./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-irda-via-ircc.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-irda-via-ircc.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 6c1be66de5de44f99e184f931232a9d8bcb0b8fd4712efbcede070913355a2c0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 15:44:14,710 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 15:44:14,713 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 15:44:14,768 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 15:44:14,769 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 15:44:14,773 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 15:44:14,775 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 15:44:14,779 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 15:44:14,781 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 15:44:14,789 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 15:44:14,790 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 15:44:14,792 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 15:44:14,792 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 15:44:14,795 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 15:44:14,797 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 15:44:14,803 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 15:44:14,805 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 15:44:14,806 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 15:44:14,808 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 15:44:14,817 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 15:44:14,819 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 15:44:14,820 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 15:44:14,823 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 15:44:14,824 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 15:44:14,828 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 15:44:14,828 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 15:44:14,829 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 15:44:14,831 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 15:44:14,831 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 15:44:14,833 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 15:44:14,833 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 15:44:14,834 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 15:44:14,836 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 15:44:14,837 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 15:44:14,838 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 15:44:14,839 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 15:44:14,839 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 15:44:14,839 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 15:44:14,840 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 15:44:14,841 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 15:44:14,841 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 15:44:14,842 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-19 15:44:14,887 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 15:44:14,887 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 15:44:14,888 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 15:44:14,889 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 15:44:14,889 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 15:44:14,889 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 15:44:14,889 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 15:44:14,889 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 15:44:14,890 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 15:44:14,890 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 15:44:14,891 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 15:44:14,891 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 15:44:14,891 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 15:44:14,891 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 15:44:14,892 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 15:44:14,892 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 15:44:14,893 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 15:44:14,893 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 15:44:14,893 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 15:44:14,893 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 15:44:14,893 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 15:44:14,894 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 15:44:14,894 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 15:44:14,894 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 15:44:14,894 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 15:44:14,894 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 15:44:14,895 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 15:44:14,895 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 15:44:14,895 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:44:14,896 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 15:44:14,897 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 15:44:14,897 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 15:44:14,897 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 15:44:14,897 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 15:44:14,898 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 15:44:14,898 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 15:44:14,898 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 15:44:14,898 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_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c1be66de5de44f99e184f931232a9d8bcb0b8fd4712efbcede070913355a2c0 [2021-11-19 15:44:15,140 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 15:44:15,159 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 15:44:15,162 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 15:44:15,163 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 15:44:15,164 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 15:44:15,166 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-irda-via-ircc.cil.i [2021-11-19 15:44:15,264 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/data/d50b0b05d/e19d9b45a268450fb8a4c180067ee08a/FLAGb8edef6fb [2021-11-19 15:44:16,160 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 15:44:16,163 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-irda-via-ircc.cil.i [2021-11-19 15:44:16,247 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/data/d50b0b05d/e19d9b45a268450fb8a4c180067ee08a/FLAGb8edef6fb [2021-11-19 15:44:16,601 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/data/d50b0b05d/e19d9b45a268450fb8a4c180067ee08a [2021-11-19 15:44:16,604 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 15:44:16,607 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 15:44:16,609 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 15:44:16,609 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 15:44:16,612 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 15:44:16,613 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:44:16" (1/1) ... [2021-11-19 15:44:16,616 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39a645b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:44:16, skipping insertion in model container [2021-11-19 15:44:16,616 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:44:16" (1/1) ... [2021-11-19 15:44:16,623 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 15:44:16,771 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:44:19,624 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-irda-via-ircc.cil.i[324559,324572] [2021-11-19 15:44:19,629 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-irda-via-ircc.cil.i[324728,324741] [2021-11-19 15:44:19,638 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-irda-via-ircc.cil.i[324895,324908] [2021-11-19 15:44:19,638 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-irda-via-ircc.cil.i[325063,325076] [2021-11-19 15:44:19,659 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:44:19,686 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-19 15:44:19,687 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1ef63a5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:44:19, skipping insertion in model container [2021-11-19 15:44:19,687 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 15:44:19,688 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 15:44:19,689 INFO L158 Benchmark]: Toolchain (without parser) took 3081.61ms. Allocated memory was 102.8MB in the beginning and 127.9MB in the end (delta: 25.2MB). Free memory was 72.8MB in the beginning and 64.7MB in the end (delta: 8.1MB). Peak memory consumption was 51.1MB. Max. memory is 16.1GB. [2021-11-19 15:44:19,690 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 102.8MB. Free memory is still 78.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 15:44:19,691 INFO L158 Benchmark]: CACSL2BoogieTranslator took 3078.89ms. Allocated memory was 102.8MB in the beginning and 127.9MB in the end (delta: 25.2MB). Free memory was 72.8MB in the beginning and 64.7MB in the end (delta: 8.1MB). Peak memory consumption was 51.1MB. Max. memory is 16.1GB. [2021-11-19 15:44:19,693 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 102.8MB. Free memory is still 78.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 3078.89ms. Allocated memory was 102.8MB in the beginning and 127.9MB in the end (delta: 25.2MB). Free memory was 72.8MB in the beginning and 64.7MB in the end (delta: 8.1MB). Peak memory consumption was 51.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 7608]: 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_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-irda-via-ircc.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 6c1be66de5de44f99e184f931232a9d8bcb0b8fd4712efbcede070913355a2c0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 15:44:21,936 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 15:44:21,940 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 15:44:21,990 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 15:44:21,991 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 15:44:21,995 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 15:44:21,997 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 15:44:22,002 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 15:44:22,005 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 15:44:22,013 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 15:44:22,014 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 15:44:22,016 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 15:44:22,016 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 15:44:22,019 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 15:44:22,021 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 15:44:22,025 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 15:44:22,027 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 15:44:22,032 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 15:44:22,034 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 15:44:22,041 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 15:44:22,044 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 15:44:22,045 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 15:44:22,048 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 15:44:22,050 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 15:44:22,059 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 15:44:22,060 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 15:44:22,060 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 15:44:22,062 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 15:44:22,063 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 15:44:22,064 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 15:44:22,065 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 15:44:22,066 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 15:44:22,068 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 15:44:22,069 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 15:44:22,070 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 15:44:22,071 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 15:44:22,072 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 15:44:22,072 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 15:44:22,073 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 15:44:22,074 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 15:44:22,075 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 15:44:22,076 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-19 15:44:22,118 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 15:44:22,118 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 15:44:22,120 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 15:44:22,120 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 15:44:22,121 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 15:44:22,121 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 15:44:22,121 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 15:44:22,122 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 15:44:22,122 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 15:44:22,122 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 15:44:22,125 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 15:44:22,125 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 15:44:22,125 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 15:44:22,126 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 15:44:22,126 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 15:44:22,126 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 15:44:22,127 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 15:44:22,127 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 15:44:22,127 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 15:44:22,127 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 15:44:22,128 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 15:44:22,128 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 15:44:22,128 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 15:44:22,129 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 15:44:22,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:44:22,129 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 15:44:22,130 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 15:44:22,130 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 15:44:22,130 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 15:44:22,131 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 15:44:22,131 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 15:44:22,131 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 15:44:22,132 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 15:44:22,132 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_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c1be66de5de44f99e184f931232a9d8bcb0b8fd4712efbcede070913355a2c0 [2021-11-19 15:44:22,560 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 15:44:22,584 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 15:44:22,587 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 15:44:22,588 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 15:44:22,589 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 15:44:22,591 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-irda-via-ircc.cil.i [2021-11-19 15:44:22,661 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/data/bbedb03c8/1725b4d65ea44bdea50e3491a1fa960c/FLAG3763becbb [2021-11-19 15:44:23,722 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 15:44:23,724 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-irda-via-ircc.cil.i [2021-11-19 15:44:23,769 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/data/bbedb03c8/1725b4d65ea44bdea50e3491a1fa960c/FLAG3763becbb [2021-11-19 15:44:24,122 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/data/bbedb03c8/1725b4d65ea44bdea50e3491a1fa960c [2021-11-19 15:44:24,125 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 15:44:24,126 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 15:44:24,127 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 15:44:24,127 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 15:44:24,131 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 15:44:24,132 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:44:24" (1/1) ... [2021-11-19 15:44:24,133 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5245a1da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:44:24, skipping insertion in model container [2021-11-19 15:44:24,133 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:44:24" (1/1) ... [2021-11-19 15:44:24,140 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 15:44:24,295 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:44:27,076 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-irda-via-ircc.cil.i[324559,324572] [2021-11-19 15:44:27,079 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-irda-via-ircc.cil.i[324728,324741] [2021-11-19 15:44:27,080 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-irda-via-ircc.cil.i[324895,324908] [2021-11-19 15:44:27,081 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-irda-via-ircc.cil.i[325063,325076] [2021-11-19 15:44:27,100 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:44:27,152 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 15:44:27,215 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:44:27,607 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-irda-via-ircc.cil.i[324559,324572] [2021-11-19 15:44:27,608 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-irda-via-ircc.cil.i[324728,324741] [2021-11-19 15:44:27,608 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-irda-via-ircc.cil.i[324895,324908] [2021-11-19 15:44:27,609 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-irda-via-ircc.cil.i[325063,325076] [2021-11-19 15:44:27,614 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:44:27,642 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 15:44:28,081 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-irda-via-ircc.cil.i[324559,324572] [2021-11-19 15:44:28,081 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-irda-via-ircc.cil.i[324728,324741] [2021-11-19 15:44:28,082 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-irda-via-ircc.cil.i[324895,324908] [2021-11-19 15:44:28,082 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-irda-via-ircc.cil.i[325063,325076] [2021-11-19 15:44:28,090 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:44:28,276 INFO L208 MainTranslator]: Completed translation [2021-11-19 15:44:28,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:44:28 WrapperNode [2021-11-19 15:44:28,277 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 15:44:28,278 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 15:44:28,279 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 15:44:28,282 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 15:44:28,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:44:28" (1/1) ... [2021-11-19 15:44:28,411 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:44:28" (1/1) ... [2021-11-19 15:44:28,639 INFO L137 Inliner]: procedures = 400, calls = 2027, calls flagged for inlining = 151, calls inlined = 130, statements flattened = 3890 [2021-11-19 15:44:28,640 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 15:44:28,641 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 15:44:28,641 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 15:44:28,642 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 15:44:28,650 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:44:28" (1/1) ... [2021-11-19 15:44:28,652 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:44:28" (1/1) ... [2021-11-19 15:44:28,693 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:44:28" (1/1) ... [2021-11-19 15:44:28,697 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:44:28" (1/1) ... [2021-11-19 15:44:28,855 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:44:28" (1/1) ... [2021-11-19 15:44:28,884 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:44:28" (1/1) ... [2021-11-19 15:44:28,900 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:44:28" (1/1) ... [2021-11-19 15:44:28,927 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 15:44:28,928 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 15:44:28,928 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 15:44:28,928 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 15:44:28,929 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:44:28" (1/1) ... [2021-11-19 15:44:28,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:44:28,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:44:28,960 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 15:44:28,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 15:44:29,002 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-19 15:44:29,002 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-19 15:44:29,002 INFO L130 BoogieDeclarations]: Found specification of procedure RxCurCount [2021-11-19 15:44:29,002 INFO L138 BoogieDeclarations]: Found implementation of procedure RxCurCount [2021-11-19 15:44:29,003 INFO L130 BoogieDeclarations]: Found specification of procedure irda_setup_dma [2021-11-19 15:44:29,003 INFO L138 BoogieDeclarations]: Found implementation of procedure irda_setup_dma [2021-11-19 15:44:29,003 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-19 15:44:29,003 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-19 15:44:29,003 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-19 15:44:29,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-19 15:44:29,004 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_73 [2021-11-19 15:44:29,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_73 [2021-11-19 15:44:29,004 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2021-11-19 15:44:29,004 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2021-11-19 15:44:29,004 INFO L130 BoogieDeclarations]: Found specification of procedure CheckRegBit [2021-11-19 15:44:29,004 INFO L138 BoogieDeclarations]: Found implementation of procedure CheckRegBit [2021-11-19 15:44:29,005 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-19 15:44:29,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-19 15:44:29,005 INFO L130 BoogieDeclarations]: Found specification of procedure via_remove_one [2021-11-19 15:44:29,005 INFO L138 BoogieDeclarations]: Found implementation of procedure via_remove_one [2021-11-19 15:44:29,005 INFO L130 BoogieDeclarations]: Found specification of procedure via_ircc_change_speed [2021-11-19 15:44:29,006 INFO L138 BoogieDeclarations]: Found implementation of procedure via_ircc_change_speed [2021-11-19 15:44:29,006 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~structbegin~C_INT~structend~~TO~C_INT [2021-11-19 15:44:29,006 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~structbegin~C_INT~structend~~TO~C_INT [2021-11-19 15:44:29,006 INFO L130 BoogieDeclarations]: Found specification of procedure dma_zalloc_coherent [2021-11-19 15:44:29,006 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_zalloc_coherent [2021-11-19 15:44:29,006 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-19 15:44:29,006 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-19 15:44:29,007 INFO L130 BoogieDeclarations]: Found specification of procedure SetPulseWidth [2021-11-19 15:44:29,007 INFO L138 BoogieDeclarations]: Found implementation of procedure SetPulseWidth [2021-11-19 15:44:29,007 INFO L130 BoogieDeclarations]: Found specification of procedure Tdelay [2021-11-19 15:44:29,007 INFO L138 BoogieDeclarations]: Found implementation of procedure Tdelay [2021-11-19 15:44:29,007 INFO L130 BoogieDeclarations]: Found specification of procedure netif_rx [2021-11-19 15:44:29,008 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_rx [2021-11-19 15:44:29,008 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-19 15:44:29,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-19 15:44:29,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 15:44:29,008 INFO L130 BoogieDeclarations]: Found specification of procedure ClkTx [2021-11-19 15:44:29,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ClkTx [2021-11-19 15:44:29,009 INFO L130 BoogieDeclarations]: Found specification of procedure WriteLPCReg [2021-11-19 15:44:29,009 INFO L138 BoogieDeclarations]: Found implementation of procedure WriteLPCReg [2021-11-19 15:44:29,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 15:44:29,009 INFO L130 BoogieDeclarations]: Found specification of procedure capable [2021-11-19 15:44:29,009 INFO L138 BoogieDeclarations]: Found implementation of procedure capable [2021-11-19 15:44:29,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-19 15:44:29,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-19 15:44:29,010 INFO L130 BoogieDeclarations]: Found specification of procedure CommonInit [2021-11-19 15:44:29,010 INFO L138 BoogieDeclarations]: Found implementation of procedure CommonInit [2021-11-19 15:44:29,010 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-19 15:44:29,010 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-19 15:44:29,010 INFO L130 BoogieDeclarations]: Found specification of procedure via_ircc_change_dongle_speed [2021-11-19 15:44:29,011 INFO L138 BoogieDeclarations]: Found implementation of procedure via_ircc_change_dongle_speed [2021-11-19 15:44:29,011 INFO L130 BoogieDeclarations]: Found specification of procedure ReadLPCReg [2021-11-19 15:44:29,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadLPCReg [2021-11-19 15:44:29,011 INFO L130 BoogieDeclarations]: Found specification of procedure free_dma [2021-11-19 15:44:29,011 INFO L138 BoogieDeclarations]: Found implementation of procedure free_dma [2021-11-19 15:44:29,011 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_lock_of_via_ircc_cb [2021-11-19 15:44:29,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_lock_of_via_ircc_cb [2021-11-19 15:44:29,012 INFO L130 BoogieDeclarations]: Found specification of procedure via_ircc_dma_receive [2021-11-19 15:44:29,012 INFO L138 BoogieDeclarations]: Found implementation of procedure via_ircc_dma_receive [2021-11-19 15:44:29,012 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-19 15:44:29,016 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-19 15:44:29,016 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-19 15:44:29,017 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-19 15:44:29,017 INFO L130 BoogieDeclarations]: Found specification of procedure via_ircc_net_close [2021-11-19 15:44:29,017 INFO L138 BoogieDeclarations]: Found implementation of procedure via_ircc_net_close [2021-11-19 15:44:29,017 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-19 15:44:29,017 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-19 15:44:29,017 INFO L130 BoogieDeclarations]: Found specification of procedure CkRxRecv [2021-11-19 15:44:29,018 INFO L138 BoogieDeclarations]: Found implementation of procedure CkRxRecv [2021-11-19 15:44:29,018 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2021-11-19 15:44:29,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2021-11-19 15:44:29,018 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_err_code [2021-11-19 15:44:29,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_err_code [2021-11-19 15:44:29,018 INFO L130 BoogieDeclarations]: Found specification of procedure irda_get_next_speed [2021-11-19 15:44:29,019 INFO L138 BoogieDeclarations]: Found implementation of procedure irda_get_next_speed [2021-11-19 15:44:29,019 INFO L130 BoogieDeclarations]: Found specification of procedure ReadReg [2021-11-19 15:44:29,020 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadReg [2021-11-19 15:44:29,020 INFO L130 BoogieDeclarations]: Found specification of procedure via_ircc_open [2021-11-19 15:44:29,020 INFO L138 BoogieDeclarations]: Found implementation of procedure via_ircc_open [2021-11-19 15:44:29,020 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-19 15:44:29,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-19 15:44:29,021 INFO L130 BoogieDeclarations]: Found specification of procedure WriteRegBit [2021-11-19 15:44:29,021 INFO L138 BoogieDeclarations]: Found implementation of procedure WriteRegBit [2021-11-19 15:44:29,021 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 15:44:29,022 INFO L130 BoogieDeclarations]: Found specification of procedure Wr_Indx [2021-11-19 15:44:29,022 INFO L138 BoogieDeclarations]: Found implementation of procedure Wr_Indx [2021-11-19 15:44:29,022 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 15:44:29,022 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-19 15:44:29,022 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-19 15:44:29,022 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-19 15:44:29,023 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-19 15:44:29,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 15:44:29,023 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-19 15:44:29,023 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-19 15:44:29,023 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-19 15:44:29,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-19 15:44:29,024 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-19 15:44:29,024 INFO L130 BoogieDeclarations]: Found specification of procedure WriteReg [2021-11-19 15:44:29,024 INFO L138 BoogieDeclarations]: Found implementation of procedure WriteReg [2021-11-19 15:44:29,025 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_spin_lock [2021-11-19 15:44:29,025 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_spin_lock [2021-11-19 15:44:29,025 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-19 15:44:29,026 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-19 15:44:29,029 INFO L130 BoogieDeclarations]: Found specification of procedure SetBaudRate [2021-11-19 15:44:29,030 INFO L138 BoogieDeclarations]: Found implementation of procedure SetBaudRate [2021-11-19 15:44:29,030 INFO L130 BoogieDeclarations]: Found specification of procedure Wr_Byte [2021-11-19 15:44:29,030 INFO L138 BoogieDeclarations]: Found implementation of procedure Wr_Byte [2021-11-19 15:44:29,031 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2021-11-19 15:44:29,031 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2021-11-19 15:44:29,032 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2021-11-19 15:44:29,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2021-11-19 15:44:29,033 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-19 15:44:29,038 INFO L130 BoogieDeclarations]: Found specification of procedure via_ircc_net_open [2021-11-19 15:44:29,039 INFO L138 BoogieDeclarations]: Found implementation of procedure via_ircc_net_open [2021-11-19 15:44:29,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 15:44:29,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 15:44:29,039 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-19 15:44:29,039 INFO L130 BoogieDeclarations]: Found specification of procedure ResetChip [2021-11-19 15:44:29,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ResetChip [2021-11-19 15:44:29,040 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-19 15:44:29,040 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 15:44:29,040 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-19 15:44:29,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-19 15:44:29,040 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-19 15:44:29,040 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-19 15:44:29,040 INFO L130 BoogieDeclarations]: Found specification of procedure irda_device_txqueue_empty [2021-11-19 15:44:29,041 INFO L138 BoogieDeclarations]: Found implementation of procedure irda_device_txqueue_empty [2021-11-19 15:44:29,041 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-19 15:44:29,041 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-19 15:44:29,041 INFO L130 BoogieDeclarations]: Found specification of procedure pci_read_config_byte [2021-11-19 15:44:29,041 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_read_config_byte [2021-11-19 15:44:29,041 INFO L130 BoogieDeclarations]: Found specification of procedure Sdelay [2021-11-19 15:44:29,042 INFO L138 BoogieDeclarations]: Found implementation of procedure Sdelay [2021-11-19 15:44:29,042 INFO L130 BoogieDeclarations]: Found specification of procedure SetSIR [2021-11-19 15:44:29,042 INFO L138 BoogieDeclarations]: Found implementation of procedure SetSIR [2021-11-19 15:44:29,042 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-19 15:44:29,042 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-19 15:44:29,042 INFO L130 BoogieDeclarations]: Found specification of procedure SetMaxRxPacketSize [2021-11-19 15:44:29,042 INFO L138 BoogieDeclarations]: Found implementation of procedure SetMaxRxPacketSize [2021-11-19 15:44:29,043 INFO L130 BoogieDeclarations]: Found specification of procedure GetRecvByte [2021-11-19 15:44:29,043 INFO L138 BoogieDeclarations]: Found implementation of procedure GetRecvByte [2021-11-19 15:44:29,043 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2021-11-19 15:44:29,043 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2021-11-19 15:44:29,043 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 15:44:29,043 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 15:44:29,043 INFO L130 BoogieDeclarations]: Found specification of procedure hwreset [2021-11-19 15:44:29,044 INFO L138 BoogieDeclarations]: Found implementation of procedure hwreset [2021-11-19 15:44:29,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-19 15:44:29,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-19 15:44:29,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-19 15:44:29,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-19 15:44:29,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-19 15:44:29,044 INFO L130 BoogieDeclarations]: Found specification of procedure pci_write_config_byte [2021-11-19 15:44:29,045 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_write_config_byte [2021-11-19 15:44:29,045 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-19 15:44:29,045 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-19 15:44:29,045 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2021-11-19 15:44:29,045 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2021-11-19 15:44:29,045 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-19 15:44:29,046 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-19 15:44:29,046 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_irq [2021-11-19 15:44:29,046 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_irq [2021-11-19 15:44:29,046 INFO L130 BoogieDeclarations]: Found specification of procedure via_ircc_dma_xmit [2021-11-19 15:44:29,046 INFO L138 BoogieDeclarations]: Found implementation of procedure via_ircc_dma_xmit [2021-11-19 15:44:29,046 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reserve [2021-11-19 15:44:29,046 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reserve [2021-11-19 15:44:29,047 INFO L130 BoogieDeclarations]: Found specification of procedure dma_free_attrs [2021-11-19 15:44:29,047 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_free_attrs [2021-11-19 15:44:29,047 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-11-19 15:44:29,047 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-11-19 15:44:29,047 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-19 15:44:29,047 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-19 15:44:29,047 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~C_INT [2021-11-19 15:44:29,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~C_INT [2021-11-19 15:44:29,048 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2021-11-19 15:44:29,048 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2021-11-19 15:44:29,048 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-19 15:44:29,048 INFO L130 BoogieDeclarations]: Found specification of procedure net_ratelimit [2021-11-19 15:44:29,048 INFO L138 BoogieDeclarations]: Found implementation of procedure net_ratelimit [2021-11-19 15:44:29,048 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-19 15:44:29,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-19 15:44:29,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-19 15:44:29,049 INFO L130 BoogieDeclarations]: Found specification of procedure SetSendByte [2021-11-19 15:44:29,049 INFO L138 BoogieDeclarations]: Found implementation of procedure SetSendByte [2021-11-19 15:44:29,049 INFO L130 BoogieDeclarations]: Found specification of procedure dev_alloc_skb [2021-11-19 15:44:29,049 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_alloc_skb [2021-11-19 15:44:29,049 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-19 15:44:29,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-19 15:44:29,050 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_lock_of_via_ircc_cb [2021-11-19 15:44:29,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_lock_of_via_ircc_cb [2021-11-19 15:44:29,050 INFO L130 BoogieDeclarations]: Found specification of procedure SetSendPreambleCount [2021-11-19 15:44:29,050 INFO L138 BoogieDeclarations]: Found implementation of procedure SetSendPreambleCount [2021-11-19 15:44:29,050 INFO L130 BoogieDeclarations]: Found specification of procedure InitCard [2021-11-19 15:44:29,050 INFO L138 BoogieDeclarations]: Found implementation of procedure InitCard [2021-11-19 15:44:29,051 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-19 15:44:29,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-19 15:44:29,051 INFO L130 BoogieDeclarations]: Found specification of procedure SetTimer [2021-11-19 15:44:29,051 INFO L138 BoogieDeclarations]: Found implementation of procedure SetTimer [2021-11-19 15:44:29,051 INFO L130 BoogieDeclarations]: Found specification of procedure ActClk [2021-11-19 15:44:29,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ActClk [2021-11-19 15:44:29,107 INFO L130 BoogieDeclarations]: Found specification of procedure request_dma [2021-11-19 15:44:29,107 INFO L138 BoogieDeclarations]: Found implementation of procedure request_dma [2021-11-19 15:44:29,107 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2021-11-19 15:44:29,107 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2021-11-19 15:44:29,107 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reset_mac_header [2021-11-19 15:44:29,107 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reset_mac_header [2021-11-19 15:44:29,107 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-19 15:44:29,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-19 15:44:29,108 INFO L130 BoogieDeclarations]: Found specification of procedure skb_copy_to_linear_data [2021-11-19 15:44:29,108 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_copy_to_linear_data [2021-11-19 15:44:29,905 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 15:44:29,909 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 15:44:30,303 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-19 15:45:08,342 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 15:45:08,362 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 15:45:08,362 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-19 15:45:08,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:45:08 BoogieIcfgContainer [2021-11-19 15:45:08,367 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 15:45:08,369 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 15:45:08,369 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 15:45:08,372 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 15:45:08,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 03:44:24" (1/3) ... [2021-11-19 15:45:08,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d347373 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:45:08, skipping insertion in model container [2021-11-19 15:45:08,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:44:28" (2/3) ... [2021-11-19 15:45:08,374 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d347373 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:45:08, skipping insertion in model container [2021-11-19 15:45:08,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:45:08" (3/3) ... [2021-11-19 15:45:08,375 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_linux-kernel-locking-spinlock_drivers-net-irda-via-ircc.cil.i [2021-11-19 15:45:08,381 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 15:45:08,381 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-19 15:45:08,448 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 15:45:08,455 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 15:45:08,455 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-19 15:45:08,519 INFO L276 IsEmpty]: Start isEmpty. Operand has 1819 states, 1090 states have (on average 1.255045871559633) internal successors, (1368), 1123 states have internal predecessors, (1368), 635 states have call successors, (635), 91 states have call predecessors, (635), 90 states have return successors, (632), 620 states have call predecessors, (632), 632 states have call successors, (632) [2021-11-19 15:45:08,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-19 15:45:08,526 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:08,527 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:45:08,528 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 15:45:08,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:08,533 INFO L85 PathProgramCache]: Analyzing trace with hash 138977870, now seen corresponding path program 1 times [2021-11-19 15:45:08,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:08,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [794971293] [2021-11-19 15:45:08,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:45:08,549 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:08,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:08,557 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:08,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 15:45:09,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:45:09,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 1119 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:45:09,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:10,241 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 15:45:10,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:10,686 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 15:45:10,687 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:10,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [794971293] [2021-11-19 15:45:10,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [794971293] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:45:10,688 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:45:10,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 7 [2021-11-19 15:45:10,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407569672] [2021-11-19 15:45:10,691 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:10,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 15:45:10,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:10,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 15:45:10,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:45:10,739 INFO L87 Difference]: Start difference. First operand has 1819 states, 1090 states have (on average 1.255045871559633) internal successors, (1368), 1123 states have internal predecessors, (1368), 635 states have call successors, (635), 91 states have call predecessors, (635), 90 states have return successors, (632), 620 states have call predecessors, (632), 632 states have call successors, (632) Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-19 15:45:11,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:11,413 INFO L93 Difference]: Finished difference Result 3611 states and 5273 transitions. [2021-11-19 15:45:11,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:45:11,416 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 51 [2021-11-19 15:45:11,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:11,450 INFO L225 Difference]: With dead ends: 3611 [2021-11-19 15:45:11,450 INFO L226 Difference]: Without dead ends: 1811 [2021-11-19 15:45:11,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:45:11,476 INFO L933 BasicCegarLoop]: 2624 mSDtfsCounter, 2583 mSDsluCounter, 10467 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2597 SdHoareTripleChecker+Valid, 13091 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:11,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2597 Valid, 13091 Invalid, 41 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 15:45:11,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1811 states. [2021-11-19 15:45:11,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1811 to 1811. [2021-11-19 15:45:11,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1811 states, 1086 states have (on average 1.2504604051565378) internal successors, (1358), 1119 states have internal predecessors, (1358), 632 states have call successors, (632), 91 states have call predecessors, (632), 90 states have return successors, (629), 617 states have call predecessors, (629), 629 states have call successors, (629) [2021-11-19 15:45:11,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1811 states to 1811 states and 2619 transitions. [2021-11-19 15:45:11,780 INFO L78 Accepts]: Start accepts. Automaton has 1811 states and 2619 transitions. Word has length 51 [2021-11-19 15:45:11,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:11,781 INFO L470 AbstractCegarLoop]: Abstraction has 1811 states and 2619 transitions. [2021-11-19 15:45:11,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-19 15:45:11,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1811 states and 2619 transitions. [2021-11-19 15:45:11,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-19 15:45:11,785 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:11,786 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:45:11,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:12,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:45:12,009 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 15:45:12,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:12,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1457883714, now seen corresponding path program 1 times [2021-11-19 15:45:12,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:12,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [415512546] [2021-11-19 15:45:12,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:45:12,015 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:12,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:12,018 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:12,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 15:45:12,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:45:12,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 1126 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:45:12,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:13,512 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 15:45:13,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:13,883 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 15:45:13,883 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:13,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [415512546] [2021-11-19 15:45:13,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [415512546] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:45:13,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:45:13,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-19 15:45:13,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314633477] [2021-11-19 15:45:13,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:13,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:45:13,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:13,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:45:13,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:45:13,888 INFO L87 Difference]: Start difference. First operand 1811 states and 2619 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 15:45:14,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:14,303 INFO L93 Difference]: Finished difference Result 1817 states and 2624 transitions. [2021-11-19 15:45:14,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:45:14,304 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 56 [2021-11-19 15:45:14,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:14,323 INFO L225 Difference]: With dead ends: 1817 [2021-11-19 15:45:14,324 INFO L226 Difference]: Without dead ends: 1815 [2021-11-19 15:45:14,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:45:14,328 INFO L933 BasicCegarLoop]: 2616 mSDtfsCounter, 2583 mSDsluCounter, 5211 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2595 SdHoareTripleChecker+Valid, 7827 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:14,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2595 Valid, 7827 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:45:14,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1815 states. [2021-11-19 15:45:14,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1815 to 1815. [2021-11-19 15:45:14,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1815 states, 1089 states have (on average 1.2497704315886133) internal successors, (1361), 1122 states have internal predecessors, (1361), 632 states have call successors, (632), 92 states have call predecessors, (632), 91 states have return successors, (629), 617 states have call predecessors, (629), 629 states have call successors, (629) [2021-11-19 15:45:14,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1815 states to 1815 states and 2622 transitions. [2021-11-19 15:45:14,572 INFO L78 Accepts]: Start accepts. Automaton has 1815 states and 2622 transitions. Word has length 56 [2021-11-19 15:45:14,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:14,573 INFO L470 AbstractCegarLoop]: Abstraction has 1815 states and 2622 transitions. [2021-11-19 15:45:14,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 15:45:14,574 INFO L276 IsEmpty]: Start isEmpty. Operand 1815 states and 2622 transitions. [2021-11-19 15:45:14,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-19 15:45:14,577 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:14,578 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:45:14,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:14,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:45:14,793 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 15:45:14,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:14,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1330618354, now seen corresponding path program 1 times [2021-11-19 15:45:14,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:14,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1352203836] [2021-11-19 15:45:14,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:45:14,796 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:14,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:14,798 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:14,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 15:45:15,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:45:15,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 1133 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:45:15,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:16,149 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 15:45:16,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:16,518 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 15:45:16,519 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:16,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1352203836] [2021-11-19 15:45:16,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1352203836] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:45:16,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:45:16,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-19 15:45:16,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059548776] [2021-11-19 15:45:16,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:16,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:45:16,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:16,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:45:16,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:45:16,522 INFO L87 Difference]: Start difference. First operand 1815 states and 2622 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-19 15:45:16,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:16,923 INFO L93 Difference]: Finished difference Result 1821 states and 2627 transitions. [2021-11-19 15:45:16,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:45:16,924 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2021-11-19 15:45:16,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:16,952 INFO L225 Difference]: With dead ends: 1821 [2021-11-19 15:45:16,952 INFO L226 Difference]: Without dead ends: 1819 [2021-11-19 15:45:16,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:45:16,957 INFO L933 BasicCegarLoop]: 2616 mSDtfsCounter, 2583 mSDsluCounter, 5211 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2594 SdHoareTripleChecker+Valid, 7827 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:16,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2594 Valid, 7827 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:45:16,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1819 states. [2021-11-19 15:45:17,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1819 to 1819. [2021-11-19 15:45:17,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1819 states, 1092 states have (on average 1.249084249084249) internal successors, (1364), 1125 states have internal predecessors, (1364), 632 states have call successors, (632), 93 states have call predecessors, (632), 92 states have return successors, (629), 617 states have call predecessors, (629), 629 states have call successors, (629) [2021-11-19 15:45:17,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 2625 transitions. [2021-11-19 15:45:17,150 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 2625 transitions. Word has length 61 [2021-11-19 15:45:17,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:17,151 INFO L470 AbstractCegarLoop]: Abstraction has 1819 states and 2625 transitions. [2021-11-19 15:45:17,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-19 15:45:17,151 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 2625 transitions. [2021-11-19 15:45:17,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-19 15:45:17,159 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:17,159 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:45:17,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:17,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:45:17,373 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 15:45:17,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:17,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1915648428, now seen corresponding path program 1 times [2021-11-19 15:45:17,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:17,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [547600685] [2021-11-19 15:45:17,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:45:17,376 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:17,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:17,379 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:17,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 15:45:18,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:45:18,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 1172 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 15:45:18,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:19,036 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 15:45:19,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:20,558 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 15:45:20,558 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:20,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [547600685] [2021-11-19 15:45:20,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [547600685] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:45:20,558 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:45:20,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12, 12] imperfect sequences [] total 21 [2021-11-19 15:45:20,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103500205] [2021-11-19 15:45:20,559 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:20,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 15:45:20,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:20,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 15:45:20,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-11-19 15:45:20,561 INFO L87 Difference]: Start difference. First operand 1819 states and 2625 transitions. Second operand has 21 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 8 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-11-19 15:45:23,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:23,699 INFO L93 Difference]: Finished difference Result 1874 states and 2695 transitions. [2021-11-19 15:45:23,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 15:45:23,700 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 8 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) Word has length 75 [2021-11-19 15:45:23,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:23,721 INFO L225 Difference]: With dead ends: 1874 [2021-11-19 15:45:23,721 INFO L226 Difference]: Without dead ends: 1831 [2021-11-19 15:45:23,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-11-19 15:45:23,725 INFO L933 BasicCegarLoop]: 2585 mSDtfsCounter, 35 mSDsluCounter, 33516 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 36101 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:23,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 36101 Invalid, 590 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [39 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-19 15:45:23,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1831 states. [2021-11-19 15:45:23,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1831 to 1827. [2021-11-19 15:45:23,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1827 states, 1098 states have (on average 1.2477231329690346) internal successors, (1370), 1131 states have internal predecessors, (1370), 634 states have call successors, (634), 93 states have call predecessors, (634), 92 states have return successors, (631), 619 states have call predecessors, (631), 631 states have call successors, (631) [2021-11-19 15:45:23,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1827 states to 1827 states and 2635 transitions. [2021-11-19 15:45:23,877 INFO L78 Accepts]: Start accepts. Automaton has 1827 states and 2635 transitions. Word has length 75 [2021-11-19 15:45:23,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:23,878 INFO L470 AbstractCegarLoop]: Abstraction has 1827 states and 2635 transitions. [2021-11-19 15:45:23,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 8 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-11-19 15:45:23,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1827 states and 2635 transitions. [2021-11-19 15:45:23,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-19 15:45:23,882 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:23,882 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:45:23,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:24,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:45:24,097 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 15:45:24,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:24,097 INFO L85 PathProgramCache]: Analyzing trace with hash -186810498, now seen corresponding path program 1 times [2021-11-19 15:45:24,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:24,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [927564423] [2021-11-19 15:45:24,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:45:24,098 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:24,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:24,099 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:24,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 15:45:24,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:45:24,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 1140 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:45:24,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:25,430 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 15:45:25,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:25,812 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 15:45:25,813 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:25,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [927564423] [2021-11-19 15:45:25,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [927564423] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:45:25,813 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:45:25,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-19 15:45:25,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314866817] [2021-11-19 15:45:25,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:25,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:45:25,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:25,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:45:25,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:45:25,815 INFO L87 Difference]: Start difference. First operand 1827 states and 2635 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 15:45:26,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:26,185 INFO L93 Difference]: Finished difference Result 1833 states and 2640 transitions. [2021-11-19 15:45:26,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:45:26,186 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 66 [2021-11-19 15:45:26,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:26,205 INFO L225 Difference]: With dead ends: 1833 [2021-11-19 15:45:26,205 INFO L226 Difference]: Without dead ends: 1831 [2021-11-19 15:45:26,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:45:26,208 INFO L933 BasicCegarLoop]: 2616 mSDtfsCounter, 2583 mSDsluCounter, 5211 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2593 SdHoareTripleChecker+Valid, 7827 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:26,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2593 Valid, 7827 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:45:26,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1831 states. [2021-11-19 15:45:26,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1831 to 1831. [2021-11-19 15:45:26,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1831 states, 1101 states have (on average 1.2470481380563125) internal successors, (1373), 1134 states have internal predecessors, (1373), 634 states have call successors, (634), 94 states have call predecessors, (634), 93 states have return successors, (631), 619 states have call predecessors, (631), 631 states have call successors, (631) [2021-11-19 15:45:26,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1831 states to 1831 states and 2638 transitions. [2021-11-19 15:45:26,355 INFO L78 Accepts]: Start accepts. Automaton has 1831 states and 2638 transitions. Word has length 66 [2021-11-19 15:45:26,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:26,356 INFO L470 AbstractCegarLoop]: Abstraction has 1831 states and 2638 transitions. [2021-11-19 15:45:26,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 15:45:26,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1831 states and 2638 transitions. [2021-11-19 15:45:26,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-19 15:45:26,357 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:26,358 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:45:26,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:26,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:45:26,573 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 15:45:26,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:26,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1901975888, now seen corresponding path program 1 times [2021-11-19 15:45:26,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:26,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1845441179] [2021-11-19 15:45:26,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:45:26,574 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:26,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:26,575 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:26,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 15:45:27,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:45:27,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 1147 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 15:45:27,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:27,942 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-19 15:45:27,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:28,669 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 15:45:28,669 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:28,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1845441179] [2021-11-19 15:45:28,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1845441179] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:45:28,669 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:45:28,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12, 12] imperfect sequences [] total 15 [2021-11-19 15:45:28,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796112443] [2021-11-19 15:45:28,670 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:28,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-19 15:45:28,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:28,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-19 15:45:28,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-11-19 15:45:28,671 INFO L87 Difference]: Start difference. First operand 1831 states and 2638 transitions. Second operand has 15 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 6 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-11-19 15:45:30,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:30,718 INFO L93 Difference]: Finished difference Result 1871 states and 2687 transitions. [2021-11-19 15:45:30,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 15:45:30,720 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 6 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 71 [2021-11-19 15:45:30,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:30,738 INFO L225 Difference]: With dead ends: 1871 [2021-11-19 15:45:30,739 INFO L226 Difference]: Without dead ends: 1833 [2021-11-19 15:45:30,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-11-19 15:45:30,742 INFO L933 BasicCegarLoop]: 2591 mSDtfsCounter, 73 mSDsluCounter, 28376 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 30967 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:30,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 30967 Invalid, 466 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [24 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-19 15:45:30,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1833 states. [2021-11-19 15:45:30,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1833 to 1831. [2021-11-19 15:45:30,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1831 states, 1101 states have (on average 1.24613987284287) internal successors, (1372), 1134 states have internal predecessors, (1372), 634 states have call successors, (634), 94 states have call predecessors, (634), 93 states have return successors, (631), 619 states have call predecessors, (631), 631 states have call successors, (631) [2021-11-19 15:45:30,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1831 states to 1831 states and 2637 transitions. [2021-11-19 15:45:30,905 INFO L78 Accepts]: Start accepts. Automaton has 1831 states and 2637 transitions. Word has length 71 [2021-11-19 15:45:30,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:30,906 INFO L470 AbstractCegarLoop]: Abstraction has 1831 states and 2637 transitions. [2021-11-19 15:45:30,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 6 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-11-19 15:45:30,906 INFO L276 IsEmpty]: Start isEmpty. Operand 1831 states and 2637 transitions. [2021-11-19 15:45:30,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-19 15:45:30,909 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:30,909 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:45:30,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:31,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:45:31,125 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 15:45:31,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:31,125 INFO L85 PathProgramCache]: Analyzing trace with hash 889808670, now seen corresponding path program 1 times [2021-11-19 15:45:31,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:31,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1948110255] [2021-11-19 15:45:31,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:45:31,126 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:31,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:31,127 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:31,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 15:45:31,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:45:31,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 1179 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 15:45:31,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:32,438 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-19 15:45:32,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:32,754 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 15:45:32,754 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:32,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1948110255] [2021-11-19 15:45:32,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1948110255] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:45:32,755 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:45:32,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 15:45:32,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530260444] [2021-11-19 15:45:32,755 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:32,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 15:45:32,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:32,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 15:45:32,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 15:45:32,756 INFO L87 Difference]: Start difference. First operand 1831 states and 2637 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-19 15:45:33,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:33,601 INFO L93 Difference]: Finished difference Result 5449 states and 7909 transitions. [2021-11-19 15:45:33,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 15:45:33,602 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 80 [2021-11-19 15:45:33,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:33,648 INFO L225 Difference]: With dead ends: 5449 [2021-11-19 15:45:33,649 INFO L226 Difference]: Without dead ends: 3639 [2021-11-19 15:45:33,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 15:45:33,678 INFO L933 BasicCegarLoop]: 3519 mSDtfsCounter, 2574 mSDsluCounter, 2516 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2574 SdHoareTripleChecker+Valid, 6035 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:33,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2574 Valid, 6035 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 15:45:33,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3639 states. [2021-11-19 15:45:34,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3639 to 3590. [2021-11-19 15:45:34,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3590 states, 2155 states have (on average 1.2310904872389792) internal successors, (2653), 2218 states have internal predecessors, (2653), 1251 states have call successors, (1251), 182 states have call predecessors, (1251), 181 states have return successors, (1274), 1223 states have call predecessors, (1274), 1248 states have call successors, (1274) [2021-11-19 15:45:34,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3590 states to 3590 states and 5178 transitions. [2021-11-19 15:45:34,119 INFO L78 Accepts]: Start accepts. Automaton has 3590 states and 5178 transitions. Word has length 80 [2021-11-19 15:45:34,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:34,121 INFO L470 AbstractCegarLoop]: Abstraction has 3590 states and 5178 transitions. [2021-11-19 15:45:34,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-19 15:45:34,123 INFO L276 IsEmpty]: Start isEmpty. Operand 3590 states and 5178 transitions. [2021-11-19 15:45:34,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-19 15:45:34,125 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:34,125 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:45:34,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:34,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:45:34,341 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 15:45:34,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:34,341 INFO L85 PathProgramCache]: Analyzing trace with hash -364405298, now seen corresponding path program 1 times [2021-11-19 15:45:34,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:34,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1822122800] [2021-11-19 15:45:34,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:45:34,343 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:34,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:34,343 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:34,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 15:45:35,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:45:35,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 1147 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:45:35,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:35,691 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 15:45:35,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:36,094 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 15:45:36,094 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:36,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1822122800] [2021-11-19 15:45:36,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1822122800] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:45:36,094 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:45:36,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-19 15:45:36,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882384538] [2021-11-19 15:45:36,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:36,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:45:36,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:36,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:45:36,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:45:36,096 INFO L87 Difference]: Start difference. First operand 3590 states and 5178 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 15:45:36,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:36,574 INFO L93 Difference]: Finished difference Result 3596 states and 5183 transitions. [2021-11-19 15:45:36,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:45:36,575 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 71 [2021-11-19 15:45:36,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:36,607 INFO L225 Difference]: With dead ends: 3596 [2021-11-19 15:45:36,607 INFO L226 Difference]: Without dead ends: 3594 [2021-11-19 15:45:36,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:45:36,611 INFO L933 BasicCegarLoop]: 2616 mSDtfsCounter, 2583 mSDsluCounter, 5211 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2592 SdHoareTripleChecker+Valid, 7827 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:36,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2592 Valid, 7827 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:45:36,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3594 states. [2021-11-19 15:45:36,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3594 to 3594. [2021-11-19 15:45:36,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3594 states, 2158 states have (on average 1.2307692307692308) internal successors, (2656), 2221 states have internal predecessors, (2656), 1251 states have call successors, (1251), 183 states have call predecessors, (1251), 182 states have return successors, (1274), 1223 states have call predecessors, (1274), 1248 states have call successors, (1274) [2021-11-19 15:45:36,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3594 states to 3594 states and 5181 transitions. [2021-11-19 15:45:36,944 INFO L78 Accepts]: Start accepts. Automaton has 3594 states and 5181 transitions. Word has length 71 [2021-11-19 15:45:36,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:36,945 INFO L470 AbstractCegarLoop]: Abstraction has 3594 states and 5181 transitions. [2021-11-19 15:45:36,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 15:45:36,945 INFO L276 IsEmpty]: Start isEmpty. Operand 3594 states and 5181 transitions. [2021-11-19 15:45:36,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-19 15:45:36,947 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:36,947 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:45:36,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:37,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:45:37,161 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 15:45:37,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:37,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1963763536, now seen corresponding path program 1 times [2021-11-19 15:45:37,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:37,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [731996180] [2021-11-19 15:45:37,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:45:37,163 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:37,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:37,164 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:37,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 15:45:37,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:45:37,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 1186 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:45:37,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:38,556 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-19 15:45:38,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:38,998 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-19 15:45:38,998 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:38,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [731996180] [2021-11-19 15:45:38,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [731996180] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:45:38,998 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:45:38,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-19 15:45:38,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910027824] [2021-11-19 15:45:38,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:38,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:45:38,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:39,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:45:39,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:45:39,000 INFO L87 Difference]: Start difference. First operand 3594 states and 5181 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 15:45:39,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:39,434 INFO L93 Difference]: Finished difference Result 3600 states and 5186 transitions. [2021-11-19 15:45:39,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:45:39,435 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 85 [2021-11-19 15:45:39,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:39,470 INFO L225 Difference]: With dead ends: 3600 [2021-11-19 15:45:39,470 INFO L226 Difference]: Without dead ends: 3598 [2021-11-19 15:45:39,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:45:39,476 INFO L933 BasicCegarLoop]: 2616 mSDtfsCounter, 2574 mSDsluCounter, 5211 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2582 SdHoareTripleChecker+Valid, 7827 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:39,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2582 Valid, 7827 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:45:39,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3598 states. [2021-11-19 15:45:39,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3598 to 3598. [2021-11-19 15:45:39,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3598 states, 2161 states have (on average 1.2304488662656177) internal successors, (2659), 2224 states have internal predecessors, (2659), 1251 states have call successors, (1251), 184 states have call predecessors, (1251), 183 states have return successors, (1274), 1223 states have call predecessors, (1274), 1248 states have call successors, (1274) [2021-11-19 15:45:39,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3598 states to 3598 states and 5184 transitions. [2021-11-19 15:45:39,859 INFO L78 Accepts]: Start accepts. Automaton has 3598 states and 5184 transitions. Word has length 85 [2021-11-19 15:45:39,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:39,860 INFO L470 AbstractCegarLoop]: Abstraction has 3598 states and 5184 transitions. [2021-11-19 15:45:39,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 15:45:39,860 INFO L276 IsEmpty]: Start isEmpty. Operand 3598 states and 5184 transitions. [2021-11-19 15:45:39,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-19 15:45:39,863 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:39,863 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:45:39,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:40,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:45:40,081 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 15:45:40,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:40,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1615963250, now seen corresponding path program 1 times [2021-11-19 15:45:40,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:40,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1875822190] [2021-11-19 15:45:40,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:45:40,082 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:40,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:40,083 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:40,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 15:45:40,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:45:40,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 1161 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:45:40,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:41,424 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-19 15:45:41,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:41,820 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-19 15:45:41,820 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:41,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1875822190] [2021-11-19 15:45:41,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1875822190] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:45:41,820 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:45:41,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-19 15:45:41,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271670557] [2021-11-19 15:45:41,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:41,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:45:41,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:41,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:45:41,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:45:41,822 INFO L87 Difference]: Start difference. First operand 3598 states and 5184 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-19 15:45:42,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:42,313 INFO L93 Difference]: Finished difference Result 3604 states and 5189 transitions. [2021-11-19 15:45:42,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:45:42,313 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 81 [2021-11-19 15:45:42,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:42,364 INFO L225 Difference]: With dead ends: 3604 [2021-11-19 15:45:42,364 INFO L226 Difference]: Without dead ends: 3602 [2021-11-19 15:45:42,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:45:42,368 INFO L933 BasicCegarLoop]: 2616 mSDtfsCounter, 2583 mSDsluCounter, 5211 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2590 SdHoareTripleChecker+Valid, 7827 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:42,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2590 Valid, 7827 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:45:42,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3602 states. [2021-11-19 15:45:42,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3602 to 3602. [2021-11-19 15:45:42,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3602 states, 2164 states have (on average 1.2301293900184842) internal successors, (2662), 2227 states have internal predecessors, (2662), 1251 states have call successors, (1251), 185 states have call predecessors, (1251), 184 states have return successors, (1274), 1223 states have call predecessors, (1274), 1248 states have call successors, (1274) [2021-11-19 15:45:42,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3602 states to 3602 states and 5187 transitions. [2021-11-19 15:45:42,728 INFO L78 Accepts]: Start accepts. Automaton has 3602 states and 5187 transitions. Word has length 81 [2021-11-19 15:45:42,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:42,728 INFO L470 AbstractCegarLoop]: Abstraction has 3602 states and 5187 transitions. [2021-11-19 15:45:42,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-19 15:45:42,729 INFO L276 IsEmpty]: Start isEmpty. Operand 3602 states and 5187 transitions. [2021-11-19 15:45:42,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-19 15:45:42,731 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:42,732 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:45:42,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:42,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:45:42,956 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 15:45:42,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:42,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1402485744, now seen corresponding path program 1 times [2021-11-19 15:45:42,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:42,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1701821548] [2021-11-19 15:45:42,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:45:42,958 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:42,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:42,959 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:42,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 15:45:43,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:45:43,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 1200 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:45:43,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:44,422 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-19 15:45:44,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:44,866 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-19 15:45:44,866 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:44,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1701821548] [2021-11-19 15:45:44,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1701821548] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:45:44,866 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:45:44,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-19 15:45:44,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441486385] [2021-11-19 15:45:44,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:44,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:45:44,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:44,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:45:44,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:45:44,869 INFO L87 Difference]: Start difference. First operand 3602 states and 5187 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 15:45:45,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:45,349 INFO L93 Difference]: Finished difference Result 3608 states and 5192 transitions. [2021-11-19 15:45:45,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:45:45,350 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 95 [2021-11-19 15:45:45,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:45,373 INFO L225 Difference]: With dead ends: 3608 [2021-11-19 15:45:45,373 INFO L226 Difference]: Without dead ends: 3606 [2021-11-19 15:45:45,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:45:45,378 INFO L933 BasicCegarLoop]: 2616 mSDtfsCounter, 2574 mSDsluCounter, 5211 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2580 SdHoareTripleChecker+Valid, 7827 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:45,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2580 Valid, 7827 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:45:45,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3606 states. [2021-11-19 15:45:45,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3606 to 3606. [2021-11-19 15:45:45,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3606 states, 2167 states have (on average 1.2298107983387172) internal successors, (2665), 2230 states have internal predecessors, (2665), 1251 states have call successors, (1251), 186 states have call predecessors, (1251), 185 states have return successors, (1274), 1223 states have call predecessors, (1274), 1248 states have call successors, (1274) [2021-11-19 15:45:45,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3606 states to 3606 states and 5190 transitions. [2021-11-19 15:45:45,767 INFO L78 Accepts]: Start accepts. Automaton has 3606 states and 5190 transitions. Word has length 95 [2021-11-19 15:45:45,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:45,768 INFO L470 AbstractCegarLoop]: Abstraction has 3606 states and 5190 transitions. [2021-11-19 15:45:45,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 15:45:45,768 INFO L276 IsEmpty]: Start isEmpty. Operand 3606 states and 5190 transitions. [2021-11-19 15:45:45,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-19 15:45:45,770 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:45,770 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:45:45,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:45,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:45:45,993 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 15:45:45,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:45,993 INFO L85 PathProgramCache]: Analyzing trace with hash -209413810, now seen corresponding path program 1 times [2021-11-19 15:45:45,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:45,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [678069831] [2021-11-19 15:45:45,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:45:45,994 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:45,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:45,995 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:45,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 15:45:46,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:45:46,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 1175 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:45:46,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:47,373 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-11-19 15:45:47,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:47,789 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-11-19 15:45:47,790 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:47,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [678069831] [2021-11-19 15:45:47,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [678069831] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:45:47,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:45:47,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-19 15:45:47,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227740146] [2021-11-19 15:45:47,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:47,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:45:47,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:47,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:45:47,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:45:47,792 INFO L87 Difference]: Start difference. First operand 3606 states and 5190 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 15:45:48,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:48,395 INFO L93 Difference]: Finished difference Result 4850 states and 7026 transitions. [2021-11-19 15:45:48,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:45:48,396 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 91 [2021-11-19 15:45:48,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:48,428 INFO L225 Difference]: With dead ends: 4850 [2021-11-19 15:45:48,428 INFO L226 Difference]: Without dead ends: 4848 [2021-11-19 15:45:48,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:45:48,434 INFO L933 BasicCegarLoop]: 3437 mSDtfsCounter, 1890 mSDsluCounter, 8461 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1895 SdHoareTripleChecker+Valid, 11898 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:48,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1895 Valid, 11898 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:45:48,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4848 states. [2021-11-19 15:45:48,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4848 to 4848. [2021-11-19 15:45:48,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4848 states, 2826 states have (on average 1.2292993630573248) internal successors, (3474), 2901 states have internal predecessors, (3474), 1763 states have call successors, (1763), 257 states have call predecessors, (1763), 256 states have return successors, (1787), 1729 states have call predecessors, (1787), 1760 states have call successors, (1787) [2021-11-19 15:45:48,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4848 states to 4848 states and 7024 transitions. [2021-11-19 15:45:48,947 INFO L78 Accepts]: Start accepts. Automaton has 4848 states and 7024 transitions. Word has length 91 [2021-11-19 15:45:48,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:48,948 INFO L470 AbstractCegarLoop]: Abstraction has 4848 states and 7024 transitions. [2021-11-19 15:45:48,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 15:45:48,948 INFO L276 IsEmpty]: Start isEmpty. Operand 4848 states and 7024 transitions. [2021-11-19 15:45:48,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-19 15:45:48,950 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:48,950 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:45:48,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:49,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:45:49,173 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 15:45:49,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:49,173 INFO L85 PathProgramCache]: Analyzing trace with hash 145333438, now seen corresponding path program 1 times [2021-11-19 15:45:49,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:49,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [500222344] [2021-11-19 15:45:49,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:45:49,175 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:49,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:49,178 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:49,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 15:45:50,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:45:50,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 1182 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:45:50,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:50,841 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-19 15:45:50,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:51,270 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-19 15:45:51,270 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:51,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [500222344] [2021-11-19 15:45:51,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [500222344] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:45:51,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:45:51,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-19 15:45:51,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146394247] [2021-11-19 15:45:51,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:51,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:45:51,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:51,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:45:51,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:45:51,272 INFO L87 Difference]: Start difference. First operand 4848 states and 7024 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 15:45:51,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:51,771 INFO L93 Difference]: Finished difference Result 4854 states and 7029 transitions. [2021-11-19 15:45:51,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:45:51,772 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 96 [2021-11-19 15:45:51,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:51,797 INFO L225 Difference]: With dead ends: 4854 [2021-11-19 15:45:51,798 INFO L226 Difference]: Without dead ends: 4852 [2021-11-19 15:45:51,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:45:51,803 INFO L933 BasicCegarLoop]: 2616 mSDtfsCounter, 2583 mSDsluCounter, 5211 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2587 SdHoareTripleChecker+Valid, 7827 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:51,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2587 Valid, 7827 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:45:51,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4852 states. [2021-11-19 15:45:52,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4852 to 4852. [2021-11-19 15:45:52,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4852 states, 2829 states have (on average 1.2290562036055144) internal successors, (3477), 2904 states have internal predecessors, (3477), 1763 states have call successors, (1763), 258 states have call predecessors, (1763), 257 states have return successors, (1787), 1729 states have call predecessors, (1787), 1760 states have call successors, (1787) [2021-11-19 15:45:52,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4852 states to 4852 states and 7027 transitions. [2021-11-19 15:45:52,408 INFO L78 Accepts]: Start accepts. Automaton has 4852 states and 7027 transitions. Word has length 96 [2021-11-19 15:45:52,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:52,409 INFO L470 AbstractCegarLoop]: Abstraction has 4852 states and 7027 transitions. [2021-11-19 15:45:52,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 15:45:52,410 INFO L276 IsEmpty]: Start isEmpty. Operand 4852 states and 7027 transitions. [2021-11-19 15:45:52,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-19 15:45:52,412 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:52,412 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:45:52,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:52,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:45:52,638 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 15:45:52,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:52,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1782967260, now seen corresponding path program 1 times [2021-11-19 15:45:52,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:52,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [739185669] [2021-11-19 15:45:52,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:45:52,639 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:52,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:52,640 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:52,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 15:45:53,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:45:53,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 1221 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:45:53,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:54,131 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-19 15:45:54,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:54,603 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-19 15:45:54,604 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:54,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [739185669] [2021-11-19 15:45:54,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [739185669] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:45:54,604 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:45:54,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-19 15:45:54,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359835375] [2021-11-19 15:45:54,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:54,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:45:54,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:54,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:45:54,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:45:54,606 INFO L87 Difference]: Start difference. First operand 4852 states and 7027 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 15:45:55,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:55,042 INFO L93 Difference]: Finished difference Result 4858 states and 7032 transitions. [2021-11-19 15:45:55,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:45:55,043 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 110 [2021-11-19 15:45:55,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:55,072 INFO L225 Difference]: With dead ends: 4858 [2021-11-19 15:45:55,072 INFO L226 Difference]: Without dead ends: 4856 [2021-11-19 15:45:55,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:45:55,078 INFO L933 BasicCegarLoop]: 2616 mSDtfsCounter, 2574 mSDsluCounter, 5211 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2577 SdHoareTripleChecker+Valid, 7827 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:55,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2577 Valid, 7827 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:45:55,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4856 states. [2021-11-19 15:45:55,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4856 to 4856. [2021-11-19 15:45:55,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4856 states, 2832 states have (on average 1.228813559322034) internal successors, (3480), 2907 states have internal predecessors, (3480), 1763 states have call successors, (1763), 259 states have call predecessors, (1763), 258 states have return successors, (1787), 1729 states have call predecessors, (1787), 1760 states have call successors, (1787) [2021-11-19 15:45:55,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4856 states to 4856 states and 7030 transitions. [2021-11-19 15:45:55,678 INFO L78 Accepts]: Start accepts. Automaton has 4856 states and 7030 transitions. Word has length 110 [2021-11-19 15:45:55,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:55,679 INFO L470 AbstractCegarLoop]: Abstraction has 4856 states and 7030 transitions. [2021-11-19 15:45:55,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 15:45:55,679 INFO L276 IsEmpty]: Start isEmpty. Operand 4856 states and 7030 transitions. [2021-11-19 15:45:55,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-19 15:45:55,682 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:55,682 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:45:55,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:55,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:45:55,897 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 15:45:55,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:55,897 INFO L85 PathProgramCache]: Analyzing trace with hash -827414914, now seen corresponding path program 1 times [2021-11-19 15:45:55,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:55,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [160499764] [2021-11-19 15:45:55,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:45:55,899 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:55,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:55,900 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:55,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 15:45:56,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:45:56,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 1196 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:45:56,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:45:57,559 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-11-19 15:45:57,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:45:58,028 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-11-19 15:45:58,028 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:45:58,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [160499764] [2021-11-19 15:45:58,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [160499764] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:45:58,029 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:45:58,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-19 15:45:58,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926201389] [2021-11-19 15:45:58,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:45:58,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:45:58,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:45:58,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:45:58,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:45:58,031 INFO L87 Difference]: Start difference. First operand 4856 states and 7030 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-19 15:45:58,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:45:58,499 INFO L93 Difference]: Finished difference Result 4862 states and 7035 transitions. [2021-11-19 15:45:58,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:45:58,500 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 106 [2021-11-19 15:45:58,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:45:58,524 INFO L225 Difference]: With dead ends: 4862 [2021-11-19 15:45:58,524 INFO L226 Difference]: Without dead ends: 4860 [2021-11-19 15:45:58,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:45:58,530 INFO L933 BasicCegarLoop]: 2616 mSDtfsCounter, 2583 mSDsluCounter, 5211 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2585 SdHoareTripleChecker+Valid, 7827 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:45:58,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2585 Valid, 7827 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:45:58,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4860 states. [2021-11-19 15:45:59,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4860 to 4860. [2021-11-19 15:45:59,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4860 states, 2835 states have (on average 1.2285714285714286) internal successors, (3483), 2910 states have internal predecessors, (3483), 1763 states have call successors, (1763), 260 states have call predecessors, (1763), 259 states have return successors, (1787), 1729 states have call predecessors, (1787), 1760 states have call successors, (1787) [2021-11-19 15:45:59,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4860 states to 4860 states and 7033 transitions. [2021-11-19 15:45:59,126 INFO L78 Accepts]: Start accepts. Automaton has 4860 states and 7033 transitions. Word has length 106 [2021-11-19 15:45:59,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:45:59,127 INFO L470 AbstractCegarLoop]: Abstraction has 4860 states and 7033 transitions. [2021-11-19 15:45:59,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-19 15:45:59,127 INFO L276 IsEmpty]: Start isEmpty. Operand 4860 states and 7033 transitions. [2021-11-19 15:45:59,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-19 15:45:59,130 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:45:59,131 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:45:59,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 15:45:59,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:45:59,348 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 15:45:59,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:45:59,349 INFO L85 PathProgramCache]: Analyzing trace with hash -193331172, now seen corresponding path program 1 times [2021-11-19 15:45:59,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:45:59,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [98334336] [2021-11-19 15:45:59,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:45:59,351 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:45:59,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:45:59,353 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:45:59,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 15:46:00,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:46:00,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 1235 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:46:00,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:46:01,169 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2021-11-19 15:46:01,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:46:01,670 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2021-11-19 15:46:01,670 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:46:01,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [98334336] [2021-11-19 15:46:01,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [98334336] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:46:01,671 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:46:01,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-19 15:46:01,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341929155] [2021-11-19 15:46:01,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:46:01,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:46:01,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:46:01,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:46:01,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:46:01,673 INFO L87 Difference]: Start difference. First operand 4860 states and 7033 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-19 15:46:02,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:46:02,213 INFO L93 Difference]: Finished difference Result 4866 states and 7038 transitions. [2021-11-19 15:46:02,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:46:02,214 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 120 [2021-11-19 15:46:02,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:46:02,242 INFO L225 Difference]: With dead ends: 4866 [2021-11-19 15:46:02,242 INFO L226 Difference]: Without dead ends: 4862 [2021-11-19 15:46:02,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:46:02,247 INFO L933 BasicCegarLoop]: 2616 mSDtfsCounter, 2574 mSDsluCounter, 5211 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2575 SdHoareTripleChecker+Valid, 7827 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:46:02,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2575 Valid, 7827 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:46:02,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4862 states. [2021-11-19 15:46:02,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4862 to 4862. [2021-11-19 15:46:02,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4862 states, 2837 states have (on average 1.2280578075431794) internal successors, (3484), 2911 states have internal predecessors, (3484), 1763 states have call successors, (1763), 261 states have call predecessors, (1763), 259 states have return successors, (1787), 1729 states have call predecessors, (1787), 1760 states have call successors, (1787) [2021-11-19 15:46:02,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4862 states to 4862 states and 7034 transitions. [2021-11-19 15:46:02,950 INFO L78 Accepts]: Start accepts. Automaton has 4862 states and 7034 transitions. Word has length 120 [2021-11-19 15:46:02,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:46:02,951 INFO L470 AbstractCegarLoop]: Abstraction has 4862 states and 7034 transitions. [2021-11-19 15:46:02,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-19 15:46:02,951 INFO L276 IsEmpty]: Start isEmpty. Operand 4862 states and 7034 transitions. [2021-11-19 15:46:02,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-19 15:46:02,954 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:46:02,954 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:46:02,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 15:46:03,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:46:03,177 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 15:46:03,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:46:03,177 INFO L85 PathProgramCache]: Analyzing trace with hash -954292816, now seen corresponding path program 1 times [2021-11-19 15:46:03,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:46:03,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1366226718] [2021-11-19 15:46:03,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:46:03,179 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:46:03,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:46:03,181 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:46:03,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 15:46:03,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:46:03,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 1242 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:46:03,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:46:04,830 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2021-11-19 15:46:04,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:46:05,342 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2021-11-19 15:46:05,343 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:46:05,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1366226718] [2021-11-19 15:46:05,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1366226718] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:46:05,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:46:05,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-19 15:46:05,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412369020] [2021-11-19 15:46:05,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:46:05,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:46:05,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:46:05,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:46:05,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:46:05,345 INFO L87 Difference]: Start difference. First operand 4862 states and 7034 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-19 15:46:05,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:46:05,812 INFO L93 Difference]: Finished difference Result 4862 states and 7034 transitions. [2021-11-19 15:46:05,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:46:05,812 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 125 [2021-11-19 15:46:05,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:46:05,838 INFO L225 Difference]: With dead ends: 4862 [2021-11-19 15:46:05,838 INFO L226 Difference]: Without dead ends: 4723 [2021-11-19 15:46:05,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:46:05,843 INFO L933 BasicCegarLoop]: 2614 mSDtfsCounter, 2570 mSDsluCounter, 5210 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2570 SdHoareTripleChecker+Valid, 7824 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:46:05,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2570 Valid, 7824 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:46:05,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4723 states. [2021-11-19 15:46:06,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4723 to 4723. [2021-11-19 15:46:06,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4723 states, 2746 states have (on average 1.2330662782228696) internal successors, (3386), 2817 states have internal predecessors, (3386), 1729 states have call successors, (1729), 246 states have call predecessors, (1729), 246 states have return successors, (1756), 1699 states have call predecessors, (1756), 1729 states have call successors, (1756) [2021-11-19 15:46:06,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4723 states to 4723 states and 6871 transitions. [2021-11-19 15:46:06,430 INFO L78 Accepts]: Start accepts. Automaton has 4723 states and 6871 transitions. Word has length 125 [2021-11-19 15:46:06,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:46:06,430 INFO L470 AbstractCegarLoop]: Abstraction has 4723 states and 6871 transitions. [2021-11-19 15:46:06,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-19 15:46:06,431 INFO L276 IsEmpty]: Start isEmpty. Operand 4723 states and 6871 transitions. [2021-11-19 15:46:06,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-11-19 15:46:06,437 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:46:06,438 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:46:06,465 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-19 15:46:06,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:46:06,653 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 15:46:06,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:46:06,653 INFO L85 PathProgramCache]: Analyzing trace with hash -254548618, now seen corresponding path program 1 times [2021-11-19 15:46:06,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:46:06,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [243851255] [2021-11-19 15:46:06,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:46:06,655 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:46:06,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:46:06,656 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:46:06,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 15:46:07,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:46:07,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 1689 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 15:46:07,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:46:08,813 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 180 proven. 3 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2021-11-19 15:46:08,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:46:09,997 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 3 proven. 54 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2021-11-19 15:46:09,997 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:46:09,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [243851255] [2021-11-19 15:46:09,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [243851255] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:46:09,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1825313508] [2021-11-19 15:46:09,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:46:09,998 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:46:09,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:46:10,001 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:46:10,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-19 15:46:10,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:46:10,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 1689 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 15:46:10,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:46:12,385 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 177 proven. 0 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2021-11-19 15:46:12,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:46:13,124 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 483 trivial. 0 not checked. [2021-11-19 15:46:13,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1825313508] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:46:13,125 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:46:13,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8, 8] total 10 [2021-11-19 15:46:13,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802178632] [2021-11-19 15:46:13,125 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:46:13,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 15:46:13,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:46:13,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 15:46:13,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:46:13,127 INFO L87 Difference]: Start difference. First operand 4723 states and 6871 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (51), 3 states have call predecessors, (51), 3 states have return successors, (47), 3 states have call predecessors, (47), 3 states have call successors, (47) [2021-11-19 15:46:13,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:46:13,962 INFO L93 Difference]: Finished difference Result 7083 states and 10273 transitions. [2021-11-19 15:46:13,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 15:46:13,962 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (51), 3 states have call predecessors, (51), 3 states have return successors, (47), 3 states have call predecessors, (47), 3 states have call successors, (47) Word has length 222 [2021-11-19 15:46:13,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:46:13,991 INFO L225 Difference]: With dead ends: 7083 [2021-11-19 15:46:13,991 INFO L226 Difference]: Without dead ends: 4727 [2021-11-19 15:46:14,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 884 GetRequests, 876 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:46:14,016 INFO L933 BasicCegarLoop]: 4639 mSDtfsCounter, 2402 mSDsluCounter, 2477 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2402 SdHoareTripleChecker+Valid, 7116 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 15:46:14,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2402 Valid, 7116 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 15:46:14,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4727 states. [2021-11-19 15:46:14,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4727 to 4723. [2021-11-19 15:46:14,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4723 states, 2746 states have (on average 1.2279679533867442) internal successors, (3372), 2817 states have internal predecessors, (3372), 1729 states have call successors, (1729), 246 states have call predecessors, (1729), 246 states have return successors, (1729), 1699 states have call predecessors, (1729), 1729 states have call successors, (1729) [2021-11-19 15:46:14,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4723 states to 4723 states and 6830 transitions. [2021-11-19 15:46:14,702 INFO L78 Accepts]: Start accepts. Automaton has 4723 states and 6830 transitions. Word has length 222 [2021-11-19 15:46:14,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:46:14,703 INFO L470 AbstractCegarLoop]: Abstraction has 4723 states and 6830 transitions. [2021-11-19 15:46:14,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (51), 3 states have call predecessors, (51), 3 states have return successors, (47), 3 states have call predecessors, (47), 3 states have call successors, (47) [2021-11-19 15:46:14,703 INFO L276 IsEmpty]: Start isEmpty. Operand 4723 states and 6830 transitions. [2021-11-19 15:46:14,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-11-19 15:46:14,708 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:46:14,708 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:46:14,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 15:46:14,918 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2021-11-19 15:46:15,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:46:15,109 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 15:46:15,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:46:15,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1603859444, now seen corresponding path program 1 times [2021-11-19 15:46:15,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:46:15,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1869644724] [2021-11-19 15:46:15,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:46:15,111 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:46:15,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:46:15,112 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:46:15,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 15:46:16,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:46:16,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 1689 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 15:46:16,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:46:17,275 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 180 proven. 3 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2021-11-19 15:46:17,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:46:18,350 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 3 proven. 54 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2021-11-19 15:46:18,351 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:46:18,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1869644724] [2021-11-19 15:46:18,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1869644724] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:46:18,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [259128616] [2021-11-19 15:46:18,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:46:18,351 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:46:18,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:46:18,352 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:46:18,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-19 15:46:20,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:46:20,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 1689 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 15:46:20,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:46:22,295 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 177 proven. 0 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2021-11-19 15:46:22,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:46:23,177 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2021-11-19 15:46:23,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [259128616] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:46:23,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-19 15:46:23,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 8, 6] total 13 [2021-11-19 15:46:23,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686608900] [2021-11-19 15:46:23,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:46:23,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:46:23,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:46:23,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:46:23,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-11-19 15:46:23,179 INFO L87 Difference]: Start difference. First operand 4723 states and 6830 transitions. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 5 states have internal predecessors, (85), 3 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-19 15:46:23,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:46:23,719 INFO L93 Difference]: Finished difference Result 9420 states and 13623 transitions. [2021-11-19 15:46:23,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:46:23,720 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 5 states have internal predecessors, (85), 3 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) Word has length 222 [2021-11-19 15:46:23,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:46:23,739 INFO L225 Difference]: With dead ends: 9420 [2021-11-19 15:46:23,739 INFO L226 Difference]: Without dead ends: 4723 [2021-11-19 15:46:23,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 885 GetRequests, 873 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-11-19 15:46:23,769 INFO L933 BasicCegarLoop]: 2537 mSDtfsCounter, 101 mSDsluCounter, 9991 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 12528 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:46:23,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 12528 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:46:23,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4723 states. [2021-11-19 15:46:24,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4723 to 4723. [2021-11-19 15:46:24,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4723 states, 2746 states have (on average 1.2272396212672978) internal successors, (3370), 2815 states have internal predecessors, (3370), 1729 states have call successors, (1729), 246 states have call predecessors, (1729), 246 states have return successors, (1729), 1699 states have call predecessors, (1729), 1729 states have call successors, (1729) [2021-11-19 15:46:24,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4723 states to 4723 states and 6828 transitions. [2021-11-19 15:46:24,272 INFO L78 Accepts]: Start accepts. Automaton has 4723 states and 6828 transitions. Word has length 222 [2021-11-19 15:46:24,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:46:24,273 INFO L470 AbstractCegarLoop]: Abstraction has 4723 states and 6828 transitions. [2021-11-19 15:46:24,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 5 states have internal predecessors, (85), 3 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-19 15:46:24,273 INFO L276 IsEmpty]: Start isEmpty. Operand 4723 states and 6828 transitions. [2021-11-19 15:46:24,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-11-19 15:46:24,276 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:46:24,277 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:46:24,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-19 15:46:24,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-19 15:46:24,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:46:24,678 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 15:46:24,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:46:24,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1805215921, now seen corresponding path program 1 times [2021-11-19 15:46:24,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:46:24,679 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [325699052] [2021-11-19 15:46:24,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:46:24,679 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:46:24,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:46:24,680 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:46:24,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 15:46:25,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:46:25,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 1700 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 15:46:25,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:46:26,827 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 265 proven. 0 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2021-11-19 15:46:26,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:46:28,373 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 24 proven. 23 refuted. 0 times theorem prover too weak. 436 trivial. 0 not checked. [2021-11-19 15:46:28,373 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:46:28,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [325699052] [2021-11-19 15:46:28,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [325699052] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:46:28,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:46:28,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 21 [2021-11-19 15:46:28,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226645724] [2021-11-19 15:46:28,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:46:28,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 15:46:28,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:46:28,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 15:46:28,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-11-19 15:46:28,376 INFO L87 Difference]: Start difference. First operand 4723 states and 6828 transitions. Second operand has 12 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 5 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (27), 5 states have call predecessors, (27), 5 states have call successors, (27) [2021-11-19 15:46:31,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:46:31,104 INFO L93 Difference]: Finished difference Result 9604 states and 13897 transitions. [2021-11-19 15:46:31,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 15:46:31,105 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 5 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (27), 5 states have call predecessors, (27), 5 states have call successors, (27) Word has length 226 [2021-11-19 15:46:31,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:46:31,123 INFO L225 Difference]: With dead ends: 9604 [2021-11-19 15:46:31,123 INFO L226 Difference]: Without dead ends: 4913 [2021-11-19 15:46:31,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-11-19 15:46:31,142 INFO L933 BasicCegarLoop]: 2638 mSDtfsCounter, 202 mSDsluCounter, 26040 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 28678 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-19 15:46:31,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 28678 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-19 15:46:31,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4913 states. [2021-11-19 15:46:31,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4913 to 4739. [2021-11-19 15:46:31,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4739 states, 2758 states have (on average 1.2262509064539522) internal successors, (3382), 2827 states have internal predecessors, (3382), 1733 states have call successors, (1733), 246 states have call predecessors, (1733), 246 states have return successors, (1733), 1703 states have call predecessors, (1733), 1733 states have call successors, (1733) [2021-11-19 15:46:31,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4739 states to 4739 states and 6848 transitions. [2021-11-19 15:46:31,629 INFO L78 Accepts]: Start accepts. Automaton has 4739 states and 6848 transitions. Word has length 226 [2021-11-19 15:46:31,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:46:31,629 INFO L470 AbstractCegarLoop]: Abstraction has 4739 states and 6848 transitions. [2021-11-19 15:46:31,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 5 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (27), 5 states have call predecessors, (27), 5 states have call successors, (27) [2021-11-19 15:46:31,629 INFO L276 IsEmpty]: Start isEmpty. Operand 4739 states and 6848 transitions. [2021-11-19 15:46:31,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-11-19 15:46:31,634 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:46:31,634 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:46:31,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-19 15:46:31,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:46:31,843 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 15:46:31,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:46:31,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1008901278, now seen corresponding path program 1 times [2021-11-19 15:46:31,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:46:31,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2085785966] [2021-11-19 15:46:31,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:46:31,846 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:46:31,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:46:31,847 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:46:31,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 15:46:32,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:46:33,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 1787 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 15:46:33,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:46:34,316 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 265 proven. 0 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2021-11-19 15:46:34,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:46:36,137 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 24 proven. 23 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2021-11-19 15:46:36,137 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:46:36,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2085785966] [2021-11-19 15:46:36,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2085785966] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:46:36,138 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:46:36,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 23 [2021-11-19 15:46:36,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056684310] [2021-11-19 15:46:36,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:46:36,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 15:46:36,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:46:36,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 15:46:36,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-11-19 15:46:36,140 INFO L87 Difference]: Start difference. First operand 4739 states and 6848 transitions. Second operand has 13 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 5 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (34), 5 states have call predecessors, (34), 5 states have call successors, (34) [2021-11-19 15:46:39,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:46:39,563 INFO L93 Difference]: Finished difference Result 9658 states and 13965 transitions. [2021-11-19 15:46:39,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-19 15:46:39,563 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 5 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (34), 5 states have call predecessors, (34), 5 states have call successors, (34) Word has length 265 [2021-11-19 15:46:39,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:46:39,584 INFO L225 Difference]: With dead ends: 9658 [2021-11-19 15:46:39,584 INFO L226 Difference]: Without dead ends: 4951 [2021-11-19 15:46:39,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 546 GetRequests, 510 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=234, Invalid=1172, Unknown=0, NotChecked=0, Total=1406 [2021-11-19 15:46:39,610 INFO L933 BasicCegarLoop]: 2647 mSDtfsCounter, 220 mSDsluCounter, 28720 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 31367 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-19 15:46:39,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 31367 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-19 15:46:39,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4951 states. [2021-11-19 15:46:40,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4951 to 4743. [2021-11-19 15:46:40,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4743 states, 2762 states have (on average 1.226285300506879) internal successors, (3387), 2831 states have internal predecessors, (3387), 1733 states have call successors, (1733), 246 states have call predecessors, (1733), 246 states have return successors, (1733), 1703 states have call predecessors, (1733), 1733 states have call successors, (1733) [2021-11-19 15:46:40,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4743 states to 4743 states and 6853 transitions. [2021-11-19 15:46:40,293 INFO L78 Accepts]: Start accepts. Automaton has 4743 states and 6853 transitions. Word has length 265 [2021-11-19 15:46:40,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:46:40,293 INFO L470 AbstractCegarLoop]: Abstraction has 4743 states and 6853 transitions. [2021-11-19 15:46:40,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 5 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (34), 5 states have call predecessors, (34), 5 states have call successors, (34) [2021-11-19 15:46:40,294 INFO L276 IsEmpty]: Start isEmpty. Operand 4743 states and 6853 transitions. [2021-11-19 15:46:40,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2021-11-19 15:46:40,301 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:46:40,301 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 8, 8, 8, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:46:40,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-19 15:46:40,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:46:40,522 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 15:46:40,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:46:40,523 INFO L85 PathProgramCache]: Analyzing trace with hash 2073938409, now seen corresponding path program 1 times [2021-11-19 15:46:40,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:46:40,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2071131273] [2021-11-19 15:46:40,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:46:40,525 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:46:40,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:46:40,526 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:46:40,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-19 15:46:42,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:46:42,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 2168 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 15:46:42,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:46:43,736 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 271 proven. 0 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2021-11-19 15:46:43,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:46:46,069 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 24 proven. 23 refuted. 0 times theorem prover too weak. 593 trivial. 0 not checked. [2021-11-19 15:46:46,069 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:46:46,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2071131273] [2021-11-19 15:46:46,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2071131273] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:46:46,069 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:46:46,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [15] total 27 [2021-11-19 15:46:46,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631836526] [2021-11-19 15:46:46,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:46:46,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-19 15:46:46,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:46:46,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-19 15:46:46,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2021-11-19 15:46:46,071 INFO L87 Difference]: Start difference. First operand 4743 states and 6853 transitions. Second operand has 15 states, 14 states have (on average 9.857142857142858) internal successors, (138), 13 states have internal predecessors, (138), 5 states have call successors, (51), 2 states have call predecessors, (51), 5 states have return successors, (47), 6 states have call predecessors, (47), 5 states have call successors, (47) [2021-11-19 15:46:49,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:46:49,411 INFO L93 Difference]: Finished difference Result 9668 states and 13980 transitions. [2021-11-19 15:46:49,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-19 15:46:49,412 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 9.857142857142858) internal successors, (138), 13 states have internal predecessors, (138), 5 states have call successors, (51), 2 states have call predecessors, (51), 5 states have return successors, (47), 6 states have call predecessors, (47), 5 states have call successors, (47) Word has length 346 [2021-11-19 15:46:49,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:46:49,435 INFO L225 Difference]: With dead ends: 9668 [2021-11-19 15:46:49,435 INFO L226 Difference]: Without dead ends: 4957 [2021-11-19 15:46:49,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 703 GetRequests, 667 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=186, Invalid=1220, Unknown=0, NotChecked=0, Total=1406 [2021-11-19 15:46:49,457 INFO L933 BasicCegarLoop]: 2651 mSDtfsCounter, 208 mSDsluCounter, 34045 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 36696 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-19 15:46:49,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 36696 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-19 15:46:49,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4957 states. [2021-11-19 15:46:50,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4957 to 4749. [2021-11-19 15:46:50,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4749 states, 2766 states have (on average 1.2259580621836588) internal successors, (3391), 2835 states have internal predecessors, (3391), 1733 states have call successors, (1733), 246 states have call predecessors, (1733), 248 states have return successors, (1737), 1705 states have call predecessors, (1737), 1733 states have call successors, (1737) [2021-11-19 15:46:50,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4749 states to 4749 states and 6861 transitions. [2021-11-19 15:46:50,058 INFO L78 Accepts]: Start accepts. Automaton has 4749 states and 6861 transitions. Word has length 346 [2021-11-19 15:46:50,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:46:50,059 INFO L470 AbstractCegarLoop]: Abstraction has 4749 states and 6861 transitions. [2021-11-19 15:46:50,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 9.857142857142858) internal successors, (138), 13 states have internal predecessors, (138), 5 states have call successors, (51), 2 states have call predecessors, (51), 5 states have return successors, (47), 6 states have call predecessors, (47), 5 states have call successors, (47) [2021-11-19 15:46:50,060 INFO L276 IsEmpty]: Start isEmpty. Operand 4749 states and 6861 transitions. [2021-11-19 15:46:50,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-11-19 15:46:50,069 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:46:50,069 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 8, 8, 8, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:46:50,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-19 15:46:50,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:46:50,293 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 15:46:50,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:46:50,293 INFO L85 PathProgramCache]: Analyzing trace with hash -135990715, now seen corresponding path program 1 times [2021-11-19 15:46:50,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:46:50,295 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1966456504] [2021-11-19 15:46:50,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:46:50,295 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:46:50,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:46:50,296 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:46:50,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-19 15:46:52,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:46:52,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 2506 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 15:46:52,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:46:53,762 INFO L134 CoverageAnalysis]: Checked inductivity of 614 backedges. 243 proven. 0 refuted. 0 times theorem prover too weak. 371 trivial. 0 not checked. [2021-11-19 15:46:53,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:46:54,938 INFO L134 CoverageAnalysis]: Checked inductivity of 614 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2021-11-19 15:46:54,938 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:46:54,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1966456504] [2021-11-19 15:46:54,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1966456504] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:46:54,938 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:46:54,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-19 15:46:54,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479899824] [2021-11-19 15:46:54,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:46:54,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:46:54,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:46:54,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:46:54,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:46:54,940 INFO L87 Difference]: Start difference. First operand 4749 states and 6861 transitions. Second operand has 6 states, 6 states have (on average 26.5) internal successors, (159), 5 states have internal predecessors, (159), 2 states have call successors, (55), 2 states have call predecessors, (55), 3 states have return successors, (51), 3 states have call predecessors, (51), 2 states have call successors, (51) [2021-11-19 15:46:57,144 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:46:57,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:46:57,502 INFO L93 Difference]: Finished difference Result 9482 states and 13707 transitions. [2021-11-19 15:46:57,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:46:57,525 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.5) internal successors, (159), 5 states have internal predecessors, (159), 2 states have call successors, (55), 2 states have call predecessors, (55), 3 states have return successors, (51), 3 states have call predecessors, (51), 2 states have call successors, (51) Word has length 390 [2021-11-19 15:46:57,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:46:57,550 INFO L225 Difference]: With dead ends: 9482 [2021-11-19 15:46:57,550 INFO L226 Difference]: Without dead ends: 4767 [2021-11-19 15:46:57,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 779 GetRequests, 770 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-19 15:46:57,579 INFO L933 BasicCegarLoop]: 2538 mSDtfsCounter, 5 mSDsluCounter, 10144 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 12682 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:46:57,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 12682 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2021-11-19 15:46:57,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4767 states. [2021-11-19 15:46:58,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4767 to 4759. [2021-11-19 15:46:58,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4759 states, 2774 states have (on average 1.2253064167267484) internal successors, (3399), 2843 states have internal predecessors, (3399), 1733 states have call successors, (1733), 246 states have call predecessors, (1733), 250 states have return successors, (1743), 1707 states have call predecessors, (1743), 1733 states have call successors, (1743) [2021-11-19 15:46:58,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4759 states to 4759 states and 6875 transitions. [2021-11-19 15:46:58,175 INFO L78 Accepts]: Start accepts. Automaton has 4759 states and 6875 transitions. Word has length 390 [2021-11-19 15:46:58,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:46:58,175 INFO L470 AbstractCegarLoop]: Abstraction has 4759 states and 6875 transitions. [2021-11-19 15:46:58,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.5) internal successors, (159), 5 states have internal predecessors, (159), 2 states have call successors, (55), 2 states have call predecessors, (55), 3 states have return successors, (51), 3 states have call predecessors, (51), 2 states have call successors, (51) [2021-11-19 15:46:58,176 INFO L276 IsEmpty]: Start isEmpty. Operand 4759 states and 6875 transitions. [2021-11-19 15:46:58,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2021-11-19 15:46:58,183 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:46:58,184 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 8, 8, 8, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:46:58,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-19 15:46:58,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:46:58,401 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 15:46:58,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:46:58,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1713472791, now seen corresponding path program 1 times [2021-11-19 15:46:58,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:46:58,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1052299425] [2021-11-19 15:46:58,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:46:58,404 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:46:58,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:46:58,405 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:46:58,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-19 15:47:00,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:47:00,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 2538 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 15:47:01,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:47:02,070 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 247 proven. 0 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2021-11-19 15:47:02,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:47:03,285 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 735 trivial. 0 not checked. [2021-11-19 15:47:03,285 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:47:03,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1052299425] [2021-11-19 15:47:03,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1052299425] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:47:03,286 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:47:03,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-19 15:47:03,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262981754] [2021-11-19 15:47:03,286 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:47:03,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 15:47:03,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:47:03,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 15:47:03,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:47:03,288 INFO L87 Difference]: Start difference. First operand 4759 states and 6875 transitions. Second operand has 10 states, 10 states have (on average 18.3) internal successors, (183), 8 states have internal predecessors, (183), 2 states have call successors, (68), 2 states have call predecessors, (68), 4 states have return successors, (65), 4 states have call predecessors, (65), 2 states have call successors, (65) [2021-11-19 15:47:05,390 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:47:07,422 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:47:08,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:47:08,324 INFO L93 Difference]: Finished difference Result 9518 states and 13757 transitions. [2021-11-19 15:47:08,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 15:47:08,326 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 18.3) internal successors, (183), 8 states have internal predecessors, (183), 2 states have call successors, (68), 2 states have call predecessors, (68), 4 states have return successors, (65), 4 states have call predecessors, (65), 2 states have call successors, (65) Word has length 406 [2021-11-19 15:47:08,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:47:08,355 INFO L225 Difference]: With dead ends: 9518 [2021-11-19 15:47:08,356 INFO L226 Difference]: Without dead ends: 4793 [2021-11-19 15:47:08,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 811 GetRequests, 802 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-19 15:47:08,383 INFO L933 BasicCegarLoop]: 2544 mSDtfsCounter, 21 mSDsluCounter, 10168 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 9 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 12712 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:47:08,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 12712 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 19 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2021-11-19 15:47:08,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4793 states. [2021-11-19 15:47:08,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4793 to 4765. [2021-11-19 15:47:08,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4765 states, 2780 states have (on average 1.224820143884892) internal successors, (3405), 2847 states have internal predecessors, (3405), 1733 states have call successors, (1733), 246 states have call predecessors, (1733), 250 states have return successors, (1743), 1709 states have call predecessors, (1743), 1733 states have call successors, (1743) [2021-11-19 15:47:08,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4765 states to 4765 states and 6881 transitions. [2021-11-19 15:47:08,942 INFO L78 Accepts]: Start accepts. Automaton has 4765 states and 6881 transitions. Word has length 406 [2021-11-19 15:47:08,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:47:08,943 INFO L470 AbstractCegarLoop]: Abstraction has 4765 states and 6881 transitions. [2021-11-19 15:47:08,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.3) internal successors, (183), 8 states have internal predecessors, (183), 2 states have call successors, (68), 2 states have call predecessors, (68), 4 states have return successors, (65), 4 states have call predecessors, (65), 2 states have call successors, (65) [2021-11-19 15:47:08,943 INFO L276 IsEmpty]: Start isEmpty. Operand 4765 states and 6881 transitions. [2021-11-19 15:47:08,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2021-11-19 15:47:08,951 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:47:08,952 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 8, 8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:47:09,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-19 15:47:09,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:47:09,165 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 15:47:09,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:47:09,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1440362043, now seen corresponding path program 1 times [2021-11-19 15:47:09,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:47:09,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1940346157] [2021-11-19 15:47:09,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:47:09,167 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:47:09,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:47:09,168 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:47:09,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-19 15:47:11,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:47:11,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 2570 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:47:11,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:47:14,617 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 280 proven. 0 refuted. 0 times theorem prover too weak. 604 trivial. 0 not checked. [2021-11-19 15:47:14,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:47:16,020 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 884 trivial. 0 not checked. [2021-11-19 15:47:16,020 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:47:16,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1940346157] [2021-11-19 15:47:16,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1940346157] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:47:16,021 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:47:16,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 3 [2021-11-19 15:47:16,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279944261] [2021-11-19 15:47:16,021 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:47:16,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 15:47:16,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:47:16,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 15:47:16,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 15:47:16,023 INFO L87 Difference]: Start difference. First operand 4765 states and 6881 transitions. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 3 states have call successors, (107), 3 states have call predecessors, (107), 3 states have return successors, (103), 3 states have call predecessors, (103), 3 states have call successors, (103) [2021-11-19 15:47:16,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:47:16,606 INFO L93 Difference]: Finished difference Result 12691 states and 18226 transitions. [2021-11-19 15:47:16,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 15:47:16,607 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 3 states have call successors, (107), 3 states have call predecessors, (107), 3 states have return successors, (103), 3 states have call predecessors, (103), 3 states have call successors, (103) Word has length 422 [2021-11-19 15:47:16,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:47:16,651 INFO L225 Difference]: With dead ends: 12691 [2021-11-19 15:47:16,651 INFO L226 Difference]: Without dead ends: 7960 [2021-11-19 15:47:16,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 842 GetRequests, 841 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 15:47:16,678 INFO L933 BasicCegarLoop]: 4440 mSDtfsCounter, 1986 mSDsluCounter, 2506 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1986 SdHoareTripleChecker+Valid, 6946 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:47:16,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1986 Valid, 6946 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 15:47:16,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7960 states. [2021-11-19 15:47:17,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7960 to 7956. [2021-11-19 15:47:17,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7956 states, 4680 states have (on average 1.2213675213675215) internal successors, (5716), 4793 states have internal predecessors, (5716), 2822 states have call successors, (2822), 444 states have call predecessors, (2822), 452 states have return successors, (2846), 2782 states have call predecessors, (2846), 2822 states have call successors, (2846) [2021-11-19 15:47:17,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7956 states to 7956 states and 11384 transitions. [2021-11-19 15:47:17,744 INFO L78 Accepts]: Start accepts. Automaton has 7956 states and 11384 transitions. Word has length 422 [2021-11-19 15:47:17,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:47:17,744 INFO L470 AbstractCegarLoop]: Abstraction has 7956 states and 11384 transitions. [2021-11-19 15:47:17,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 3 states have call successors, (107), 3 states have call predecessors, (107), 3 states have return successors, (103), 3 states have call predecessors, (103), 3 states have call successors, (103) [2021-11-19 15:47:17,745 INFO L276 IsEmpty]: Start isEmpty. Operand 7956 states and 11384 transitions. [2021-11-19 15:47:17,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2021-11-19 15:47:17,751 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:47:17,751 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 8, 8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:47:17,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-19 15:47:17,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:47:17,957 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 15:47:17,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:47:17,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1157163530, now seen corresponding path program 1 times [2021-11-19 15:47:17,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:47:17,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [246448902] [2021-11-19 15:47:17,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:47:17,959 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:47:17,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:47:17,960 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:47:17,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-19 15:47:20,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:47:20,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 2428 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-19 15:47:20,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:47:22,110 INFO L134 CoverageAnalysis]: Checked inductivity of 948 backedges. 381 proven. 0 refuted. 0 times theorem prover too weak. 567 trivial. 0 not checked. [2021-11-19 15:47:22,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:47:25,317 INFO L134 CoverageAnalysis]: Checked inductivity of 948 backedges. 36 proven. 23 refuted. 0 times theorem prover too weak. 889 trivial. 0 not checked. [2021-11-19 15:47:25,317 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:47:25,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [246448902] [2021-11-19 15:47:25,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [246448902] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:47:25,317 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:47:25,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [16] total 29 [2021-11-19 15:47:25,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792218427] [2021-11-19 15:47:25,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:47:25,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-19 15:47:25,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:47:25,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-19 15:47:25,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=743, Unknown=0, NotChecked=0, Total=812 [2021-11-19 15:47:25,320 INFO L87 Difference]: Start difference. First operand 7956 states and 11384 transitions. Second operand has 16 states, 15 states have (on average 11.066666666666666) internal successors, (166), 14 states have internal predecessors, (166), 6 states have call successors, (64), 2 states have call predecessors, (64), 5 states have return successors, (60), 7 states have call predecessors, (60), 6 states have call successors, (60) [2021-11-19 15:47:30,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:47:30,784 INFO L93 Difference]: Finished difference Result 16430 states and 23521 transitions. [2021-11-19 15:47:30,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-19 15:47:30,785 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 11.066666666666666) internal successors, (166), 14 states have internal predecessors, (166), 6 states have call successors, (64), 2 states have call predecessors, (64), 5 states have return successors, (60), 7 states have call predecessors, (60), 6 states have call successors, (60) Word has length 425 [2021-11-19 15:47:30,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:47:30,811 INFO L225 Difference]: With dead ends: 16430 [2021-11-19 15:47:30,811 INFO L226 Difference]: Without dead ends: 8504 [2021-11-19 15:47:30,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 868 GetRequests, 824 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=266, Invalid=1804, Unknown=0, NotChecked=0, Total=2070 [2021-11-19 15:47:30,831 INFO L933 BasicCegarLoop]: 2655 mSDtfsCounter, 222 mSDsluCounter, 36739 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 39394 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-19 15:47:30,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 39394 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 711 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-19 15:47:30,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8504 states. [2021-11-19 15:47:31,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8504 to 7958. [2021-11-19 15:47:31,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7958 states, 4680 states have (on average 1.2213675213675215) internal successors, (5716), 4793 states have internal predecessors, (5716), 2826 states have call successors, (2826), 444 states have call predecessors, (2826), 450 states have return successors, (2846), 2784 states have call predecessors, (2846), 2826 states have call successors, (2846) [2021-11-19 15:47:31,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7958 states to 7958 states and 11388 transitions. [2021-11-19 15:47:31,529 INFO L78 Accepts]: Start accepts. Automaton has 7958 states and 11388 transitions. Word has length 425 [2021-11-19 15:47:31,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:47:31,529 INFO L470 AbstractCegarLoop]: Abstraction has 7958 states and 11388 transitions. [2021-11-19 15:47:31,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 11.066666666666666) internal successors, (166), 14 states have internal predecessors, (166), 6 states have call successors, (64), 2 states have call predecessors, (64), 5 states have return successors, (60), 7 states have call predecessors, (60), 6 states have call successors, (60) [2021-11-19 15:47:31,530 INFO L276 IsEmpty]: Start isEmpty. Operand 7958 states and 11388 transitions. [2021-11-19 15:47:31,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 569 [2021-11-19 15:47:31,612 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:47:31,612 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 14, 14, 14, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:47:31,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-19 15:47:31,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:47:31,813 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 15:47:31,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:47:31,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1521216052, now seen corresponding path program 1 times [2021-11-19 15:47:31,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:47:31,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1124343611] [2021-11-19 15:47:31,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:47:31,815 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:47:31,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:47:31,816 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:47:31,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-19 15:47:33,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:47:33,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 2461 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 15:47:33,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:47:35,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4219 backedges. 859 proven. 0 refuted. 0 times theorem prover too weak. 3360 trivial. 0 not checked. [2021-11-19 15:47:35,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:47:36,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4219 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4219 trivial. 0 not checked. [2021-11-19 15:47:36,617 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:47:36,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1124343611] [2021-11-19 15:47:36,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1124343611] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:47:36,617 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:47:36,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 15:47:36,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255992939] [2021-11-19 15:47:36,617 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:47:36,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 15:47:36,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:47:36,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 15:47:36,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 15:47:36,619 INFO L87 Difference]: Start difference. First operand 7958 states and 11388 transitions. Second operand has 4 states, 4 states have (on average 42.75) internal successors, (171), 4 states have internal predecessors, (171), 2 states have call successors, (100), 2 states have call predecessors, (100), 2 states have return successors, (96), 2 states have call predecessors, (96), 2 states have call successors, (96) [2021-11-19 15:47:37,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:47:37,789 INFO L93 Difference]: Finished difference Result 16312 states and 23351 transitions. [2021-11-19 15:47:37,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 15:47:37,790 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.75) internal successors, (171), 4 states have internal predecessors, (171), 2 states have call successors, (100), 2 states have call predecessors, (100), 2 states have return successors, (96), 2 states have call predecessors, (96), 2 states have call successors, (96) Word has length 568 [2021-11-19 15:47:37,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:47:37,815 INFO L225 Difference]: With dead ends: 16312 [2021-11-19 15:47:37,816 INFO L226 Difference]: Without dead ends: 8388 [2021-11-19 15:47:37,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1134 GetRequests, 1132 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 15:47:37,836 INFO L933 BasicCegarLoop]: 2656 mSDtfsCounter, 150 mSDsluCounter, 2586 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 5242 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 15:47:37,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 5242 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 15:47:37,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8388 states. [2021-11-19 15:47:38,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8388 to 7962. [2021-11-19 15:47:38,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7962 states, 4684 states have (on average 1.2211784799316823) internal successors, (5720), 4797 states have internal predecessors, (5720), 2826 states have call successors, (2826), 444 states have call predecessors, (2826), 450 states have return successors, (2846), 2784 states have call predecessors, (2846), 2826 states have call successors, (2846) [2021-11-19 15:47:38,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7962 states to 7962 states and 11392 transitions. [2021-11-19 15:47:38,628 INFO L78 Accepts]: Start accepts. Automaton has 7962 states and 11392 transitions. Word has length 568 [2021-11-19 15:47:38,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:47:38,628 INFO L470 AbstractCegarLoop]: Abstraction has 7962 states and 11392 transitions. [2021-11-19 15:47:38,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.75) internal successors, (171), 4 states have internal predecessors, (171), 2 states have call successors, (100), 2 states have call predecessors, (100), 2 states have return successors, (96), 2 states have call predecessors, (96), 2 states have call successors, (96) [2021-11-19 15:47:38,628 INFO L276 IsEmpty]: Start isEmpty. Operand 7962 states and 11392 transitions. [2021-11-19 15:47:38,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 585 [2021-11-19 15:47:38,639 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:47:38,640 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 16, 16, 16, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:47:38,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-19 15:47:38,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:47:38,841 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 15:47:38,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:47:38,841 INFO L85 PathProgramCache]: Analyzing trace with hash -854900434, now seen corresponding path program 1 times [2021-11-19 15:47:38,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:47:38,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [333025926] [2021-11-19 15:47:38,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:47:38,845 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:47:38,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:47:38,869 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:47:38,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-19 15:47:40,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:47:40,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 2493 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 15:47:40,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:47:42,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 336 proven. 3 refuted. 0 times theorem prover too weak. 4008 trivial. 0 not checked. [2021-11-19 15:47:42,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:47:44,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 21 proven. 24 refuted. 0 times theorem prover too weak. 4302 trivial. 0 not checked. [2021-11-19 15:47:44,347 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:47:44,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [333025926] [2021-11-19 15:47:44,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [333025926] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:47:44,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1541926521] [2021-11-19 15:47:44,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:47:44,348 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:47:44,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:47:44,351 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:47:44,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-19 15:47:47,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:47:47,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 2493 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 15:47:47,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:47:49,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 315 proven. 0 refuted. 0 times theorem prover too weak. 4032 trivial. 0 not checked. [2021-11-19 15:47:49,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:47:50,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4347 trivial. 0 not checked. [2021-11-19 15:47:50,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1541926521] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:47:50,784 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:47:50,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [9, 9] total 15 [2021-11-19 15:47:50,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307506626] [2021-11-19 15:47:50,785 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:47:50,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 15:47:50,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:47:50,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 15:47:50,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-11-19 15:47:50,786 INFO L87 Difference]: Start difference. First operand 7962 states and 11392 transitions. Second operand has 12 states, 12 states have (on average 12.583333333333334) internal successors, (151), 10 states have internal predecessors, (151), 4 states have call successors, (78), 2 states have call predecessors, (78), 4 states have return successors, (75), 6 states have call predecessors, (75), 4 states have call successors, (75) [2021-11-19 15:47:53,264 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:47:54,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:47:54,060 INFO L93 Difference]: Finished difference Result 15930 states and 22807 transitions. [2021-11-19 15:47:54,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 15:47:54,061 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 12.583333333333334) internal successors, (151), 10 states have internal predecessors, (151), 4 states have call successors, (78), 2 states have call predecessors, (78), 4 states have return successors, (75), 6 states have call predecessors, (75), 4 states have call successors, (75) Word has length 584 [2021-11-19 15:47:54,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:47:54,094 INFO L225 Difference]: With dead ends: 15930 [2021-11-19 15:47:54,094 INFO L226 Difference]: Without dead ends: 8002 [2021-11-19 15:47:54,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2334 GetRequests, 2319 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-11-19 15:47:54,118 INFO L933 BasicCegarLoop]: 2548 mSDtfsCounter, 156 mSDsluCounter, 20273 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 40 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 22821 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-19 15:47:54,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 22821 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 56 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-19 15:47:54,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8002 states. [2021-11-19 15:47:54,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8002 to 7962. [2021-11-19 15:47:54,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7962 states, 4684 states have (on average 1.2203245089666952) internal successors, (5716), 4797 states have internal predecessors, (5716), 2826 states have call successors, (2826), 444 states have call predecessors, (2826), 450 states have return successors, (2846), 2784 states have call predecessors, (2846), 2826 states have call successors, (2846) [2021-11-19 15:47:54,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7962 states to 7962 states and 11388 transitions. [2021-11-19 15:47:54,812 INFO L78 Accepts]: Start accepts. Automaton has 7962 states and 11388 transitions. Word has length 584 [2021-11-19 15:47:54,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:47:54,813 INFO L470 AbstractCegarLoop]: Abstraction has 7962 states and 11388 transitions. [2021-11-19 15:47:54,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.583333333333334) internal successors, (151), 10 states have internal predecessors, (151), 4 states have call successors, (78), 2 states have call predecessors, (78), 4 states have return successors, (75), 6 states have call predecessors, (75), 4 states have call successors, (75) [2021-11-19 15:47:54,813 INFO L276 IsEmpty]: Start isEmpty. Operand 7962 states and 11388 transitions. [2021-11-19 15:47:54,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 569 [2021-11-19 15:47:54,821 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:47:54,822 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 14, 14, 14, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:47:54,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-19 15:47:55,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-19 15:47:55,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:47:55,233 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 15:47:55,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:47:55,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1805775734, now seen corresponding path program 1 times [2021-11-19 15:47:55,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:47:55,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2140026886] [2021-11-19 15:47:55,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:47:55,236 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:47:55,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:47:55,237 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:47:55,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-19 15:47:56,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:47:56,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 2461 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 15:47:56,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:47:58,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4219 backedges. 271 proven. 0 refuted. 0 times theorem prover too weak. 3948 trivial. 0 not checked. [2021-11-19 15:47:58,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:48:01,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4219 backedges. 24 proven. 23 refuted. 0 times theorem prover too weak. 4172 trivial. 0 not checked. [2021-11-19 15:48:01,565 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:48:01,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2140026886] [2021-11-19 15:48:01,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2140026886] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:48:01,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:48:01,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [15] total 27 [2021-11-19 15:48:01,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359308777] [2021-11-19 15:48:01,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:01,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-19 15:48:01,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:48:01,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-19 15:48:01,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2021-11-19 15:48:01,568 INFO L87 Difference]: Start difference. First operand 7962 states and 11388 transitions. Second operand has 15 states, 14 states have (on average 10.0) internal successors, (140), 13 states have internal predecessors, (140), 5 states have call successors, (60), 2 states have call predecessors, (60), 5 states have return successors, (56), 6 states have call predecessors, (56), 5 states have call successors, (56) [2021-11-19 15:48:05,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:05,531 INFO L93 Difference]: Finished difference Result 16328 states and 23385 transitions. [2021-11-19 15:48:05,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-19 15:48:05,532 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 10.0) internal successors, (140), 13 states have internal predecessors, (140), 5 states have call successors, (60), 2 states have call predecessors, (60), 5 states have return successors, (56), 6 states have call predecessors, (56), 5 states have call successors, (56) Word has length 568 [2021-11-19 15:48:05,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:05,568 INFO L225 Difference]: With dead ends: 16328 [2021-11-19 15:48:05,568 INFO L226 Difference]: Without dead ends: 8396 [2021-11-19 15:48:05,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1147 GetRequests, 1111 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=186, Invalid=1220, Unknown=0, NotChecked=0, Total=1406 [2021-11-19 15:48:05,688 INFO L933 BasicCegarLoop]: 2653 mSDtfsCounter, 208 mSDsluCounter, 34063 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 36716 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:05,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 36716 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-19 15:48:05,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8396 states. [2021-11-19 15:48:06,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8396 to 7974. [2021-11-19 15:48:06,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7974 states, 4692 states have (on average 1.2199488491048593) internal successors, (5724), 4805 states have internal predecessors, (5724), 2826 states have call successors, (2826), 444 states have call predecessors, (2826), 454 states have return successors, (2854), 2788 states have call predecessors, (2854), 2826 states have call successors, (2854) [2021-11-19 15:48:06,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7974 states to 7974 states and 11404 transitions. [2021-11-19 15:48:06,393 INFO L78 Accepts]: Start accepts. Automaton has 7974 states and 11404 transitions. Word has length 568 [2021-11-19 15:48:06,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:06,394 INFO L470 AbstractCegarLoop]: Abstraction has 7974 states and 11404 transitions. [2021-11-19 15:48:06,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 10.0) internal successors, (140), 13 states have internal predecessors, (140), 5 states have call successors, (60), 2 states have call predecessors, (60), 5 states have return successors, (56), 6 states have call predecessors, (56), 5 states have call successors, (56) [2021-11-19 15:48:06,394 INFO L276 IsEmpty]: Start isEmpty. Operand 7974 states and 11404 transitions. [2021-11-19 15:48:06,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 653 [2021-11-19 15:48:06,405 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:06,406 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 17, 17, 17, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:48:06,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-19 15:48:06,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:48:06,629 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 15:48:06,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:06,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1983686394, now seen corresponding path program 1 times [2021-11-19 15:48:06,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:48:06,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [667246462] [2021-11-19 15:48:06,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:06,632 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:48:06,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:48:06,632 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:48:06,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-19 15:48:08,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:08,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 2877 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-19 15:48:08,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:48:14,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4463 backedges. 323 proven. 39 refuted. 0 times theorem prover too weak. 4101 trivial. 0 not checked. [2021-11-19 15:48:14,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:48:24,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4463 backedges. 19 proven. 75 refuted. 0 times theorem prover too weak. 4369 trivial. 0 not checked. [2021-11-19 15:48:24,291 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:48:24,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [667246462] [2021-11-19 15:48:24,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [667246462] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:48:24,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [890670929] [2021-11-19 15:48:24,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:24,291 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:48:24,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:48:24,292 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:48:24,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-19 15:48:28,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:28,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 2877 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 15:48:28,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:48:30,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4463 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 4436 trivial. 0 not checked. [2021-11-19 15:48:30,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:48:33,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4463 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 4442 trivial. 0 not checked. [2021-11-19 15:48:33,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [890670929] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:48:33,269 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:48:33,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [22, 21] total 46 [2021-11-19 15:48:33,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505370398] [2021-11-19 15:48:33,270 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:33,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 15:48:33,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:48:33,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 15:48:33,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1948, Unknown=0, NotChecked=0, Total=2070 [2021-11-19 15:48:33,272 INFO L87 Difference]: Start difference. First operand 7974 states and 11404 transitions. Second operand has 10 states, 10 states have (on average 16.6) internal successors, (166), 8 states have internal predecessors, (166), 4 states have call successors, (71), 2 states have call predecessors, (71), 4 states have return successors, (68), 6 states have call predecessors, (68), 4 states have call successors, (68) [2021-11-19 15:48:36,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:36,077 INFO L93 Difference]: Finished difference Result 16102 states and 23073 transitions. [2021-11-19 15:48:36,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:48:36,078 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 16.6) internal successors, (166), 8 states have internal predecessors, (166), 4 states have call successors, (71), 2 states have call predecessors, (71), 4 states have return successors, (68), 6 states have call predecessors, (68), 4 states have call successors, (68) Word has length 652 [2021-11-19 15:48:36,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:36,104 INFO L225 Difference]: With dead ends: 16102 [2021-11-19 15:48:36,105 INFO L226 Difference]: Without dead ends: 8162 [2021-11-19 15:48:36,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2605 GetRequests, 2560 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=129, Invalid=2033, Unknown=0, NotChecked=0, Total=2162 [2021-11-19 15:48:36,130 INFO L933 BasicCegarLoop]: 2604 mSDtfsCounter, 596 mSDsluCounter, 15221 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 17825 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:36,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [688 Valid, 17825 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-19 15:48:36,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8162 states. [2021-11-19 15:48:36,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8162 to 7974. [2021-11-19 15:48:36,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7974 states, 4692 states have (on average 1.2190963341858483) internal successors, (5720), 4801 states have internal predecessors, (5720), 2826 states have call successors, (2826), 444 states have call predecessors, (2826), 454 states have return successors, (2854), 2788 states have call predecessors, (2854), 2826 states have call successors, (2854) [2021-11-19 15:48:36,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7974 states to 7974 states and 11400 transitions. [2021-11-19 15:48:36,844 INFO L78 Accepts]: Start accepts. Automaton has 7974 states and 11400 transitions. Word has length 652 [2021-11-19 15:48:36,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:36,845 INFO L470 AbstractCegarLoop]: Abstraction has 7974 states and 11400 transitions. [2021-11-19 15:48:36,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 16.6) internal successors, (166), 8 states have internal predecessors, (166), 4 states have call successors, (71), 2 states have call predecessors, (71), 4 states have return successors, (68), 6 states have call predecessors, (68), 4 states have call successors, (68) [2021-11-19 15:48:36,845 INFO L276 IsEmpty]: Start isEmpty. Operand 7974 states and 11400 transitions. [2021-11-19 15:48:36,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2021-11-19 15:48:36,855 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:36,856 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 8, 8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:48:36,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2021-11-19 15:48:37,111 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2021-11-19 15:48:37,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:48:37,270 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 15:48:37,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:37,271 INFO L85 PathProgramCache]: Analyzing trace with hash 757358826, now seen corresponding path program 1 times [2021-11-19 15:48:37,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:48:37,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [662703452] [2021-11-19 15:48:37,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:37,273 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:48:37,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:48:37,274 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:48:37,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-19 15:48:39,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:39,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 2600 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-19 15:48:39,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:48:44,491 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 326 proven. 39 refuted. 0 times theorem prover too weak. 522 trivial. 0 not checked. [2021-11-19 15:48:44,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:48:53,884 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 19 proven. 75 refuted. 0 times theorem prover too weak. 793 trivial. 0 not checked. [2021-11-19 15:48:53,885 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:48:53,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [662703452] [2021-11-19 15:48:53,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [662703452] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:48:53,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1963275780] [2021-11-19 15:48:53,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:53,886 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:48:53,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:48:53,892 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:48:53,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-11-19 15:48:57,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:57,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 2600 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 15:48:57,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:48:59,873 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 305 proven. 0 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2021-11-19 15:48:59,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:49:02,563 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 884 trivial. 0 not checked. [2021-11-19 15:49:02,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1963275780] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:49:02,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-19 15:49:02,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [22, 21, 6] total 46 [2021-11-19 15:49:02,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37658005] [2021-11-19 15:49:02,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:49:02,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:49:02,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:49:02,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:49:02,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1949, Unknown=0, NotChecked=0, Total=2070 [2021-11-19 15:49:02,567 INFO L87 Difference]: Start difference. First operand 7974 states and 11400 transitions. Second operand has 6 states, 6 states have (on average 30.666666666666668) internal successors, (184), 5 states have internal predecessors, (184), 2 states have call successors, (61), 2 states have call predecessors, (61), 3 states have return successors, (57), 3 states have call predecessors, (57), 2 states have call successors, (57) [2021-11-19 15:49:03,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:49:03,562 INFO L93 Difference]: Finished difference Result 12737 states and 18278 transitions. [2021-11-19 15:49:03,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:49:03,563 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.666666666666668) internal successors, (184), 5 states have internal predecessors, (184), 2 states have call successors, (61), 2 states have call predecessors, (61), 3 states have return successors, (57), 3 states have call predecessors, (57), 2 states have call successors, (57) Word has length 434 [2021-11-19 15:49:03,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:49:03,594 INFO L225 Difference]: With dead ends: 12737 [2021-11-19 15:49:03,594 INFO L226 Difference]: Without dead ends: 7984 [2021-11-19 15:49:03,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1733 GetRequests, 1688 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=127, Invalid=2035, Unknown=0, NotChecked=0, Total=2162 [2021-11-19 15:49:03,611 INFO L933 BasicCegarLoop]: 2536 mSDtfsCounter, 2 mSDsluCounter, 10139 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 12675 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:49:03,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 12675 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:49:03,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7984 states. [2021-11-19 15:49:04,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7984 to 7984. [2021-11-19 15:49:04,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7984 states, 4700 states have (on average 1.2187234042553192) internal successors, (5728), 4809 states have internal predecessors, (5728), 2826 states have call successors, (2826), 444 states have call predecessors, (2826), 456 states have return successors, (2858), 2790 states have call predecessors, (2858), 2826 states have call successors, (2858) [2021-11-19 15:49:04,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7984 states to 7984 states and 11412 transitions. [2021-11-19 15:49:04,279 INFO L78 Accepts]: Start accepts. Automaton has 7984 states and 11412 transitions. Word has length 434 [2021-11-19 15:49:04,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:49:04,280 INFO L470 AbstractCegarLoop]: Abstraction has 7984 states and 11412 transitions. [2021-11-19 15:49:04,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.666666666666668) internal successors, (184), 5 states have internal predecessors, (184), 2 states have call successors, (61), 2 states have call predecessors, (61), 3 states have return successors, (57), 3 states have call predecessors, (57), 2 states have call successors, (57) [2021-11-19 15:49:04,280 INFO L276 IsEmpty]: Start isEmpty. Operand 7984 states and 11412 transitions. [2021-11-19 15:49:04,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2021-11-19 15:49:04,288 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:49:04,289 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 8, 8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:49:04,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-19 15:49:04,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2021-11-19 15:49:04,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:49:04,700 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 15:49:04,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:49:04,701 INFO L85 PathProgramCache]: Analyzing trace with hash 86559012, now seen corresponding path program 1 times [2021-11-19 15:49:04,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:49:04,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2139165349] [2021-11-19 15:49:04,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:49:04,703 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:49:04,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:49:04,704 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:49:04,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-19 15:49:07,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:49:07,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 2662 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-19 15:49:07,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:49:12,170 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 326 proven. 39 refuted. 0 times theorem prover too weak. 522 trivial. 0 not checked. [2021-11-19 15:49:12,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:49:21,937 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 19 proven. 75 refuted. 0 times theorem prover too weak. 793 trivial. 0 not checked. [2021-11-19 15:49:21,937 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:49:21,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2139165349] [2021-11-19 15:49:21,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2139165349] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:49:21,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2041633103] [2021-11-19 15:49:21,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:49:21,938 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:49:21,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:49:21,939 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:49:21,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-11-19 15:49:23,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:49:23,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 2662 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 15:49:23,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:49:25,398 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 302 proven. 0 refuted. 0 times theorem prover too weak. 585 trivial. 0 not checked. [2021-11-19 15:49:25,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:49:26,811 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 884 trivial. 0 not checked. [2021-11-19 15:49:26,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2041633103] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:49:26,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-19 15:49:26,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [22, 21, 4] total 44 [2021-11-19 15:49:26,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690295178] [2021-11-19 15:49:26,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:49:26,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:49:26,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:49:26,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:49:26,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1777, Unknown=0, NotChecked=0, Total=1892 [2021-11-19 15:49:26,814 INFO L87 Difference]: Start difference. First operand 7984 states and 11412 transitions. Second operand has 6 states, 6 states have (on average 32.0) internal successors, (192), 6 states have internal predecessors, (192), 3 states have call successors, (61), 2 states have call predecessors, (61), 2 states have return successors, (57), 3 states have call predecessors, (57), 3 states have call successors, (57) [2021-11-19 15:49:28,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:49:28,420 INFO L93 Difference]: Finished difference Result 12777 states and 18328 transitions. [2021-11-19 15:49:28,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:49:28,422 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 32.0) internal successors, (192), 6 states have internal predecessors, (192), 3 states have call successors, (61), 2 states have call predecessors, (61), 2 states have return successors, (57), 3 states have call predecessors, (57), 3 states have call successors, (57) Word has length 444 [2021-11-19 15:49:28,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:49:28,459 INFO L225 Difference]: With dead ends: 12777 [2021-11-19 15:49:28,459 INFO L226 Difference]: Without dead ends: 8014 [2021-11-19 15:49:28,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1774 GetRequests, 1730 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=124, Invalid=1946, Unknown=0, NotChecked=0, Total=2070 [2021-11-19 15:49:28,478 INFO L933 BasicCegarLoop]: 2538 mSDtfsCounter, 44 mSDsluCounter, 10091 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 12629 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 15:49:28,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 12629 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 15:49:28,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8014 states. [2021-11-19 15:49:29,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8014 to 7986. [2021-11-19 15:49:29,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7986 states, 4702 states have (on average 1.2186303700552956) internal successors, (5730), 4811 states have internal predecessors, (5730), 2826 states have call successors, (2826), 444 states have call predecessors, (2826), 456 states have return successors, (2858), 2790 states have call predecessors, (2858), 2826 states have call successors, (2858) [2021-11-19 15:49:29,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7986 states to 7986 states and 11414 transitions. [2021-11-19 15:49:29,233 INFO L78 Accepts]: Start accepts. Automaton has 7986 states and 11414 transitions. Word has length 444 [2021-11-19 15:49:29,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:49:29,234 INFO L470 AbstractCegarLoop]: Abstraction has 7986 states and 11414 transitions. [2021-11-19 15:49:29,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 32.0) internal successors, (192), 6 states have internal predecessors, (192), 3 states have call successors, (61), 2 states have call predecessors, (61), 2 states have return successors, (57), 3 states have call predecessors, (57), 3 states have call successors, (57) [2021-11-19 15:49:29,234 INFO L276 IsEmpty]: Start isEmpty. Operand 7986 states and 11414 transitions. [2021-11-19 15:49:29,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2021-11-19 15:49:29,242 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:49:29,242 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 8, 8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:49:29,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-11-19 15:49:29,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2021-11-19 15:49:29,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:49:29,643 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 15:49:29,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:49:29,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1560803930, now seen corresponding path program 1 times [2021-11-19 15:49:29,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:49:29,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1239323954] [2021-11-19 15:49:29,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:49:29,647 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:49:29,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:49:29,647 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:49:29,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-19 15:49:32,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:49:32,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 2660 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-19 15:49:32,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:49:37,692 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 326 proven. 39 refuted. 0 times theorem prover too weak. 522 trivial. 0 not checked. [2021-11-19 15:49:37,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:49:47,421 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 19 proven. 75 refuted. 0 times theorem prover too weak. 793 trivial. 0 not checked. [2021-11-19 15:49:47,421 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:49:47,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1239323954] [2021-11-19 15:49:47,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1239323954] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:49:47,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [267200087] [2021-11-19 15:49:47,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:49:47,422 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:49:47,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:49:47,423 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:49:47,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2021-11-19 15:49:51,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:49:51,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 2660 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 15:49:51,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:49:53,715 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 286 proven. 0 refuted. 0 times theorem prover too weak. 601 trivial. 0 not checked. [2021-11-19 15:49:53,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:49:56,327 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 884 trivial. 0 not checked. [2021-11-19 15:49:56,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [267200087] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:49:56,328 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:49:56,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [22, 21] total 46 [2021-11-19 15:49:56,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848925393] [2021-11-19 15:49:56,329 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:49:56,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 15:49:56,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:49:56,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 15:49:56,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1949, Unknown=0, NotChecked=0, Total=2070 [2021-11-19 15:49:56,333 INFO L87 Difference]: Start difference. First operand 7986 states and 11414 transitions. Second operand has 10 states, 10 states have (on average 18.5) internal successors, (185), 8 states have internal predecessors, (185), 2 states have call successors, (67), 2 states have call predecessors, (67), 4 states have return successors, (64), 4 states have call predecessors, (64), 2 states have call successors, (64) [2021-11-19 15:49:58,901 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:49:59,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:49:59,594 INFO L93 Difference]: Finished difference Result 12755 states and 18298 transitions. [2021-11-19 15:49:59,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:49:59,619 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 18.5) internal successors, (185), 8 states have internal predecessors, (185), 2 states have call successors, (67), 2 states have call predecessors, (67), 4 states have return successors, (64), 4 states have call predecessors, (64), 2 states have call successors, (64) Word has length 444 [2021-11-19 15:49:59,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:49:59,649 INFO L225 Difference]: With dead ends: 12755 [2021-11-19 15:49:59,650 INFO L226 Difference]: Without dead ends: 7990 [2021-11-19 15:49:59,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1773 GetRequests, 1728 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=127, Invalid=2035, Unknown=0, NotChecked=0, Total=2162 [2021-11-19 15:49:59,668 INFO L933 BasicCegarLoop]: 2536 mSDtfsCounter, 4 mSDsluCounter, 15210 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 17746 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:49:59,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 17746 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-11-19 15:49:59,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7990 states. [2021-11-19 15:50:00,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7990 to 7990. [2021-11-19 15:50:00,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7990 states, 4706 states have (on average 1.218444538886528) internal successors, (5734), 4813 states have internal predecessors, (5734), 2826 states have call successors, (2826), 444 states have call predecessors, (2826), 456 states have return successors, (2858), 2792 states have call predecessors, (2858), 2826 states have call successors, (2858) [2021-11-19 15:50:00,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7990 states to 7990 states and 11418 transitions. [2021-11-19 15:50:00,370 INFO L78 Accepts]: Start accepts. Automaton has 7990 states and 11418 transitions. Word has length 444 [2021-11-19 15:50:00,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:50:00,371 INFO L470 AbstractCegarLoop]: Abstraction has 7990 states and 11418 transitions. [2021-11-19 15:50:00,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.5) internal successors, (185), 8 states have internal predecessors, (185), 2 states have call successors, (67), 2 states have call predecessors, (67), 4 states have return successors, (64), 4 states have call predecessors, (64), 2 states have call successors, (64) [2021-11-19 15:50:00,371 INFO L276 IsEmpty]: Start isEmpty. Operand 7990 states and 11418 transitions. [2021-11-19 15:50:00,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 668 [2021-11-19 15:50:00,382 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:00,383 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 20, 20, 20, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:50:00,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-11-19 15:50:00,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2021-11-19 15:50:00,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:50:00,784 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 15:50:00,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:00,784 INFO L85 PathProgramCache]: Analyzing trace with hash -240175726, now seen corresponding path program 1 times [2021-11-19 15:50:00,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:50:00,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1112045136] [2021-11-19 15:50:00,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:00,786 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:50:00,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:50:00,787 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:50:00,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-19 15:50:02,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:02,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 2769 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 15:50:02,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:04,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 493 proven. 3 refuted. 0 times theorem prover too weak. 4208 trivial. 0 not checked. [2021-11-19 15:50:04,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:07,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 39 proven. 24 refuted. 0 times theorem prover too weak. 4641 trivial. 0 not checked. [2021-11-19 15:50:07,229 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:50:07,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1112045136] [2021-11-19 15:50:07,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1112045136] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:50:07,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1244995823] [2021-11-19 15:50:07,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:07,230 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:50:07,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:50:07,231 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:50:07,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2021-11-19 15:50:10,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:10,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 2769 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 15:50:10,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:12,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 461 proven. 0 refuted. 0 times theorem prover too weak. 4243 trivial. 0 not checked. [2021-11-19 15:50:12,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:14,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4697 trivial. 0 not checked. [2021-11-19 15:50:14,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1244995823] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:50:14,974 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:50:14,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [9, 9] total 15 [2021-11-19 15:50:14,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338398937] [2021-11-19 15:50:14,975 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:50:14,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 15:50:14,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:50:14,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 15:50:14,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-11-19 15:50:14,977 INFO L87 Difference]: Start difference. First operand 7990 states and 11418 transitions. Second operand has 12 states, 12 states have (on average 15.333333333333334) internal successors, (184), 10 states have internal predecessors, (184), 4 states have call successors, (96), 2 states have call predecessors, (96), 4 states have return successors, (93), 6 states have call predecessors, (93), 4 states have call successors, (93) [2021-11-19 15:50:17,177 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:50:19,197 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:50:21,224 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:50:22,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:50:22,645 INFO L93 Difference]: Finished difference Result 15954 states and 22809 transitions. [2021-11-19 15:50:22,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 15:50:22,646 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 15.333333333333334) internal successors, (184), 10 states have internal predecessors, (184), 4 states have call successors, (96), 2 states have call predecessors, (96), 4 states have return successors, (93), 6 states have call predecessors, (93), 4 states have call successors, (93) Word has length 667 [2021-11-19 15:50:22,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:50:22,679 INFO L225 Difference]: With dead ends: 15954 [2021-11-19 15:50:22,680 INFO L226 Difference]: Without dead ends: 7998 [2021-11-19 15:50:22,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2666 GetRequests, 2651 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-11-19 15:50:22,708 INFO L933 BasicCegarLoop]: 2552 mSDtfsCounter, 640 mSDsluCounter, 19884 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 372 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 640 SdHoareTripleChecker+Valid, 22436 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2021-11-19 15:50:22,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [640 Valid, 22436 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 38 Invalid, 3 Unknown, 0 Unchecked, 6.6s Time] [2021-11-19 15:50:22,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7998 states. [2021-11-19 15:50:23,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7998 to 7990. [2021-11-19 15:50:23,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7990 states, 4706 states have (on average 1.2175945601359965) internal successors, (5730), 4813 states have internal predecessors, (5730), 2826 states have call successors, (2826), 444 states have call predecessors, (2826), 456 states have return successors, (2858), 2792 states have call predecessors, (2858), 2826 states have call successors, (2858) [2021-11-19 15:50:23,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7990 states to 7990 states and 11414 transitions. [2021-11-19 15:50:23,516 INFO L78 Accepts]: Start accepts. Automaton has 7990 states and 11414 transitions. Word has length 667 [2021-11-19 15:50:23,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:50:23,517 INFO L470 AbstractCegarLoop]: Abstraction has 7990 states and 11414 transitions. [2021-11-19 15:50:23,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 15.333333333333334) internal successors, (184), 10 states have internal predecessors, (184), 4 states have call successors, (96), 2 states have call predecessors, (96), 4 states have return successors, (93), 6 states have call predecessors, (93), 4 states have call successors, (93) [2021-11-19 15:50:23,517 INFO L276 IsEmpty]: Start isEmpty. Operand 7990 states and 11414 transitions. [2021-11-19 15:50:23,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 652 [2021-11-19 15:50:23,529 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:23,529 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 18, 18, 18, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:50:23,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2021-11-19 15:50:23,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-11-19 15:50:23,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:50:23,930 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 15:50:23,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:23,931 INFO L85 PathProgramCache]: Analyzing trace with hash -57308690, now seen corresponding path program 1 times [2021-11-19 15:50:23,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:50:23,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1048420324] [2021-11-19 15:50:23,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:23,933 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:50:23,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:50:23,935 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:50:24,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-19 15:50:26,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:26,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 2737 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-19 15:50:26,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:28,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4533 backedges. 387 proven. 0 refuted. 0 times theorem prover too weak. 4146 trivial. 0 not checked. [2021-11-19 15:50:28,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:31,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4533 backedges. 36 proven. 23 refuted. 0 times theorem prover too weak. 4474 trivial. 0 not checked. [2021-11-19 15:50:31,954 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:50:31,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1048420324] [2021-11-19 15:50:31,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1048420324] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:50:31,955 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:50:31,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [16] total 29 [2021-11-19 15:50:31,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809927408] [2021-11-19 15:50:31,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:50:31,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-19 15:50:31,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:50:31,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-19 15:50:31,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=743, Unknown=0, NotChecked=0, Total=812 [2021-11-19 15:50:31,958 INFO L87 Difference]: Start difference. First operand 7990 states and 11414 transitions. Second operand has 16 states, 15 states have (on average 11.333333333333334) internal successors, (170), 14 states have internal predecessors, (170), 6 states have call successors, (74), 2 states have call predecessors, (74), 5 states have return successors, (70), 7 states have call predecessors, (70), 6 states have call successors, (70) [2021-11-19 15:50:37,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:50:37,647 INFO L93 Difference]: Finished difference Result 13739 states and 19629 transitions. [2021-11-19 15:50:37,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-19 15:50:37,648 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 11.333333333333334) internal successors, (170), 14 states have internal predecessors, (170), 6 states have call successors, (74), 2 states have call predecessors, (74), 5 states have return successors, (70), 7 states have call predecessors, (70), 6 states have call successors, (70) Word has length 651 [2021-11-19 15:50:37,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:50:37,675 INFO L225 Difference]: With dead ends: 13739 [2021-11-19 15:50:37,675 INFO L226 Difference]: Without dead ends: 5779 [2021-11-19 15:50:37,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1320 GetRequests, 1276 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=266, Invalid=1804, Unknown=0, NotChecked=0, Total=2070 [2021-11-19 15:50:37,708 INFO L933 BasicCegarLoop]: 2654 mSDtfsCounter, 222 mSDsluCounter, 36725 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 39379 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:50:37,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 39379 Invalid, 865 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [154 Valid, 711 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-19 15:50:37,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5779 states. [2021-11-19 15:50:38,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5779 to 5235. [2021-11-19 15:50:38,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5235 states, 3070 states have (on average 1.20814332247557) internal successors, (3709), 3131 states have internal predecessors, (3709), 1869 states have call successors, (1869), 286 states have call predecessors, (1869), 294 states have return successors, (1891), 1855 states have call predecessors, (1891), 1869 states have call successors, (1891) [2021-11-19 15:50:38,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5235 states to 5235 states and 7469 transitions. [2021-11-19 15:50:38,428 INFO L78 Accepts]: Start accepts. Automaton has 5235 states and 7469 transitions. Word has length 651 [2021-11-19 15:50:38,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:50:38,429 INFO L470 AbstractCegarLoop]: Abstraction has 5235 states and 7469 transitions. [2021-11-19 15:50:38,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 11.333333333333334) internal successors, (170), 14 states have internal predecessors, (170), 6 states have call successors, (74), 2 states have call predecessors, (74), 5 states have return successors, (70), 7 states have call predecessors, (70), 6 states have call successors, (70) [2021-11-19 15:50:38,429 INFO L276 IsEmpty]: Start isEmpty. Operand 5235 states and 7469 transitions. [2021-11-19 15:50:38,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2021-11-19 15:50:38,437 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:38,438 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 8, 8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:50:38,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-11-19 15:50:38,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:50:38,639 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 15:50:38,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:38,639 INFO L85 PathProgramCache]: Analyzing trace with hash -47289750, now seen corresponding path program 1 times [2021-11-19 15:50:38,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:50:38,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [176864950] [2021-11-19 15:50:38,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:38,641 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:50:38,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:50:38,642 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:50:38,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-19 15:50:41,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:41,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 2720 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-19 15:50:41,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:46,512 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 336 proven. 39 refuted. 0 times theorem prover too weak. 522 trivial. 0 not checked. [2021-11-19 15:50:46,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:56,253 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 19 proven. 85 refuted. 0 times theorem prover too weak. 793 trivial. 0 not checked. [2021-11-19 15:50:56,253 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:50:56,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [176864950] [2021-11-19 15:50:56,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [176864950] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:50:56,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [355327310] [2021-11-19 15:50:56,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:56,254 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:50:56,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:50:56,254 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:50:56,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2021-11-19 15:51:08,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:51:08,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 2720 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 15:51:08,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:51:12,564 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 897 trivial. 0 not checked. [2021-11-19 15:51:12,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:51:14,573 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 897 trivial. 0 not checked. [2021-11-19 15:51:14,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [355327310] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:51:14,574 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:51:14,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [22, 21] total 43 [2021-11-19 15:51:14,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087500779] [2021-11-19 15:51:14,575 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:51:14,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 15:51:14,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:51:14,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 15:51:14,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1693, Unknown=0, NotChecked=0, Total=1806 [2021-11-19 15:51:14,577 INFO L87 Difference]: Start difference. First operand 5235 states and 7469 transitions. Second operand has 7 states, 7 states have (on average 33.714285714285715) internal successors, (236), 5 states have internal predecessors, (236), 2 states have call successors, (109), 4 states have call predecessors, (109), 2 states have return successors, (104), 2 states have call predecessors, (104), 2 states have call successors, (104) [2021-11-19 15:51:15,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:51:15,304 INFO L93 Difference]: Finished difference Result 5235 states and 7469 transitions. [2021-11-19 15:51:15,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 15:51:15,305 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 33.714285714285715) internal successors, (236), 5 states have internal predecessors, (236), 2 states have call successors, (109), 4 states have call predecessors, (109), 2 states have return successors, (104), 2 states have call predecessors, (104), 2 states have call successors, (104) Word has length 454 [2021-11-19 15:51:15,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:51:15,330 INFO L225 Difference]: With dead ends: 5235 [2021-11-19 15:51:15,330 INFO L226 Difference]: Without dead ends: 5233 [2021-11-19 15:51:15,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1814 GetRequests, 1771 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=126, Invalid=1854, Unknown=0, NotChecked=0, Total=1980 [2021-11-19 15:51:15,335 INFO L933 BasicCegarLoop]: 3126 mSDtfsCounter, 1582 mSDsluCounter, 14106 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1583 SdHoareTripleChecker+Valid, 17232 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:51:15,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1583 Valid, 17232 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 15:51:15,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5233 states. [2021-11-19 15:51:15,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5233 to 5233. [2021-11-19 15:51:15,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5233 states, 3069 states have (on average 1.2075594656239816) internal successors, (3706), 3129 states have internal predecessors, (3706), 1869 states have call successors, (1869), 286 states have call predecessors, (1869), 294 states have return successors, (1891), 1855 states have call predecessors, (1891), 1869 states have call successors, (1891) [2021-11-19 15:51:15,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5233 states to 5233 states and 7466 transitions. [2021-11-19 15:51:15,876 INFO L78 Accepts]: Start accepts. Automaton has 5233 states and 7466 transitions. Word has length 454 [2021-11-19 15:51:15,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:51:15,877 INFO L470 AbstractCegarLoop]: Abstraction has 5233 states and 7466 transitions. [2021-11-19 15:51:15,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 33.714285714285715) internal successors, (236), 5 states have internal predecessors, (236), 2 states have call successors, (109), 4 states have call predecessors, (109), 2 states have return successors, (104), 2 states have call predecessors, (104), 2 states have call successors, (104) [2021-11-19 15:51:15,877 INFO L276 IsEmpty]: Start isEmpty. Operand 5233 states and 7466 transitions. [2021-11-19 15:51:15,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 708 [2021-11-19 15:51:15,886 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:51:15,886 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 18, 18, 18, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:51:15,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-11-19 15:51:16,105 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (46)] Ended with exit code 0 [2021-11-19 15:51:16,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:51:16,290 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 15:51:16,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:51:16,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1123885302, now seen corresponding path program 1 times [2021-11-19 15:51:16,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:51:16,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [783884712] [2021-11-19 15:51:16,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:51:16,292 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:51:16,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:51:16,294 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:51:16,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-11-19 15:51:18,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:51:18,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 2957 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-19 15:51:18,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:51:23,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4574 backedges. 406 proven. 39 refuted. 0 times theorem prover too weak. 4129 trivial. 0 not checked. [2021-11-19 15:51:23,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:51:33,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4574 backedges. 19 proven. 88 refuted. 0 times theorem prover too weak. 4467 trivial. 0 not checked. [2021-11-19 15:51:33,523 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:51:33,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [783884712] [2021-11-19 15:51:33,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [783884712] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:51:33,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1627892316] [2021-11-19 15:51:33,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:51:33,524 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:51:33,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:51:33,525 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:51:33,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2021-11-19 15:51:34,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:51:34,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 2957 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-19 15:51:34,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:51:40,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4574 backedges. 314 proven. 7 refuted. 0 times theorem prover too weak. 4253 trivial. 0 not checked. [2021-11-19 15:51:40,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:51:45,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4574 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4574 trivial. 0 not checked. [2021-11-19 15:51:45,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1627892316] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:51:45,178 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-19 15:51:45,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [22, 21, 14] total 56 [2021-11-19 15:51:45,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174028396] [2021-11-19 15:51:45,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:51:45,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 15:51:45,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:51:45,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 15:51:45,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=2935, Unknown=0, NotChecked=0, Total=3080 [2021-11-19 15:51:45,181 INFO L87 Difference]: Start difference. First operand 5233 states and 7466 transitions. Second operand has 9 states, 8 states have (on average 22.75) internal successors, (182), 9 states have internal predecessors, (182), 5 states have call successors, (70), 2 states have call predecessors, (70), 2 states have return successors, (66), 4 states have call predecessors, (66), 5 states have call successors, (66) [2021-11-19 15:51:47,726 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:51:51,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:51:51,418 INFO L93 Difference]: Finished difference Result 10188 states and 14635 transitions. [2021-11-19 15:51:51,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 15:51:51,420 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 22.75) internal successors, (182), 9 states have internal predecessors, (182), 5 states have call successors, (70), 2 states have call predecessors, (70), 2 states have return successors, (66), 4 states have call predecessors, (66), 5 states have call successors, (66) Word has length 707 [2021-11-19 15:51:51,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:51:51,442 INFO L225 Difference]: With dead ends: 10188 [2021-11-19 15:51:51,442 INFO L226 Difference]: Without dead ends: 5425 [2021-11-19 15:51:51,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2827 GetRequests, 2770 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=163, Invalid=3259, Unknown=0, NotChecked=0, Total=3422 [2021-11-19 15:51:51,459 INFO L933 BasicCegarLoop]: 2660 mSDtfsCounter, 863 mSDsluCounter, 14684 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 466 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 964 SdHoareTripleChecker+Valid, 17344 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 466 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-11-19 15:51:51,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [964 Valid, 17344 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [466 Valid, 197 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2021-11-19 15:51:51,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5425 states. [2021-11-19 15:51:51,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5425 to 5237. [2021-11-19 15:51:51,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5237 states, 3071 states have (on average 1.2074242917616411) internal successors, (3708), 3133 states have internal predecessors, (3708), 1869 states have call successors, (1869), 286 states have call predecessors, (1869), 296 states have return successors, (1893), 1855 states have call predecessors, (1893), 1869 states have call successors, (1893) [2021-11-19 15:51:51,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5237 states to 5237 states and 7470 transitions. [2021-11-19 15:51:51,937 INFO L78 Accepts]: Start accepts. Automaton has 5237 states and 7470 transitions. Word has length 707 [2021-11-19 15:51:51,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:51:51,938 INFO L470 AbstractCegarLoop]: Abstraction has 5237 states and 7470 transitions. [2021-11-19 15:51:51,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 22.75) internal successors, (182), 9 states have internal predecessors, (182), 5 states have call successors, (70), 2 states have call predecessors, (70), 2 states have return successors, (66), 4 states have call predecessors, (66), 5 states have call successors, (66) [2021-11-19 15:51:51,939 INFO L276 IsEmpty]: Start isEmpty. Operand 5237 states and 7470 transitions. [2021-11-19 15:51:51,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2021-11-19 15:51:51,945 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:51:51,946 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 8, 8, 8, 8, 8, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:51:51,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2021-11-19 15:51:52,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (48)] Forceful destruction successful, exit code 0 [2021-11-19 15:51:52,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:51:52,346 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 15:51:52,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:51:52,347 INFO L85 PathProgramCache]: Analyzing trace with hash 287267539, now seen corresponding path program 1 times [2021-11-19 15:51:52,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:51:52,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [548577819] [2021-11-19 15:51:52,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:51:52,350 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:51:52,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:51:52,351 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:51:52,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-11-19 15:51:54,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:51:54,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 2683 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-19 15:51:54,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:51:59,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 409 proven. 39 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2021-11-19 15:51:59,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:52:09,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 19 proven. 88 refuted. 0 times theorem prover too weak. 894 trivial. 0 not checked. [2021-11-19 15:52:09,209 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:52:09,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [548577819] [2021-11-19 15:52:09,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [548577819] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:52:09,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [756970638] [2021-11-19 15:52:09,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:52:09,210 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:52:09,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:52:09,211 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:52:09,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2021-11-19 15:52:13,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:52:13,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 2683 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 15:52:13,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:52:15,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2021-11-19 15:52:15,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:52:18,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 980 trivial. 0 not checked. [2021-11-19 15:52:18,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [756970638] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:52:18,215 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:52:18,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [22, 21] total 46 [2021-11-19 15:52:18,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043184444] [2021-11-19 15:52:18,216 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:52:18,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 15:52:18,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:52:18,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 15:52:18,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1948, Unknown=0, NotChecked=0, Total=2070 [2021-11-19 15:52:18,218 INFO L87 Difference]: Start difference. First operand 5237 states and 7470 transitions. Second operand has 10 states, 10 states have (on average 20.6) internal successors, (206), 8 states have internal predecessors, (206), 4 states have call successors, (75), 2 states have call predecessors, (75), 4 states have return successors, (72), 6 states have call predecessors, (72), 4 states have call successors, (72) [2021-11-19 15:52:19,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:52:19,216 INFO L93 Difference]: Finished difference Result 10160 states and 14587 transitions. [2021-11-19 15:52:19,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:52:19,217 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 20.6) internal successors, (206), 8 states have internal predecessors, (206), 4 states have call successors, (75), 2 states have call predecessors, (75), 4 states have return successors, (72), 6 states have call predecessors, (72), 4 states have call successors, (72) Word has length 491 [2021-11-19 15:52:19,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:52:19,243 INFO L225 Difference]: With dead ends: 10160 [2021-11-19 15:52:19,243 INFO L226 Difference]: Without dead ends: 5393 [2021-11-19 15:52:19,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1961 GetRequests, 1916 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=129, Invalid=2033, Unknown=0, NotChecked=0, Total=2162 [2021-11-19 15:52:19,266 INFO L933 BasicCegarLoop]: 2653 mSDtfsCounter, 127 mSDsluCounter, 18151 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 20804 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:52:19,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 20804 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:52:19,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5393 states. [2021-11-19 15:52:19,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5393 to 5237. [2021-11-19 15:52:19,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5237 states, 3071 states have (on average 1.2067730380983392) internal successors, (3706), 3133 states have internal predecessors, (3706), 1869 states have call successors, (1869), 286 states have call predecessors, (1869), 296 states have return successors, (1893), 1855 states have call predecessors, (1893), 1869 states have call successors, (1893) [2021-11-19 15:52:19,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5237 states to 5237 states and 7468 transitions. [2021-11-19 15:52:19,994 INFO L78 Accepts]: Start accepts. Automaton has 5237 states and 7468 transitions. Word has length 491 [2021-11-19 15:52:19,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:52:19,994 INFO L470 AbstractCegarLoop]: Abstraction has 5237 states and 7468 transitions. [2021-11-19 15:52:19,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.6) internal successors, (206), 8 states have internal predecessors, (206), 4 states have call successors, (75), 2 states have call predecessors, (75), 4 states have return successors, (72), 6 states have call predecessors, (72), 4 states have call successors, (72) [2021-11-19 15:52:19,995 INFO L276 IsEmpty]: Start isEmpty. Operand 5237 states and 7468 transitions. [2021-11-19 15:52:20,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 718 [2021-11-19 15:52:20,005 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:52:20,005 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 18, 18, 18, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:52:20,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (50)] Forceful destruction successful, exit code 0 [2021-11-19 15:52:20,262 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (49)] Ended with exit code 0 [2021-11-19 15:52:20,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:52:20,407 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 15:52:20,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:52:20,408 INFO L85 PathProgramCache]: Analyzing trace with hash -95160055, now seen corresponding path program 1 times [2021-11-19 15:52:20,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:52:20,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [540766158] [2021-11-19 15:52:20,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:52:20,410 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:52:20,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:52:20,411 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:52:20,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-11-19 15:52:22,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:52:22,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 2987 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-19 15:52:22,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:52:28,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4583 backedges. 412 proven. 39 refuted. 0 times theorem prover too weak. 4132 trivial. 0 not checked. [2021-11-19 15:52:28,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:52:39,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4583 backedges. 19 proven. 88 refuted. 0 times theorem prover too weak. 4476 trivial. 0 not checked. [2021-11-19 15:52:39,378 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:52:39,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [540766158] [2021-11-19 15:52:39,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [540766158] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:52:39,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1793737908] [2021-11-19 15:52:39,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:52:39,379 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:52:39,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:52:39,380 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:52:39,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2021-11-19 15:52:43,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:52:44,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 2987 conjuncts, 88 conjunts are in the unsatisfiable core [2021-11-19 15:52:44,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:52:52,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-19 15:52:52,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-19 15:52:53,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-11-19 15:52:53,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-11-19 15:52:55,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4583 backedges. 93 proven. 7 refuted. 0 times theorem prover too weak. 4483 trivial. 0 not checked. [2021-11-19 15:52:55,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:53:10,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4583 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4577 trivial. 0 not checked. [2021-11-19 15:53:10,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1793737908] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:53:10,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116597235] [2021-11-19 15:53:10,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:53:10,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:53:10,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:53:10,645 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:53:10,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-19 15:53:12,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:53:12,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 2987 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 15:53:12,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:53:14,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4583 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4583 trivial. 0 not checked. [2021-11-19 15:53:14,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:53:17,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4583 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4583 trivial. 0 not checked. [2021-11-19 15:53:17,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116597235] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:53:17,317 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-19 15:53:17,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [22, 21, 26, 16] total 79 [2021-11-19 15:53:17,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926770013] [2021-11-19 15:53:17,318 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:53:17,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 15:53:17,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:53:17,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 15:53:17,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=5954, Unknown=0, NotChecked=0, Total=6162 [2021-11-19 15:53:17,322 INFO L87 Difference]: Start difference. First operand 5237 states and 7468 transitions. Second operand has 7 states, 7 states have (on average 26.857142857142858) internal successors, (188), 5 states have internal predecessors, (188), 2 states have call successors, (74), 4 states have call predecessors, (74), 2 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) [2021-11-19 15:53:19,448 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 [] [2021-11-19 15:53:20,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:53:20,895 INFO L93 Difference]: Finished difference Result 5237 states and 7468 transitions. [2021-11-19 15:53:20,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 15:53:20,896 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 26.857142857142858) internal successors, (188), 5 states have internal predecessors, (188), 2 states have call successors, (74), 4 states have call predecessors, (74), 2 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) Word has length 717 [2021-11-19 15:53:20,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:53:20,897 INFO L225 Difference]: With dead ends: 5237 [2021-11-19 15:53:20,897 INFO L226 Difference]: Without dead ends: 0 [2021-11-19 15:53:20,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4298 GetRequests, 4219 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1246 ImplicationChecksByTransitivity, 31.2s TimeCoverageRelationStatistics Valid=221, Invalid=6259, Unknown=0, NotChecked=0, Total=6480 [2021-11-19 15:53:20,913 INFO L933 BasicCegarLoop]: 3057 mSDtfsCounter, 1598 mSDsluCounter, 11008 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1599 SdHoareTripleChecker+Valid, 14065 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:53:20,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1599 Valid, 14065 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-11-19 15:53:20,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-19 15:53:20,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-19 15:53:20,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:53:20,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-19 15:53:20,915 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 717 [2021-11-19 15:53:20,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:53:20,916 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-19 15:53:20,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 26.857142857142858) internal successors, (188), 5 states have internal predecessors, (188), 2 states have call successors, (74), 4 states have call predecessors, (74), 2 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) [2021-11-19 15:53:20,916 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-19 15:53:20,916 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-19 15:53:20,919 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2021-11-19 15:53:20,919 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2021-11-19 15:53:20,920 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2021-11-19 15:53:20,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2021-11-19 15:53:21,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (52)] Forceful destruction successful, exit code 0 [2021-11-19 15:53:21,383 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-11-19 15:53:21,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85528cdc-2134-49a8-8c46-5f0009474e3f/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:53:21,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-19 15:53:56,600 WARN L227 SmtUtils]: Spent 13.91s on a formula simplification that was a NOOP. DAG size: 243 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-19 15:54:17,329 WARN L227 SmtUtils]: Spent 13.41s on a formula simplification that was a NOOP. DAG size: 248 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)