174), 4 states have call successors, (62), 3 states have call predecessors, (62), 3 states have return successors, (58), 4 states have call predecessors, (58), 4 states have call successors, (58) [2021-11-19 14:32:26,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:32:26,437 INFO L93 Difference]: Finished difference Result 6987 states and 9384 transitions. [2021-11-19 14:32:26,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:32:26,438 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.5) internal successors, (174), 4 states have internal predecessors, (174), 4 states have call successors, (62), 3 states have call predecessors, (62), 3 states have return successors, (58), 4 states have call predecessors, (58), 4 states have call successors, (58) Word has length 217 [2021-11-19 14:32:26,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:32:26,454 INFO L225 Difference]: With dead ends: 6987 [2021-11-19 14:32:26,454 INFO L226 Difference]: Without dead ends: 5976 [2021-11-19 14:32:26,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:32:26,459 INFO L933 BasicCegarLoop]: 4125 mSDtfsCounter, 3153 mSDsluCounter, 6418 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3153 SdHoareTripleChecker+Valid, 10543 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:32:26,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3153 Valid, 10543 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:32:26,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5976 states. [2021-11-19 14:32:27,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5976 to 5972. [2021-11-19 14:32:27,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5972 states, 4063 states have (on average 1.257937484617278) internal successors, (5111), 4191 states have internal predecessors, (5111), 1491 states have call successors, (1491), 408 states have call predecessors, (1491), 416 states have return successors, (1520), 1449 states have call predecessors, (1520), 1491 states have call successors, (1520) [2021-11-19 14:32:27,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5972 states to 5972 states and 8122 transitions. [2021-11-19 14:32:27,095 INFO L78 Accepts]: Start accepts. Automaton has 5972 states and 8122 transitions. Word has length 217 [2021-11-19 14:32:27,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:32:27,096 INFO L470 AbstractCegarLoop]: Abstraction has 5972 states and 8122 transitions. [2021-11-19 14:32:27,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.5) internal successors, (174), 4 states have internal predecessors, (174), 4 states have call successors, (62), 3 states have call predecessors, (62), 3 states have return successors, (58), 4 states have call predecessors, (58), 4 states have call successors, (58) [2021-11-19 14:32:27,097 INFO L276 IsEmpty]: Start isEmpty. Operand 5972 states and 8122 transitions. [2021-11-19 14:32:27,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2021-11-19 14:32:27,108 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:32:27,108 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 8, 8, 7, 7, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-19 14:32:27,161 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-11-19 14:32:27,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:32:27,328 INFO L402 AbstractCegarLoop]: === Iteration 24 === 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 14:32:27,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:32:27,328 INFO L85 PathProgramCache]: Analyzing trace with hash -312929530, now seen corresponding path program 1 times [2021-11-19 14:32:27,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:32:27,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [776482332] [2021-11-19 14:32:27,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:32:27,331 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:32:27,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:32:27,332 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:32:27,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-19 14:32:29,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:32:30,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 2561 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:32:30,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:32:30,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-19 14:32:33,008 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 150 proven. 3 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2021-11-19 14:32:33,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:32:35,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-19 14:32:35,929 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 502 trivial. 0 not checked. [2021-11-19 14:32:35,929 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:32:35,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [776482332] [2021-11-19 14:32:35,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [776482332] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:32:35,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [814100343] [2021-11-19 14:32:35,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:32:35,930 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:32:35,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:32:35,932 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:32:35,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-19 14:32:37,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:32:37,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 2561 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:32:37,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:32:40,293 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-19 14:32:40,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:32:41,890 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2021-11-19 14:32:41,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [814100343] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:32:41,890 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:32:41,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 12 [2021-11-19 14:32:41,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295971029] [2021-11-19 14:32:41,891 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:32:41,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:32:41,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:32:41,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:32:41,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:32:41,893 INFO L87 Difference]: Start difference. First operand 5972 states and 8122 transitions. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 2 states have call successors, (77), 2 states have call predecessors, (77), 2 states have return successors, (73), 2 states have call predecessors, (73), 2 states have call successors, (73) [2021-11-19 14:32:42,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:32:42,779 INFO L93 Difference]: Finished difference Result 13435 states and 18551 transitions. [2021-11-19 14:32:42,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:32:42,780 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 2 states have call successors, (77), 2 states have call predecessors, (77), 2 states have return successors, (73), 2 states have call predecessors, (73), 2 states have call successors, (73) Word has length 474 [2021-11-19 14:32:42,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:32:42,825 INFO L225 Difference]: With dead ends: 13435 [2021-11-19 14:32:42,825 INFO L226 Difference]: Without dead ends: 7490 [2021-11-19 14:32:42,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1892 GetRequests, 1882 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:32:42,853 INFO L933 BasicCegarLoop]: 3905 mSDtfsCounter, 662 mSDsluCounter, 3339 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 864 SdHoareTripleChecker+Valid, 7244 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:32:42,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [864 Valid, 7244 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:32:42,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7490 states. [2021-11-19 14:32:44,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7490 to 5976. [2021-11-19 14:32:44,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5976 states, 4067 states have (on average 1.2576837964101304) internal successors, (5115), 4195 states have internal predecessors, (5115), 1491 states have call successors, (1491), 408 states have call predecessors, (1491), 416 states have return successors, (1520), 1449 states have call predecessors, (1520), 1491 states have call successors, (1520) [2021-11-19 14:32:44,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5976 states to 5976 states and 8126 transitions. [2021-11-19 14:32:44,143 INFO L78 Accepts]: Start accepts. Automaton has 5976 states and 8126 transitions. Word has length 474 [2021-11-19 14:32:44,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:32:44,144 INFO L470 AbstractCegarLoop]: Abstraction has 5976 states and 8126 transitions. [2021-11-19 14:32:44,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 2 states have call successors, (77), 2 states have call predecessors, (77), 2 states have return successors, (73), 2 states have call predecessors, (73), 2 states have call successors, (73) [2021-11-19 14:32:44,145 INFO L276 IsEmpty]: Start isEmpty. Operand 5976 states and 8126 transitions. [2021-11-19 14:32:44,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2021-11-19 14:32:44,155 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:32:44,156 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-19 14:32:44,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-19 14:32:44,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-19 14:32:44,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:32:44,569 INFO L402 AbstractCegarLoop]: === Iteration 25 === 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 14:32:44,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:32:44,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1269451884, now seen corresponding path program 1 times [2021-11-19 14:32:44,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:32:44,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1528226644] [2021-11-19 14:32:44,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:32:44,573 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:32:44,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:32:44,574 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:32:44,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-19 14:32:46,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:32:47,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 2324 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:32:47,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:32:49,950 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-11-19 14:32:49,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:32:51,629 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 14:32:51,629 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:32:51,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1528226644] [2021-11-19 14:32:51,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1528226644] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:32:51,629 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:32:51,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 3 [2021-11-19 14:32:51,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097158179] [2021-11-19 14:32:51,630 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:32:51,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:32:51,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:32:51,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:32:51,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:32:51,632 INFO L87 Difference]: Start difference. First operand 5976 states and 8126 transitions. Second operand has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 3 states have call successors, (92), 3 states have call predecessors, (92), 3 states have return successors, (88), 3 states have call predecessors, (88), 3 states have call successors, (88) [2021-11-19 14:32:52,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:32:52,214 INFO L93 Difference]: Finished difference Result 10917 states and 14813 transitions. [2021-11-19 14:32:52,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:32:52,215 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 3 states have call successors, (92), 3 states have call predecessors, (92), 3 states have return successors, (88), 3 states have call predecessors, (88), 3 states have call successors, (88) Word has length 392 [2021-11-19 14:32:52,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:32:52,232 INFO L225 Difference]: With dead ends: 10917 [2021-11-19 14:32:52,233 INFO L226 Difference]: Without dead ends: 5535 [2021-11-19 14:32:52,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 782 GetRequests, 781 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 14:32:52,249 INFO L933 BasicCegarLoop]: 3218 mSDtfsCounter, 3196 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3196 SdHoareTripleChecker+Valid, 3218 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:32:52,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3196 Valid, 3218 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:32:52,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5535 states. [2021-11-19 14:32:52,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5535 to 5535. [2021-11-19 14:32:52,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5535 states, 3763 states have (on average 1.2532553813446718) internal successors, (4716), 3880 states have internal predecessors, (4716), 1389 states have call successors, (1389), 373 states have call predecessors, (1389), 381 states have return successors, (1406), 1354 states have call predecessors, (1406), 1389 states have call successors, (1406) [2021-11-19 14:32:52,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5535 states to 5535 states and 7511 transitions. [2021-11-19 14:32:52,773 INFO L78 Accepts]: Start accepts. Automaton has 5535 states and 7511 transitions. Word has length 392 [2021-11-19 14:32:52,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:32:52,773 INFO L470 AbstractCegarLoop]: Abstraction has 5535 states and 7511 transitions. [2021-11-19 14:32:52,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 3 states have call successors, (92), 3 states have call predecessors, (92), 3 states have return successors, (88), 3 states have call predecessors, (88), 3 states have call successors, (88) [2021-11-19 14:32:52,774 INFO L276 IsEmpty]: Start isEmpty. Operand 5535 states and 7511 transitions. [2021-11-19 14:32:52,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2021-11-19 14:32:52,780 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:32:52,781 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 8, 8, 7, 7, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-19 14:32:52,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-19 14:32:52,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:32:52,997 INFO L402 AbstractCegarLoop]: === Iteration 26 === 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 14:32:52,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:32:52,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1663339640, now seen corresponding path program 1 times [2021-11-19 14:32:53,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:32:53,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1098695693] [2021-11-19 14:32:53,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:32:53,002 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:32:53,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:32:53,004 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:32:53,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-19 14:32:55,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:32:56,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 2561 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:32:56,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:32:56,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-19 14:32:58,991 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 150 proven. 3 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2021-11-19 14:32:58,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:33:01,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-19 14:33:01,618 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 502 trivial. 0 not checked. [2021-11-19 14:33:01,618 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:33:01,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1098695693] [2021-11-19 14:33:01,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1098695693] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:33:01,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1896416166] [2021-11-19 14:33:01,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:33:01,619 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:33:01,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:33:01,622 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:33:01,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-19 14:33:03,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:33:03,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 2561 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:33:03,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:33:06,290 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-11-19 14:33:06,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:33:08,083 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2021-11-19 14:33:08,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1896416166] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:33:08,083 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:33:08,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 12 [2021-11-19 14:33:08,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83058822] [2021-11-19 14:33:08,084 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:33:08,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:33:08,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:33:08,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:33:08,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:33:08,091 INFO L87 Difference]: Start difference. First operand 5535 states and 7511 transitions. Second operand has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 3 states have call successors, (75), 3 states have call predecessors, (75), 3 states have return successors, (71), 3 states have call predecessors, (71), 3 states have call successors, (71) [2021-11-19 14:33:10,632 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:33:12,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:33:12,031 INFO L93 Difference]: Finished difference Result 16477 states and 22368 transitions. [2021-11-19 14:33:12,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:33:12,032 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 3 states have call successors, (75), 3 states have call predecessors, (75), 3 states have return successors, (71), 3 states have call predecessors, (71), 3 states have call successors, (71) Word has length 474 [2021-11-19 14:33:12,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:33:12,091 INFO L225 Difference]: With dead ends: 16477 [2021-11-19 14:33:12,091 INFO L226 Difference]: Without dead ends: 10964 [2021-11-19 14:33:12,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1892 GetRequests, 1882 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:33:12,126 INFO L933 BasicCegarLoop]: 4107 mSDtfsCounter, 3027 mSDsluCounter, 3166 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 35 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3027 SdHoareTripleChecker+Valid, 7273 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:33:12,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3027 Valid, 7273 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 45 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2021-11-19 14:33:12,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10964 states. [2021-11-19 14:33:13,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10964 to 10960. [2021-11-19 14:33:13,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10960 states, 7439 states have (on average 1.244790966527759) internal successors, (9260), 7671 states have internal predecessors, (9260), 2757 states have call successors, (2757), 746 states have call predecessors, (2757), 762 states have return successors, (2800), 2687 states have call predecessors, (2800), 2757 states have call successors, (2800) [2021-11-19 14:33:13,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10960 states to 10960 states and 14817 transitions. [2021-11-19 14:33:13,657 INFO L78 Accepts]: Start accepts. Automaton has 10960 states and 14817 transitions. Word has length 474 [2021-11-19 14:33:13,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:33:13,658 INFO L470 AbstractCegarLoop]: Abstraction has 10960 states and 14817 transitions. [2021-11-19 14:33:13,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 3 states have call successors, (75), 3 states have call predecessors, (75), 3 states have return successors, (71), 3 states have call predecessors, (71), 3 states have call successors, (71) [2021-11-19 14:33:13,658 INFO L276 IsEmpty]: Start isEmpty. Operand 10960 states and 14817 transitions. [2021-11-19 14:33:13,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2021-11-19 14:33:13,670 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:33:13,671 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 8, 8, 7, 7, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-19 14:33:13,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-11-19 14:33:13,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-19 14:33:14,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:33:14,080 INFO L402 AbstractCegarLoop]: === Iteration 27 === 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 14:33:14,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:33:14,081 INFO L85 PathProgramCache]: Analyzing trace with hash -2144419898, now seen corresponding path program 1 times [2021-11-19 14:33:14,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:33:14,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [43559031] [2021-11-19 14:33:14,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:33:14,086 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:33:14,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:33:14,087 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:33:14,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-19 14:33:16,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:33:17,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 2561 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:33:17,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:33:17,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-19 14:33:19,661 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 150 proven. 3 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2021-11-19 14:33:19,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:33:21,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-19 14:33:22,280 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 502 trivial. 0 not checked. [2021-11-19 14:33:22,280 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:33:22,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [43559031] [2021-11-19 14:33:22,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [43559031] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:33:22,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1082250259] [2021-11-19 14:33:22,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:33:22,281 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:33:22,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:33:22,282 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:33:22,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-19 14:33:24,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:33:24,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 2561 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:33:24,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:33:26,384 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-19 14:33:26,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:33:28,257 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2021-11-19 14:33:28,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1082250259] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:33:28,258 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:33:28,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 12 [2021-11-19 14:33:28,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242406720] [2021-11-19 14:33:28,259 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:33:28,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:33:28,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:33:28,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:33:28,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:33:28,262 INFO L87 Difference]: Start difference. First operand 10960 states and 14817 transitions. Second operand has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 3 states have call successors, (77), 3 states have call predecessors, (77), 3 states have return successors, (73), 3 states have call predecessors, (73), 3 states have call successors, (73) [2021-11-19 14:33:30,976 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:33:32,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:33:32,230 INFO L93 Difference]: Finished difference Result 16652 states and 22467 transitions. [2021-11-19 14:33:32,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:33:32,231 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 3 states have call successors, (77), 3 states have call predecessors, (77), 3 states have return successors, (73), 3 states have call predecessors, (73), 3 states have call successors, (73) Word has length 474 [2021-11-19 14:33:32,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:33:32,291 INFO L225 Difference]: With dead ends: 16652 [2021-11-19 14:33:32,292 INFO L226 Difference]: Without dead ends: 11223 [2021-11-19 14:33:32,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1892 GetRequests, 1882 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:33:32,323 INFO L933 BasicCegarLoop]: 3936 mSDtfsCounter, 3099 mSDsluCounter, 3128 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 24 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3099 SdHoareTripleChecker+Valid, 7064 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:33:32,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3099 Valid, 7064 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 46 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2021-11-19 14:33:32,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11223 states. [2021-11-19 14:33:33,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11223 to 11219. [2021-11-19 14:33:33,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11219 states, 7608 states have (on average 1.2389589905362777) internal successors, (9426), 7843 states have internal predecessors, (9426), 2818 states have call successors, (2818), 773 states have call predecessors, (2818), 791 states have return successors, (2863), 2747 states have call predecessors, (2863), 2818 states have call successors, (2863) [2021-11-19 14:33:34,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11219 states to 11219 states and 15107 transitions. [2021-11-19 14:33:34,017 INFO L78 Accepts]: Start accepts. Automaton has 11219 states and 15107 transitions. Word has length 474 [2021-11-19 14:33:34,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:33:34,018 INFO L470 AbstractCegarLoop]: Abstraction has 11219 states and 15107 transitions. [2021-11-19 14:33:34,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 3 states have call successors, (77), 3 states have call predecessors, (77), 3 states have return successors, (73), 3 states have call predecessors, (73), 3 states have call successors, (73) [2021-11-19 14:33:34,018 INFO L276 IsEmpty]: Start isEmpty. Operand 11219 states and 15107 transitions. [2021-11-19 14:33:34,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2021-11-19 14:33:34,025 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:33:34,026 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 9, 9, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-19 14:33:34,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-19 14:33:34,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-19 14:33:34,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:33:34,427 INFO L402 AbstractCegarLoop]: === Iteration 28 === 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 14:33:34,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:33:34,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1926682101, now seen corresponding path program 1 times [2021-11-19 14:33:34,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:33:34,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [828275389] [2021-11-19 14:33:34,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:33:34,430 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:33:34,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:33:34,431 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:33:34,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-19 14:33:36,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:33:36,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 2638 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:33:36,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:33:40,959 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 225 proven. 0 refuted. 0 times theorem prover too weak. 423 trivial. 0 not checked. [2021-11-19 14:33:40,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:33:43,391 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 642 trivial. 0 not checked. [2021-11-19 14:33:43,391 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:33:43,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [828275389] [2021-11-19 14:33:43,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [828275389] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:33:43,392 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:33:43,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-19 14:33:43,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083876765] [2021-11-19 14:33:43,393 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:33:43,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:33:43,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:33:43,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:33:43,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:33:43,397 INFO L87 Difference]: Start difference. First operand 11219 states and 15107 transitions. Second operand has 8 states, 8 states have (on average 42.875) internal successors, (343), 8 states have internal predecessors, (343), 4 states have call successors, (120), 3 states have call predecessors, (120), 3 states have return successors, (116), 4 states have call predecessors, (116), 4 states have call successors, (116) [2021-11-19 14:33:48,391 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:33:59,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:33:59,811 INFO L93 Difference]: Finished difference Result 26776 states and 35899 transitions. [2021-11-19 14:33:59,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:33:59,812 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 42.875) internal successors, (343), 8 states have internal predecessors, (343), 4 states have call successors, (120), 3 states have call predecessors, (120), 3 states have return successors, (116), 4 states have call predecessors, (116), 4 states have call successors, (116) Word has length 510 [2021-11-19 14:33:59,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:33:59,896 INFO L225 Difference]: With dead ends: 26776 [2021-11-19 14:33:59,897 INFO L226 Difference]: Without dead ends: 15838 [2021-11-19 14:33:59,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1021 GetRequests, 1012 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:33:59,935 INFO L933 BasicCegarLoop]: 4619 mSDtfsCounter, 5865 mSDsluCounter, 19963 mSDsCounter, 0 mSdLazyCounter, 1564 mSolverCounterSat, 495 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5944 SdHoareTripleChecker+Valid, 24582 SdHoareTripleChecker+Invalid, 2060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 495 IncrementalHoareTripleChecker+Valid, 1564 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:33:59,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5944 Valid, 24582 Invalid, 2060 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [495 Valid, 1564 Invalid, 1 Unknown, 0 Unchecked, 14.2s Time] [2021-11-19 14:33:59,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15838 states. [2021-11-19 14:34:01,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15838 to 15791. [2021-11-19 14:34:01,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15791 states, 10650 states have (on average 1.2342723004694836) internal successors, (13145), 10971 states have internal predecessors, (13145), 3928 states have call successors, (3928), 1183 states have call predecessors, (3928), 1211 states have return successors, (4008), 3820 states have call predecessors, (4008), 3928 states have call successors, (4008) [2021-11-19 14:34:01,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15791 states to 15791 states and 21081 transitions. [2021-11-19 14:34:01,706 INFO L78 Accepts]: Start accepts. Automaton has 15791 states and 21081 transitions. Word has length 510 [2021-11-19 14:34:01,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:01,707 INFO L470 AbstractCegarLoop]: Abstraction has 15791 states and 21081 transitions. [2021-11-19 14:34:01,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 42.875) internal successors, (343), 8 states have internal predecessors, (343), 4 states have call successors, (120), 3 states have call predecessors, (120), 3 states have return successors, (116), 4 states have call predecessors, (116), 4 states have call successors, (116) [2021-11-19 14:34:01,707 INFO L276 IsEmpty]: Start isEmpty. Operand 15791 states and 21081 transitions. [2021-11-19 14:34:01,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2021-11-19 14:34:01,727 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:01,728 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 8, 8, 7, 7, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-19 14:34:01,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:01,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:34:01,941 INFO L402 AbstractCegarLoop]: === Iteration 29 === 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 14:34:01,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:01,942 INFO L85 PathProgramCache]: Analyzing trace with hash 134448391, now seen corresponding path program 1 times [2021-11-19 14:34:01,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:01,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1491792770] [2021-11-19 14:34:01,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:01,944 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:01,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:01,945 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:01,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-19 14:34:04,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:04,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 2562 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:34:04,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:08,070 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2021-11-19 14:34:08,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:10,088 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2021-11-19 14:34:10,088 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:34:10,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1491792770] [2021-11-19 14:34:10,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1491792770] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:34:10,089 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:34:10,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [] total 6 [2021-11-19 14:34:10,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355816196] [2021-11-19 14:34:10,089 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:34:10,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:34:10,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:10,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:34:10,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:34:10,091 INFO L87 Difference]: Start difference. First operand 15791 states and 21081 transitions. Second operand has 6 states, 6 states have (on average 50.5) internal successors, (303), 6 states have internal predecessors, (303), 2 states have call successors, (110), 2 states have call predecessors, (110), 2 states have return successors, (106), 2 states have call predecessors, (106), 2 states have call successors, (106) [2021-11-19 14:34:14,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:34:14,249 INFO L93 Difference]: Finished difference Result 20080 states and 26763 transitions. [2021-11-19 14:34:14,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:34:14,250 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 50.5) internal successors, (303), 6 states have internal predecessors, (303), 2 states have call successors, (110), 2 states have call predecessors, (110), 2 states have return successors, (106), 2 states have call predecessors, (106), 2 states have call successors, (106) Word has length 475 [2021-11-19 14:34:14,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:34:14,282 INFO L225 Difference]: With dead ends: 20080 [2021-11-19 14:34:14,283 INFO L226 Difference]: Without dead ends: 8333 [2021-11-19 14:34:14,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 949 GetRequests, 944 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:34:14,325 INFO L933 BasicCegarLoop]: 3114 mSDtfsCounter, 5552 mSDsluCounter, 2878 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 1462 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5552 SdHoareTripleChecker+Valid, 5992 SdHoareTripleChecker+Invalid, 1542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1462 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:14,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5552 Valid, 5992 Invalid, 1542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1462 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-11-19 14:34:14,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8333 states. [2021-11-19 14:34:15,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8333 to 8315. [2021-11-19 14:34:15,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8315 states, 5560 states have (on average 1.229136690647482) internal successors, (6834), 5732 states have internal predecessors, (6834), 2062 states have call successors, (2062), 680 states have call predecessors, (2062), 691 states have return successors, (2085), 1995 states have call predecessors, (2085), 2062 states have call successors, (2085) [2021-11-19 14:34:15,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8315 states to 8315 states and 10981 transitions. [2021-11-19 14:34:15,507 INFO L78 Accepts]: Start accepts. Automaton has 8315 states and 10981 transitions. Word has length 475 [2021-11-19 14:34:15,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:15,507 INFO L470 AbstractCegarLoop]: Abstraction has 8315 states and 10981 transitions. [2021-11-19 14:34:15,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 50.5) internal successors, (303), 6 states have internal predecessors, (303), 2 states have call successors, (110), 2 states have call predecessors, (110), 2 states have return successors, (106), 2 states have call predecessors, (106), 2 states have call successors, (106) [2021-11-19 14:34:15,508 INFO L276 IsEmpty]: Start isEmpty. Operand 8315 states and 10981 transitions. [2021-11-19 14:34:15,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2021-11-19 14:34:15,513 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:15,514 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 9, 9, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-19 14:34:15,569 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2021-11-19 14:34:15,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:34:15,717 INFO L402 AbstractCegarLoop]: === Iteration 30 === 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 14:34:15,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:15,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1934147046, now seen corresponding path program 1 times [2021-11-19 14:34:15,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:15,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [411934617] [2021-11-19 14:34:15,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:15,721 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:15,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:15,723 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:15,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-19 14:34:18,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:18,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 2639 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:34:18,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:19,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-19 14:34:21,393 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 190 proven. 3 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2021-11-19 14:34:21,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:23,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-19 14:34:24,274 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 645 trivial. 0 not checked. [2021-11-19 14:34:24,275 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:34:24,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [411934617] [2021-11-19 14:34:24,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [411934617] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:34:24,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1783386044] [2021-11-19 14:34:24,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:24,276 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:34:24,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:34:24,281 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:34:24,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-19 14:34:26,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:26,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 2639 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:34:26,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:27,921 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 196 proven. 0 refuted. 0 times theorem prover too weak. 452 trivial. 0 not checked. [2021-11-19 14:34:27,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:29,177 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2021-11-19 14:34:29,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1783386044] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:34:29,178 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:34:29,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 12 [2021-11-19 14:34:29,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657260120] [2021-11-19 14:34:29,179 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:34:29,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:34:29,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:29,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:34:29,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:34:29,180 INFO L87 Difference]: Start difference. First operand 8315 states and 10981 transitions. Second operand has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 2 states have call successors, (77), 2 states have call predecessors, (77), 2 states have return successors, (73), 2 states have call predecessors, (73), 2 states have call successors, (73) [2021-11-19 14:34:30,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:34:30,008 INFO L93 Difference]: Finished difference Result 15962 states and 21112 transitions. [2021-11-19 14:34:30,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:34:30,011 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 2 states have call successors, (77), 2 states have call predecessors, (77), 2 states have return successors, (73), 2 states have call predecessors, (73), 2 states have call successors, (73) Word has length 511 [2021-11-19 14:34:30,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:34:30,035 INFO L225 Difference]: With dead ends: 15962 [2021-11-19 14:34:30,035 INFO L226 Difference]: Without dead ends: 8317 [2021-11-19 14:34:30,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2040 GetRequests, 2030 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:34:30,056 INFO L933 BasicCegarLoop]: 3193 mSDtfsCounter, 0 mSDsluCounter, 3188 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6381 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:30,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 6381 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:34:30,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8317 states. [2021-11-19 14:34:31,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8317 to 8317. [2021-11-19 14:34:31,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8317 states, 5562 states have (on average 1.229054297015462) internal successors, (6836), 5734 states have internal predecessors, (6836), 2062 states have call successors, (2062), 680 states have call predecessors, (2062), 691 states have return successors, (2085), 1995 states have call predecessors, (2085), 2062 states have call successors, (2085) [2021-11-19 14:34:31,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8317 states to 8317 states and 10983 transitions. [2021-11-19 14:34:31,073 INFO L78 Accepts]: Start accepts. Automaton has 8317 states and 10983 transitions. Word has length 511 [2021-11-19 14:34:31,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:31,074 INFO L470 AbstractCegarLoop]: Abstraction has 8317 states and 10983 transitions. [2021-11-19 14:34:31,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 2 states have call successors, (77), 2 states have call predecessors, (77), 2 states have return successors, (73), 2 states have call predecessors, (73), 2 states have call successors, (73) [2021-11-19 14:34:31,074 INFO L276 IsEmpty]: Start isEmpty. Operand 8317 states and 10983 transitions. [2021-11-19 14:34:31,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2021-11-19 14:34:31,079 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:31,079 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 9, 9, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-19 14:34:31,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:31,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:31,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:34:31,480 INFO L402 AbstractCegarLoop]: === Iteration 31 === 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 14:34:31,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:31,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1379865436, now seen corresponding path program 1 times [2021-11-19 14:34:31,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:31,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [608365782] [2021-11-19 14:34:31,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:31,483 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:31,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:31,484 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:31,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-19 14:34:33,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:34,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 2636 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:34:34,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:34,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-19 14:34:36,796 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 190 proven. 3 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2021-11-19 14:34:36,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:39,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-19 14:34:39,551 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 645 trivial. 0 not checked. [2021-11-19 14:34:39,552 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:34:39,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [608365782] [2021-11-19 14:34:39,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [608365782] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:34:39,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1069298723] [2021-11-19 14:34:39,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:39,552 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:34:39,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:34:39,553 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:34:39,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-11-19 14:34:41,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:41,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 2636 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:34:41,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:41,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-19 14:34:43,737 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 190 proven. 3 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2021-11-19 14:34:43,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:45,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-19 14:34:45,912 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 645 trivial. 0 not checked. [2021-11-19 14:34:45,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1069298723] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:34:45,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809638711] [2021-11-19 14:34:45,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:45,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:34:45,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:34:45,913 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:34:45,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-19 14:34:47,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:47,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 2636 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:34:47,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:47,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-19 14:34:49,846 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 190 proven. 3 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2021-11-19 14:34:49,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:51,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-19 14:34:52,122 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 645 trivial. 0 not checked. [2021-11-19 14:34:52,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809638711] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:34:52,123 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:34:52,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 11 [2021-11-19 14:34:52,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87820604] [2021-11-19 14:34:52,124 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:34:52,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:34:52,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:52,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:34:52,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:34:52,127 INFO L87 Difference]: Start difference. First operand 8317 states and 10983 transitions. Second operand has 11 states, 7 states have (on average 39.857142857142854) internal successors, (279), 9 states have internal predecessors, (279), 9 states have call successors, (87), 2 states have call predecessors, (87), 5 states have return successors, (83), 7 states have call predecessors, (83), 9 states have call successors, (83) [2021-11-19 14:34:57,271 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:35:00,749 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:35:03,917 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:35:07,074 WARN L515 Checker$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 14:35:09,691 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:35:11,201 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:35:14,725 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:35:17,886 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:35:21,478 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:35:24,810 WARN L515 Checker$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 14:35:27,781 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:35:30,617 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:35:32,631 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:35:35,844 WARN L515 Checker$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 14:35:38,201 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:35:40,867 WARN L515 Checker$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 14:35:45,261 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:35:48,159 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:35:52,626 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:35:54,701 WARN L515 Checker$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 14:35:56,864 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:35:59,418 WARN L515 Checker$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 14:36:02,159 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:36:02,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:36:02,704 INFO L93 Difference]: Finished difference Result 17101 states and 23096 transitions. [2021-11-19 14:36:02,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:36:02,708 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 39.857142857142854) internal successors, (279), 9 states have internal predecessors, (279), 9 states have call successors, (87), 2 states have call predecessors, (87), 5 states have return successors, (83), 7 states have call predecessors, (83), 9 states have call successors, (83) Word has length 511 [2021-11-19 14:36:02,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:36:02,737 INFO L225 Difference]: With dead ends: 17101 [2021-11-19 14:36:02,737 INFO L226 Difference]: Without dead ends: 8808 [2021-11-19 14:36:02,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3062 GetRequests, 3049 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:36:02,758 INFO L933 BasicCegarLoop]: 3212 mSDtfsCounter, 255 mSDsluCounter, 21234 mSDsCounter, 0 mSdLazyCounter, 1948 mSolverCounterSat, 50 mSolverCounterUnsat, 20 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 67.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 24446 SdHoareTripleChecker+Invalid, 2600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1948 IncrementalHoareTripleChecker+Invalid, 20 IncrementalHoareTripleChecker+Unknown, 582 IncrementalHoareTripleChecker+Unchecked, 68.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:36:02,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 24446 Invalid, 2600 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [50 Valid, 1948 Invalid, 20 Unknown, 582 Unchecked, 68.9s Time] [2021-11-19 14:36:02,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8808 states. [2021-11-19 14:36:03,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8808 to 8361. [2021-11-19 14:36:03,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8361 states, 5594 states have (on average 1.228459063282088) internal successors, (6872), 5766 states have internal predecessors, (6872), 2070 states have call successors, (2070), 684 states have call predecessors, (2070), 695 states have return successors, (2131), 2003 states have call predecessors, (2131), 2070 states have call successors, (2131) [2021-11-19 14:36:03,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8361 states to 8361 states and 11073 transitions. [2021-11-19 14:36:03,749 INFO L78 Accepts]: Start accepts. Automaton has 8361 states and 11073 transitions. Word has length 511 [2021-11-19 14:36:03,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:36:03,750 INFO L470 AbstractCegarLoop]: Abstraction has 8361 states and 11073 transitions. [2021-11-19 14:36:03,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 39.857142857142854) internal successors, (279), 9 states have internal predecessors, (279), 9 states have call successors, (87), 2 states have call predecessors, (87), 5 states have return successors, (83), 7 states have call predecessors, (83), 9 states have call successors, (83) [2021-11-19 14:36:03,750 INFO L276 IsEmpty]: Start isEmpty. Operand 8361 states and 11073 transitions. [2021-11-19 14:36:03,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2021-11-19 14:36:03,756 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:36:03,757 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 7, 7, 7, 7, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-19 14:36:03,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-19 14:36:04,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-19 14:36:04,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2021-11-19 14:36:04,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:36:04,362 INFO L402 AbstractCegarLoop]: === Iteration 32 === 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 14:36:04,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:36:04,363 INFO L85 PathProgramCache]: Analyzing trace with hash -7471589, now seen corresponding path program 1 times [2021-11-19 14:36:04,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:36:04,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1176664173] [2021-11-19 14:36:04,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:36:04,365 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:36:04,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:36:04,367 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:36:04,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-19 14:36:06,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:36:07,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 2559 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 14:36:07,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:36:07,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-11-19 14:36:07,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-19 14:36:10,155 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 132 proven. 3 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-19 14:36:10,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:36:13,506 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2021-11-19 14:36:13,506 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:36:13,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1176664173] [2021-11-19 14:36:13,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1176664173] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:36:13,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1541343817] [2021-11-19 14:36:13,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:36:13,507 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:36:13,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:36:13,509 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:36:13,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2021-11-19 14:36:15,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:36:15,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 2559 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:36:15,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:36:17,911 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2021-11-19 14:36:17,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:36:19,734 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 502 trivial. 0 not checked. [2021-11-19 14:36:19,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1541343817] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:36:19,735 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:36:19,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [7, 7] total 11 [2021-11-19 14:36:19,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037244621] [2021-11-19 14:36:19,735 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:36:19,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:36:19,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:36:19,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:36:19,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:36:19,737 INFO L87 Difference]: Start difference. First operand 8361 states and 11073 transitions. Second operand has 4 states, 4 states have (on average 61.75) internal successors, (247), 4 states have internal predecessors, (247), 3 states have call successors, (71), 2 states have call predecessors, (71), 2 states have return successors, (67), 3 states have call predecessors, (67), 3 states have call successors, (67) [2021-11-19 14:36:21,920 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:36:23,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:36:23,028 INFO L93 Difference]: Finished difference Result 17670 states and 23753 transitions. [2021-11-19 14:36:23,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:36:23,031 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 61.75) internal successors, (247), 4 states have internal predecessors, (247), 3 states have call successors, (71), 2 states have call predecessors, (71), 2 states have return successors, (67), 3 states have call predecessors, (67), 3 states have call successors, (67) Word has length 476 [2021-11-19 14:36:23,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:36:23,063 INFO L225 Difference]: With dead ends: 17670 [2021-11-19 14:36:23,063 INFO L226 Difference]: Without dead ends: 10001 [2021-11-19 14:36:23,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1901 GetRequests, 1891 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:36:23,087 INFO L933 BasicCegarLoop]: 3696 mSDtfsCounter, 684 mSDsluCounter, 6938 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 889 SdHoareTripleChecker+Valid, 10634 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:36:23,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [889 Valid, 10634 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-19 14:36:23,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10001 states. [2021-11-19 14:36:23,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10001 to 8654. [2021-11-19 14:36:23,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8654 states, 5817 states have (on average 1.2332817603575725) internal successors, (7174), 5989 states have internal predecessors, (7174), 2140 states have call successors, (2140), 684 states have call predecessors, (2140), 695 states have return successors, (2231), 2073 states have call predecessors, (2231), 2140 states have call successors, (2231) [2021-11-19 14:36:23,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8654 states to 8654 states and 11545 transitions. [2021-11-19 14:36:24,000 INFO L78 Accepts]: Start accepts. Automaton has 8654 states and 11545 transitions. Word has length 476 [2021-11-19 14:36:24,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:36:24,001 INFO L470 AbstractCegarLoop]: Abstraction has 8654 states and 11545 transitions. [2021-11-19 14:36:24,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 61.75) internal successors, (247), 4 states have internal predecessors, (247), 3 states have call successors, (71), 2 states have call predecessors, (71), 2 states have return successors, (67), 3 states have call predecessors, (67), 3 states have call successors, (67) [2021-11-19 14:36:24,001 INFO L276 IsEmpty]: Start isEmpty. Operand 8654 states and 11545 transitions. [2021-11-19 14:36:24,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2021-11-19 14:36:24,008 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:36:24,008 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 7, 7, 7, 7, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-19 14:36:24,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-11-19 14:36:24,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2021-11-19 14:36:24,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:36:24,409 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 14:36:24,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:36:24,410 INFO L85 PathProgramCache]: Analyzing trace with hash 664826551, now seen corresponding path program 1 times [2021-11-19 14:36:24,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:36:24,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1910225381] [2021-11-19 14:36:24,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:36:24,412 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:36:24,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:36:24,413 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:36:24,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-19 14:36:26,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:36:26,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 2562 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 14:36:26,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:36:27,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-11-19 14:36:27,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-19 14:36:30,026 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 132 proven. 3 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-19 14:36:30,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:36:33,178 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2021-11-19 14:36:33,178 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:36:33,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1910225381] [2021-11-19 14:36:33,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1910225381] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:36:33,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1824755676] [2021-11-19 14:36:33,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:36:33,179 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:36:33,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:36:33,180 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:36:33,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2021-11-19 14:36:34,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:36:35,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 2562 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:36:35,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:36:37,673 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2021-11-19 14:36:37,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:36:39,392 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2021-11-19 14:36:39,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1824755676] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:36:39,392 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:36:39,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [7, 7] total 13 [2021-11-19 14:36:39,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857988431] [2021-11-19 14:36:39,393 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:36:39,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:36:39,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:36:39,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:36:39,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:36:39,396 INFO L87 Difference]: Start difference. First operand 8654 states and 11545 transitions. Second operand has 6 states, 6 states have (on average 42.0) internal successors, (252), 5 states have internal predecessors, (252), 2 states have call successors, (73), 2 states have call predecessors, (73), 3 states have return successors, (69), 3 states have call predecessors, (69), 2 states have call successors, (69) [2021-11-19 14:36:40,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:36:40,893 INFO L93 Difference]: Finished difference Result 18619 states and 25176 transitions. [2021-11-19 14:36:40,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:36:40,894 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 42.0) internal successors, (252), 5 states have internal predecessors, (252), 2 states have call successors, (73), 2 states have call predecessors, (73), 3 states have return successors, (69), 3 states have call predecessors, (69), 2 states have call successors, (69) Word has length 478 [2021-11-19 14:36:40,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:36:40,931 INFO L225 Difference]: With dead ends: 18619 [2021-11-19 14:36:40,931 INFO L226 Difference]: Without dead ends: 10262 [2021-11-19 14:36:40,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1909 GetRequests, 1897 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:36:40,956 INFO L933 BasicCegarLoop]: 3393 mSDtfsCounter, 641 mSDsluCounter, 13366 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 839 SdHoareTripleChecker+Valid, 16759 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:36:40,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [839 Valid, 16759 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:36:40,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10262 states. [2021-11-19 14:36:41,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10262 to 8675. [2021-11-19 14:36:41,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8675 states, 5835 states have (on average 1.2325621251071122) internal successors, (7192), 6004 states have internal predecessors, (7192), 2140 states have call successors, (2140), 684 states have call predecessors, (2140), 698 states have return successors, (2249), 2079 states have call predecessors, (2249), 2140 states have call successors, (2249) [2021-11-19 14:36:41,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8675 states to 8675 states and 11581 transitions. [2021-11-19 14:36:41,971 INFO L78 Accepts]: Start accepts. Automaton has 8675 states and 11581 transitions. Word has length 478 [2021-11-19 14:36:41,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:36:41,972 INFO L470 AbstractCegarLoop]: Abstraction has 8675 states and 11581 transitions. [2021-11-19 14:36:41,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 42.0) internal successors, (252), 5 states have internal predecessors, (252), 2 states have call successors, (73), 2 states have call predecessors, (73), 3 states have return successors, (69), 3 states have call predecessors, (69), 2 states have call successors, (69) [2021-11-19 14:36:41,972 INFO L276 IsEmpty]: Start isEmpty. Operand 8675 states and 11581 transitions. [2021-11-19 14:36:41,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 518 [2021-11-19 14:36:41,981 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:36:41,982 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 9, 9, 7, 7, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-19 14:36:42,008 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (43)] Ended with exit code 0 [2021-11-19 14:36:42,262 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (42)] Ended with exit code 0 [2021-11-19 14:36:42,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:36:42,398 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 14:36:42,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:36:42,400 INFO L85 PathProgramCache]: Analyzing trace with hash 437241818, now seen corresponding path program 1 times [2021-11-19 14:36:42,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:36:42,403 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1786754379] [2021-11-19 14:36:42,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:36:42,403 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:36:42,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:36:42,405 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:36:42,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-19 14:36:45,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:36:45,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 2648 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 14:36:45,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:36:46,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-11-19 14:36:46,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-19 14:36:48,611 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 172 proven. 3 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2021-11-19 14:36:48,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:36:51,850 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 642 trivial. 0 not checked. [2021-11-19 14:36:51,850 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:36:51,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1786754379] [2021-11-19 14:36:51,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1786754379] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:36:51,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [190832908] [2021-11-19 14:36:51,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:36:51,850 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:36:51,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:36:51,851 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:36:51,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2021-11-19 14:36:53,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:36:53,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 2648 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:36:53,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:36:55,923 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2021-11-19 14:36:55,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:36:57,591 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 641 trivial. 0 not checked. [2021-11-19 14:36:57,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [190832908] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:36:57,592 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:36:57,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 10 [2021-11-19 14:36:57,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877907452] [2021-11-19 14:36:57,592 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:36:57,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:36:57,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:36:57,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:36:57,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:36:57,594 INFO L87 Difference]: Start difference. First operand 8675 states and 11581 transitions. Second operand has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 2 states have call successors, (77), 2 states have call predecessors, (77), 2 states have return successors, (73), 2 states have call predecessors, (73), 2 states have call successors, (73) [2021-11-19 14:36:58,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:36:58,470 INFO L93 Difference]: Finished difference Result 17081 states and 22884 transitions. [2021-11-19 14:36:58,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:36:58,471 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 2 states have call successors, (77), 2 states have call predecessors, (77), 2 states have return successors, (73), 2 states have call predecessors, (73), 2 states have call successors, (73) Word has length 517 [2021-11-19 14:36:58,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:36:58,502 INFO L225 Difference]: With dead ends: 17081 [2021-11-19 14:36:58,502 INFO L226 Difference]: Without dead ends: 8703 [2021-11-19 14:36:58,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2064 GetRequests, 2056 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:36:58,528 INFO L933 BasicCegarLoop]: 3193 mSDtfsCounter, 3 mSDsluCounter, 3189 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6382 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:36:58,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6382 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:36:58,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8703 states. [2021-11-19 14:36:59,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8703 to 8682. [2021-11-19 14:36:59,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8682 states, 5842 states have (on average 1.2322834645669292) internal successors, (7199), 6011 states have internal predecessors, (7199), 2140 states have call successors, (2140), 684 states have call predecessors, (2140), 698 states have return successors, (2249), 2079 states have call predecessors, (2249), 2140 states have call successors, (2249) [2021-11-19 14:36:59,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8682 states to 8682 states and 11588 transitions. [2021-11-19 14:36:59,469 INFO L78 Accepts]: Start accepts. Automaton has 8682 states and 11588 transitions. Word has length 517 [2021-11-19 14:36:59,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:36:59,470 INFO L470 AbstractCegarLoop]: Abstraction has 8682 states and 11588 transitions. [2021-11-19 14:36:59,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 2 states have call successors, (77), 2 states have call predecessors, (77), 2 states have return successors, (73), 2 states have call predecessors, (73), 2 states have call successors, (73) [2021-11-19 14:36:59,470 INFO L276 IsEmpty]: Start isEmpty. Operand 8682 states and 11588 transitions. [2021-11-19 14:36:59,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2021-11-19 14:36:59,477 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:36:59,477 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 9, 9, 7, 7, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-19 14:36:59,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-11-19 14:36:59,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (45)] Forceful destruction successful, exit code 0 [2021-11-19 14:36:59,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:36:59,878 INFO L402 AbstractCegarLoop]: === Iteration 35 === 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 14:36:59,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:36:59,878 INFO L85 PathProgramCache]: Analyzing trace with hash 650467386, now seen corresponding path program 1 times [2021-11-19 14:36:59,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:36:59,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1655476864] [2021-11-19 14:36:59,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:36:59,881 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:36:59,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:36:59,882 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:36:59,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-11-19 14:37:02,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:37:02,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 2643 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 14:37:02,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:37:03,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-11-19 14:37:03,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-19 14:37:06,214 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 172 proven. 3 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2021-11-19 14:37:06,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:37:09,547 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 642 trivial. 0 not checked. [2021-11-19 14:37:09,547 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:37:09,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1655476864] [2021-11-19 14:37:09,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1655476864] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:37:09,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1282680272] [2021-11-19 14:37:09,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:37:09,547 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:37:09,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:37:09,548 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:37:09,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2021-11-19 14:37:11,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:37:11,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 2643 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:37:11,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:37:13,785 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 151 proven. 0 refuted. 0 times theorem prover too weak. 494 trivial. 0 not checked. [2021-11-19 14:37:13,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:37:15,401 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 642 trivial. 0 not checked. [2021-11-19 14:37:15,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1282680272] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:37:15,402 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:37:15,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 10 [2021-11-19 14:37:15,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824404277] [2021-11-19 14:37:15,403 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:37:15,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:37:15,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:37:15,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:37:15,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:37:15,405 INFO L87 Difference]: Start difference. First operand 8682 states and 11588 transitions. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 2 states have call successors, (77), 2 states have call predecessors, (77), 2 states have return successors, (73), 2 states have call predecessors, (73), 2 states have call successors, (73) [2021-11-19 14:37:16,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:37:16,474 INFO L93 Difference]: Finished difference Result 17095 states and 22880 transitions. [2021-11-19 14:37:16,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:37:16,475 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 2 states have call successors, (77), 2 states have call predecessors, (77), 2 states have return successors, (73), 2 states have call predecessors, (73), 2 states have call successors, (73) Word has length 515 [2021-11-19 14:37:16,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:37:16,507 INFO L225 Difference]: With dead ends: 17095 [2021-11-19 14:37:16,507 INFO L226 Difference]: Without dead ends: 8710 [2021-11-19 14:37:16,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2056 GetRequests, 2048 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:37:16,535 INFO L933 BasicCegarLoop]: 3199 mSDtfsCounter, 3 mSDsluCounter, 3193 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6392 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:37:16,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6392 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:37:16,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8710 states. [2021-11-19 14:37:17,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8710 to 8689. [2021-11-19 14:37:17,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8689 states, 5849 states have (on average 1.2320054710206874) internal successors, (7206), 6018 states have internal predecessors, (7206), 2140 states have call successors, (2140), 684 states have call predecessors, (2140), 698 states have return successors, (2249), 2079 states have call predecessors, (2249), 2140 states have call successors, (2249) [2021-11-19 14:37:17,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8689 states to 8689 states and 11595 transitions. [2021-11-19 14:37:17,642 INFO L78 Accepts]: Start accepts. Automaton has 8689 states and 11595 transitions. Word has length 515 [2021-11-19 14:37:17,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:37:17,643 INFO L470 AbstractCegarLoop]: Abstraction has 8689 states and 11595 transitions. [2021-11-19 14:37:17,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 2 states have call successors, (77), 2 states have call predecessors, (77), 2 states have return successors, (73), 2 states have call predecessors, (73), 2 states have call successors, (73) [2021-11-19 14:37:17,643 INFO L276 IsEmpty]: Start isEmpty. Operand 8689 states and 11595 transitions. [2021-11-19 14:37:17,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2021-11-19 14:37:17,650 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:37:17,650 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 7, 7, 7, 7, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-19 14:37:17,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (47)] Forceful destruction successful, exit code 0 [2021-11-19 14:37:17,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-11-19 14:37:18,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:37:18,052 INFO L402 AbstractCegarLoop]: === Iteration 36 === 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 14:37:18,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:37:18,052 INFO L85 PathProgramCache]: Analyzing trace with hash -212500261, now seen corresponding path program 1 times [2021-11-19 14:37:18,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:37:18,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1377436646] [2021-11-19 14:37:18,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:37:18,055 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:37:18,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:37:18,057 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:37:18,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-11-19 14:37:20,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:37:20,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 2557 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 14:37:20,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:37:21,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-11-19 14:37:21,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-19 14:37:23,717 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 132 proven. 3 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-19 14:37:23,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:37:26,800 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2021-11-19 14:37:26,801 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:37:26,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1377436646] [2021-11-19 14:37:26,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1377436646] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:37:26,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1693029685] [2021-11-19 14:37:26,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:37:26,801 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:37:26,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:37:26,802 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:37:26,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2021-11-19 14:37:28,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:37:28,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 2557 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:37:28,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:37:30,573 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2021-11-19 14:37:30,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:37:32,063 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 502 trivial. 0 not checked. [2021-11-19 14:37:32,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1693029685] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:37:32,064 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:37:32,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 11 [2021-11-19 14:37:32,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26140129] [2021-11-19 14:37:32,065 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:37:32,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:37:32,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:37:32,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:37:32,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:37:32,067 INFO L87 Difference]: Start difference. First operand 8689 states and 11595 transitions. Second operand has 4 states, 4 states have (on average 62.25) internal successors, (249), 4 states have internal predecessors, (249), 2 states have call successors, (73), 2 states have call predecessors, (73), 2 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) [2021-11-19 14:37:35,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:37:35,540 INFO L93 Difference]: Finished difference Result 20213 states and 27602 transitions. [2021-11-19 14:37:35,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:37:35,541 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 62.25) internal successors, (249), 4 states have internal predecessors, (249), 2 states have call successors, (73), 2 states have call predecessors, (73), 2 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) Word has length 476 [2021-11-19 14:37:35,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:37:35,593 INFO L225 Difference]: With dead ends: 20213 [2021-11-19 14:37:35,593 INFO L226 Difference]: Without dead ends: 11821 [2021-11-19 14:37:35,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1900 GetRequests, 1891 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:37:35,619 INFO L933 BasicCegarLoop]: 3592 mSDtfsCounter, 1273 mSDsluCounter, 7014 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1669 SdHoareTripleChecker+Valid, 10606 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:37:35,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1669 Valid, 10606 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-19 14:37:35,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11821 states. [2021-11-19 14:37:36,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11821 to 8695. [2021-11-19 14:37:36,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8695 states, 5855 states have (on average 1.2317677198975234) internal successors, (7212), 6024 states have internal predecessors, (7212), 2140 states have call successors, (2140), 684 states have call predecessors, (2140), 698 states have return successors, (2249), 2079 states have call predecessors, (2249), 2140 states have call successors, (2249) [2021-11-19 14:37:36,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8695 states to 8695 states and 11601 transitions. [2021-11-19 14:37:36,898 INFO L78 Accepts]: Start accepts. Automaton has 8695 states and 11601 transitions. Word has length 476 [2021-11-19 14:37:36,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:37:36,898 INFO L470 AbstractCegarLoop]: Abstraction has 8695 states and 11601 transitions. [2021-11-19 14:37:36,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.25) internal successors, (249), 4 states have internal predecessors, (249), 2 states have call successors, (73), 2 states have call predecessors, (73), 2 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) [2021-11-19 14:37:36,899 INFO L276 IsEmpty]: Start isEmpty. Operand 8695 states and 11601 transitions. [2021-11-19 14:37:36,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2021-11-19 14:37:36,905 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:37:36,906 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 7, 7, 7, 7, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-19 14:37:36,926 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (49)] Ended with exit code 0 [2021-11-19 14:37:37,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (48)] Ended with exit code 0 [2021-11-19 14:37:37,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:37:37,307 INFO L402 AbstractCegarLoop]: === Iteration 37 === 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 14:37:37,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:37:37,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1664905791, now seen corresponding path program 1 times [2021-11-19 14:37:37,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:37:37,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1702719347] [2021-11-19 14:37:37,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:37:37,311 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:37:37,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:37:37,312 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:37:37,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-11-19 14:37:40,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:37:40,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 2571 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 14:37:40,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:37:41,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-11-19 14:37:41,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-19 14:37:43,700 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 132 proven. 3 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-11-19 14:37:43,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:37:47,177 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2021-11-19 14:37:47,177 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:37:47,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1702719347] [2021-11-19 14:37:47,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1702719347] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:37:47,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [836917470] [2021-11-19 14:37:47,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:37:47,179 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:37:47,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:37:47,183 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:37:47,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2021-11-19 14:37:49,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:37:49,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 2571 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:37:49,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:37:51,218 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-11-19 14:37:51,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:37:52,822 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 502 trivial. 0 not checked. [2021-11-19 14:37:52,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [836917470] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:37:52,822 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:37:52,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [7, 7] total 13 [2021-11-19 14:37:52,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632452232] [2021-11-19 14:37:52,823 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:37:52,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:37:52,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:37:52,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:37:52,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:37:52,825 INFO L87 Difference]: Start difference. First operand 8695 states and 11601 transitions. Second operand has 6 states, 6 states have (on average 39.0) internal successors, (234), 6 states have internal predecessors, (234), 2 states have call successors, (66), 2 states have call predecessors, (66), 2 states have return successors, (62), 2 states have call predecessors, (62), 2 states have call successors, (62) [2021-11-19 14:37:54,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:37:54,131 INFO L93 Difference]: Finished difference Result 16618 states and 22172 transitions. [2021-11-19 14:37:54,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:37:54,132 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 39.0) internal successors, (234), 6 states have internal predecessors, (234), 2 states have call successors, (66), 2 states have call predecessors, (66), 2 states have return successors, (62), 2 states have call predecessors, (62), 2 states have call successors, (62) Word has length 481 [2021-11-19 14:37:54,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:37:54,157 INFO L225 Difference]: With dead ends: 16618 [2021-11-19 14:37:54,157 INFO L226 Difference]: Without dead ends: 8733 [2021-11-19 14:37:54,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1921 GetRequests, 1909 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:37:54,175 INFO L933 BasicCegarLoop]: 3210 mSDtfsCounter, 29 mSDsluCounter, 9590 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 12800 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:37:54,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 12800 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:37:54,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8733 states. [2021-11-19 14:37:54,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8733 to 8699. [2021-11-19 14:37:54,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8699 states, 5859 states have (on average 1.2316094896740057) internal successors, (7216), 6028 states have internal predecessors, (7216), 2140 states have call successors, (2140), 684 states have call predecessors, (2140), 698 states have return successors, (2249), 2079 states have call predecessors, (2249), 2140 states have call successors, (2249) [2021-11-19 14:37:54,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8699 states to 8699 states and 11605 transitions. [2021-11-19 14:37:54,994 INFO L78 Accepts]: Start accepts. Automaton has 8699 states and 11605 transitions. Word has length 481 [2021-11-19 14:37:54,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:37:54,995 INFO L470 AbstractCegarLoop]: Abstraction has 8699 states and 11605 transitions. [2021-11-19 14:37:54,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 39.0) internal successors, (234), 6 states have internal predecessors, (234), 2 states have call successors, (66), 2 states have call predecessors, (66), 2 states have return successors, (62), 2 states have call predecessors, (62), 2 states have call successors, (62) [2021-11-19 14:37:54,995 INFO L276 IsEmpty]: Start isEmpty. Operand 8699 states and 11605 transitions. [2021-11-19 14:37:55,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 539 [2021-11-19 14:37:55,002 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:37:55,003 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:37:55,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2021-11-19 14:37:55,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (51)] Forceful destruction successful, exit code 0 [2021-11-19 14:37:55,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:37:55,404 INFO L402 AbstractCegarLoop]: === Iteration 38 === 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 14:37:55,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:37:55,405 INFO L85 PathProgramCache]: Analyzing trace with hash -998033946, now seen corresponding path program 1 times [2021-11-19 14:37:55,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:37:55,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [606910852] [2021-11-19 14:37:55,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:37:55,408 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:37:55,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:37:55,408 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:37:55,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2021-11-19 14:37:58,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:37:58,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 2811 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 14:37:58,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:37:59,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-11-19 14:37:59,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-19 14:38:02,702 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 132 proven. 3 refuted. 0 times theorem prover too weak. 445 trivial. 0 not checked. [2021-11-19 14:38:02,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:38:06,048 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 577 trivial. 0 not checked. [2021-11-19 14:38:06,048 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:38:06,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [606910852] [2021-11-19 14:38:06,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [606910852] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:38:06,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1516639762] [2021-11-19 14:38:06,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:38:06,049 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:38:06,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:38:06,050 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:38:06,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2021-11-19 14:38:08,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:38:08,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 2811 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:38:08,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:38:11,724 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked. [2021-11-19 14:38:11,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:38:14,200 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 580 trivial. 0 not checked. [2021-11-19 14:38:14,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1516639762] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:38:14,200 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:38:14,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [7, 7] total 15 [2021-11-19 14:38:14,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418482323] [2021-11-19 14:38:14,201 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:38:14,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:38:14,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:38:14,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:38:14,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:38:14,204 INFO L87 Difference]: Start difference. First operand 8699 states and 11605 transitions. Second operand has 8 states, 8 states have (on average 35.625) internal successors, (285), 8 states have internal predecessors, (285), 2 states have call successors, (85), 2 states have call predecessors, (85), 2 states have return successors, (81), 2 states have call predecessors, (81), 2 states have call successors, (81) [2021-11-19 14:38:17,544 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 14:38:18,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:38:18,510 INFO L93 Difference]: Finished difference Result 17153 states and 22901 transitions. [2021-11-19 14:38:18,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:38:18,514 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 35.625) internal successors, (285), 8 states have internal predecessors, (285), 2 states have call successors, (85), 2 states have call predecessors, (85), 2 states have return successors, (81), 2 states have call predecessors, (81), 2 states have call successors, (81) Word has length 538 [2021-11-19 14:38:18,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:38:18,549 INFO L225 Difference]: With dead ends: 17153 [2021-11-19 14:38:18,549 INFO L226 Difference]: Without dead ends: 8751 [2021-11-19 14:38:18,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2150 GetRequests, 2135 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-11-19 14:38:18,578 INFO L933 BasicCegarLoop]: 3197 mSDtfsCounter, 19 mSDsluCounter, 15929 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 19126 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:38:18,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 19126 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 62 Invalid, 1 Unknown, 0 Unchecked, 3.0s Time] [2021-11-19 14:38:18,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8751 states. [2021-11-19 14:38:19,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8751 to 8711. [2021-11-19 14:38:19,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8711 states, 5871 states have (on average 1.2311360926588315) internal successors, (7228), 6040 states have internal predecessors, (7228), 2140 states have call successors, (2140), 684 states have call predecessors, (2140), 698 states have return successors, (2249), 2079 states have call predecessors, (2249), 2140 states have call successors, (2249) [2021-11-19 14:38:19,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8711 states to 8711 states and 11617 transitions. [2021-11-19 14:38:19,726 INFO L78 Accepts]: Start accepts. Automaton has 8711 states and 11617 transitions. Word has length 538 [2021-11-19 14:38:19,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:38:19,726 INFO L470 AbstractCegarLoop]: Abstraction has 8711 states and 11617 transitions. [2021-11-19 14:38:19,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 35.625) internal successors, (285), 8 states have internal predecessors, (285), 2 states have call successors, (85), 2 states have call predecessors, (85), 2 states have return successors, (81), 2 states have call predecessors, (81), 2 states have call successors, (81) [2021-11-19 14:38:19,727 INFO L276 IsEmpty]: Start isEmpty. Operand 8711 states and 11617 transitions. [2021-11-19 14:38:19,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 560 [2021-11-19 14:38:19,734 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:38:19,735 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 7, 7, 7, 7, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:38:19,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (53)] Forceful destruction successful, exit code 0 [2021-11-19 14:38:20,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2021-11-19 14:38:20,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:38:20,139 INFO L402 AbstractCegarLoop]: === Iteration 39 === 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 14:38:20,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:38:20,140 INFO L85 PathProgramCache]: Analyzing trace with hash 485980831, now seen corresponding path program 1 times [2021-11-19 14:38:20,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:38:20,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1253943474] [2021-11-19 14:38:20,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:38:20,143 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:38:20,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:38:20,144 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:38:20,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-11-19 14:38:23,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:38:24,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 2858 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 14:38:24,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:38:24,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-11-19 14:38:24,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-19 14:38:27,962 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 240 proven. 3 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2021-11-19 14:38:27,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:38:31,303 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 705 trivial. 0 not checked. [2021-11-19 14:38:31,303 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:38:31,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1253943474] [2021-11-19 14:38:31,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1253943474] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:38:31,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1546239437] [2021-11-19 14:38:31,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:38:31,304 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:38:31,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:38:31,305 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:38:31,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2021-11-19 14:38:38,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:38:38,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 2858 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:38:38,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:38:40,848 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 572 trivial. 0 not checked. [2021-11-19 14:38:40,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:38:42,799 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 708 trivial. 0 not checked. [2021-11-19 14:38:42,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1546239437] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:38:42,799 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:38:42,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 11 [2021-11-19 14:38:42,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668804494] [2021-11-19 14:38:42,800 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:38:42,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:38:42,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:38:42,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:38:42,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:38:42,802 INFO L87 Difference]: Start difference. First operand 8711 states and 11617 transitions. Second operand has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 2 states have call successors, (86), 2 states have call predecessors, (86), 2 states have return successors, (82), 2 states have call predecessors, (82), 2 states have call successors, (82) [2021-11-19 14:38:45,694 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 14:38:49,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:38:49,191 INFO L93 Difference]: Finished difference Result 17236 states and 23043 transitions. [2021-11-19 14:38:49,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:38:49,214 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 2 states have call successors, (86), 2 states have call predecessors, (86), 2 states have return successors, (82), 2 states have call predecessors, (82), 2 states have call successors, (82) Word has length 559 [2021-11-19 14:38:49,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:38:49,262 INFO L225 Difference]: With dead ends: 17236 [2021-11-19 14:38:49,262 INFO L226 Difference]: Without dead ends: 8825 [2021-11-19 14:38:49,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2232 GetRequests, 2223 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:38:49,299 INFO L933 BasicCegarLoop]: 3192 mSDtfsCounter, 26 mSDsluCounter, 6303 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 16 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 9495 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:38:49,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 9495 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 84 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2021-11-19 14:38:49,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8825 states. [2021-11-19 14:38:50,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8825 to 8807. [2021-11-19 14:38:50,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8807 states, 5947 states have (on average 1.2295274928535396) internal successors, (7312), 6116 states have internal predecessors, (7312), 2160 states have call successors, (2160), 684 states have call predecessors, (2160), 698 states have return successors, (2275), 2099 states have call predecessors, (2275), 2160 states have call successors, (2275) [2021-11-19 14:38:50,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8807 states to 8807 states and 11747 transitions. [2021-11-19 14:38:50,497 INFO L78 Accepts]: Start accepts. Automaton has 8807 states and 11747 transitions. Word has length 559 [2021-11-19 14:38:50,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:38:50,497 INFO L470 AbstractCegarLoop]: Abstraction has 8807 states and 11747 transitions. [2021-11-19 14:38:50,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 2 states have call successors, (86), 2 states have call predecessors, (86), 2 states have return successors, (82), 2 states have call predecessors, (82), 2 states have call successors, (82) [2021-11-19 14:38:50,498 INFO L276 IsEmpty]: Start isEmpty. Operand 8807 states and 11747 transitions. [2021-11-19 14:38:50,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 656 [2021-11-19 14:38:50,507 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:38:50,507 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 9, 9, 9, 9, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-19 14:38:50,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2021-11-19 14:38:50,748 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (55)] Ended with exit code 0 [2021-11-19 14:38:50,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:38:50,912 INFO L402 AbstractCegarLoop]: === Iteration 40 === 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 14:38:50,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:38:50,913 INFO L85 PathProgramCache]: Analyzing trace with hash 2145351394, now seen corresponding path program 1 times [2021-11-19 14:38:50,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:38:50,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [739727249] [2021-11-19 14:38:50,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:38:50,916 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:38:50,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:38:50,917 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:38:50,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2021-11-19 14:38:54,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:38:55,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 3064 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 14:38:55,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:38:55,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-11-19 14:38:55,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-19 14:38:59,572 INFO L134 CoverageAnalysis]: Checked inductivity of 988 backedges. 344 proven. 3 refuted. 0 times theorem prover too weak. 641 trivial. 0 not checked. [2021-11-19 14:38:59,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:39:03,515 INFO L134 CoverageAnalysis]: Checked inductivity of 988 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 969 trivial. 0 not checked. [2021-11-19 14:39:03,516 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:39:03,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [739727249] [2021-11-19 14:39:03,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [739727249] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:39:03,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1532290939] [2021-11-19 14:39:03,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:39:03,517 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:39:03,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:39:03,518 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:39:03,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (57)] Waiting until timeout for monitored process [2021-11-19 14:39:10,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:39:10,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 3064 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:39:10,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:39:13,820 INFO L134 CoverageAnalysis]: Checked inductivity of 988 backedges. 200 proven. 6 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2021-11-19 14:39:13,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:39:16,459 INFO L134 CoverageAnalysis]: Checked inductivity of 988 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 982 trivial. 0 not checked. [2021-11-19 14:39:16,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1532290939] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:39:16,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002257441] [2021-11-19 14:39:16,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:39:16,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:39:16,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:39:16,461 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:39:16,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff28ab6-25a9-42af-aba4-3f6c26cb01d4/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-11-19 14:39:18,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:39:19,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 3064 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 14:39:19,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:39:19,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-11-19 14:39:19,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-19 14:39:23,057 INFO L134 CoverageAnalysis]: Checked inductivity of 988 backedges. 344 proven. 3 refuted. 0 times theorem prover too weak. 641 trivial. 0 not checked. [2021-11-19 14:39:23,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:39:26,760 INFO L134 CoverageAnalysis]: Checked inductivity of 988 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 969 trivial. 0 not checked. [2021-11-19 14:39:26,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002257441] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:39:26,760 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:39:26,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5, 5, 7, 7] total 15 [2021-11-19 14:39:26,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009428667] [2021-11-19 14:39:26,762 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:39:26,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-19 14:39:26,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:39:26,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-19 14:39:26,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:39:26,766 INFO L87 Difference]: Start difference. First operand 8807 states and 11747 transitions. Second operand has 15 states, 12 states have (on average 31.25) internal successors, (375), 14 states have internal predecessors, (375), 12 states have call successors, (117), 2 states have call predecessors, (117), 5 states have return successors, (113), 10 states have call predecessors, (113), 12 states have call successors, (113) [2021-11-19 14:39:35,248 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:39:37,685 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:39:42,893 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:39:44,907 WARN L515 Checker$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 14:39:46,922 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:39:48,931 WARN L515 Checker$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 14:39:51,259 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:39:54,014 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:39:55,404 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:39:56,894 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:39:58,418 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:40:00,077 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:40:02,102 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:40:05,076 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:40:07,103 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:40:08,712 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:40:10,222 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:40:12,136 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:40:14,902 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:40:17,491 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:40:18,599 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:40:19,830 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []