./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-farsync.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-farsync.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF --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 3dcd453e519a411dcaaa8ea095e5544a2fd8cdb9a31e662fc6de670ff7f7c541 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:30:53,182 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:30:53,184 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:30:53,245 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:30:53,249 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:30:53,254 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:30:53,256 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:30:53,262 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:30:53,265 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:30:53,273 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:30:53,274 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:30:53,275 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:30:53,276 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:30:53,277 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:30:53,278 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:30:53,280 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:30:53,281 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:30:53,287 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:30:53,289 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:30:53,299 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:30:53,302 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:30:53,304 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:30:53,311 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:30:53,313 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:30:53,318 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:30:53,318 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:30:53,319 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:30:53,321 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:30:53,322 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:30:53,324 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:30:53,324 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:30:53,325 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:30:53,327 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:30:53,328 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:30:53,331 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:30:53,332 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:30:53,333 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:30:53,333 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:30:53,333 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:30:53,334 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:30:53,335 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:30:53,336 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-12 23:30:53,386 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:30:53,386 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:30:53,387 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:30:53,388 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:30:53,388 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:30:53,388 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:30:53,388 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:30:53,388 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:30:53,395 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:30:53,396 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:30:53,397 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:30:53,397 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:30:53,397 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:30:53,398 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:30:53,398 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:30:53,398 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:30:53,399 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:30:53,399 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:30:53,399 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:30:53,399 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:30:53,400 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:30:53,400 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:30:53,400 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:30:53,400 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:30:53,400 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:30:53,401 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:30:53,401 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:30:53,401 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:30:53,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:30:53,403 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:30:53,403 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:30:53,403 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:30:53,404 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:30:53,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:30:53,404 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:30:53,404 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:30:53,405 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:30:53,405 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_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3dcd453e519a411dcaaa8ea095e5544a2fd8cdb9a31e662fc6de670ff7f7c541 [2021-11-12 23:30:53,656 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:30:53,678 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:30:53,681 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:30:53,682 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:30:53,683 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:30:53,685 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-farsync.cil.i [2021-11-12 23:30:53,776 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/data/59063eb01/501b5d4fc50d484c895c5b86dc0cd74a/FLAGb3b861cdb [2021-11-12 23:30:54,729 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:30:54,729 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-farsync.cil.i [2021-11-12 23:30:54,792 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/data/59063eb01/501b5d4fc50d484c895c5b86dc0cd74a/FLAGb3b861cdb [2021-11-12 23:30:55,108 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/data/59063eb01/501b5d4fc50d484c895c5b86dc0cd74a [2021-11-12 23:30:55,114 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:30:55,116 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:30:55,121 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:30:55,122 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:30:55,125 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:30:55,126 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:30:55" (1/1) ... [2021-11-12 23:30:55,128 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fa07fd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:30:55, skipping insertion in model container [2021-11-12 23:30:55,128 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:30:55" (1/1) ... [2021-11-12 23:30:55,136 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:30:55,292 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:30:58,350 WARN L228 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_048c073b-8db8-4222-8b2c-a46481b2a63b/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-farsync.cil.i[320934,320947] [2021-11-12 23:30:58,354 WARN L228 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_048c073b-8db8-4222-8b2c-a46481b2a63b/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-farsync.cil.i[321103,321116] [2021-11-12 23:30:58,355 WARN L228 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_048c073b-8db8-4222-8b2c-a46481b2a63b/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-farsync.cil.i[321270,321283] [2021-11-12 23:30:58,356 WARN L228 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_048c073b-8db8-4222-8b2c-a46481b2a63b/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-farsync.cil.i[321438,321451] [2021-11-12 23:30:58,379 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:30:58,421 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) [2021-11-12 23:30:58,422 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@15b6c8ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:30:58, skipping insertion in model container [2021-11-12 23:30:58,422 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:30:58,423 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:30:58,426 INFO L158 Benchmark]: Toolchain (without parser) took 3307.59ms. Allocated memory was 90.2MB in the beginning and 119.5MB in the end (delta: 29.4MB). Free memory was 45.4MB in the beginning and 63.2MB in the end (delta: -17.8MB). Peak memory consumption was 38.2MB. Max. memory is 16.1GB. [2021-11-12 23:30:58,427 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 90.2MB. Free memory was 42.5MB in the beginning and 42.5MB in the end (delta: 50.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:30:58,429 INFO L158 Benchmark]: CACSL2BoogieTranslator took 3301.33ms. Allocated memory was 90.2MB in the beginning and 119.5MB in the end (delta: 29.4MB). Free memory was 45.2MB in the beginning and 63.2MB in the end (delta: -18.0MB). Peak memory consumption was 38.2MB. Max. memory is 16.1GB. [2021-11-12 23:30:58,431 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 90.2MB. Free memory was 42.5MB in the beginning and 42.5MB in the end (delta: 50.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 3301.33ms. Allocated memory was 90.2MB in the beginning and 119.5MB in the end (delta: 29.4MB). Free memory was 45.2MB in the beginning and 63.2MB in the end (delta: -18.0MB). Peak memory consumption was 38.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 6024]: 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_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-farsync.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF --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 3dcd453e519a411dcaaa8ea095e5544a2fd8cdb9a31e662fc6de670ff7f7c541 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:31:00,821 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:31:00,824 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:31:00,857 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:31:00,858 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:31:00,859 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:31:00,861 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:31:00,864 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:31:00,866 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:31:00,868 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:31:00,869 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:31:00,870 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:31:00,871 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:31:00,872 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:31:00,874 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:31:00,876 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:31:00,877 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:31:00,878 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:31:00,880 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:31:00,883 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:31:00,885 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:31:00,887 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:31:00,888 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:31:00,889 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:31:00,893 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:31:00,894 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:31:00,894 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:31:00,896 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:31:00,896 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:31:00,898 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:31:00,898 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:31:00,899 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:31:00,900 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:31:00,901 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:31:00,903 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:31:00,903 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:31:00,904 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:31:00,905 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:31:00,905 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:31:00,907 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:31:00,907 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:31:00,908 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-12 23:31:00,957 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:31:00,958 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:31:00,960 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:31:00,960 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:31:00,961 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:31:00,961 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:31:00,961 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:31:00,961 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:31:00,962 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:31:00,962 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:31:00,964 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:31:00,965 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:31:00,965 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:31:00,965 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:31:00,965 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:31:00,966 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:31:00,966 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:31:00,966 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:31:00,966 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:31:00,967 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:31:00,967 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:31:00,967 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:31:00,967 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:31:00,968 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:31:00,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:31:00,968 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:31:00,968 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:31:00,968 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:31:00,969 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:31:00,969 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:31:00,969 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:31:00,969 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:31:00,970 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:31:00,970 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_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3dcd453e519a411dcaaa8ea095e5544a2fd8cdb9a31e662fc6de670ff7f7c541 [2021-11-12 23:31:01,399 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:31:01,432 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:31:01,436 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:31:01,438 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:31:01,439 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:31:01,441 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-farsync.cil.i [2021-11-12 23:31:01,539 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/data/8d5781658/268793dd97864002bcf12b75068203de/FLAG63cd2b932 [2021-11-12 23:31:02,721 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:31:02,725 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-farsync.cil.i [2021-11-12 23:31:02,782 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/data/8d5781658/268793dd97864002bcf12b75068203de/FLAG63cd2b932 [2021-11-12 23:31:03,012 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/data/8d5781658/268793dd97864002bcf12b75068203de [2021-11-12 23:31:03,014 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:31:03,016 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:31:03,017 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:31:03,018 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:31:03,022 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:31:03,023 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:31:03" (1/1) ... [2021-11-12 23:31:03,024 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@482c6d3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:31:03, skipping insertion in model container [2021-11-12 23:31:03,024 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:31:03" (1/1) ... [2021-11-12 23:31:03,032 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:31:03,244 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:31:06,451 WARN L228 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_048c073b-8db8-4222-8b2c-a46481b2a63b/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-farsync.cil.i[320934,320947] [2021-11-12 23:31:06,455 WARN L228 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_048c073b-8db8-4222-8b2c-a46481b2a63b/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-farsync.cil.i[321103,321116] [2021-11-12 23:31:06,456 WARN L228 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_048c073b-8db8-4222-8b2c-a46481b2a63b/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-farsync.cil.i[321270,321283] [2021-11-12 23:31:06,456 WARN L228 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_048c073b-8db8-4222-8b2c-a46481b2a63b/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-farsync.cil.i[321438,321451] [2021-11-12 23:31:06,506 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:31:06,561 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:31:06,697 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:31:07,187 WARN L228 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_048c073b-8db8-4222-8b2c-a46481b2a63b/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-farsync.cil.i[320934,320947] [2021-11-12 23:31:07,187 WARN L228 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_048c073b-8db8-4222-8b2c-a46481b2a63b/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-farsync.cil.i[321103,321116] [2021-11-12 23:31:07,188 WARN L228 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_048c073b-8db8-4222-8b2c-a46481b2a63b/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-farsync.cil.i[321270,321283] [2021-11-12 23:31:07,189 WARN L228 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_048c073b-8db8-4222-8b2c-a46481b2a63b/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-farsync.cil.i[321438,321451] [2021-11-12 23:31:07,195 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:31:07,237 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:31:07,820 WARN L228 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_048c073b-8db8-4222-8b2c-a46481b2a63b/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-farsync.cil.i[320934,320947] [2021-11-12 23:31:07,821 WARN L228 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_048c073b-8db8-4222-8b2c-a46481b2a63b/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-farsync.cil.i[321103,321116] [2021-11-12 23:31:07,821 WARN L228 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_048c073b-8db8-4222-8b2c-a46481b2a63b/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-farsync.cil.i[321270,321283] [2021-11-12 23:31:07,822 WARN L228 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_048c073b-8db8-4222-8b2c-a46481b2a63b/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-farsync.cil.i[321438,321451] [2021-11-12 23:31:07,830 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:31:08,112 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:31:08,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:31:08 WrapperNode [2021-11-12 23:31:08,112 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:31:08,114 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:31:08,114 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:31:08,118 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:31:08,125 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:31:08" (1/1) ... [2021-11-12 23:31:08,264 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:31:08" (1/1) ... [2021-11-12 23:31:08,570 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:31:08,572 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:31:08,572 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:31:08,573 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:31:08,583 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:31:08" (1/1) ... [2021-11-12 23:31:08,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:31:08" (1/1) ... [2021-11-12 23:31:08,624 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:31:08" (1/1) ... [2021-11-12 23:31:08,625 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:31:08" (1/1) ... [2021-11-12 23:31:08,816 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:31:08" (1/1) ... [2021-11-12 23:31:08,850 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:31:08" (1/1) ... [2021-11-12 23:31:08,884 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:31:08" (1/1) ... [2021-11-12 23:31:08,915 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:31:08,917 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:31:08,917 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:31:08,917 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:31:08,918 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:31:08" (1/1) ... [2021-11-12 23:31:08,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:31:08,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:31:08,951 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:31:08,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:31:09,010 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_EMGentry_exit_fst_cleanup_module_12_2 [2021-11-12 23:31:09,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_EMGentry_exit_fst_cleanup_module_12_2 [2021-11-12 23:31:09,011 INFO L130 BoogieDeclarations]: Found specification of procedure pci_release_regions [2021-11-12 23:31:09,011 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_release_regions [2021-11-12 23:31:09,011 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-12 23:31:09,012 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-12 23:31:09,012 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-12 23:31:09,012 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-12 23:31:09,012 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-12 23:31:09,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-12 23:31:09,013 INFO L130 BoogieDeclarations]: Found specification of procedure fst_remove_one [2021-11-12 23:31:09,013 INFO L138 BoogieDeclarations]: Found implementation of procedure fst_remove_one [2021-11-12 23:31:09,013 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2021-11-12 23:31:09,013 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2021-11-12 23:31:09,013 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-12 23:31:09,014 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-12 23:31:09,014 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_ok [2021-11-12 23:31:09,014 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_ok [2021-11-12 23:31:09,014 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_on [2021-11-12 23:31:09,014 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_on [2021-11-12 23:31:09,015 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_toio [2021-11-12 23:31:09,015 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_toio [2021-11-12 23:31:09,015 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_61 [2021-11-12 23:31:09,015 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_61 [2021-11-12 23:31:09,015 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_67 [2021-11-12 23:31:09,016 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_67 [2021-11-12 23:31:09,016 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-12 23:31:09,017 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-12 23:31:09,017 INFO L130 BoogieDeclarations]: Found specification of procedure fst_close [2021-11-12 23:31:09,017 INFO L138 BoogieDeclarations]: Found implementation of procedure fst_close [2021-11-12 23:31:09,018 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~structbegin~C_INT~structend~~TO~C_INT [2021-11-12 23:31:09,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~structbegin~C_INT~structend~~TO~C_INT [2021-11-12 23:31:09,018 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-12 23:31:09,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-12 23:31:09,018 INFO L130 BoogieDeclarations]: Found specification of procedure netif_rx [2021-11-12 23:31:09,019 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_rx [2021-11-12 23:31:09,019 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-12 23:31:09,019 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-12 23:31:09,019 INFO L130 BoogieDeclarations]: Found specification of procedure fst_tx_timeout [2021-11-12 23:31:09,019 INFO L138 BoogieDeclarations]: Found implementation of procedure fst_tx_timeout [2021-11-12 23:31:09,019 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-12 23:31:09,020 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-12 23:31:09,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 23:31:09,021 INFO L130 BoogieDeclarations]: Found specification of procedure iounmap [2021-11-12 23:31:09,022 INFO L138 BoogieDeclarations]: Found implementation of procedure iounmap [2021-11-12 23:31:09,022 INFO L130 BoogieDeclarations]: Found specification of procedure fst_open [2021-11-12 23:31:09,022 INFO L138 BoogieDeclarations]: Found implementation of procedure fst_open [2021-11-12 23:31:09,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:31:09,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-12 23:31:09,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-12 23:31:09,023 INFO L130 BoogieDeclarations]: Found specification of procedure hdlc_type_trans [2021-11-12 23:31:09,023 INFO L138 BoogieDeclarations]: Found implementation of procedure hdlc_type_trans [2021-11-12 23:31:09,024 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-12 23:31:09,025 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-12 23:31:09,025 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-11-12 23:31:09,025 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-11-12 23:31:09,025 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-12 23:31:09,025 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-12 23:31:09,026 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-12 23:31:09,026 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-12 23:31:09,027 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-12 23:31:09,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-12 23:31:09,027 INFO L130 BoogieDeclarations]: Found specification of procedure dev_to_hdlc [2021-11-12 23:31:09,027 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_to_hdlc [2021-11-12 23:31:09,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-12 23:31:09,028 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-12 23:31:09,028 INFO L130 BoogieDeclarations]: Found specification of procedure fst_issue_cmd [2021-11-12 23:31:09,028 INFO L138 BoogieDeclarations]: Found implementation of procedure fst_issue_cmd [2021-11-12 23:31:09,028 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2021-11-12 23:31:09,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2021-11-12 23:31:09,029 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_err_code [2021-11-12 23:31:09,029 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_err_code [2021-11-12 23:31:09,029 INFO L130 BoogieDeclarations]: Found specification of procedure pci_free_consistent [2021-11-12 23:31:09,029 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_free_consistent [2021-11-12 23:31:09,029 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2021-11-12 23:31:09,030 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2021-11-12 23:31:09,031 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2021-11-12 23:31:09,031 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2021-11-12 23:31:09,031 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-12 23:31:09,031 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-12 23:31:09,031 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 23:31:09,031 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_1 [2021-11-12 23:31:09,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_1 [2021-11-12 23:31:09,033 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_2 [2021-11-12 23:31:09,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_2 [2021-11-12 23:31:09,033 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_card_lock_of_fst_card_info [2021-11-12 23:31:09,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_card_lock_of_fst_card_info [2021-11-12 23:31:09,033 INFO L130 BoogieDeclarations]: Found specification of procedure fst_cpureset [2021-11-12 23:31:09,034 INFO L138 BoogieDeclarations]: Found implementation of procedure fst_cpureset [2021-11-12 23:31:09,034 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-12 23:31:09,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-12 23:31:09,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 23:31:09,034 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-12 23:31:09,035 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-12 23:31:09,035 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-12 23:31:09,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-12 23:31:09,035 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-12 23:31:09,035 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2021-11-12 23:31:09,036 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2021-11-12 23:31:09,036 INFO L130 BoogieDeclarations]: Found specification of procedure tasklet_schedule [2021-11-12 23:31:09,036 INFO L138 BoogieDeclarations]: Found implementation of procedure tasklet_schedule [2021-11-12 23:31:09,036 INFO L130 BoogieDeclarations]: Found specification of procedure fst_q_work_item [2021-11-12 23:31:09,037 INFO L138 BoogieDeclarations]: Found implementation of procedure fst_q_work_item [2021-11-12 23:31:09,037 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_spin_lock [2021-11-12 23:31:09,039 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_spin_lock [2021-11-12 23:31:09,042 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-12 23:31:09,043 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-12 23:31:09,043 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2021-11-12 23:31:09,043 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2021-11-12 23:31:09,044 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2021-11-12 23:31:09,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2021-11-12 23:31:09,045 INFO L130 BoogieDeclarations]: Found specification of procedure writel [2021-11-12 23:31:09,045 INFO L138 BoogieDeclarations]: Found implementation of procedure writel [2021-11-12 23:31:09,046 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-12 23:31:09,052 INFO L130 BoogieDeclarations]: Found specification of procedure writeb [2021-11-12 23:31:09,053 INFO L138 BoogieDeclarations]: Found implementation of procedure writeb [2021-11-12 23:31:09,053 INFO L130 BoogieDeclarations]: Found specification of procedure writew [2021-11-12 23:31:09,053 INFO L138 BoogieDeclarations]: Found implementation of procedure writew [2021-11-12 23:31:09,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:31:09,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:31:09,054 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-12 23:31:09,054 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-12 23:31:09,054 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 23:31:09,054 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-12 23:31:09,055 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-12 23:31:09,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-12 23:31:09,055 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-12 23:31:09,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-12 23:31:09,055 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-12 23:31:09,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-12 23:31:09,056 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_off [2021-11-12 23:31:09,056 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_off [2021-11-12 23:31:09,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-12 23:31:09,056 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-12 23:31:09,056 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-12 23:31:09,056 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-12 23:31:09,057 INFO L130 BoogieDeclarations]: Found specification of procedure pci_alloc_consistent [2021-11-12 23:31:09,057 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_alloc_consistent [2021-11-12 23:31:09,057 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2021-11-12 23:31:09,057 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2021-11-12 23:31:09,057 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:31:09,057 INFO L130 BoogieDeclarations]: Found specification of procedure module_put [2021-11-12 23:31:09,058 INFO L138 BoogieDeclarations]: Found implementation of procedure module_put [2021-11-12 23:31:09,058 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 23:31:09,058 INFO L130 BoogieDeclarations]: Found specification of procedure ioremap [2021-11-12 23:31:09,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ioremap [2021-11-12 23:31:09,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-12 23:31:09,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-12 23:31:09,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-12 23:31:09,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-12 23:31:09,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-12 23:31:09,059 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-11-12 23:31:09,059 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-11-12 23:31:09,059 INFO L130 BoogieDeclarations]: Found specification of procedure outw [2021-11-12 23:31:09,060 INFO L138 BoogieDeclarations]: Found implementation of procedure outw [2021-11-12 23:31:09,060 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2021-11-12 23:31:09,060 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2021-11-12 23:31:09,060 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-12 23:31:09,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-12 23:31:09,060 INFO L130 BoogieDeclarations]: Found specification of procedure outl [2021-11-12 23:31:09,061 INFO L138 BoogieDeclarations]: Found implementation of procedure outl [2021-11-12 23:31:09,061 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_irq [2021-11-12 23:31:09,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_irq [2021-11-12 23:31:09,061 INFO L130 BoogieDeclarations]: Found specification of procedure farsync_type_trans [2021-11-12 23:31:09,061 INFO L138 BoogieDeclarations]: Found implementation of procedure farsync_type_trans [2021-11-12 23:31:09,062 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-12 23:31:09,062 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-12 23:31:09,062 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-12 23:31:09,062 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-12 23:31:09,062 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~C_INT [2021-11-12 23:31:09,062 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~C_INT [2021-11-12 23:31:09,063 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_fst_work_q_lock [2021-11-12 23:31:09,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_fst_work_q_lock [2021-11-12 23:31:09,063 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-12 23:31:09,063 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-12 23:31:09,063 INFO L130 BoogieDeclarations]: Found specification of procedure fst_disable_intr [2021-11-12 23:31:09,063 INFO L138 BoogieDeclarations]: Found implementation of procedure fst_disable_intr [2021-11-12 23:31:09,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-12 23:31:09,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-12 23:31:09,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-12 23:31:09,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-12 23:31:09,064 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-12 23:31:09,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-12 23:31:09,065 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2021-11-12 23:31:09,065 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2021-11-12 23:31:09,065 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2021-11-12 23:31:09,065 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2021-11-12 23:31:09,065 INFO L130 BoogieDeclarations]: Found specification of procedure do_bottom_half_tx [2021-11-12 23:31:09,066 INFO L138 BoogieDeclarations]: Found implementation of procedure do_bottom_half_tx [2021-11-12 23:31:09,066 INFO L130 BoogieDeclarations]: Found specification of procedure fst_process_rx_status [2021-11-12 23:31:09,066 INFO L138 BoogieDeclarations]: Found implementation of procedure fst_process_rx_status [2021-11-12 23:31:09,066 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-12 23:31:09,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-12 23:31:09,066 INFO L130 BoogieDeclarations]: Found specification of procedure readw [2021-11-12 23:31:09,067 INFO L138 BoogieDeclarations]: Found implementation of procedure readw [2021-11-12 23:31:09,067 INFO L130 BoogieDeclarations]: Found specification of procedure hdlc_ioctl [2021-11-12 23:31:09,067 INFO L138 BoogieDeclarations]: Found implementation of procedure hdlc_ioctl [2021-11-12 23:31:09,067 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2021-11-12 23:31:09,067 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2021-11-12 23:31:09,067 INFO L130 BoogieDeclarations]: Found specification of procedure readl [2021-11-12 23:31:09,068 INFO L138 BoogieDeclarations]: Found implementation of procedure readl [2021-11-12 23:31:09,068 INFO L130 BoogieDeclarations]: Found specification of procedure inl [2021-11-12 23:31:09,068 INFO L138 BoogieDeclarations]: Found implementation of procedure inl [2021-11-12 23:31:09,068 INFO L130 BoogieDeclarations]: Found specification of procedure fst_clear_intr [2021-11-12 23:31:09,068 INFO L138 BoogieDeclarations]: Found implementation of procedure fst_clear_intr [2021-11-12 23:31:09,068 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reset_mac_header [2021-11-12 23:31:09,069 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reset_mac_header [2021-11-12 23:31:09,069 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-12 23:31:09,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-12 23:31:09,069 INFO L130 BoogieDeclarations]: Found specification of procedure readb [2021-11-12 23:31:09,069 INFO L138 BoogieDeclarations]: Found implementation of procedure readb [2021-11-12 23:31:10,222 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-12 23:31:44,600 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-12 23:31:44,687 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:31:44,687 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-12 23:31:44,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:31:44 BoogieIcfgContainer [2021-11-12 23:31:44,693 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:31:44,694 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:31:44,695 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:31:44,698 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:31:44,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:31:03" (1/3) ... [2021-11-12 23:31:44,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37560f89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:31:44, skipping insertion in model container [2021-11-12 23:31:44,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:31:08" (2/3) ... [2021-11-12 23:31:44,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37560f89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:31:44, skipping insertion in model container [2021-11-12 23:31:44,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:31:44" (3/3) ... [2021-11-12 23:31:44,701 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-wan-farsync.cil.i [2021-11-12 23:31:44,706 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:31:44,707 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-12 23:31:44,770 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:31:44,777 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 [2021-11-12 23:31:44,777 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-12 23:31:44,832 INFO L276 IsEmpty]: Start isEmpty. Operand has 1831 states, 1250 states have (on average 1.2888) internal successors, (1611), 1264 states have internal predecessors, (1611), 488 states have call successors, (488), 91 states have call predecessors, (488), 90 states have return successors, (481), 479 states have call predecessors, (481), 481 states have call successors, (481) [2021-11-12 23:31:44,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-12 23:31:44,848 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:31:44,849 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:31:44,849 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)] === [2021-11-12 23:31:44,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:44,855 INFO L85 PathProgramCache]: Analyzing trace with hash -354153155, now seen corresponding path program 1 times [2021-11-12 23:31:44,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:31:44,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1692575985] [2021-11-12 23:31:44,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:31:44,872 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:31:44,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:31:44,875 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:31:44,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:31:46,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:46,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 1051 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:31:46,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:46,829 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-12 23:31:46,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:47,186 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-12 23:31:47,187 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:31:47,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1692575985] [2021-11-12 23:31:47,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1692575985] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:31:47,188 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:31:47,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 23:31:47,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638359656] [2021-11-12 23:31:47,190 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:31:47,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:31:47,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:31:47,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:31:47,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:31:47,229 INFO L87 Difference]: Start difference. First operand has 1831 states, 1250 states have (on average 1.2888) internal successors, (1611), 1264 states have internal predecessors, (1611), 488 states have call successors, (488), 91 states have call predecessors, (488), 90 states have return successors, (481), 479 states have call predecessors, (481), 481 states have call successors, (481) Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-12 23:31:49,417 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:31:57,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:31:57,123 INFO L93 Difference]: Finished difference Result 7100 states and 10188 transitions. [2021-11-12 23:31:57,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:31:57,127 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 83 [2021-11-12 23:31:57,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:31:57,200 INFO L225 Difference]: With dead ends: 7100 [2021-11-12 23:31:57,201 INFO L226 Difference]: Without dead ends: 5265 [2021-11-12 23:31:57,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:31:57,226 INFO L933 BasicCegarLoop]: 3496 mSDtfsCounter, 6479 mSDsluCounter, 4007 mSDsCounter, 0 mSdLazyCounter, 989 mSolverCounterSat, 918 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8087.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6479 SdHoareTripleChecker+Valid, 7503 SdHoareTripleChecker+Invalid, 1908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 73.64ms SdHoareTripleChecker+Time, 918 IncrementalHoareTripleChecker+Valid, 989 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9204.74ms IncrementalHoareTripleChecker+Time [2021-11-12 23:31:57,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6479 Valid, 7503 Invalid, 1908 Unknown, 0 Unchecked, 73.64ms Time], IncrementalHoareTripleChecker [918 Valid, 989 Invalid, 1 Unknown, 0 Unchecked, 9204.74ms Time] [2021-11-12 23:31:57,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5265 states. [2021-11-12 23:31:57,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5265 to 5238. [2021-11-12 23:31:57,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5238 states, 3609 states have (on average 1.287337212524245) internal successors, (4646), 3647 states have internal predecessors, (4646), 1363 states have call successors, (1363), 264 states have call predecessors, (1363), 263 states have return successors, (1359), 1353 states have call predecessors, (1359), 1359 states have call successors, (1359) [2021-11-12 23:31:57,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5238 states to 5238 states and 7368 transitions. [2021-11-12 23:31:57,743 INFO L78 Accepts]: Start accepts. Automaton has 5238 states and 7368 transitions. Word has length 83 [2021-11-12 23:31:57,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:31:57,744 INFO L470 AbstractCegarLoop]: Abstraction has 5238 states and 7368 transitions. [2021-11-12 23:31:57,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-12 23:31:57,745 INFO L276 IsEmpty]: Start isEmpty. Operand 5238 states and 7368 transitions. [2021-11-12 23:31:57,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-12 23:31:57,763 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:31:57,764 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:31:57,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:57,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:31:57,986 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-12 23:31:57,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:57,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1396464343, now seen corresponding path program 1 times [2021-11-12 23:31:57,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:31:57,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1879970615] [2021-11-12 23:31:57,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:31:57,990 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:31:57,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:31:57,994 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:31:58,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:31:59,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:59,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 1144 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:31:59,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:59,874 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-12 23:31:59,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:32:00,176 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-12 23:32:00,176 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:32:00,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1879970615] [2021-11-12 23:32:00,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1879970615] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:32:00,177 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:32:00,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 23:32:00,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176180046] [2021-11-12 23:32:00,178 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:32:00,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:32:00,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:32:00,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:32:00,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:32:00,180 INFO L87 Difference]: Start difference. First operand 5238 states and 7368 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-12 23:32:02,369 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:32:08,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:32:08,209 INFO L93 Difference]: Finished difference Result 14970 states and 21098 transitions. [2021-11-12 23:32:08,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:32:08,210 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 93 [2021-11-12 23:32:08,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:32:08,299 INFO L225 Difference]: With dead ends: 14970 [2021-11-12 23:32:08,299 INFO L226 Difference]: Without dead ends: 9747 [2021-11-12 23:32:08,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:32:08,329 INFO L933 BasicCegarLoop]: 3346 mSDtfsCounter, 4268 mSDsluCounter, 4019 mSDsCounter, 0 mSdLazyCounter, 1035 mSolverCounterSat, 41 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6765.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4268 SdHoareTripleChecker+Valid, 7365 SdHoareTripleChecker+Invalid, 1077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 47.73ms SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1035 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7386.15ms IncrementalHoareTripleChecker+Time [2021-11-12 23:32:08,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4268 Valid, 7365 Invalid, 1077 Unknown, 0 Unchecked, 47.73ms Time], IncrementalHoareTripleChecker [41 Valid, 1035 Invalid, 1 Unknown, 0 Unchecked, 7386.15ms Time] [2021-11-12 23:32:08,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9747 states. [2021-11-12 23:32:08,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9747 to 9695. [2021-11-12 23:32:08,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9695 states, 6753 states have (on average 1.2980897378942693) internal successors, (8766), 6820 states have internal predecessors, (8766), 2434 states have call successors, (2434), 508 states have call predecessors, (2434), 505 states have return successors, (2430), 2416 states have call predecessors, (2430), 2430 states have call successors, (2430) [2021-11-12 23:32:09,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9695 states to 9695 states and 13630 transitions. [2021-11-12 23:32:09,014 INFO L78 Accepts]: Start accepts. Automaton has 9695 states and 13630 transitions. Word has length 93 [2021-11-12 23:32:09,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:32:09,018 INFO L470 AbstractCegarLoop]: Abstraction has 9695 states and 13630 transitions. [2021-11-12 23:32:09,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-12 23:32:09,019 INFO L276 IsEmpty]: Start isEmpty. Operand 9695 states and 13630 transitions. [2021-11-12 23:32:09,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-12 23:32:09,025 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:32:09,025 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:32:09,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:32:09,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:32:09,249 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-12 23:32:09,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:32:09,250 INFO L85 PathProgramCache]: Analyzing trace with hash -701589471, now seen corresponding path program 1 times [2021-11-12 23:32:09,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:32:09,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1837192403] [2021-11-12 23:32:09,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:32:09,252 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:32:09,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:32:09,254 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:32:09,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:32:10,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:32:10,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 1068 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:32:10,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:32:10,784 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-12 23:32:10,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:32:11,091 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-12 23:32:11,091 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:32:11,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1837192403] [2021-11-12 23:32:11,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1837192403] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:32:11,091 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:32:11,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:32:11,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849845785] [2021-11-12 23:32:11,092 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:32:11,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:32:11,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:32:11,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:32:11,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:32:11,093 INFO L87 Difference]: Start difference. First operand 9695 states and 13630 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-12 23:32:13,244 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:32:14,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:32:14,102 INFO L93 Difference]: Finished difference Result 26953 states and 37763 transitions. [2021-11-12 23:32:14,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:32:14,103 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 91 [2021-11-12 23:32:14,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:32:14,252 INFO L225 Difference]: With dead ends: 26953 [2021-11-12 23:32:14,252 INFO L226 Difference]: Without dead ends: 17273 [2021-11-12 23:32:14,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:32:14,300 INFO L933 BasicCegarLoop]: 2987 mSDtfsCounter, 2287 mSDsluCounter, 2498 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 16 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2303.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2287 SdHoareTripleChecker+Valid, 5485 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.33ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2365.19ms IncrementalHoareTripleChecker+Time [2021-11-12 23:32:14,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2287 Valid, 5485 Invalid, 75 Unknown, 0 Unchecked, 19.33ms Time], IncrementalHoareTripleChecker [16 Valid, 58 Invalid, 1 Unknown, 0 Unchecked, 2365.19ms Time] [2021-11-12 23:32:14,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17273 states. [2021-11-12 23:32:15,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17273 to 17241. [2021-11-12 23:32:15,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17241 states, 12014 states have (on average 1.2884135175628433) internal successors, (15479), 12139 states have internal predecessors, (15479), 4273 states have call successors, (4273), 956 states have call predecessors, (4273), 951 states have return successors, (4269), 4232 states have call predecessors, (4269), 4269 states have call successors, (4269) [2021-11-12 23:32:15,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17241 states to 17241 states and 24021 transitions. [2021-11-12 23:32:15,417 INFO L78 Accepts]: Start accepts. Automaton has 17241 states and 24021 transitions. Word has length 91 [2021-11-12 23:32:15,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:32:15,420 INFO L470 AbstractCegarLoop]: Abstraction has 17241 states and 24021 transitions. [2021-11-12 23:32:15,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-12 23:32:15,420 INFO L276 IsEmpty]: Start isEmpty. Operand 17241 states and 24021 transitions. [2021-11-12 23:32:15,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-12 23:32:15,422 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:32:15,423 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:32:15,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:32:15,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:32:15,637 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-12 23:32:15,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:32:15,638 INFO L85 PathProgramCache]: Analyzing trace with hash -447177211, now seen corresponding path program 1 times [2021-11-12 23:32:15,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:32:15,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1095294690] [2021-11-12 23:32:15,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:32:15,640 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:32:15,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:32:15,643 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:32:15,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:32:16,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:32:16,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 1120 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:32:16,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:32:17,354 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-12 23:32:17,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:32:17,634 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-12 23:32:17,634 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:32:17,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1095294690] [2021-11-12 23:32:17,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1095294690] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:32:17,635 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:32:17,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:32:17,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332235541] [2021-11-12 23:32:17,635 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:32:17,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:32:17,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:32:17,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:32:17,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:32:17,636 INFO L87 Difference]: Start difference. First operand 17241 states and 24021 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 23:32:19,779 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:32:20,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:32:20,862 INFO L93 Difference]: Finished difference Result 44216 states and 61284 transitions. [2021-11-12 23:32:20,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:32:20,862 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 95 [2021-11-12 23:32:20,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:32:20,999 INFO L225 Difference]: With dead ends: 44216 [2021-11-12 23:32:21,000 INFO L226 Difference]: Without dead ends: 26990 [2021-11-12 23:32:21,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:32:21,074 INFO L933 BasicCegarLoop]: 2927 mSDtfsCounter, 1896 mSDsluCounter, 2513 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2226.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1896 SdHoareTripleChecker+Valid, 5440 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.77ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2274.83ms IncrementalHoareTripleChecker+Time [2021-11-12 23:32:21,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1896 Valid, 5440 Invalid, 43 Unknown, 0 Unchecked, 15.77ms Time], IncrementalHoareTripleChecker [7 Valid, 35 Invalid, 1 Unknown, 0 Unchecked, 2274.83ms Time] [2021-11-12 23:32:21,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26990 states. [2021-11-12 23:32:22,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26990 to 26952. [2021-11-12 23:32:22,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26952 states, 18746 states have (on average 1.2844873573028912) internal successors, (24079), 18957 states have internal predecessors, (24079), 6542 states have call successors, (6542), 1670 states have call predecessors, (6542), 1661 states have return successors, (6550), 6449 states have call predecessors, (6550), 6538 states have call successors, (6550) [2021-11-12 23:32:22,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26952 states to 26952 states and 37171 transitions. [2021-11-12 23:32:22,741 INFO L78 Accepts]: Start accepts. Automaton has 26952 states and 37171 transitions. Word has length 95 [2021-11-12 23:32:22,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:32:22,742 INFO L470 AbstractCegarLoop]: Abstraction has 26952 states and 37171 transitions. [2021-11-12 23:32:22,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 23:32:22,742 INFO L276 IsEmpty]: Start isEmpty. Operand 26952 states and 37171 transitions. [2021-11-12 23:32:22,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-12 23:32:22,744 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:32:22,744 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:32:22,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:32:22,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:32:22,957 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-12 23:32:22,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:32:22,958 INFO L85 PathProgramCache]: Analyzing trace with hash 595683630, now seen corresponding path program 1 times [2021-11-12 23:32:22,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:32:22,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [463967027] [2021-11-12 23:32:22,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:32:22,960 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:32:22,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:32:22,963 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:32:23,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:32:24,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:32:24,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 1069 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:32:24,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:32:24,507 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-12 23:32:24,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:32:24,783 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-12 23:32:24,783 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:32:24,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [463967027] [2021-11-12 23:32:24,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [463967027] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:32:24,783 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:32:24,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:32:24,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667908378] [2021-11-12 23:32:24,784 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:32:24,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:32:24,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:32:24,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:32:24,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:32:24,786 INFO L87 Difference]: Start difference. First operand 26952 states and 37171 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-12 23:32:26,915 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:32:29,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:32:29,070 INFO L93 Difference]: Finished difference Result 78148 states and 107591 transitions. [2021-11-12 23:32:29,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:32:29,071 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 92 [2021-11-12 23:32:29,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:32:29,364 INFO L225 Difference]: With dead ends: 78148 [2021-11-12 23:32:29,365 INFO L226 Difference]: Without dead ends: 51211 [2021-11-12 23:32:29,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:32:29,462 INFO L933 BasicCegarLoop]: 3269 mSDtfsCounter, 2419 mSDsluCounter, 2499 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 16 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2269.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2419 SdHoareTripleChecker+Valid, 5768 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.49ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2320.05ms IncrementalHoareTripleChecker+Time [2021-11-12 23:32:29,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2419 Valid, 5768 Invalid, 75 Unknown, 0 Unchecked, 17.49ms Time], IncrementalHoareTripleChecker [16 Valid, 58 Invalid, 1 Unknown, 0 Unchecked, 2320.05ms Time] [2021-11-12 23:32:29,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51211 states. [2021-11-12 23:32:32,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51211 to 51161. [2021-11-12 23:32:32,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51161 states, 35673 states have (on average 1.2755865780842655) internal successors, (45504), 36091 states have internal predecessors, (45504), 12266 states have call successors, (12266), 3236 states have call predecessors, (12266), 3219 states have return successors, (12286), 12069 states have call predecessors, (12286), 12262 states have call successors, (12286) [2021-11-12 23:32:32,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51161 states to 51161 states and 70056 transitions. [2021-11-12 23:32:32,559 INFO L78 Accepts]: Start accepts. Automaton has 51161 states and 70056 transitions. Word has length 92 [2021-11-12 23:32:32,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:32:32,560 INFO L470 AbstractCegarLoop]: Abstraction has 51161 states and 70056 transitions. [2021-11-12 23:32:32,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-12 23:32:32,561 INFO L276 IsEmpty]: Start isEmpty. Operand 51161 states and 70056 transitions. [2021-11-12 23:32:32,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-12 23:32:32,567 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:32:32,568 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 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] [2021-11-12 23:32:32,594 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-12 23:32:32,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:32:32,775 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-12 23:32:32,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:32:32,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1037125969, now seen corresponding path program 1 times [2021-11-12 23:32:32,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:32:32,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [773587512] [2021-11-12 23:32:32,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:32:32,778 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:32:32,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:32:32,781 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:32:32,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:32:34,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:32:34,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 1135 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:32:34,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:32:34,551 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-11-12 23:32:34,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:32:34,825 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-12 23:32:34,825 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:32:34,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [773587512] [2021-11-12 23:32:34,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [773587512] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:32:34,825 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:32:34,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 23:32:34,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242093588] [2021-11-12 23:32:34,826 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:32:34,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:32:34,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:32:34,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:32:34,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:32:34,827 INFO L87 Difference]: Start difference. First operand 51161 states and 70056 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, (19), 3 states have call predecessors, (19), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 23:32:36,943 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:32:44,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:32:44,761 INFO L93 Difference]: Finished difference Result 182410 states and 249380 transitions. [2021-11-12 23:32:44,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:32:44,763 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, (19), 3 states have call predecessors, (19), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 108 [2021-11-12 23:32:44,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:32:45,756 INFO L225 Difference]: With dead ends: 182410 [2021-11-12 23:32:45,756 INFO L226 Difference]: Without dead ends: 131264 [2021-11-12 23:32:45,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:32:45,936 INFO L933 BasicCegarLoop]: 4062 mSDtfsCounter, 4537 mSDsluCounter, 5381 mSDsCounter, 0 mSdLazyCounter, 874 mSolverCounterSat, 15 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5053.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4537 SdHoareTripleChecker+Valid, 9443 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 29.44ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 874 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5526.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:32:45,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4537 Valid, 9443 Invalid, 890 Unknown, 0 Unchecked, 29.44ms Time], IncrementalHoareTripleChecker [15 Valid, 874 Invalid, 1 Unknown, 0 Unchecked, 5526.00ms Time] [2021-11-12 23:32:46,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131264 states. [2021-11-12 23:32:52,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131264 to 131116. [2021-11-12 23:32:52,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131116 states, 91340 states have (on average 1.2688197941756076) internal successors, (115894), 92622 states have internal predecessors, (115894), 31470 states have call successors, (31470), 8480 states have call predecessors, (31470), 8303 states have return successors, (31570), 30657 states have call predecessors, (31570), 31466 states have call successors, (31570) [2021-11-12 23:32:53,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131116 states to 131116 states and 178934 transitions. [2021-11-12 23:32:53,248 INFO L78 Accepts]: Start accepts. Automaton has 131116 states and 178934 transitions. Word has length 108 [2021-11-12 23:32:53,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:32:53,249 INFO L470 AbstractCegarLoop]: Abstraction has 131116 states and 178934 transitions. [2021-11-12 23:32:53,250 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, (19), 3 states have call predecessors, (19), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 23:32:53,250 INFO L276 IsEmpty]: Start isEmpty. Operand 131116 states and 178934 transitions. [2021-11-12 23:32:53,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-12 23:32:53,258 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:32:53,258 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 5, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:32:53,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:32:53,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:32:53,481 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)] === [2021-11-12 23:32:53,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:32:53,482 INFO L85 PathProgramCache]: Analyzing trace with hash 154527813, now seen corresponding path program 1 times [2021-11-12 23:32:53,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:32:53,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [127901211] [2021-11-12 23:32:53,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:32:53,485 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:32:53,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:32:53,487 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:32:53,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:32:54,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:32:54,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 1213 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:32:54,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:32:55,204 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-12 23:32:55,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:32:55,619 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2021-11-12 23:32:55,619 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:32:55,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [127901211] [2021-11-12 23:32:55,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [127901211] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:32:55,620 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:32:55,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 23:32:55,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246843601] [2021-11-12 23:32:55,621 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:32:55,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:32:55,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:32:55,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:32:55,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:32:55,623 INFO L87 Difference]: Start difference. First operand 131116 states and 178934 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-12 23:33:01,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:33:01,104 INFO L93 Difference]: Finished difference Result 262356 states and 358125 transitions. [2021-11-12 23:33:01,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:33:01,104 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 150 [2021-11-12 23:33:01,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:33:02,196 INFO L225 Difference]: With dead ends: 262356 [2021-11-12 23:33:02,197 INFO L226 Difference]: Without dead ends: 131332 [2021-11-12 23:33:02,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:33:02,572 INFO L933 BasicCegarLoop]: 2549 mSDtfsCounter, 2 mSDsluCounter, 5094 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 7643 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.97ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.69ms IncrementalHoareTripleChecker+Time [2021-11-12 23:33:02,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 7643 Invalid, 9 Unknown, 0 Unchecked, 15.97ms Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 35.69ms Time] [2021-11-12 23:33:02,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131332 states. [2021-11-12 23:33:08,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131332 to 131332. [2021-11-12 23:33:08,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131332 states, 91556 states have (on average 1.268185591332081) internal successors, (116110), 92838 states have internal predecessors, (116110), 31470 states have call successors, (31470), 8480 states have call predecessors, (31470), 8303 states have return successors, (31570), 30657 states have call predecessors, (31570), 31466 states have call successors, (31570) [2021-11-12 23:33:09,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131332 states to 131332 states and 179150 transitions. [2021-11-12 23:33:09,251 INFO L78 Accepts]: Start accepts. Automaton has 131332 states and 179150 transitions. Word has length 150 [2021-11-12 23:33:09,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:33:09,252 INFO L470 AbstractCegarLoop]: Abstraction has 131332 states and 179150 transitions. [2021-11-12 23:33:09,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-12 23:33:09,252 INFO L276 IsEmpty]: Start isEmpty. Operand 131332 states and 179150 transitions. [2021-11-12 23:33:09,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-12 23:33:09,259 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:33:09,260 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 5, 5, 5, 4, 4, 4, 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] [2021-11-12 23:33:09,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:33:09,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:33:09,481 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)] === [2021-11-12 23:33:09,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:33:09,483 INFO L85 PathProgramCache]: Analyzing trace with hash 535749181, now seen corresponding path program 1 times [2021-11-12 23:33:09,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:33:09,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [952146844] [2021-11-12 23:33:09,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:33:09,484 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:33:09,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:33:09,485 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:33:09,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:33:10,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:33:10,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 1223 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:33:10,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:33:11,148 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 76 proven. 4 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-12 23:33:11,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:33:11,674 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2021-11-12 23:33:11,674 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:33:11,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [952146844] [2021-11-12 23:33:11,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [952146844] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:33:11,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2059113440] [2021-11-12 23:33:11,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:33:11,675 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:33:11,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:33:11,678 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:33:11,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048c073b-8db8-4222-8b2c-a46481b2a63b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-12 23:33:12,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:33:12,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 1223 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:33:12,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:33:14,127 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-11-12 23:33:14,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:33:14,743 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-11-12 23:33:14,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2059113440] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:33:14,743 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:33:14,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [5, 5] total 13 [2021-11-12 23:33:14,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695692416] [2021-11-12 23:33:14,744 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:33:14,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:33:14,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:33:14,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:33:14,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:33:14,747 INFO L87 Difference]: Start difference. First operand 131332 states and 179150 transitions. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 5 states have internal predecessors, (77), 2 states have call successors, (35), 4 states have call predecessors, (35), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32)