./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 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/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_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 6c1be66de5de44f99e184f931232a9d8bcb0b8fd4712efbcede070913355a2c0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:43:51,746 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:43:51,749 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:43:51,804 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:43:51,804 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:43:51,809 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:43:51,811 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:43:51,815 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:43:51,818 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:43:51,824 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:43:51,825 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:43:51,827 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:43:51,828 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:43:51,830 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:43:51,832 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:43:51,836 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:43:51,838 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:43:51,839 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:43:51,842 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:43:51,850 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:43:51,852 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:43:51,853 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:43:51,857 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:43:51,858 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:43:51,867 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:43:51,867 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:43:51,868 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:43:51,870 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:43:51,871 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:43:51,872 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:43:51,873 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:43:51,874 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:43:51,876 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:43:51,877 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:43:51,879 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:43:51,879 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:43:51,880 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:43:51,881 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:43:51,881 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:43:51,882 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:43:51,883 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:43:51,884 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-12 23:43:51,926 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:43:51,927 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:43:51,929 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:43:51,929 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:43:51,930 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:43:51,930 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:43:51,930 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:43:51,930 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:43:51,931 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:43:51,931 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:43:51,932 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:43:51,933 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:43:51,933 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:43:51,933 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:43:51,933 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:43:51,934 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:43:51,935 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:43:51,935 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:43:51,935 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:43:51,936 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:43:51,936 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:43:51,936 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:43:51,936 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:43:51,937 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:43:51,937 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:43:51,937 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:43:51,938 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:43:51,938 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:43:51,938 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:43:51,940 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:43:51,940 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:43:51,941 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:43:51,941 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:43:51,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:43:51,942 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:43:51,942 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:43:51,942 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:43:51,942 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_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c1be66de5de44f99e184f931232a9d8bcb0b8fd4712efbcede070913355a2c0 [2021-11-12 23:43:52,242 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:43:52,272 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:43:52,276 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:43:52,277 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:43:52,278 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:43:52,280 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-irda-via-ircc.cil.i [2021-11-12 23:43:52,373 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/data/23260ba2f/4c2fcdf7d4d84c6290c1ec75dee5b707/FLAG007b97b78 [2021-11-12 23:43:53,300 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:43:53,302 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-irda-via-ircc.cil.i [2021-11-12 23:43:53,360 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/data/23260ba2f/4c2fcdf7d4d84c6290c1ec75dee5b707/FLAG007b97b78 [2021-11-12 23:43:53,696 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/data/23260ba2f/4c2fcdf7d4d84c6290c1ec75dee5b707 [2021-11-12 23:43:53,699 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:43:53,700 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:43:53,706 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:43:53,706 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:43:53,709 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:43:53,710 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:43:53" (1/1) ... [2021-11-12 23:43:53,711 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1006eae4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:43:53, skipping insertion in model container [2021-11-12 23:43:53,711 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:43:53" (1/1) ... [2021-11-12 23:43:53,718 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:43:53,909 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:43:57,007 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-irda-via-ircc.cil.i[324559,324572] [2021-11-12 23:43:57,010 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-irda-via-ircc.cil.i[324728,324741] [2021-11-12 23:43:57,011 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-irda-via-ircc.cil.i[324895,324908] [2021-11-12 23:43:57,011 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-irda-via-ircc.cil.i[325063,325076] [2021-11-12 23:43:57,027 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:43:57,085 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-12 23:43:57,086 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4c7d7537 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:43:57, skipping insertion in model container [2021-11-12 23:43:57,086 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:43:57,086 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:43:57,089 INFO L158 Benchmark]: Toolchain (without parser) took 3387.00ms. Allocated memory was 111.1MB in the beginning and 144.7MB in the end (delta: 33.6MB). Free memory was 65.7MB in the beginning and 98.1MB in the end (delta: -32.4MB). Peak memory consumption was 49.4MB. Max. memory is 16.1GB. [2021-11-12 23:43:57,089 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 111.1MB. Free memory is still 64.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:43:57,091 INFO L158 Benchmark]: CACSL2BoogieTranslator took 3380.40ms. Allocated memory was 111.1MB in the beginning and 144.7MB in the end (delta: 33.6MB). Free memory was 65.4MB in the beginning and 98.1MB in the end (delta: -32.7MB). Peak memory consumption was 49.4MB. Max. memory is 16.1GB. [2021-11-12 23:43:57,093 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 111.1MB. Free memory is still 64.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 3380.40ms. Allocated memory was 111.1MB in the beginning and 144.7MB in the end (delta: 33.6MB). Free memory was 65.4MB in the beginning and 98.1MB in the end (delta: -32.7MB). Peak memory consumption was 49.4MB. 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_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/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_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 6c1be66de5de44f99e184f931232a9d8bcb0b8fd4712efbcede070913355a2c0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:43:59,421 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:43:59,423 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:43:59,454 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:43:59,455 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:43:59,456 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:43:59,458 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:43:59,460 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:43:59,463 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:43:59,464 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:43:59,465 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:43:59,466 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:43:59,467 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:43:59,468 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:43:59,470 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:43:59,471 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:43:59,472 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:43:59,473 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:43:59,476 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:43:59,479 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:43:59,481 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:43:59,482 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:43:59,484 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:43:59,485 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:43:59,489 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:43:59,497 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:43:59,497 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:43:59,498 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:43:59,499 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:43:59,500 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:43:59,500 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:43:59,501 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:43:59,502 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:43:59,503 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:43:59,504 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:43:59,505 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:43:59,506 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:43:59,506 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:43:59,521 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:43:59,522 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:43:59,523 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:43:59,525 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-12 23:43:59,567 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:43:59,569 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:43:59,570 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:43:59,570 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:43:59,571 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:43:59,571 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:43:59,571 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:43:59,571 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:43:59,572 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:43:59,572 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:43:59,574 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:43:59,575 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:43:59,575 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:43:59,575 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:43:59,575 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:43:59,576 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:43:59,576 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:43:59,576 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:43:59,576 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:43:59,577 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:43:59,577 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:43:59,577 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:43:59,577 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:43:59,578 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:43:59,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:43:59,578 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:43:59,578 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:43:59,579 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:43:59,579 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:43:59,579 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:43:59,579 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:43:59,580 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:43:59,580 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:43:59,580 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_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c1be66de5de44f99e184f931232a9d8bcb0b8fd4712efbcede070913355a2c0 [2021-11-12 23:43:59,972 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:43:59,998 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:44:00,000 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:44:00,001 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:44:00,002 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:44:00,004 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-irda-via-ircc.cil.i [2021-11-12 23:44:00,065 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/data/832d07fc7/6440105b902946bd8688214b4ed8ebdf/FLAG8a2e5a338 [2021-11-12 23:44:01,022 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:44:01,022 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-irda-via-ircc.cil.i [2021-11-12 23:44:01,099 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/data/832d07fc7/6440105b902946bd8688214b4ed8ebdf/FLAG8a2e5a338 [2021-11-12 23:44:01,418 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/data/832d07fc7/6440105b902946bd8688214b4ed8ebdf [2021-11-12 23:44:01,421 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:44:01,424 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:44:01,425 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:44:01,426 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:44:01,429 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:44:01,430 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:44:01" (1/1) ... [2021-11-12 23:44:01,431 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@501ccf39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:44:01, skipping insertion in model container [2021-11-12 23:44:01,431 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:44:01" (1/1) ... [2021-11-12 23:44:01,438 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:44:01,660 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:44:04,617 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-irda-via-ircc.cil.i[324559,324572] [2021-11-12 23:44:04,622 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-irda-via-ircc.cil.i[324728,324741] [2021-11-12 23:44:04,622 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-irda-via-ircc.cil.i[324895,324908] [2021-11-12 23:44:04,623 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-irda-via-ircc.cil.i[325063,325076] [2021-11-12 23:44:04,644 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:44:04,732 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:44:04,793 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:44:05,232 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-irda-via-ircc.cil.i[324559,324572] [2021-11-12 23:44:05,233 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-irda-via-ircc.cil.i[324728,324741] [2021-11-12 23:44:05,233 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-irda-via-ircc.cil.i[324895,324908] [2021-11-12 23:44:05,237 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-irda-via-ircc.cil.i[325063,325076] [2021-11-12 23:44:05,244 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:44:05,276 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:44:05,742 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-irda-via-ircc.cil.i[324559,324572] [2021-11-12 23:44:05,743 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-irda-via-ircc.cil.i[324728,324741] [2021-11-12 23:44:05,743 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-irda-via-ircc.cil.i[324895,324908] [2021-11-12 23:44:05,744 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-kernel-locking-spinlock_drivers-net-irda-via-ircc.cil.i[325063,325076] [2021-11-12 23:44:05,751 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:44:05,936 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:44:05,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:44:05 WrapperNode [2021-11-12 23:44:05,937 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:44:05,939 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:44:05,939 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:44:05,939 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:44:05,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:44:05" (1/1) ... [2021-11-12 23:44:06,076 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:44:05" (1/1) ... [2021-11-12 23:44:06,293 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:44:06,295 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:44:06,296 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:44:06,296 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:44:06,305 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:44:05" (1/1) ... [2021-11-12 23:44:06,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:44:05" (1/1) ... [2021-11-12 23:44:06,330 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:44:05" (1/1) ... [2021-11-12 23:44:06,331 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:44:05" (1/1) ... [2021-11-12 23:44:06,481 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:44:05" (1/1) ... [2021-11-12 23:44:06,508 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:44:05" (1/1) ... [2021-11-12 23:44:06,538 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:44:05" (1/1) ... [2021-11-12 23:44:06,570 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:44:06,572 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:44:06,572 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:44:06,572 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:44:06,573 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:44:05" (1/1) ... [2021-11-12 23:44:06,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:44:06,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:44:06,609 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:44:06,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:44:06,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-12 23:44:06,652 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-12 23:44:06,652 INFO L130 BoogieDeclarations]: Found specification of procedure RxCurCount [2021-11-12 23:44:06,652 INFO L138 BoogieDeclarations]: Found implementation of procedure RxCurCount [2021-11-12 23:44:06,652 INFO L130 BoogieDeclarations]: Found specification of procedure irda_setup_dma [2021-11-12 23:44:06,653 INFO L138 BoogieDeclarations]: Found implementation of procedure irda_setup_dma [2021-11-12 23:44:06,653 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-12 23:44:06,653 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-12 23:44:06,653 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-12 23:44:06,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-12 23:44:06,653 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_73 [2021-11-12 23:44:06,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_73 [2021-11-12 23:44:06,654 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2021-11-12 23:44:06,654 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2021-11-12 23:44:06,654 INFO L130 BoogieDeclarations]: Found specification of procedure CheckRegBit [2021-11-12 23:44:06,654 INFO L138 BoogieDeclarations]: Found implementation of procedure CheckRegBit [2021-11-12 23:44:06,654 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-12 23:44:06,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lock [2021-11-12 23:44:06,655 INFO L130 BoogieDeclarations]: Found specification of procedure via_remove_one [2021-11-12 23:44:06,655 INFO L138 BoogieDeclarations]: Found implementation of procedure via_remove_one [2021-11-12 23:44:06,655 INFO L130 BoogieDeclarations]: Found specification of procedure via_ircc_change_speed [2021-11-12 23:44:06,655 INFO L138 BoogieDeclarations]: Found implementation of procedure via_ircc_change_speed [2021-11-12 23:44:06,655 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~structbegin~C_INT~structend~~TO~C_INT [2021-11-12 23:44:06,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~structbegin~C_INT~structend~~TO~C_INT [2021-11-12 23:44:06,656 INFO L130 BoogieDeclarations]: Found specification of procedure dma_zalloc_coherent [2021-11-12 23:44:06,656 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_zalloc_coherent [2021-11-12 23:44:06,657 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-12 23:44:06,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-12 23:44:06,657 INFO L130 BoogieDeclarations]: Found specification of procedure SetPulseWidth [2021-11-12 23:44:06,657 INFO L138 BoogieDeclarations]: Found implementation of procedure SetPulseWidth [2021-11-12 23:44:06,657 INFO L130 BoogieDeclarations]: Found specification of procedure Tdelay [2021-11-12 23:44:06,658 INFO L138 BoogieDeclarations]: Found implementation of procedure Tdelay [2021-11-12 23:44:06,658 INFO L130 BoogieDeclarations]: Found specification of procedure netif_rx [2021-11-12 23:44:06,658 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_rx [2021-11-12 23:44:06,658 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-12 23:44:06,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-12 23:44:06,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 23:44:06,659 INFO L130 BoogieDeclarations]: Found specification of procedure ClkTx [2021-11-12 23:44:06,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ClkTx [2021-11-12 23:44:06,659 INFO L130 BoogieDeclarations]: Found specification of procedure WriteLPCReg [2021-11-12 23:44:06,659 INFO L138 BoogieDeclarations]: Found implementation of procedure WriteLPCReg [2021-11-12 23:44:06,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:44:06,660 INFO L130 BoogieDeclarations]: Found specification of procedure capable [2021-11-12 23:44:06,661 INFO L138 BoogieDeclarations]: Found implementation of procedure capable [2021-11-12 23:44:06,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-12 23:44:06,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-12 23:44:06,662 INFO L130 BoogieDeclarations]: Found specification of procedure CommonInit [2021-11-12 23:44:06,662 INFO L138 BoogieDeclarations]: Found implementation of procedure CommonInit [2021-11-12 23:44:06,662 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-12 23:44:06,662 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-12 23:44:06,663 INFO L130 BoogieDeclarations]: Found specification of procedure via_ircc_change_dongle_speed [2021-11-12 23:44:06,663 INFO L138 BoogieDeclarations]: Found implementation of procedure via_ircc_change_dongle_speed [2021-11-12 23:44:06,663 INFO L130 BoogieDeclarations]: Found specification of procedure ReadLPCReg [2021-11-12 23:44:06,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadLPCReg [2021-11-12 23:44:06,664 INFO L130 BoogieDeclarations]: Found specification of procedure free_dma [2021-11-12 23:44:06,664 INFO L138 BoogieDeclarations]: Found implementation of procedure free_dma [2021-11-12 23:44:06,664 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_lock_of_via_ircc_cb [2021-11-12 23:44:06,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_lock_of_via_ircc_cb [2021-11-12 23:44:06,664 INFO L130 BoogieDeclarations]: Found specification of procedure via_ircc_dma_receive [2021-11-12 23:44:06,665 INFO L138 BoogieDeclarations]: Found implementation of procedure via_ircc_dma_receive [2021-11-12 23:44:06,666 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-12 23:44:06,666 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-12 23:44:06,666 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-12 23:44:06,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-12 23:44:06,666 INFO L130 BoogieDeclarations]: Found specification of procedure via_ircc_net_close [2021-11-12 23:44:06,666 INFO L138 BoogieDeclarations]: Found implementation of procedure via_ircc_net_close [2021-11-12 23:44:06,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-12 23:44:06,667 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-12 23:44:06,667 INFO L130 BoogieDeclarations]: Found specification of procedure CkRxRecv [2021-11-12 23:44:06,667 INFO L138 BoogieDeclarations]: Found implementation of procedure CkRxRecv [2021-11-12 23:44:06,667 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2021-11-12 23:44:06,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2021-11-12 23:44:06,667 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_err_code [2021-11-12 23:44:06,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_err_code [2021-11-12 23:44:06,668 INFO L130 BoogieDeclarations]: Found specification of procedure irda_get_next_speed [2021-11-12 23:44:06,669 INFO L138 BoogieDeclarations]: Found implementation of procedure irda_get_next_speed [2021-11-12 23:44:06,669 INFO L130 BoogieDeclarations]: Found specification of procedure ReadReg [2021-11-12 23:44:06,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadReg [2021-11-12 23:44:06,669 INFO L130 BoogieDeclarations]: Found specification of procedure via_ircc_open [2021-11-12 23:44:06,669 INFO L138 BoogieDeclarations]: Found implementation of procedure via_ircc_open [2021-11-12 23:44:06,669 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-12 23:44:06,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exit [2021-11-12 23:44:06,670 INFO L130 BoogieDeclarations]: Found specification of procedure WriteRegBit [2021-11-12 23:44:06,671 INFO L138 BoogieDeclarations]: Found implementation of procedure WriteRegBit [2021-11-12 23:44:06,671 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 23:44:06,671 INFO L130 BoogieDeclarations]: Found specification of procedure Wr_Indx [2021-11-12 23:44:06,671 INFO L138 BoogieDeclarations]: Found implementation of procedure Wr_Indx [2021-11-12 23:44:06,671 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-12 23:44:06,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-12 23:44:06,671 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-12 23:44:06,672 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-12 23:44:06,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 23:44:06,672 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-12 23:44:06,672 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-12 23:44:06,672 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-12 23:44:06,672 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-12 23:44:06,672 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-12 23:44:06,673 INFO L130 BoogieDeclarations]: Found specification of procedure WriteReg [2021-11-12 23:44:06,673 INFO L138 BoogieDeclarations]: Found implementation of procedure WriteReg [2021-11-12 23:44:06,673 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_spin_lock [2021-11-12 23:44:06,673 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_spin_lock [2021-11-12 23:44:06,674 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-12 23:44:06,674 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-12 23:44:06,674 INFO L130 BoogieDeclarations]: Found specification of procedure SetBaudRate [2021-11-12 23:44:06,676 INFO L138 BoogieDeclarations]: Found implementation of procedure SetBaudRate [2021-11-12 23:44:06,679 INFO L130 BoogieDeclarations]: Found specification of procedure Wr_Byte [2021-11-12 23:44:06,679 INFO L138 BoogieDeclarations]: Found implementation of procedure Wr_Byte [2021-11-12 23:44:06,679 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2021-11-12 23:44:06,680 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2021-11-12 23:44:06,681 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2021-11-12 23:44:06,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2021-11-12 23:44:06,681 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-12 23:44:06,682 INFO L130 BoogieDeclarations]: Found specification of procedure via_ircc_net_open [2021-11-12 23:44:06,682 INFO L138 BoogieDeclarations]: Found implementation of procedure via_ircc_net_open [2021-11-12 23:44:06,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:44:06,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:44:06,685 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-12 23:44:06,685 INFO L130 BoogieDeclarations]: Found specification of procedure ResetChip [2021-11-12 23:44:06,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ResetChip [2021-11-12 23:44:06,686 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-12 23:44:06,686 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 23:44:06,686 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-12 23:44:06,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-12 23:44:06,686 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-12 23:44:06,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-12 23:44:06,686 INFO L130 BoogieDeclarations]: Found specification of procedure irda_device_txqueue_empty [2021-11-12 23:44:06,686 INFO L138 BoogieDeclarations]: Found implementation of procedure irda_device_txqueue_empty [2021-11-12 23:44:06,686 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-12 23:44:06,687 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlock [2021-11-12 23:44:06,687 INFO L130 BoogieDeclarations]: Found specification of procedure pci_read_config_byte [2021-11-12 23:44:06,687 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_read_config_byte [2021-11-12 23:44:06,687 INFO L130 BoogieDeclarations]: Found specification of procedure Sdelay [2021-11-12 23:44:06,687 INFO L138 BoogieDeclarations]: Found implementation of procedure Sdelay [2021-11-12 23:44:06,687 INFO L130 BoogieDeclarations]: Found specification of procedure SetSIR [2021-11-12 23:44:06,687 INFO L138 BoogieDeclarations]: Found implementation of procedure SetSIR [2021-11-12 23:44:06,687 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-12 23:44:06,687 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-12 23:44:06,687 INFO L130 BoogieDeclarations]: Found specification of procedure SetMaxRxPacketSize [2021-11-12 23:44:06,688 INFO L138 BoogieDeclarations]: Found implementation of procedure SetMaxRxPacketSize [2021-11-12 23:44:06,688 INFO L130 BoogieDeclarations]: Found specification of procedure GetRecvByte [2021-11-12 23:44:06,688 INFO L138 BoogieDeclarations]: Found implementation of procedure GetRecvByte [2021-11-12 23:44:06,688 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2021-11-12 23:44:06,688 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2021-11-12 23:44:06,688 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:44:06,688 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 23:44:06,688 INFO L130 BoogieDeclarations]: Found specification of procedure hwreset [2021-11-12 23:44:06,688 INFO L138 BoogieDeclarations]: Found implementation of procedure hwreset [2021-11-12 23:44:06,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-12 23:44:06,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-12 23:44:06,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-12 23:44:06,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-12 23:44:06,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-12 23:44:06,689 INFO L130 BoogieDeclarations]: Found specification of procedure pci_write_config_byte [2021-11-12 23:44:06,689 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_write_config_byte [2021-11-12 23:44:06,689 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-12 23:44:06,689 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-12 23:44:06,690 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2021-11-12 23:44:06,690 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2021-11-12 23:44:06,690 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-12 23:44:06,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-12 23:44:06,690 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_irq [2021-11-12 23:44:06,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_irq [2021-11-12 23:44:06,690 INFO L130 BoogieDeclarations]: Found specification of procedure via_ircc_dma_xmit [2021-11-12 23:44:06,690 INFO L138 BoogieDeclarations]: Found implementation of procedure via_ircc_dma_xmit [2021-11-12 23:44:06,690 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reserve [2021-11-12 23:44:06,691 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reserve [2021-11-12 23:44:06,691 INFO L130 BoogieDeclarations]: Found specification of procedure dma_free_attrs [2021-11-12 23:44:06,691 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_free_attrs [2021-11-12 23:44:06,691 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-11-12 23:44:06,691 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-11-12 23:44:06,691 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-12 23:44:06,691 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-12 23:44:06,691 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~C_INT [2021-11-12 23:44:06,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~C_INT [2021-11-12 23:44:06,692 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2021-11-12 23:44:06,692 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2021-11-12 23:44:06,699 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-12 23:44:06,699 INFO L130 BoogieDeclarations]: Found specification of procedure net_ratelimit [2021-11-12 23:44:06,699 INFO L138 BoogieDeclarations]: Found implementation of procedure net_ratelimit [2021-11-12 23:44:06,699 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-12 23:44:06,699 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-12 23:44:06,699 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-12 23:44:06,700 INFO L130 BoogieDeclarations]: Found specification of procedure SetSendByte [2021-11-12 23:44:06,700 INFO L138 BoogieDeclarations]: Found implementation of procedure SetSendByte [2021-11-12 23:44:06,700 INFO L130 BoogieDeclarations]: Found specification of procedure dev_alloc_skb [2021-11-12 23:44:06,700 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_alloc_skb [2021-11-12 23:44:06,700 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-12 23:44:06,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-12 23:44:06,700 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_lock_of_via_ircc_cb [2021-11-12 23:44:06,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_lock_of_via_ircc_cb [2021-11-12 23:44:06,700 INFO L130 BoogieDeclarations]: Found specification of procedure SetSendPreambleCount [2021-11-12 23:44:06,701 INFO L138 BoogieDeclarations]: Found implementation of procedure SetSendPreambleCount [2021-11-12 23:44:06,701 INFO L130 BoogieDeclarations]: Found specification of procedure InitCard [2021-11-12 23:44:06,701 INFO L138 BoogieDeclarations]: Found implementation of procedure InitCard [2021-11-12 23:44:06,701 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-12 23:44:06,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-12 23:44:06,701 INFO L130 BoogieDeclarations]: Found specification of procedure SetTimer [2021-11-12 23:44:06,701 INFO L138 BoogieDeclarations]: Found implementation of procedure SetTimer [2021-11-12 23:44:06,701 INFO L130 BoogieDeclarations]: Found specification of procedure ActClk [2021-11-12 23:44:06,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ActClk [2021-11-12 23:44:06,702 INFO L130 BoogieDeclarations]: Found specification of procedure request_dma [2021-11-12 23:44:06,702 INFO L138 BoogieDeclarations]: Found implementation of procedure request_dma [2021-11-12 23:44:06,702 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2021-11-12 23:44:06,702 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2021-11-12 23:44:06,702 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reset_mac_header [2021-11-12 23:44:06,702 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reset_mac_header [2021-11-12 23:44:06,702 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-12 23:44:06,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-12 23:44:06,703 INFO L130 BoogieDeclarations]: Found specification of procedure skb_copy_to_linear_data [2021-11-12 23:44:06,703 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_copy_to_linear_data [2021-11-12 23:44:08,036 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-12 23:44:48,960 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:44:48,960 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-12 23:44:48,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:44:48 BoogieIcfgContainer [2021-11-12 23:44:48,965 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:44:48,967 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:44:48,967 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:44:48,970 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:44:48,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:44:01" (1/3) ... [2021-11-12 23:44:48,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53a6b16c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:44:48, skipping insertion in model container [2021-11-12 23:44:48,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:44:05" (2/3) ... [2021-11-12 23:44:48,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53a6b16c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:44:48, skipping insertion in model container [2021-11-12 23:44:48,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:44:48" (3/3) ... [2021-11-12 23:44:48,973 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_linux-kernel-locking-spinlock_drivers-net-irda-via-ircc.cil.i [2021-11-12 23:44:48,979 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:44:48,979 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-12 23:44:49,039 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:44:49,045 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 23:44:49,045 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-12 23:44:49,106 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) [2021-11-12 23:44:49,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-12 23:44:49,113 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:44:49,114 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] [2021-11-12 23:44:49,115 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-12 23:44:49,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:44:49,120 INFO L85 PathProgramCache]: Analyzing trace with hash 138977870, now seen corresponding path program 1 times [2021-11-12 23:44:49,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:44:49,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [459656369] [2021-11-12 23:44:49,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:44:49,139 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:44:49,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:44:49,143 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:44:49,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:44:51,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:44:52,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 1422 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:44:52,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:44:52,661 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 23:44:52,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:44:53,037 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 23:44:53,038 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:44:53,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [459656369] [2021-11-12 23:44:53,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [459656369] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:44:53,039 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:44:53,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 7 [2021-11-12 23:44:53,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292374182] [2021-11-12 23:44:53,042 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:44:53,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:44:53,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:44:53,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:44:53,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:44:53,097 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) [2021-11-12 23:44:53,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:44:53,778 INFO L93 Difference]: Finished difference Result 3611 states and 5273 transitions. [2021-11-12 23:44:53,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:44:53,783 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 [2021-11-12 23:44:53,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:44:53,827 INFO L225 Difference]: With dead ends: 3611 [2021-11-12 23:44:53,828 INFO L226 Difference]: Without dead ends: 1811 [2021-11-12 23:44:53,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:44:53,858 INFO L933 BasicCegarLoop]: 2624 mSDtfsCounter, 2583 mSDsluCounter, 10467 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 130.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2597 SdHoareTripleChecker+Valid, 13091 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 84.47ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 160.85ms IncrementalHoareTripleChecker+Time [2021-11-12 23:44:53,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2597 Valid, 13091 Invalid, 41 Unknown, 0 Unchecked, 84.47ms Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 160.85ms Time] [2021-11-12 23:44:53,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1811 states. [2021-11-12 23:44:54,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1811 to 1811. [2021-11-12 23:44:54,094 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) [2021-11-12 23:44:54,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1811 states to 1811 states and 2619 transitions. [2021-11-12 23:44:54,124 INFO L78 Accepts]: Start accepts. Automaton has 1811 states and 2619 transitions. Word has length 51 [2021-11-12 23:44:54,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:44:54,125 INFO L470 AbstractCegarLoop]: Abstraction has 1811 states and 2619 transitions. [2021-11-12 23:44:54,126 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) [2021-11-12 23:44:54,126 INFO L276 IsEmpty]: Start isEmpty. Operand 1811 states and 2619 transitions. [2021-11-12 23:44:54,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-12 23:44:54,129 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:44:54,130 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] [2021-11-12 23:44:54,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:44:54,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:44:54,353 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)] === [2021-11-12 23:44:54,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:44:54,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1457883714, now seen corresponding path program 1 times [2021-11-12 23:44:54,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:44:54,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1147487248] [2021-11-12 23:44:54,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:44:54,359 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:44:54,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:44:54,360 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:44:54,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:44:57,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:44:57,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 1429 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:44:57,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:44:57,628 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 23:44:57,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:44:57,922 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 23:44:57,922 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:44:57,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1147487248] [2021-11-12 23:44:57,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1147487248] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:44:57,923 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:44:57,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-12 23:44:57,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335951868] [2021-11-12 23:44:57,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:44:57,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:44:57,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:44:57,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:44:57,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:44:57,926 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) [2021-11-12 23:44:58,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:44:58,310 INFO L93 Difference]: Finished difference Result 1817 states and 2624 transitions. [2021-11-12 23:44:58,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:44:58,310 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 [2021-11-12 23:44:58,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:44:58,330 INFO L225 Difference]: With dead ends: 1817 [2021-11-12 23:44:58,330 INFO L226 Difference]: Without dead ends: 1815 [2021-11-12 23:44:58,333 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 [2021-11-12 23:44:58,334 INFO L933 BasicCegarLoop]: 2616 mSDtfsCounter, 2583 mSDsluCounter, 5211 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 80.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2595 SdHoareTripleChecker+Valid, 7827 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 26.53ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 101.33ms IncrementalHoareTripleChecker+Time [2021-11-12 23:44:58,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2595 Valid, 7827 Invalid, 22 Unknown, 0 Unchecked, 26.53ms Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 101.33ms Time] [2021-11-12 23:44:58,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1815 states. [2021-11-12 23:44:58,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1815 to 1815. [2021-11-12 23:44:58,474 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) [2021-11-12 23:44:58,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1815 states to 1815 states and 2622 transitions. [2021-11-12 23:44:58,500 INFO L78 Accepts]: Start accepts. Automaton has 1815 states and 2622 transitions. Word has length 56 [2021-11-12 23:44:58,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:44:58,501 INFO L470 AbstractCegarLoop]: Abstraction has 1815 states and 2622 transitions. [2021-11-12 23:44:58,501 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) [2021-11-12 23:44:58,501 INFO L276 IsEmpty]: Start isEmpty. Operand 1815 states and 2622 transitions. [2021-11-12 23:44:58,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-12 23:44:58,511 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:44:58,511 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] [2021-11-12 23:44:58,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:44:58,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:44:58,725 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)] === [2021-11-12 23:44:58,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:44:58,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1330618354, now seen corresponding path program 1 times [2021-11-12 23:44:58,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:44:58,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1257119208] [2021-11-12 23:44:58,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:44:58,731 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:44:58,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:44:58,733 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:44:58,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:45:01,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:01,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 1436 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:45:01,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:01,961 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 23:45:01,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:02,366 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 23:45:02,366 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:02,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1257119208] [2021-11-12 23:45:02,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1257119208] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:45:02,366 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:45:02,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-12 23:45:02,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384551677] [2021-11-12 23:45:02,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:02,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:45:02,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:02,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:45:02,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:45:02,368 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) [2021-11-12 23:45:02,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:02,718 INFO L93 Difference]: Finished difference Result 1821 states and 2627 transitions. [2021-11-12 23:45:02,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:45:02,719 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 [2021-11-12 23:45:02,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:02,745 INFO L225 Difference]: With dead ends: 1821 [2021-11-12 23:45:02,745 INFO L226 Difference]: Without dead ends: 1819 [2021-11-12 23:45:02,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:45:02,752 INFO L933 BasicCegarLoop]: 2616 mSDtfsCounter, 2583 mSDsluCounter, 5211 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 70.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2594 SdHoareTripleChecker+Valid, 7827 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 26.44ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 81.34ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:02,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2594 Valid, 7827 Invalid, 22 Unknown, 0 Unchecked, 26.44ms Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 81.34ms Time] [2021-11-12 23:45:02,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1819 states. [2021-11-12 23:45:02,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1819 to 1819. [2021-11-12 23:45:02,922 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) [2021-11-12 23:45:02,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 2625 transitions. [2021-11-12 23:45:02,948 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 2625 transitions. Word has length 61 [2021-11-12 23:45:02,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:02,948 INFO L470 AbstractCegarLoop]: Abstraction has 1819 states and 2625 transitions. [2021-11-12 23:45:02,949 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) [2021-11-12 23:45:02,949 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 2625 transitions. [2021-11-12 23:45:02,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-12 23:45:02,952 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:02,953 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] [2021-11-12 23:45:02,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:03,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:03,169 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)] === [2021-11-12 23:45:03,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:03,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1915648428, now seen corresponding path program 1 times [2021-11-12 23:45:03,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:03,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [340163926] [2021-11-12 23:45:03,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:03,175 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:03,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:03,178 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:03,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:45:05,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:05,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 1475 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 23:45:05,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:06,475 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 23:45:06,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:07,626 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 23:45:07,627 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:07,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [340163926] [2021-11-12 23:45:07,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [340163926] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:45:07,627 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:45:07,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12, 12] imperfect sequences [] total 21 [2021-11-12 23:45:07,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413048697] [2021-11-12 23:45:07,628 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:07,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-12 23:45:07,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:07,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-12 23:45:07,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-11-12 23:45:07,630 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) [2021-11-12 23:45:10,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:10,163 INFO L93 Difference]: Finished difference Result 1874 states and 2695 transitions. [2021-11-12 23:45:10,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-12 23:45:10,164 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 [2021-11-12 23:45:10,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:10,184 INFO L225 Difference]: With dead ends: 1874 [2021-11-12 23:45:10,185 INFO L226 Difference]: Without dead ends: 1831 [2021-11-12 23:45:10,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-11-12 23:45:10,190 INFO L933 BasicCegarLoop]: 2585 mSDtfsCounter, 35 mSDsluCounter, 33516 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1675.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 36101 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 68.31ms SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1767.79ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:10,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 36101 Invalid, 590 Unknown, 0 Unchecked, 68.31ms Time], IncrementalHoareTripleChecker [39 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 1767.79ms Time] [2021-11-12 23:45:10,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1831 states. [2021-11-12 23:45:10,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1831 to 1827. [2021-11-12 23:45:10,365 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) [2021-11-12 23:45:10,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1827 states to 1827 states and 2635 transitions. [2021-11-12 23:45:10,380 INFO L78 Accepts]: Start accepts. Automaton has 1827 states and 2635 transitions. Word has length 75 [2021-11-12 23:45:10,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:10,381 INFO L470 AbstractCegarLoop]: Abstraction has 1827 states and 2635 transitions. [2021-11-12 23:45:10,381 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) [2021-11-12 23:45:10,381 INFO L276 IsEmpty]: Start isEmpty. Operand 1827 states and 2635 transitions. [2021-11-12 23:45:10,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-12 23:45:10,384 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:10,384 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] [2021-11-12 23:45:10,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:10,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:10,605 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)] === [2021-11-12 23:45:10,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:10,606 INFO L85 PathProgramCache]: Analyzing trace with hash -186810498, now seen corresponding path program 1 times [2021-11-12 23:45:10,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:10,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [849341737] [2021-11-12 23:45:10,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:10,610 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:10,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:10,616 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:10,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:45:13,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:13,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 1443 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:45:13,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:13,782 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 23:45:13,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:14,131 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 23:45:14,131 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:14,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [849341737] [2021-11-12 23:45:14,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [849341737] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:45:14,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:45:14,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-12 23:45:14,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819719701] [2021-11-12 23:45:14,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:14,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:45:14,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:14,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:45:14,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:45:14,133 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) [2021-11-12 23:45:14,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:14,433 INFO L93 Difference]: Finished difference Result 1833 states and 2640 transitions. [2021-11-12 23:45:14,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:45:14,433 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 [2021-11-12 23:45:14,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:14,451 INFO L225 Difference]: With dead ends: 1833 [2021-11-12 23:45:14,451 INFO L226 Difference]: Without dead ends: 1831 [2021-11-12 23:45:14,453 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 [2021-11-12 23:45:14,454 INFO L933 BasicCegarLoop]: 2616 mSDtfsCounter, 2583 mSDsluCounter, 5211 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 79.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2593 SdHoareTripleChecker+Valid, 7827 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.33ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 84.93ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:14,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2593 Valid, 7827 Invalid, 22 Unknown, 0 Unchecked, 16.33ms Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 84.93ms Time] [2021-11-12 23:45:14,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1831 states. [2021-11-12 23:45:14,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1831 to 1831. [2021-11-12 23:45:14,602 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) [2021-11-12 23:45:14,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1831 states to 1831 states and 2638 transitions. [2021-11-12 23:45:14,619 INFO L78 Accepts]: Start accepts. Automaton has 1831 states and 2638 transitions. Word has length 66 [2021-11-12 23:45:14,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:14,619 INFO L470 AbstractCegarLoop]: Abstraction has 1831 states and 2638 transitions. [2021-11-12 23:45:14,620 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) [2021-11-12 23:45:14,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1831 states and 2638 transitions. [2021-11-12 23:45:14,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-12 23:45:14,621 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:14,621 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] [2021-11-12 23:45:14,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:14,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:14,845 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-12 23:45:14,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:14,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1901975888, now seen corresponding path program 1 times [2021-11-12 23:45:14,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:14,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [454318767] [2021-11-12 23:45:14,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:14,851 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:14,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:14,852 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:14,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:45:17,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:17,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 1450 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 23:45:17,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:18,023 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-12 23:45:18,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:18,722 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-12 23:45:18,722 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:18,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [454318767] [2021-11-12 23:45:18,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [454318767] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:45:18,722 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:45:18,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12, 12] imperfect sequences [] total 15 [2021-11-12 23:45:18,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934415301] [2021-11-12 23:45:18,723 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:18,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-12 23:45:18,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:18,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-12 23:45:18,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:45:18,724 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) [2021-11-12 23:45:20,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:20,603 INFO L93 Difference]: Finished difference Result 1871 states and 2687 transitions. [2021-11-12 23:45:20,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 23:45:20,603 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 [2021-11-12 23:45:20,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:20,622 INFO L225 Difference]: With dead ends: 1871 [2021-11-12 23:45:20,622 INFO L226 Difference]: Without dead ends: 1833 [2021-11-12 23:45:20,625 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 [2021-11-12 23:45:20,625 INFO L933 BasicCegarLoop]: 2591 mSDtfsCounter, 73 mSDsluCounter, 28376 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1282.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 30967 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 38.27ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1358.18ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:20,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 30967 Invalid, 466 Unknown, 0 Unchecked, 38.27ms Time], IncrementalHoareTripleChecker [24 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 1358.18ms Time] [2021-11-12 23:45:20,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1833 states. [2021-11-12 23:45:20,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1833 to 1831. [2021-11-12 23:45:20,758 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) [2021-11-12 23:45:20,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1831 states to 1831 states and 2637 transitions. [2021-11-12 23:45:20,774 INFO L78 Accepts]: Start accepts. Automaton has 1831 states and 2637 transitions. Word has length 71 [2021-11-12 23:45:20,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:20,775 INFO L470 AbstractCegarLoop]: Abstraction has 1831 states and 2637 transitions. [2021-11-12 23:45:20,775 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) [2021-11-12 23:45:20,775 INFO L276 IsEmpty]: Start isEmpty. Operand 1831 states and 2637 transitions. [2021-11-12 23:45:20,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-12 23:45:20,776 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:20,776 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] [2021-11-12 23:45:20,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:20,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:20,985 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-12 23:45:20,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:20,986 INFO L85 PathProgramCache]: Analyzing trace with hash 889808670, now seen corresponding path program 1 times [2021-11-12 23:45:20,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:20,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1464543673] [2021-11-12 23:45:20,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:20,988 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:20,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:20,989 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:20,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:45:23,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:23,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 1482 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:45:23,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:23,953 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-12 23:45:23,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:24,209 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 23:45:24,209 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:24,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1464543673] [2021-11-12 23:45:24,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1464543673] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:45:24,209 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:45:24,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 23:45:24,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553353947] [2021-11-12 23:45:24,210 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:24,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:45:24,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:24,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:45:24,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:45:24,211 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) [2021-11-12 23:45:24,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:24,824 INFO L93 Difference]: Finished difference Result 5449 states and 7909 transitions. [2021-11-12 23:45:24,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:45:24,824 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 [2021-11-12 23:45:24,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:24,860 INFO L225 Difference]: With dead ends: 5449 [2021-11-12 23:45:24,860 INFO L226 Difference]: Without dead ends: 3639 [2021-11-12 23:45:24,883 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 [2021-11-12 23:45:24,884 INFO L933 BasicCegarLoop]: 3519 mSDtfsCounter, 2574 mSDsluCounter, 2516 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 312.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2574 SdHoareTripleChecker+Valid, 6035 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.19ms SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 342.16ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:24,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2574 Valid, 6035 Invalid, 128 Unknown, 0 Unchecked, 19.19ms Time], IncrementalHoareTripleChecker [41 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 342.16ms Time] [2021-11-12 23:45:24,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3639 states. [2021-11-12 23:45:25,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3639 to 3590. [2021-11-12 23:45:25,210 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) [2021-11-12 23:45:25,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3590 states to 3590 states and 5178 transitions. [2021-11-12 23:45:25,247 INFO L78 Accepts]: Start accepts. Automaton has 3590 states and 5178 transitions. Word has length 80 [2021-11-12 23:45:25,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:25,248 INFO L470 AbstractCegarLoop]: Abstraction has 3590 states and 5178 transitions. [2021-11-12 23:45:25,249 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) [2021-11-12 23:45:25,249 INFO L276 IsEmpty]: Start isEmpty. Operand 3590 states and 5178 transitions. [2021-11-12 23:45:25,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-12 23:45:25,257 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:25,257 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] [2021-11-12 23:45:25,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:25,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:25,481 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_assert_linux_kernel_locking_spinlock__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-12 23:45:25,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:25,482 INFO L85 PathProgramCache]: Analyzing trace with hash -364405298, now seen corresponding path program 1 times [2021-11-12 23:45:25,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:25,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [649060301] [2021-11-12 23:45:25,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:25,484 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:25,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:25,485 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:25,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:45:27,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:28,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 1450 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:45:28,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:28,501 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 23:45:28,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:28,832 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 23:45:28,832 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:28,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [649060301] [2021-11-12 23:45:28,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [649060301] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:45:28,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:45:28,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-12 23:45:28,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020666921] [2021-11-12 23:45:28,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:28,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:45:28,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:28,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:45:28,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:45:28,833 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) [2021-11-12 23:45:29,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:29,231 INFO L93 Difference]: Finished difference Result 3596 states and 5183 transitions. [2021-11-12 23:45:29,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:45:29,232 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 [2021-11-12 23:45:29,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:29,267 INFO L225 Difference]: With dead ends: 3596 [2021-11-12 23:45:29,268 INFO L226 Difference]: Without dead ends: 3594 [2021-11-12 23:45:29,271 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 [2021-11-12 23:45:29,272 INFO L933 BasicCegarLoop]: 2616 mSDtfsCounter, 2583 mSDsluCounter, 5211 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 78.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2592 SdHoareTripleChecker+Valid, 7827 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.53ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 83.24ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:29,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2592 Valid, 7827 Invalid, 22 Unknown, 0 Unchecked, 14.53ms Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 83.24ms Time] [2021-11-12 23:45:29,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3594 states. [2021-11-12 23:45:29,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3594 to 3594. [2021-11-12 23:45:29,569 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) [2021-11-12 23:45:29,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3594 states to 3594 states and 5181 transitions. [2021-11-12 23:45:29,593 INFO L78 Accepts]: Start accepts. Automaton has 3594 states and 5181 transitions. Word has length 71 [2021-11-12 23:45:29,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:29,594 INFO L470 AbstractCegarLoop]: Abstraction has 3594 states and 5181 transitions. [2021-11-12 23:45:29,594 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) [2021-11-12 23:45:29,594 INFO L276 IsEmpty]: Start isEmpty. Operand 3594 states and 5181 transitions. [2021-11-12 23:45:29,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-12 23:45:29,597 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:29,597 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] [2021-11-12 23:45:29,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:29,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:29,821 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)] === [2021-11-12 23:45:29,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:29,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1963763536, now seen corresponding path program 1 times [2021-11-12 23:45:29,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:29,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [762897383] [2021-11-12 23:45:29,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:29,825 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:29,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:29,826 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:29,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:45:32,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:32,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 1489 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:45:32,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:32,983 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-12 23:45:32,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:33,356 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-12 23:45:33,356 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:33,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [762897383] [2021-11-12 23:45:33,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [762897383] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:45:33,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:45:33,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-12 23:45:33,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91326276] [2021-11-12 23:45:33,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:33,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:45:33,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:33,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:45:33,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:45:33,358 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) [2021-11-12 23:45:33,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:33,744 INFO L93 Difference]: Finished difference Result 3600 states and 5186 transitions. [2021-11-12 23:45:33,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:45:33,745 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 [2021-11-12 23:45:33,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:33,779 INFO L225 Difference]: With dead ends: 3600 [2021-11-12 23:45:33,779 INFO L226 Difference]: Without dead ends: 3598 [2021-11-12 23:45:33,783 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 [2021-11-12 23:45:33,783 INFO L933 BasicCegarLoop]: 2616 mSDtfsCounter, 2574 mSDsluCounter, 5211 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 80.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2582 SdHoareTripleChecker+Valid, 7827 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.48ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 84.72ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:33,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2582 Valid, 7827 Invalid, 22 Unknown, 0 Unchecked, 13.48ms Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 84.72ms Time] [2021-11-12 23:45:33,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3598 states. [2021-11-12 23:45:34,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3598 to 3598. [2021-11-12 23:45:34,196 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) [2021-11-12 23:45:34,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3598 states to 3598 states and 5184 transitions. [2021-11-12 23:45:34,219 INFO L78 Accepts]: Start accepts. Automaton has 3598 states and 5184 transitions. Word has length 85 [2021-11-12 23:45:34,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:34,220 INFO L470 AbstractCegarLoop]: Abstraction has 3598 states and 5184 transitions. [2021-11-12 23:45:34,220 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) [2021-11-12 23:45:34,220 INFO L276 IsEmpty]: Start isEmpty. Operand 3598 states and 5184 transitions. [2021-11-12 23:45:34,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-12 23:45:34,222 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:34,222 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] [2021-11-12 23:45:34,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:34,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:34,445 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)] === [2021-11-12 23:45:34,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:34,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1615963250, now seen corresponding path program 1 times [2021-11-12 23:45:34,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:34,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1625771928] [2021-11-12 23:45:34,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:34,448 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:34,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:34,448 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:34,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 23:45:36,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:36,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 1464 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:45:36,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:37,471 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-12 23:45:37,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:37,794 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-12 23:45:37,795 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:37,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1625771928] [2021-11-12 23:45:37,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1625771928] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:45:37,795 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:45:37,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-12 23:45:37,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784879176] [2021-11-12 23:45:37,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:37,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:45:37,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:37,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:45:37,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:45:37,796 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) [2021-11-12 23:45:38,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:38,173 INFO L93 Difference]: Finished difference Result 3604 states and 5189 transitions. [2021-11-12 23:45:38,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:45:38,174 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 [2021-11-12 23:45:38,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:38,220 INFO L225 Difference]: With dead ends: 3604 [2021-11-12 23:45:38,221 INFO L226 Difference]: Without dead ends: 3602 [2021-11-12 23:45:38,226 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 [2021-11-12 23:45:38,226 INFO L933 BasicCegarLoop]: 2616 mSDtfsCounter, 2583 mSDsluCounter, 5211 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 55.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2590 SdHoareTripleChecker+Valid, 7827 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.65ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 60.09ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:38,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2590 Valid, 7827 Invalid, 22 Unknown, 0 Unchecked, 13.65ms Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 60.09ms Time] [2021-11-12 23:45:38,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3602 states. [2021-11-12 23:45:38,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3602 to 3602. [2021-11-12 23:45:38,618 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) [2021-11-12 23:45:38,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3602 states to 3602 states and 5187 transitions. [2021-11-12 23:45:38,641 INFO L78 Accepts]: Start accepts. Automaton has 3602 states and 5187 transitions. Word has length 81 [2021-11-12 23:45:38,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:38,641 INFO L470 AbstractCegarLoop]: Abstraction has 3602 states and 5187 transitions. [2021-11-12 23:45:38,641 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) [2021-11-12 23:45:38,642 INFO L276 IsEmpty]: Start isEmpty. Operand 3602 states and 5187 transitions. [2021-11-12 23:45:38,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-12 23:45:38,644 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:38,645 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] [2021-11-12 23:45:38,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:38,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:38,865 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)] === [2021-11-12 23:45:38,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:38,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1402485744, now seen corresponding path program 1 times [2021-11-12 23:45:38,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:38,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [859328372] [2021-11-12 23:45:38,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:38,869 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:38,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:38,870 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:38,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:45:41,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:41,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 1503 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:45:41,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:42,008 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-12 23:45:42,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:42,397 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-12 23:45:42,397 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:42,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [859328372] [2021-11-12 23:45:42,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [859328372] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:45:42,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:45:42,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-12 23:45:42,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984511435] [2021-11-12 23:45:42,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:42,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:45:42,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:42,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:45:42,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:45:42,399 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) [2021-11-12 23:45:42,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:42,827 INFO L93 Difference]: Finished difference Result 3608 states and 5192 transitions. [2021-11-12 23:45:42,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:45:42,828 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 [2021-11-12 23:45:42,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:42,849 INFO L225 Difference]: With dead ends: 3608 [2021-11-12 23:45:42,849 INFO L226 Difference]: Without dead ends: 3606 [2021-11-12 23:45:42,852 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 [2021-11-12 23:45:42,853 INFO L933 BasicCegarLoop]: 2616 mSDtfsCounter, 2574 mSDsluCounter, 5211 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 72.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2580 SdHoareTripleChecker+Valid, 7827 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.04ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 77.23ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:42,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2580 Valid, 7827 Invalid, 22 Unknown, 0 Unchecked, 12.04ms Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 77.23ms Time] [2021-11-12 23:45:42,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3606 states. [2021-11-12 23:45:43,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3606 to 3606. [2021-11-12 23:45:43,177 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) [2021-11-12 23:45:43,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3606 states to 3606 states and 5190 transitions. [2021-11-12 23:45:43,199 INFO L78 Accepts]: Start accepts. Automaton has 3606 states and 5190 transitions. Word has length 95 [2021-11-12 23:45:43,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:43,199 INFO L470 AbstractCegarLoop]: Abstraction has 3606 states and 5190 transitions. [2021-11-12 23:45:43,200 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) [2021-11-12 23:45:43,200 INFO L276 IsEmpty]: Start isEmpty. Operand 3606 states and 5190 transitions. [2021-11-12 23:45:43,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-12 23:45:43,203 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:43,203 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] [2021-11-12 23:45:43,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:43,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:43,422 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)] === [2021-11-12 23:45:43,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:43,422 INFO L85 PathProgramCache]: Analyzing trace with hash -209413810, now seen corresponding path program 1 times [2021-11-12 23:45:43,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:43,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1962131520] [2021-11-12 23:45:43,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:43,425 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:43,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:43,427 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:43,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 23:45:45,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:46,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 1478 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:45:46,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:46,568 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-11-12 23:45:46,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:46,939 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-11-12 23:45:46,940 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:46,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1962131520] [2021-11-12 23:45:46,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1962131520] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:45:46,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:45:46,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-12 23:45:46,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518412677] [2021-11-12 23:45:46,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:46,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:45:46,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:46,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:45:46,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:45:46,941 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) [2021-11-12 23:45:47,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:47,319 INFO L93 Difference]: Finished difference Result 4850 states and 7026 transitions. [2021-11-12 23:45:47,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:45:47,320 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 [2021-11-12 23:45:47,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:47,344 INFO L225 Difference]: With dead ends: 4850 [2021-11-12 23:45:47,344 INFO L226 Difference]: Without dead ends: 4848 [2021-11-12 23:45:47,349 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 [2021-11-12 23:45:47,350 INFO L933 BasicCegarLoop]: 3437 mSDtfsCounter, 1890 mSDsluCounter, 8461 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 57.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1895 SdHoareTripleChecker+Valid, 11898 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.43ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 62.39ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:47,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1895 Valid, 11898 Invalid, 24 Unknown, 0 Unchecked, 13.43ms Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 62.39ms Time] [2021-11-12 23:45:47,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4848 states. [2021-11-12 23:45:47,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4848 to 4848. [2021-11-12 23:45:47,800 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) [2021-11-12 23:45:47,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4848 states to 4848 states and 7024 transitions. [2021-11-12 23:45:47,829 INFO L78 Accepts]: Start accepts. Automaton has 4848 states and 7024 transitions. Word has length 91 [2021-11-12 23:45:47,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:47,830 INFO L470 AbstractCegarLoop]: Abstraction has 4848 states and 7024 transitions. [2021-11-12 23:45:47,830 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) [2021-11-12 23:45:47,830 INFO L276 IsEmpty]: Start isEmpty. Operand 4848 states and 7024 transitions. [2021-11-12 23:45:47,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-12 23:45:47,832 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:47,833 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] [2021-11-12 23:45:47,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:48,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:48,057 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)] === [2021-11-12 23:45:48,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:48,058 INFO L85 PathProgramCache]: Analyzing trace with hash 145333438, now seen corresponding path program 1 times [2021-11-12 23:45:48,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:48,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1523238793] [2021-11-12 23:45:48,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:48,061 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:48,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:48,062 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:48,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 23:45:50,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:50,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 1485 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:45:50,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:51,395 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-12 23:45:51,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:51,773 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-12 23:45:51,773 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:51,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1523238793] [2021-11-12 23:45:51,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1523238793] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:45:51,773 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:45:51,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-12 23:45:51,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101319138] [2021-11-12 23:45:51,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:51,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:45:51,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:51,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:45:51,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:45:51,775 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) [2021-11-12 23:45:52,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:52,151 INFO L93 Difference]: Finished difference Result 4854 states and 7029 transitions. [2021-11-12 23:45:52,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:45:52,152 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 [2021-11-12 23:45:52,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:52,179 INFO L225 Difference]: With dead ends: 4854 [2021-11-12 23:45:52,179 INFO L226 Difference]: Without dead ends: 4852 [2021-11-12 23:45:52,184 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 [2021-11-12 23:45:52,185 INFO L933 BasicCegarLoop]: 2616 mSDtfsCounter, 2583 mSDsluCounter, 5211 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 55.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2587 SdHoareTripleChecker+Valid, 7827 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.93ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 59.49ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:52,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2587 Valid, 7827 Invalid, 22 Unknown, 0 Unchecked, 9.93ms Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 59.49ms Time] [2021-11-12 23:45:52,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4852 states. [2021-11-12 23:45:52,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4852 to 4852. [2021-11-12 23:45:52,780 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) [2021-11-12 23:45:52,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4852 states to 4852 states and 7027 transitions. [2021-11-12 23:45:52,809 INFO L78 Accepts]: Start accepts. Automaton has 4852 states and 7027 transitions. Word has length 96 [2021-11-12 23:45:52,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:52,810 INFO L470 AbstractCegarLoop]: Abstraction has 4852 states and 7027 transitions. [2021-11-12 23:45:52,810 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) [2021-11-12 23:45:52,810 INFO L276 IsEmpty]: Start isEmpty. Operand 4852 states and 7027 transitions. [2021-11-12 23:45:52,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-12 23:45:52,812 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:52,812 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] [2021-11-12 23:45:52,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:53,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:53,025 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)] === [2021-11-12 23:45:53,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:53,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1782967260, now seen corresponding path program 1 times [2021-11-12 23:45:53,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:53,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [224373690] [2021-11-12 23:45:53,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:53,028 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:53,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:53,028 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:53,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 23:45:55,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:55,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 1524 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:45:55,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:56,270 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-12 23:45:56,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:45:56,698 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-12 23:45:56,698 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:45:56,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [224373690] [2021-11-12 23:45:56,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [224373690] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:45:56,699 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:45:56,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-12 23:45:56,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300572129] [2021-11-12 23:45:56,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:45:56,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:45:56,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:45:56,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:45:56,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:45:56,700 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) [2021-11-12 23:45:57,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:45:57,135 INFO L93 Difference]: Finished difference Result 4858 states and 7032 transitions. [2021-11-12 23:45:57,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:45:57,136 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 [2021-11-12 23:45:57,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:45:57,164 INFO L225 Difference]: With dead ends: 4858 [2021-11-12 23:45:57,165 INFO L226 Difference]: Without dead ends: 4856 [2021-11-12 23:45:57,169 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 [2021-11-12 23:45:57,170 INFO L933 BasicCegarLoop]: 2616 mSDtfsCounter, 2574 mSDsluCounter, 5211 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 57.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2577 SdHoareTripleChecker+Valid, 7827 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.35ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 61.69ms IncrementalHoareTripleChecker+Time [2021-11-12 23:45:57,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2577 Valid, 7827 Invalid, 22 Unknown, 0 Unchecked, 10.35ms Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 61.69ms Time] [2021-11-12 23:45:57,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4856 states. [2021-11-12 23:45:57,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4856 to 4856. [2021-11-12 23:45:57,713 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) [2021-11-12 23:45:57,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4856 states to 4856 states and 7030 transitions. [2021-11-12 23:45:57,742 INFO L78 Accepts]: Start accepts. Automaton has 4856 states and 7030 transitions. Word has length 110 [2021-11-12 23:45:57,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:45:57,743 INFO L470 AbstractCegarLoop]: Abstraction has 4856 states and 7030 transitions. [2021-11-12 23:45:57,743 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) [2021-11-12 23:45:57,743 INFO L276 IsEmpty]: Start isEmpty. Operand 4856 states and 7030 transitions. [2021-11-12 23:45:57,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-12 23:45:57,746 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:45:57,746 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] [2021-11-12 23:45:57,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:45:57,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:45:57,973 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)] === [2021-11-12 23:45:57,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:45:57,974 INFO L85 PathProgramCache]: Analyzing trace with hash -827414914, now seen corresponding path program 1 times [2021-11-12 23:45:57,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:45:57,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1807097604] [2021-11-12 23:45:57,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:45:57,977 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:45:57,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:45:57,978 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:45:58,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 23:46:00,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:46:00,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:46:00,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:46:01,314 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-11-12 23:46:01,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:46:01,704 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-11-12 23:46:01,704 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:46:01,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1807097604] [2021-11-12 23:46:01,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1807097604] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:46:01,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:46:01,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-12 23:46:01,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274097566] [2021-11-12 23:46:01,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:46:01,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:46:01,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:46:01,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:46:01,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:46:01,706 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) [2021-11-12 23:46:02,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:46:02,171 INFO L93 Difference]: Finished difference Result 4862 states and 7035 transitions. [2021-11-12 23:46:02,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:46:02,172 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 [2021-11-12 23:46:02,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:46:02,192 INFO L225 Difference]: With dead ends: 4862 [2021-11-12 23:46:02,192 INFO L226 Difference]: Without dead ends: 4860 [2021-11-12 23:46:02,196 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 [2021-11-12 23:46:02,197 INFO L933 BasicCegarLoop]: 2616 mSDtfsCounter, 2583 mSDsluCounter, 5211 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 55.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2585 SdHoareTripleChecker+Valid, 7827 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.67ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 60.12ms IncrementalHoareTripleChecker+Time [2021-11-12 23:46:02,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2585 Valid, 7827 Invalid, 22 Unknown, 0 Unchecked, 10.67ms Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 60.12ms Time] [2021-11-12 23:46:02,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4860 states. [2021-11-12 23:46:02,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4860 to 4860. [2021-11-12 23:46:02,668 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) [2021-11-12 23:46:02,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4860 states to 4860 states and 7033 transitions. [2021-11-12 23:46:02,697 INFO L78 Accepts]: Start accepts. Automaton has 4860 states and 7033 transitions. Word has length 106 [2021-11-12 23:46:02,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:46:02,698 INFO L470 AbstractCegarLoop]: Abstraction has 4860 states and 7033 transitions. [2021-11-12 23:46:02,698 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) [2021-11-12 23:46:02,698 INFO L276 IsEmpty]: Start isEmpty. Operand 4860 states and 7033 transitions. [2021-11-12 23:46:02,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-12 23:46:02,701 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:46:02,701 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] [2021-11-12 23:46:02,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:46:02,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:46:02,925 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)] === [2021-11-12 23:46:02,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:46:02,926 INFO L85 PathProgramCache]: Analyzing trace with hash -193331172, now seen corresponding path program 1 times [2021-11-12 23:46:02,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:46:02,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2002657324] [2021-11-12 23:46:02,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:46:02,929 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:46:02,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:46:02,930 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:46:02,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 23:46:05,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:46:05,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 1538 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:46:05,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:46:06,405 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2021-11-12 23:46:06,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:46:06,882 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2021-11-12 23:46:06,882 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:46:06,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2002657324] [2021-11-12 23:46:06,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2002657324] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:46:06,882 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:46:06,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-12 23:46:06,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64313108] [2021-11-12 23:46:06,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:46:06,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:46:06,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:46:06,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:46:06,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:46:06,884 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) [2021-11-12 23:46:07,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:46:07,362 INFO L93 Difference]: Finished difference Result 4866 states and 7038 transitions. [2021-11-12 23:46:07,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:46:07,362 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 [2021-11-12 23:46:07,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:46:07,386 INFO L225 Difference]: With dead ends: 4866 [2021-11-12 23:46:07,386 INFO L226 Difference]: Without dead ends: 4862 [2021-11-12 23:46:07,390 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 [2021-11-12 23:46:07,390 INFO L933 BasicCegarLoop]: 2616 mSDtfsCounter, 2574 mSDsluCounter, 5211 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 56.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2575 SdHoareTripleChecker+Valid, 7827 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.05ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 61.02ms IncrementalHoareTripleChecker+Time [2021-11-12 23:46:07,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2575 Valid, 7827 Invalid, 22 Unknown, 0 Unchecked, 10.05ms Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 61.02ms Time] [2021-11-12 23:46:07,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4862 states. [2021-11-12 23:46:07,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4862 to 4862. [2021-11-12 23:46:07,897 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) [2021-11-12 23:46:07,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4862 states to 4862 states and 7034 transitions. [2021-11-12 23:46:07,933 INFO L78 Accepts]: Start accepts. Automaton has 4862 states and 7034 transitions. Word has length 120 [2021-11-12 23:46:07,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:46:07,934 INFO L470 AbstractCegarLoop]: Abstraction has 4862 states and 7034 transitions. [2021-11-12 23:46:07,934 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) [2021-11-12 23:46:07,934 INFO L276 IsEmpty]: Start isEmpty. Operand 4862 states and 7034 transitions. [2021-11-12 23:46:07,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-12 23:46:07,937 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:46:07,938 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] [2021-11-12 23:46:07,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:46:08,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:46:08,161 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)] === [2021-11-12 23:46:08,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:46:08,162 INFO L85 PathProgramCache]: Analyzing trace with hash -954292816, now seen corresponding path program 1 times [2021-11-12 23:46:08,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:46:08,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [852232445] [2021-11-12 23:46:08,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:46:08,165 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:46:08,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:46:08,166 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:46:08,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 23:46:10,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:46:10,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 1545 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:46:10,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:46:11,640 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2021-11-12 23:46:11,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:46:12,099 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2021-11-12 23:46:12,099 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:46:12,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [852232445] [2021-11-12 23:46:12,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [852232445] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:46:12,100 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:46:12,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-12 23:46:12,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131795957] [2021-11-12 23:46:12,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:46:12,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:46:12,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:46:12,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:46:12,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:46:12,102 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) [2021-11-12 23:46:12,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:46:12,566 INFO L93 Difference]: Finished difference Result 4862 states and 7034 transitions. [2021-11-12 23:46:12,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:46:12,566 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 [2021-11-12 23:46:12,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:46:12,583 INFO L225 Difference]: With dead ends: 4862 [2021-11-12 23:46:12,583 INFO L226 Difference]: Without dead ends: 4723 [2021-11-12 23:46:12,586 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 [2021-11-12 23:46:12,587 INFO L933 BasicCegarLoop]: 2614 mSDtfsCounter, 2570 mSDsluCounter, 5210 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2570 SdHoareTripleChecker+Valid, 7824 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.40ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 47.44ms IncrementalHoareTripleChecker+Time [2021-11-12 23:46:12,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2570 Valid, 7824 Invalid, 17 Unknown, 0 Unchecked, 9.40ms Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 47.44ms Time] [2021-11-12 23:46:12,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4723 states. [2021-11-12 23:46:13,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4723 to 4723. [2021-11-12 23:46:13,123 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) [2021-11-12 23:46:13,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4723 states to 4723 states and 6871 transitions. [2021-11-12 23:46:13,151 INFO L78 Accepts]: Start accepts. Automaton has 4723 states and 6871 transitions. Word has length 125 [2021-11-12 23:46:13,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:46:13,151 INFO L470 AbstractCegarLoop]: Abstraction has 4723 states and 6871 transitions. [2021-11-12 23:46:13,151 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) [2021-11-12 23:46:13,151 INFO L276 IsEmpty]: Start isEmpty. Operand 4723 states and 6871 transitions. [2021-11-12 23:46:13,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-11-12 23:46:13,158 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:46:13,159 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] [2021-11-12 23:46:13,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 23:46:13,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:46:13,373 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)] === [2021-11-12 23:46:13,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:46:13,374 INFO L85 PathProgramCache]: Analyzing trace with hash -254548618, now seen corresponding path program 1 times [2021-11-12 23:46:13,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:46:13,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1843057425] [2021-11-12 23:46:13,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:46:13,376 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:46:13,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:46:13,377 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:46:13,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 23:46:16,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:46:16,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 1992 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 23:46:16,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:46:17,276 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 180 proven. 3 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2021-11-12 23:46:17,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:46:18,333 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 3 proven. 54 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2021-11-12 23:46:18,333 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:46:18,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1843057425] [2021-11-12 23:46:18,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1843057425] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:46:18,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [928445443] [2021-11-12 23:46:18,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:46:18,334 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:46:18,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:46:18,336 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:46:18,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-12 23:46:19,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:46:19,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 1992 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:46:19,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:46:21,075 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 177 proven. 0 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2021-11-12 23:46:21,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:46:21,794 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 483 trivial. 0 not checked. [2021-11-12 23:46:21,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [928445443] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:46:21,795 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:46:21,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8, 8] total 10 [2021-11-12 23:46:21,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708249385] [2021-11-12 23:46:21,796 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:46:21,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:46:21,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:46:21,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:46:21,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:46:21,797 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) [2021-11-12 23:46:22,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:46:22,623 INFO L93 Difference]: Finished difference Result 7083 states and 10273 transitions. [2021-11-12 23:46:22,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:46:22,623 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 [2021-11-12 23:46:22,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:46:22,652 INFO L225 Difference]: With dead ends: 7083 [2021-11-12 23:46:22,652 INFO L226 Difference]: Without dead ends: 4727 [2021-11-12 23:46:22,673 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 [2021-11-12 23:46:22,674 INFO L933 BasicCegarLoop]: 4639 mSDtfsCounter, 2402 mSDsluCounter, 2477 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 280.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2402 SdHoareTripleChecker+Valid, 7116 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.45ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 301.78ms IncrementalHoareTripleChecker+Time [2021-11-12 23:46:22,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2402 Valid, 7116 Invalid, 97 Unknown, 0 Unchecked, 12.45ms Time], IncrementalHoareTripleChecker [12 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 301.78ms Time] [2021-11-12 23:46:22,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4727 states. [2021-11-12 23:46:23,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4727 to 4723. [2021-11-12 23:46:23,153 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) [2021-11-12 23:46:23,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4723 states to 4723 states and 6830 transitions. [2021-11-12 23:46:23,176 INFO L78 Accepts]: Start accepts. Automaton has 4723 states and 6830 transitions. Word has length 222 [2021-11-12 23:46:23,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:46:23,177 INFO L470 AbstractCegarLoop]: Abstraction has 4723 states and 6830 transitions. [2021-11-12 23:46:23,177 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) [2021-11-12 23:46:23,177 INFO L276 IsEmpty]: Start isEmpty. Operand 4723 states and 6830 transitions. [2021-11-12 23:46:23,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-11-12 23:46:23,184 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:46:23,184 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] [2021-11-12 23:46:23,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 23:46:23,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-12 23:46:23,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:46:23,597 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)] === [2021-11-12 23:46:23,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:46:23,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1603859444, now seen corresponding path program 1 times [2021-11-12 23:46:23,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:46:23,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [958828128] [2021-11-12 23:46:23,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:46:23,600 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:46:23,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:46:23,601 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:46:23,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 23:46:26,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:46:26,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 1992 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 23:46:26,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:46:27,508 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 180 proven. 3 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2021-11-12 23:46:27,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:46:28,514 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 3 proven. 54 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2021-11-12 23:46:28,514 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:46:28,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [958828128] [2021-11-12 23:46:28,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [958828128] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:46:28,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1866247291] [2021-11-12 23:46:28,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:46:28,515 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:46:28,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:46:28,516 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:46:28,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-12 23:46:31,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:46:32,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 1992 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-12 23:46:32,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:46:33,119 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 177 proven. 0 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2021-11-12 23:46:33,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:46:33,936 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2021-11-12 23:46:33,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1866247291] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:46:33,937 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:46:33,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 8, 6] total 13 [2021-11-12 23:46:33,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947262687] [2021-11-12 23:46:33,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:46:33,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:46:33,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:46:33,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:46:33,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:46:33,939 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) [2021-11-12 23:46:34,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:46:34,659 INFO L93 Difference]: Finished difference Result 9420 states and 13623 transitions. [2021-11-12 23:46:34,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:46:34,660 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 [2021-11-12 23:46:34,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:46:34,682 INFO L225 Difference]: With dead ends: 9420 [2021-11-12 23:46:34,682 INFO L226 Difference]: Without dead ends: 4723 [2021-11-12 23:46:34,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 885 GetRequests, 873 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:46:34,701 INFO L933 BasicCegarLoop]: 2537 mSDtfsCounter, 101 mSDsluCounter, 9991 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 71.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 12528 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.49ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 77.22ms IncrementalHoareTripleChecker+Time [2021-11-12 23:46:34,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 12528 Invalid, 12 Unknown, 0 Unchecked, 15.49ms Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 77.22ms Time] [2021-11-12 23:46:34,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4723 states. [2021-11-12 23:46:35,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4723 to 4723. [2021-11-12 23:46:35,161 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) [2021-11-12 23:46:35,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4723 states to 4723 states and 6828 transitions. [2021-11-12 23:46:35,182 INFO L78 Accepts]: Start accepts. Automaton has 4723 states and 6828 transitions. Word has length 222 [2021-11-12 23:46:35,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:46:35,183 INFO L470 AbstractCegarLoop]: Abstraction has 4723 states and 6828 transitions. [2021-11-12 23:46:35,183 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) [2021-11-12 23:46:35,183 INFO L276 IsEmpty]: Start isEmpty. Operand 4723 states and 6828 transitions. [2021-11-12 23:46:35,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-11-12 23:46:35,186 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:46:35,187 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] [2021-11-12 23:46:35,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-12 23:46:35,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-12 23:46:35,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:46:35,588 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)] === [2021-11-12 23:46:35,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:46:35,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1805215921, now seen corresponding path program 1 times [2021-11-12 23:46:35,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:46:35,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1615483049] [2021-11-12 23:46:35,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:46:35,591 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:46:35,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:46:35,592 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:46:35,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 23:46:38,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:46:38,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 2003 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 23:46:38,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:46:39,603 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 265 proven. 0 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2021-11-12 23:46:39,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:46:41,011 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 24 proven. 23 refuted. 0 times theorem prover too weak. 436 trivial. 0 not checked. [2021-11-12 23:46:41,011 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:46:41,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1615483049] [2021-11-12 23:46:41,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1615483049] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:46:41,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:46:41,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 21 [2021-11-12 23:46:41,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314199150] [2021-11-12 23:46:41,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:46:41,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:46:41,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:46:41,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:46:41,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-11-12 23:46:41,014 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) [2021-11-12 23:46:43,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:46:43,382 INFO L93 Difference]: Finished difference Result 9604 states and 13897 transitions. [2021-11-12 23:46:43,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-12 23:46:43,383 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 [2021-11-12 23:46:43,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:46:43,409 INFO L225 Difference]: With dead ends: 9604 [2021-11-12 23:46:43,409 INFO L226 Difference]: Without dead ends: 4913 [2021-11-12 23:46:43,431 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 [2021-11-12 23:46:43,431 INFO L933 BasicCegarLoop]: 2638 mSDtfsCounter, 202 mSDsluCounter, 26040 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1197.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 28678 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 33.88ms SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1286.10ms IncrementalHoareTripleChecker+Time [2021-11-12 23:46:43,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 28678 Invalid, 527 Unknown, 0 Unchecked, 33.88ms Time], IncrementalHoareTripleChecker [127 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 1286.10ms Time] [2021-11-12 23:46:43,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4913 states. [2021-11-12 23:46:44,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4913 to 4739. [2021-11-12 23:46:44,033 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) [2021-11-12 23:46:44,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4739 states to 4739 states and 6848 transitions. [2021-11-12 23:46:44,060 INFO L78 Accepts]: Start accepts. Automaton has 4739 states and 6848 transitions. Word has length 226 [2021-11-12 23:46:44,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:46:44,061 INFO L470 AbstractCegarLoop]: Abstraction has 4739 states and 6848 transitions. [2021-11-12 23:46:44,061 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) [2021-11-12 23:46:44,061 INFO L276 IsEmpty]: Start isEmpty. Operand 4739 states and 6848 transitions. [2021-11-12 23:46:44,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-11-12 23:46:44,067 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:46:44,068 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] [2021-11-12 23:46:44,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 23:46:44,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:46:44,287 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)] === [2021-11-12 23:46:44,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:46:44,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1008901278, now seen corresponding path program 1 times [2021-11-12 23:46:44,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:46:44,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1177113248] [2021-11-12 23:46:44,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:46:44,291 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:46:44,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:46:44,292 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:46:44,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 23:46:47,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:46:47,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 2090 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 23:46:47,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:46:48,458 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 265 proven. 0 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2021-11-12 23:46:48,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:46:50,098 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 24 proven. 23 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2021-11-12 23:46:50,098 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:46:50,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1177113248] [2021-11-12 23:46:50,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1177113248] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:46:50,099 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:46:50,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 23 [2021-11-12 23:46:50,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719746420] [2021-11-12 23:46:50,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:46:50,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:46:50,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:46:50,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:46:50,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-11-12 23:46:50,101 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) [2021-11-12 23:46:53,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:46:53,278 INFO L93 Difference]: Finished difference Result 9658 states and 13965 transitions. [2021-11-12 23:46:53,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-12 23:46:53,278 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 [2021-11-12 23:46:53,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:46:53,297 INFO L225 Difference]: With dead ends: 9658 [2021-11-12 23:46:53,297 INFO L226 Difference]: Without dead ends: 4951 [2021-11-12 23:46:53,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 546 GetRequests, 510 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=234, Invalid=1172, Unknown=0, NotChecked=0, Total=1406 [2021-11-12 23:46:53,320 INFO L933 BasicCegarLoop]: 2647 mSDtfsCounter, 220 mSDsluCounter, 28720 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1551.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 31367 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 27.81ms SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1662.91ms IncrementalHoareTripleChecker+Time [2021-11-12 23:46:53,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 31367 Invalid, 677 Unknown, 0 Unchecked, 27.81ms Time], IncrementalHoareTripleChecker [153 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 1662.91ms Time] [2021-11-12 23:46:53,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4951 states. [2021-11-12 23:46:53,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4951 to 4743. [2021-11-12 23:46:53,959 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) [2021-11-12 23:46:53,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4743 states to 4743 states and 6853 transitions. [2021-11-12 23:46:53,988 INFO L78 Accepts]: Start accepts. Automaton has 4743 states and 6853 transitions. Word has length 265 [2021-11-12 23:46:53,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:46:53,990 INFO L470 AbstractCegarLoop]: Abstraction has 4743 states and 6853 transitions. [2021-11-12 23:46:53,990 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) [2021-11-12 23:46:53,991 INFO L276 IsEmpty]: Start isEmpty. Operand 4743 states and 6853 transitions. [2021-11-12 23:46:53,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2021-11-12 23:46:53,999 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:46:53,999 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] [2021-11-12 23:46:54,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-12 23:46:54,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:46:54,222 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)] === [2021-11-12 23:46:54,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:46:54,222 INFO L85 PathProgramCache]: Analyzing trace with hash 2073938409, now seen corresponding path program 1 times [2021-11-12 23:46:54,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:46:54,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [869221811] [2021-11-12 23:46:54,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:46:54,226 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:46:54,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:46:54,227 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:46:54,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 23:46:57,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:46:58,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 2471 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-12 23:46:58,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:46:59,389 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 271 proven. 0 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2021-11-12 23:46:59,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:01,522 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 24 proven. 23 refuted. 0 times theorem prover too weak. 593 trivial. 0 not checked. [2021-11-12 23:47:01,523 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:47:01,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [869221811] [2021-11-12 23:47:01,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [869221811] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:47:01,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:47:01,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [15] total 27 [2021-11-12 23:47:01,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872763115] [2021-11-12 23:47:01,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:47:01,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-12 23:47:01,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:47:01,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-12 23:47:01,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2021-11-12 23:47:01,525 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) [2021-11-12 23:47:04,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:47:04,673 INFO L93 Difference]: Finished difference Result 9668 states and 13980 transitions. [2021-11-12 23:47:04,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-12 23:47:04,673 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 [2021-11-12 23:47:04,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:47:04,696 INFO L225 Difference]: With dead ends: 9668 [2021-11-12 23:47:04,697 INFO L226 Difference]: Without dead ends: 4957 [2021-11-12 23:47:04,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 703 GetRequests, 667 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=186, Invalid=1220, Unknown=0, NotChecked=0, Total=1406 [2021-11-12 23:47:04,718 INFO L933 BasicCegarLoop]: 2651 mSDtfsCounter, 208 mSDsluCounter, 34045 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1621.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 36696 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 34.00ms SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1735.71ms IncrementalHoareTripleChecker+Time [2021-11-12 23:47:04,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 36696 Invalid, 712 Unknown, 0 Unchecked, 34.00ms Time], IncrementalHoareTripleChecker [142 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 1735.71ms Time] [2021-11-12 23:47:04,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4957 states. [2021-11-12 23:47:05,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4957 to 4749. [2021-11-12 23:47:05,220 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) [2021-11-12 23:47:05,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4749 states to 4749 states and 6861 transitions. [2021-11-12 23:47:05,240 INFO L78 Accepts]: Start accepts. Automaton has 4749 states and 6861 transitions. Word has length 346 [2021-11-12 23:47:05,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:47:05,241 INFO L470 AbstractCegarLoop]: Abstraction has 4749 states and 6861 transitions. [2021-11-12 23:47:05,241 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) [2021-11-12 23:47:05,241 INFO L276 IsEmpty]: Start isEmpty. Operand 4749 states and 6861 transitions. [2021-11-12 23:47:05,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-11-12 23:47:05,250 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:47:05,251 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] [2021-11-12 23:47:05,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-12 23:47:05,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:47:05,473 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)] === [2021-11-12 23:47:05,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:47:05,474 INFO L85 PathProgramCache]: Analyzing trace with hash -135990715, now seen corresponding path program 1 times [2021-11-12 23:47:05,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:47:05,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1476176989] [2021-11-12 23:47:05,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:05,477 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:47:05,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:47:05,477 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:47:05,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-12 23:47:09,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:09,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 2809 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:47:09,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:10,952 INFO L134 CoverageAnalysis]: Checked inductivity of 614 backedges. 243 proven. 0 refuted. 0 times theorem prover too weak. 371 trivial. 0 not checked. [2021-11-12 23:47:10,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:12,029 INFO L134 CoverageAnalysis]: Checked inductivity of 614 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2021-11-12 23:47:12,029 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:47:12,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1476176989] [2021-11-12 23:47:12,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1476176989] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:47:12,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:47:12,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-12 23:47:12,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378315151] [2021-11-12 23:47:12,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:47:12,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:47:12,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:47:12,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:47:12,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:47:12,032 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) [2021-11-12 23:47:14,219 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 [] [2021-11-12 23:47:14,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:47:14,662 INFO L93 Difference]: Finished difference Result 9482 states and 13707 transitions. [2021-11-12 23:47:14,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:47:14,690 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 [2021-11-12 23:47:14,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:47:14,719 INFO L225 Difference]: With dead ends: 9482 [2021-11-12 23:47:14,720 INFO L226 Difference]: Without dead ends: 4767 [2021-11-12 23:47:14,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 779 GetRequests, 770 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:47:14,743 INFO L933 BasicCegarLoop]: 2538 mSDtfsCounter, 5 mSDsluCounter, 10144 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2084.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 12682 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.87ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2090.80ms IncrementalHoareTripleChecker+Time [2021-11-12 23:47:14,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 12682 Invalid, 22 Unknown, 0 Unchecked, 15.87ms Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 1 Unknown, 0 Unchecked, 2090.80ms Time] [2021-11-12 23:47:14,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4767 states. [2021-11-12 23:47:15,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4767 to 4759. [2021-11-12 23:47:15,308 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) [2021-11-12 23:47:15,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4759 states to 4759 states and 6875 transitions. [2021-11-12 23:47:15,327 INFO L78 Accepts]: Start accepts. Automaton has 4759 states and 6875 transitions. Word has length 390 [2021-11-12 23:47:15,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:47:15,328 INFO L470 AbstractCegarLoop]: Abstraction has 4759 states and 6875 transitions. [2021-11-12 23:47:15,328 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) [2021-11-12 23:47:15,328 INFO L276 IsEmpty]: Start isEmpty. Operand 4759 states and 6875 transitions. [2021-11-12 23:47:15,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2021-11-12 23:47:15,337 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:47:15,337 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] [2021-11-12 23:47:15,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-12 23:47:15,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:47:15,554 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)] === [2021-11-12 23:47:15,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:47:15,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1713472791, now seen corresponding path program 1 times [2021-11-12 23:47:15,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:47:15,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [862165381] [2021-11-12 23:47:15,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:15,559 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:47:15,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:47:15,560 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:47:15,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-12 23:47:19,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:20,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 2841 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:47:20,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:20,967 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 247 proven. 0 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2021-11-12 23:47:20,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:22,020 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 735 trivial. 0 not checked. [2021-11-12 23:47:22,020 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:47:22,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [862165381] [2021-11-12 23:47:22,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [862165381] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:47:22,020 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:47:22,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-12 23:47:22,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120907827] [2021-11-12 23:47:22,021 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:47:22,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:47:22,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:47:22,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:47:22,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:47:22,022 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) [2021-11-12 23:47:24,146 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:47:26,150 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:47:26,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:47:26,696 INFO L93 Difference]: Finished difference Result 9518 states and 13757 transitions. [2021-11-12 23:47:26,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:47:26,697 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 [2021-11-12 23:47:26,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:47:26,715 INFO L225 Difference]: With dead ends: 9518 [2021-11-12 23:47:26,716 INFO L226 Difference]: Without dead ends: 4793 [2021-11-12 23:47:26,739 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 [2021-11-12 23:47:26,739 INFO L933 BasicCegarLoop]: 2544 mSDtfsCounter, 21 mSDsluCounter, 10168 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 9 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4116.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 12712 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.35ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4144.88ms IncrementalHoareTripleChecker+Time [2021-11-12 23:47:26,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 12712 Invalid, 30 Unknown, 0 Unchecked, 13.35ms Time], IncrementalHoareTripleChecker [9 Valid, 19 Invalid, 2 Unknown, 0 Unchecked, 4144.88ms Time] [2021-11-12 23:47:26,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4793 states. [2021-11-12 23:47:27,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4793 to 4765. [2021-11-12 23:47:27,232 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) [2021-11-12 23:47:27,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4765 states to 4765 states and 6881 transitions. [2021-11-12 23:47:27,252 INFO L78 Accepts]: Start accepts. Automaton has 4765 states and 6881 transitions. Word has length 406 [2021-11-12 23:47:27,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:47:27,253 INFO L470 AbstractCegarLoop]: Abstraction has 4765 states and 6881 transitions. [2021-11-12 23:47:27,253 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) [2021-11-12 23:47:27,253 INFO L276 IsEmpty]: Start isEmpty. Operand 4765 states and 6881 transitions. [2021-11-12 23:47:27,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2021-11-12 23:47:27,261 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:47:27,262 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] [2021-11-12 23:47:27,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-12 23:47:27,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:47:27,477 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)] === [2021-11-12 23:47:27,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:47:27,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1440362043, now seen corresponding path program 1 times [2021-11-12 23:47:27,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:47:27,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1327205229] [2021-11-12 23:47:27,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:27,483 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:47:27,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:47:27,484 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:47:27,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-12 23:47:31,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:32,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 2873 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:47:32,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:34,428 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 280 proven. 0 refuted. 0 times theorem prover too weak. 604 trivial. 0 not checked. [2021-11-12 23:47:34,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:35,607 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 884 trivial. 0 not checked. [2021-11-12 23:47:35,607 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:47:35,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1327205229] [2021-11-12 23:47:35,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1327205229] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:47:35,607 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:47:35,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 3 [2021-11-12 23:47:35,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657570400] [2021-11-12 23:47:35,608 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:47:35,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:47:35,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:47:35,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:47:35,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:47:35,609 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) [2021-11-12 23:47:36,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:47:36,229 INFO L93 Difference]: Finished difference Result 12691 states and 18226 transitions. [2021-11-12 23:47:36,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:47:36,231 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 [2021-11-12 23:47:36,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:47:36,273 INFO L225 Difference]: With dead ends: 12691 [2021-11-12 23:47:36,273 INFO L226 Difference]: Without dead ends: 7960 [2021-11-12 23:47:36,290 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 [2021-11-12 23:47:36,291 INFO L933 BasicCegarLoop]: 4440 mSDtfsCounter, 1986 mSDsluCounter, 2506 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1986 SdHoareTripleChecker+Valid, 6946 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.36ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.37ms IncrementalHoareTripleChecker+Time [2021-11-12 23:47:36,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1986 Valid, 6946 Invalid, 5 Unknown, 0 Unchecked, 8.36ms Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 26.37ms Time] [2021-11-12 23:47:36,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7960 states. [2021-11-12 23:47:37,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7960 to 7956. [2021-11-12 23:47:37,278 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) [2021-11-12 23:47:37,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7956 states to 7956 states and 11384 transitions. [2021-11-12 23:47:37,317 INFO L78 Accepts]: Start accepts. Automaton has 7956 states and 11384 transitions. Word has length 422 [2021-11-12 23:47:37,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:47:37,318 INFO L470 AbstractCegarLoop]: Abstraction has 7956 states and 11384 transitions. [2021-11-12 23:47:37,318 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) [2021-11-12 23:47:37,318 INFO L276 IsEmpty]: Start isEmpty. Operand 7956 states and 11384 transitions. [2021-11-12 23:47:37,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2021-11-12 23:47:37,328 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:47:37,328 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] [2021-11-12 23:47:37,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-12 23:47:37,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:47:37,535 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)] === [2021-11-12 23:47:37,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:47:37,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1157163530, now seen corresponding path program 1 times [2021-11-12 23:47:37,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:47:37,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1644137673] [2021-11-12 23:47:37,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:37,539 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:47:37,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:47:37,540 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:47:37,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-12 23:47:41,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:41,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 2731 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-12 23:47:41,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:43,395 INFO L134 CoverageAnalysis]: Checked inductivity of 948 backedges. 381 proven. 0 refuted. 0 times theorem prover too weak. 567 trivial. 0 not checked. [2021-11-12 23:47:43,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:46,196 INFO L134 CoverageAnalysis]: Checked inductivity of 948 backedges. 36 proven. 23 refuted. 0 times theorem prover too weak. 889 trivial. 0 not checked. [2021-11-12 23:47:46,196 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:47:46,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1644137673] [2021-11-12 23:47:46,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1644137673] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:47:46,197 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:47:46,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [16] total 29 [2021-11-12 23:47:46,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709200662] [2021-11-12 23:47:46,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:47:46,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-12 23:47:46,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:47:46,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-12 23:47:46,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=743, Unknown=0, NotChecked=0, Total=812 [2021-11-12 23:47:46,203 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) [2021-11-12 23:47:50,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:47:50,693 INFO L93 Difference]: Finished difference Result 16430 states and 23521 transitions. [2021-11-12 23:47:50,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-12 23:47:50,693 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 [2021-11-12 23:47:50,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:47:50,723 INFO L225 Difference]: With dead ends: 16430 [2021-11-12 23:47:50,723 INFO L226 Difference]: Without dead ends: 8504 [2021-11-12 23:47:50,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 868 GetRequests, 824 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=266, Invalid=1804, Unknown=0, NotChecked=0, Total=2070 [2021-11-12 23:47:50,747 INFO L933 BasicCegarLoop]: 2655 mSDtfsCounter, 222 mSDsluCounter, 36739 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2047.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 39394 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 37.74ms SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2188.99ms IncrementalHoareTripleChecker+Time [2021-11-12 23:47:50,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 39394 Invalid, 865 Unknown, 0 Unchecked, 37.74ms Time], IncrementalHoareTripleChecker [154 Valid, 711 Invalid, 0 Unknown, 0 Unchecked, 2188.99ms Time] [2021-11-12 23:47:50,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8504 states. [2021-11-12 23:47:51,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8504 to 7958. [2021-11-12 23:47:51,482 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) [2021-11-12 23:47:51,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7958 states to 7958 states and 11388 transitions. [2021-11-12 23:47:51,515 INFO L78 Accepts]: Start accepts. Automaton has 7958 states and 11388 transitions. Word has length 425 [2021-11-12 23:47:51,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:47:51,516 INFO L470 AbstractCegarLoop]: Abstraction has 7958 states and 11388 transitions. [2021-11-12 23:47:51,516 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) [2021-11-12 23:47:51,516 INFO L276 IsEmpty]: Start isEmpty. Operand 7958 states and 11388 transitions. [2021-11-12 23:47:51,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 569 [2021-11-12 23:47:51,523 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:47:51,524 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] [2021-11-12 23:47:51,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-12 23:47:51,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:47:51,725 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)] === [2021-11-12 23:47:51,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:47:51,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1521216052, now seen corresponding path program 1 times [2021-11-12 23:47:51,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:47:51,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [692235552] [2021-11-12 23:47:51,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:51,728 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:47:51,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:47:51,729 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:47:51,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-12 23:47:54,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:47:55,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 2764 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:47:55,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:47:56,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4219 backedges. 859 proven. 0 refuted. 0 times theorem prover too weak. 3360 trivial. 0 not checked. [2021-11-12 23:47:56,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:47:58,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4219 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4219 trivial. 0 not checked. [2021-11-12 23:47:58,006 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:47:58,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [692235552] [2021-11-12 23:47:58,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [692235552] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:47:58,006 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:47:58,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 23:47:58,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763197335] [2021-11-12 23:47:58,007 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:47:58,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:47:58,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:47:58,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:47:58,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:47:58,008 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) [2021-11-12 23:47:58,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:47:58,969 INFO L93 Difference]: Finished difference Result 16312 states and 23351 transitions. [2021-11-12 23:47:58,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:47:58,970 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 [2021-11-12 23:47:58,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:47:59,005 INFO L225 Difference]: With dead ends: 16312 [2021-11-12 23:47:59,006 INFO L226 Difference]: Without dead ends: 8388 [2021-11-12 23:47:59,029 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 [2021-11-12 23:47:59,029 INFO L933 BasicCegarLoop]: 2656 mSDtfsCounter, 150 mSDsluCounter, 2586 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 162.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 5242 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.55ms SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 183.59ms IncrementalHoareTripleChecker+Time [2021-11-12 23:47:59,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 5242 Invalid, 64 Unknown, 0 Unchecked, 6.55ms Time], IncrementalHoareTripleChecker [29 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 183.59ms Time] [2021-11-12 23:47:59,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8388 states. [2021-11-12 23:47:59,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8388 to 7962. [2021-11-12 23:47:59,740 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) [2021-11-12 23:47:59,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7962 states to 7962 states and 11392 transitions. [2021-11-12 23:47:59,772 INFO L78 Accepts]: Start accepts. Automaton has 7962 states and 11392 transitions. Word has length 568 [2021-11-12 23:47:59,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:47:59,772 INFO L470 AbstractCegarLoop]: Abstraction has 7962 states and 11392 transitions. [2021-11-12 23:47:59,772 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) [2021-11-12 23:47:59,772 INFO L276 IsEmpty]: Start isEmpty. Operand 7962 states and 11392 transitions. [2021-11-12 23:47:59,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 585 [2021-11-12 23:47:59,780 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:47:59,780 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] [2021-11-12 23:47:59,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-12 23:47:59,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:47:59,981 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)] === [2021-11-12 23:47:59,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:47:59,982 INFO L85 PathProgramCache]: Analyzing trace with hash -854900434, now seen corresponding path program 1 times [2021-11-12 23:47:59,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:47:59,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1500451085] [2021-11-12 23:47:59,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:47:59,985 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:47:59,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:47:59,985 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:47:59,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-12 23:48:03,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:48:03,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 2796 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 23:48:03,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:48:05,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 336 proven. 3 refuted. 0 times theorem prover too weak. 4008 trivial. 0 not checked. [2021-11-12 23:48:05,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:48:07,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 21 proven. 24 refuted. 0 times theorem prover too weak. 4302 trivial. 0 not checked. [2021-11-12 23:48:07,123 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:48:07,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1500451085] [2021-11-12 23:48:07,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1500451085] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:48:07,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1089777716] [2021-11-12 23:48:07,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:48:07,124 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:48:07,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:48:07,129 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:48:07,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-12 23:48:10,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:48:11,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 2796 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 23:48:11,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:48:12,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 315 proven. 0 refuted. 0 times theorem prover too weak. 4032 trivial. 0 not checked. [2021-11-12 23:48:12,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:48:14,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4347 trivial. 0 not checked. [2021-11-12 23:48:14,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1089777716] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:48:14,498 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:48:14,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [9, 9] total 15 [2021-11-12 23:48:14,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070892733] [2021-11-12 23:48:14,502 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:48:14,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:48:14,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:48:14,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:48:14,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:48:14,504 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) [2021-11-12 23:48:16,981 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 [] [2021-11-12 23:48:17,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:48:17,602 INFO L93 Difference]: Finished difference Result 15930 states and 22807 transitions. [2021-11-12 23:48:17,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:48:17,603 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 [2021-11-12 23:48:17,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:48:17,713 INFO L225 Difference]: With dead ends: 15930 [2021-11-12 23:48:17,713 INFO L226 Difference]: Without dead ends: 8002 [2021-11-12 23:48:17,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2334 GetRequests, 2319 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:48:17,731 INFO L933 BasicCegarLoop]: 2548 mSDtfsCounter, 156 mSDsluCounter, 20273 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 40 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2253.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 22821 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.27ms SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2297.21ms IncrementalHoareTripleChecker+Time [2021-11-12 23:48:17,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 22821 Invalid, 97 Unknown, 0 Unchecked, 22.27ms Time], IncrementalHoareTripleChecker [40 Valid, 56 Invalid, 1 Unknown, 0 Unchecked, 2297.21ms Time] [2021-11-12 23:48:17,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8002 states. [2021-11-12 23:48:18,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8002 to 7962. [2021-11-12 23:48:18,350 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) [2021-11-12 23:48:18,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7962 states to 7962 states and 11388 transitions. [2021-11-12 23:48:18,492 INFO L78 Accepts]: Start accepts. Automaton has 7962 states and 11388 transitions. Word has length 584 [2021-11-12 23:48:18,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:48:18,493 INFO L470 AbstractCegarLoop]: Abstraction has 7962 states and 11388 transitions. [2021-11-12 23:48:18,493 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) [2021-11-12 23:48:18,493 INFO L276 IsEmpty]: Start isEmpty. Operand 7962 states and 11388 transitions. [2021-11-12 23:48:18,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 569 [2021-11-12 23:48:18,503 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:48:18,504 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] [2021-11-12 23:48:18,542 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-11-12 23:48:18,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-12 23:48:18,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:48:18,904 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)] === [2021-11-12 23:48:18,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:48:18,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1805775734, now seen corresponding path program 1 times [2021-11-12 23:48:18,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:48:18,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1027344724] [2021-11-12 23:48:18,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:48:18,908 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:48:18,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:48:18,908 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:48:18,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-12 23:48:22,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:48:22,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 2764 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-12 23:48:22,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:48:24,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4219 backedges. 271 proven. 0 refuted. 0 times theorem prover too weak. 3948 trivial. 0 not checked. [2021-11-12 23:48:24,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:48:26,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4219 backedges. 24 proven. 23 refuted. 0 times theorem prover too weak. 4172 trivial. 0 not checked. [2021-11-12 23:48:26,599 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:48:26,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1027344724] [2021-11-12 23:48:26,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1027344724] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:48:26,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:48:26,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [15] total 27 [2021-11-12 23:48:26,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271638420] [2021-11-12 23:48:26,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:48:26,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-12 23:48:26,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:48:26,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-12 23:48:26,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2021-11-12 23:48:26,602 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) [2021-11-12 23:48:30,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:48:30,104 INFO L93 Difference]: Finished difference Result 16328 states and 23385 transitions. [2021-11-12 23:48:30,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-12 23:48:30,105 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 [2021-11-12 23:48:30,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:48:30,134 INFO L225 Difference]: With dead ends: 16328 [2021-11-12 23:48:30,134 INFO L226 Difference]: Without dead ends: 8396 [2021-11-12 23:48:30,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1147 GetRequests, 1111 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=186, Invalid=1220, Unknown=0, NotChecked=0, Total=1406 [2021-11-12 23:48:30,159 INFO L933 BasicCegarLoop]: 2653 mSDtfsCounter, 208 mSDsluCounter, 34063 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1669.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 36716 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 35.68ms SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1783.28ms IncrementalHoareTripleChecker+Time [2021-11-12 23:48:30,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 36716 Invalid, 714 Unknown, 0 Unchecked, 35.68ms Time], IncrementalHoareTripleChecker [142 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 1783.28ms Time] [2021-11-12 23:48:30,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8396 states. [2021-11-12 23:48:30,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8396 to 7974. [2021-11-12 23:48:30,873 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) [2021-11-12 23:48:30,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7974 states to 7974 states and 11404 transitions. [2021-11-12 23:48:30,907 INFO L78 Accepts]: Start accepts. Automaton has 7974 states and 11404 transitions. Word has length 568 [2021-11-12 23:48:30,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:48:30,907 INFO L470 AbstractCegarLoop]: Abstraction has 7974 states and 11404 transitions. [2021-11-12 23:48:30,908 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) [2021-11-12 23:48:30,908 INFO L276 IsEmpty]: Start isEmpty. Operand 7974 states and 11404 transitions. [2021-11-12 23:48:30,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2021-11-12 23:48:30,914 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:48:30,914 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:48:30,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-12 23:48:31,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:48:31,115 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)] === [2021-11-12 23:48:31,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:48:31,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1376947987, now seen corresponding path program 1 times [2021-11-12 23:48:31,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:48:31,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1321478176] [2021-11-12 23:48:31,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:48:31,118 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:48:31,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:48:31,119 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:48:31,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-12 23:48:35,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:48:35,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 2887 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-12 23:48:35,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:48:39,934 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 323 proven. 39 refuted. 0 times theorem prover too weak. 522 trivial. 0 not checked. [2021-11-12 23:48:39,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:48:48,215 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 19 proven. 75 refuted. 0 times theorem prover too weak. 790 trivial. 0 not checked. [2021-11-12 23:48:48,216 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:48:48,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1321478176] [2021-11-12 23:48:48,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1321478176] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:48:48,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [23397237] [2021-11-12 23:48:48,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:48:48,216 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:48:48,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:48:48,221 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:48:48,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-12 23:48:52,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:48:52,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 2887 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-12 23:48:52,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:48:54,565 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 857 trivial. 0 not checked. [2021-11-12 23:48:54,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:48:56,851 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 863 trivial. 0 not checked. [2021-11-12 23:48:56,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [23397237] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:48:56,851 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:48:56,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [22, 21] total 46 [2021-11-12 23:48:56,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691105994] [2021-11-12 23:48:56,852 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:48:56,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:48:56,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:48:56,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:48:56,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1948, Unknown=0, NotChecked=0, Total=2070 [2021-11-12 23:48:56,854 INFO L87 Difference]: Start difference. First operand 7974 states and 11404 transitions. Second operand has 10 states, 10 states have (on average 16.4) internal successors, (164), 8 states have internal predecessors, (164), 4 states have call successors, (62), 2 states have call predecessors, (62), 4 states have return successors, (59), 6 states have call predecessors, (59), 4 states have call successors, (59) [2021-11-12 23:48:58,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:48:58,731 INFO L93 Difference]: Finished difference Result 16102 states and 23073 transitions. [2021-11-12 23:48:58,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:48:58,733 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 16.4) internal successors, (164), 8 states have internal predecessors, (164), 4 states have call successors, (62), 2 states have call predecessors, (62), 4 states have return successors, (59), 6 states have call predecessors, (59), 4 states have call successors, (59) Word has length 430 [2021-11-12 23:48:58,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:48:58,769 INFO L225 Difference]: With dead ends: 16102 [2021-11-12 23:48:58,769 INFO L226 Difference]: Without dead ends: 8162 [2021-11-12 23:48:58,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1717 GetRequests, 1672 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=129, Invalid=2033, Unknown=0, NotChecked=0, Total=2162 [2021-11-12 23:48:58,797 INFO L933 BasicCegarLoop]: 2606 mSDtfsCounter, 299 mSDsluCounter, 17452 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 868.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 20058 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.56ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 905.67ms IncrementalHoareTripleChecker+Time [2021-11-12 23:48:58,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [391 Valid, 20058 Invalid, 17 Unknown, 0 Unchecked, 21.56ms Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 905.67ms Time] [2021-11-12 23:48:58,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8162 states. [2021-11-12 23:48:59,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8162 to 7974. [2021-11-12 23:48:59,521 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) [2021-11-12 23:48:59,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7974 states to 7974 states and 11400 transitions. [2021-11-12 23:48:59,555 INFO L78 Accepts]: Start accepts. Automaton has 7974 states and 11400 transitions. Word has length 430 [2021-11-12 23:48:59,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:48:59,556 INFO L470 AbstractCegarLoop]: Abstraction has 7974 states and 11400 transitions. [2021-11-12 23:48:59,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 16.4) internal successors, (164), 8 states have internal predecessors, (164), 4 states have call successors, (62), 2 states have call predecessors, (62), 4 states have return successors, (59), 6 states have call predecessors, (59), 4 states have call successors, (59) [2021-11-12 23:48:59,556 INFO L276 IsEmpty]: Start isEmpty. Operand 7974 states and 11400 transitions. [2021-11-12 23:48:59,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2021-11-12 23:48:59,563 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:48:59,563 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] [2021-11-12 23:48:59,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-12 23:48:59,782 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 0 [2021-11-12 23:48:59,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:48:59,964 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)] === [2021-11-12 23:48:59,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:48:59,964 INFO L85 PathProgramCache]: Analyzing trace with hash 757358826, now seen corresponding path program 1 times [2021-11-12 23:48:59,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:48:59,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1909775027] [2021-11-12 23:48:59,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:48:59,967 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:48:59,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:48:59,968 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:48:59,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-12 23:49:04,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:49:04,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 2903 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-12 23:49:04,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:49:08,565 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 326 proven. 39 refuted. 0 times theorem prover too weak. 522 trivial. 0 not checked. [2021-11-12 23:49:08,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:49:16,637 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 19 proven. 75 refuted. 0 times theorem prover too weak. 793 trivial. 0 not checked. [2021-11-12 23:49:16,637 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:49:16,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1909775027] [2021-11-12 23:49:16,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1909775027] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:49:16,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2050647265] [2021-11-12 23:49:16,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:49:16,637 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:49:16,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:49:16,638 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:49:16,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-11-12 23:49:21,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:49:21,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 2903 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 23:49:21,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:49:23,257 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 305 proven. 0 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2021-11-12 23:49:23,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:49:25,474 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 884 trivial. 0 not checked. [2021-11-12 23:49:25,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2050647265] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:49:25,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:49:25,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [22, 21, 6] total 46 [2021-11-12 23:49:25,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790926735] [2021-11-12 23:49:25,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:49:25,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:49:25,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:49:25,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:49:25,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1949, Unknown=0, NotChecked=0, Total=2070 [2021-11-12 23:49:25,477 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) [2021-11-12 23:49:26,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:49:26,399 INFO L93 Difference]: Finished difference Result 12737 states and 18278 transitions. [2021-11-12 23:49:26,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:49:26,401 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 [2021-11-12 23:49:26,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:49:26,435 INFO L225 Difference]: With dead ends: 12737 [2021-11-12 23:49:26,435 INFO L226 Difference]: Without dead ends: 7984 [2021-11-12 23:49:26,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1733 GetRequests, 1688 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=127, Invalid=2035, Unknown=0, NotChecked=0, Total=2162 [2021-11-12 23:49:26,453 INFO L933 BasicCegarLoop]: 2536 mSDtfsCounter, 2 mSDsluCounter, 10139 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 70.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 12675 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.51ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 78.40ms IncrementalHoareTripleChecker+Time [2021-11-12 23:49:26,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 12675 Invalid, 19 Unknown, 0 Unchecked, 11.51ms Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 78.40ms Time] [2021-11-12 23:49:26,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7984 states. [2021-11-12 23:49:27,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7984 to 7984. [2021-11-12 23:49:27,080 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) [2021-11-12 23:49:27,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7984 states to 7984 states and 11412 transitions. [2021-11-12 23:49:27,110 INFO L78 Accepts]: Start accepts. Automaton has 7984 states and 11412 transitions. Word has length 434 [2021-11-12 23:49:27,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:49:27,111 INFO L470 AbstractCegarLoop]: Abstraction has 7984 states and 11412 transitions. [2021-11-12 23:49:27,112 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) [2021-11-12 23:49:27,112 INFO L276 IsEmpty]: Start isEmpty. Operand 7984 states and 11412 transitions. [2021-11-12 23:49:27,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 667 [2021-11-12 23:49:27,124 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:49:27,125 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, 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] [2021-11-12 23:49:27,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-12 23:49:27,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2021-11-12 23:49:27,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:49:27,541 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)] === [2021-11-12 23:49:27,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:49:27,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1875240049, now seen corresponding path program 1 times [2021-11-12 23:49:27,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:49:27,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1782779859] [2021-11-12 23:49:27,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:49:27,546 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:49:27,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:49:27,547 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:49:27,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-12 23:49:31,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:49:31,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 3258 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-12 23:49:31,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:49:36,380 INFO L134 CoverageAnalysis]: Checked inductivity of 4466 backedges. 326 proven. 39 refuted. 0 times theorem prover too weak. 4101 trivial. 0 not checked. [2021-11-12 23:49:36,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:49:45,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4466 backedges. 19 proven. 75 refuted. 0 times theorem prover too weak. 4372 trivial. 0 not checked. [2021-11-12 23:49:45,212 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:49:45,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1782779859] [2021-11-12 23:49:45,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1782779859] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:49:45,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1498211300] [2021-11-12 23:49:45,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:49:45,213 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:49:45,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:49:45,215 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:49:45,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-11-12 23:49:46,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:49:47,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 3258 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:49:47,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:49:49,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4466 backedges. 302 proven. 0 refuted. 0 times theorem prover too weak. 4164 trivial. 0 not checked. [2021-11-12 23:49:49,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:49:50,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4466 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4463 trivial. 0 not checked. [2021-11-12 23:49:50,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1498211300] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:49:50,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:49:50,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [22, 21, 4] total 44 [2021-11-12 23:49:50,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138053726] [2021-11-12 23:49:50,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:49:50,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:49:50,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:49:50,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:49:50,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1777, Unknown=0, NotChecked=0, Total=1892 [2021-11-12 23:49:50,840 INFO L87 Difference]: Start difference. First operand 7984 states and 11412 transitions. Second operand has 6 states, 6 states have (on average 32.333333333333336) internal successors, (194), 6 states have internal predecessors, (194), 3 states have call successors, (70), 2 states have call predecessors, (70), 2 states have return successors, (66), 3 states have call predecessors, (66), 3 states have call successors, (66) [2021-11-12 23:49:52,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:49:52,127 INFO L93 Difference]: Finished difference Result 12777 states and 18328 transitions. [2021-11-12 23:49:52,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:49:52,128 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 32.333333333333336) internal successors, (194), 6 states have internal predecessors, (194), 3 states have call successors, (70), 2 states have call predecessors, (70), 2 states have return successors, (66), 3 states have call predecessors, (66), 3 states have call successors, (66) Word has length 666 [2021-11-12 23:49:52,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:49:52,168 INFO L225 Difference]: With dead ends: 12777 [2021-11-12 23:49:52,168 INFO L226 Difference]: Without dead ends: 8014 [2021-11-12 23:49:52,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2662 GetRequests, 2618 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=124, Invalid=1946, Unknown=0, NotChecked=0, Total=2070 [2021-11-12 23:49:52,188 INFO L933 BasicCegarLoop]: 2538 mSDtfsCounter, 44 mSDsluCounter, 10091 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 274.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 12629 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.02ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 301.95ms IncrementalHoareTripleChecker+Time [2021-11-12 23:49:52,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 12629 Invalid, 73 Unknown, 0 Unchecked, 11.02ms Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 301.95ms Time] [2021-11-12 23:49:52,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8014 states. [2021-11-12 23:49:52,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8014 to 7986. [2021-11-12 23:49:52,910 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) [2021-11-12 23:49:52,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7986 states to 7986 states and 11414 transitions. [2021-11-12 23:49:52,940 INFO L78 Accepts]: Start accepts. Automaton has 7986 states and 11414 transitions. Word has length 666 [2021-11-12 23:49:52,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:49:52,941 INFO L470 AbstractCegarLoop]: Abstraction has 7986 states and 11414 transitions. [2021-11-12 23:49:52,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 32.333333333333336) internal successors, (194), 6 states have internal predecessors, (194), 3 states have call successors, (70), 2 states have call predecessors, (70), 2 states have return successors, (66), 3 states have call predecessors, (66), 3 states have call successors, (66) [2021-11-12 23:49:52,941 INFO L276 IsEmpty]: Start isEmpty. Operand 7986 states and 11414 transitions. [2021-11-12 23:49:52,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2021-11-12 23:49:52,948 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:49:52,948 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] [2021-11-12 23:49:52,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2021-11-12 23:49:53,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-11-12 23:49:53,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:49:53,349 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)] === [2021-11-12 23:49:53,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:49:53,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1560803930, now seen corresponding path program 1 times [2021-11-12 23:49:53,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:49:53,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2040493706] [2021-11-12 23:49:53,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:49:53,352 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:49:53,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:49:53,355 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:49:53,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-12 23:49:57,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:49:58,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 2963 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-12 23:49:58,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:50:02,348 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 326 proven. 39 refuted. 0 times theorem prover too weak. 522 trivial. 0 not checked. [2021-11-12 23:50:02,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:50:10,601 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 19 proven. 75 refuted. 0 times theorem prover too weak. 793 trivial. 0 not checked. [2021-11-12 23:50:10,601 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:50:10,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2040493706] [2021-11-12 23:50:10,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2040493706] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:50:10,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2007139701] [2021-11-12 23:50:10,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:50:10,602 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:50:10,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:50:10,602 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:50:10,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2021-11-12 23:50:15,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:50:15,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 2963 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 23:50:15,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:50:17,071 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 286 proven. 0 refuted. 0 times theorem prover too weak. 601 trivial. 0 not checked. [2021-11-12 23:50:17,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:50:19,393 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 884 trivial. 0 not checked. [2021-11-12 23:50:19,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2007139701] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:50:19,393 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:50:19,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [22, 21] total 46 [2021-11-12 23:50:19,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259015964] [2021-11-12 23:50:19,394 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:50:19,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:50:19,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:50:19,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:50:19,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1949, Unknown=0, NotChecked=0, Total=2070 [2021-11-12 23:50:19,397 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) [2021-11-12 23:50:21,843 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 [] [2021-11-12 23:50:22,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:50:22,322 INFO L93 Difference]: Finished difference Result 12755 states and 18298 transitions. [2021-11-12 23:50:22,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:50:22,342 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 [2021-11-12 23:50:22,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:50:22,371 INFO L225 Difference]: With dead ends: 12755 [2021-11-12 23:50:22,371 INFO L226 Difference]: Without dead ends: 7990 [2021-11-12 23:50:22,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1773 GetRequests, 1728 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=127, Invalid=2035, Unknown=0, NotChecked=0, Total=2162 [2021-11-12 23:50:22,389 INFO L933 BasicCegarLoop]: 2536 mSDtfsCounter, 4 mSDsluCounter, 15210 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2120.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 17746 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.32ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2132.49ms IncrementalHoareTripleChecker+Time [2021-11-12 23:50:22,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 17746 Invalid, 26 Unknown, 0 Unchecked, 15.32ms Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 1 Unknown, 0 Unchecked, 2132.49ms Time] [2021-11-12 23:50:22,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7990 states. [2021-11-12 23:50:23,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7990 to 7990. [2021-11-12 23:50:23,104 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) [2021-11-12 23:50:23,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7990 states to 7990 states and 11418 transitions. [2021-11-12 23:50:23,136 INFO L78 Accepts]: Start accepts. Automaton has 7990 states and 11418 transitions. Word has length 444 [2021-11-12 23:50:23,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:50:23,136 INFO L470 AbstractCegarLoop]: Abstraction has 7990 states and 11418 transitions. [2021-11-12 23:50:23,136 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) [2021-11-12 23:50:23,137 INFO L276 IsEmpty]: Start isEmpty. Operand 7990 states and 11418 transitions. [2021-11-12 23:50:23,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 668 [2021-11-12 23:50:23,145 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:50:23,146 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] [2021-11-12 23:50:23,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2021-11-12 23:50:23,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2021-11-12 23:50:23,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:50:23,547 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)] === [2021-11-12 23:50:23,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:50:23,547 INFO L85 PathProgramCache]: Analyzing trace with hash -240175726, now seen corresponding path program 1 times [2021-11-12 23:50:23,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:50:23,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [336836045] [2021-11-12 23:50:23,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:50:23,550 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:50:23,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:50:23,551 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:50:23,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-12 23:50:27,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:50:27,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 3072 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 23:50:27,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:50:28,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 493 proven. 3 refuted. 0 times theorem prover too weak. 4208 trivial. 0 not checked. [2021-11-12 23:50:28,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:50:31,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 39 proven. 24 refuted. 0 times theorem prover too weak. 4641 trivial. 0 not checked. [2021-11-12 23:50:31,068 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:50:31,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [336836045] [2021-11-12 23:50:31,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [336836045] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:50:31,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [779992627] [2021-11-12 23:50:31,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:50:31,071 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:50:31,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:50:31,093 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:50:31,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2021-11-12 23:50:35,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:50:35,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 3072 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 23:50:35,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:50:37,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 461 proven. 0 refuted. 0 times theorem prover too weak. 4243 trivial. 0 not checked. [2021-11-12 23:50:37,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:50:38,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4697 trivial. 0 not checked. [2021-11-12 23:50:38,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [779992627] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:50:38,846 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:50:38,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [9, 9] total 15 [2021-11-12 23:50:38,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699688616] [2021-11-12 23:50:38,848 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:50:38,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:50:38,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:50:38,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:50:38,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:50:38,849 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) [2021-11-12 23:50:41,022 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:50:43,023 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:50:45,027 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:50:46,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:50:46,244 INFO L93 Difference]: Finished difference Result 15954 states and 22809 transitions. [2021-11-12 23:50:46,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:50:46,245 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 [2021-11-12 23:50:46,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:50:46,268 INFO L225 Difference]: With dead ends: 15954 [2021-11-12 23:50:46,268 INFO L226 Difference]: Without dead ends: 7998 [2021-11-12 23:50:46,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2666 GetRequests, 2651 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:50:46,287 INFO L933 BasicCegarLoop]: 2552 mSDtfsCounter, 640 mSDsluCounter, 19884 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 372 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6416.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 640 SdHoareTripleChecker+Valid, 22436 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.23ms SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6522.41ms IncrementalHoareTripleChecker+Time [2021-11-12 23:50:46,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [640 Valid, 22436 Invalid, 413 Unknown, 0 Unchecked, 21.23ms Time], IncrementalHoareTripleChecker [372 Valid, 38 Invalid, 3 Unknown, 0 Unchecked, 6522.41ms Time] [2021-11-12 23:50:46,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7998 states. [2021-11-12 23:50:46,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7998 to 7990. [2021-11-12 23:50:46,905 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) [2021-11-12 23:50:46,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7990 states to 7990 states and 11414 transitions. [2021-11-12 23:50:46,936 INFO L78 Accepts]: Start accepts. Automaton has 7990 states and 11414 transitions. Word has length 667 [2021-11-12 23:50:46,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:50:46,937 INFO L470 AbstractCegarLoop]: Abstraction has 7990 states and 11414 transitions. [2021-11-12 23:50:46,937 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) [2021-11-12 23:50:46,937 INFO L276 IsEmpty]: Start isEmpty. Operand 7990 states and 11414 transitions. [2021-11-12 23:50:46,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 652 [2021-11-12 23:50:46,946 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:50:46,946 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] [2021-11-12 23:50:46,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-11-12 23:50:47,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2021-11-12 23:50:47,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:50:47,347 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)] === [2021-11-12 23:50:47,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:50:47,347 INFO L85 PathProgramCache]: Analyzing trace with hash -57308690, now seen corresponding path program 1 times [2021-11-12 23:50:47,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:50:47,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [118240989] [2021-11-12 23:50:47,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:50:47,350 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:50:47,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:50:47,351 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:50:47,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-12 23:50:51,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:50:51,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 3040 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-12 23:50:51,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:50:53,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4533 backedges. 387 proven. 0 refuted. 0 times theorem prover too weak. 4146 trivial. 0 not checked. [2021-11-12 23:50:53,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:50:56,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4533 backedges. 36 proven. 23 refuted. 0 times theorem prover too weak. 4474 trivial. 0 not checked. [2021-11-12 23:50:56,377 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:50:56,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [118240989] [2021-11-12 23:50:56,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [118240989] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:50:56,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:50:56,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [16] total 29 [2021-11-12 23:50:56,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262213611] [2021-11-12 23:50:56,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:50:56,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-12 23:50:56,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:50:56,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-12 23:50:56,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=743, Unknown=0, NotChecked=0, Total=812 [2021-11-12 23:50:56,380 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) [2021-11-12 23:51:01,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:51:01,348 INFO L93 Difference]: Finished difference Result 13739 states and 19629 transitions. [2021-11-12 23:51:01,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-12 23:51:01,348 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 [2021-11-12 23:51:01,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:51:01,365 INFO L225 Difference]: With dead ends: 13739 [2021-11-12 23:51:01,365 INFO L226 Difference]: Without dead ends: 5779 [2021-11-12 23:51:01,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1320 GetRequests, 1276 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=266, Invalid=1804, Unknown=0, NotChecked=0, Total=2070 [2021-11-12 23:51:01,382 INFO L933 BasicCegarLoop]: 2654 mSDtfsCounter, 222 mSDsluCounter, 36725 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2374.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 39379 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 38.04ms SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2527.72ms IncrementalHoareTripleChecker+Time [2021-11-12 23:51:01,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 39379 Invalid, 865 Unknown, 0 Unchecked, 38.04ms Time], IncrementalHoareTripleChecker [154 Valid, 711 Invalid, 0 Unknown, 0 Unchecked, 2527.72ms Time] [2021-11-12 23:51:01,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5779 states. [2021-11-12 23:51:01,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5779 to 5235. [2021-11-12 23:51:01,797 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) [2021-11-12 23:51:01,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5235 states to 5235 states and 7469 transitions. [2021-11-12 23:51:01,818 INFO L78 Accepts]: Start accepts. Automaton has 5235 states and 7469 transitions. Word has length 651 [2021-11-12 23:51:01,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:51:01,819 INFO L470 AbstractCegarLoop]: Abstraction has 5235 states and 7469 transitions. [2021-11-12 23:51:01,819 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) [2021-11-12 23:51:01,819 INFO L276 IsEmpty]: Start isEmpty. Operand 5235 states and 7469 transitions. [2021-11-12 23:51:01,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2021-11-12 23:51:01,825 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:51:01,826 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] [2021-11-12 23:51:01,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-11-12 23:51:02,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:51:02,037 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)] === [2021-11-12 23:51:02,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:51:02,038 INFO L85 PathProgramCache]: Analyzing trace with hash -47289750, now seen corresponding path program 1 times [2021-11-12 23:51:02,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:51:02,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1177657563] [2021-11-12 23:51:02,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:51:02,041 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:51:02,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:51:02,041 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:51:02,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-12 23:51:06,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:51:06,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 3023 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-12 23:51:06,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:51:11,390 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 336 proven. 39 refuted. 0 times theorem prover too weak. 522 trivial. 0 not checked. [2021-11-12 23:51:11,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:51:20,395 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 19 proven. 85 refuted. 0 times theorem prover too weak. 793 trivial. 0 not checked. [2021-11-12 23:51:20,395 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:51:20,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1177657563] [2021-11-12 23:51:20,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1177657563] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:51:20,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1716380754] [2021-11-12 23:51:20,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:51:20,396 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:51:20,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:51:20,397 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:51:20,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2021-11-12 23:51:38,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:51:38,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 3023 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:51:38,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:51:42,235 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 897 trivial. 0 not checked. [2021-11-12 23:51:42,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:51:44,207 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 897 trivial. 0 not checked. [2021-11-12 23:51:44,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1716380754] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:51:44,207 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:51:44,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [22, 21] total 43 [2021-11-12 23:51:44,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662585658] [2021-11-12 23:51:44,209 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:51:44,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:51:44,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:51:44,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:51:44,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1693, Unknown=0, NotChecked=0, Total=1806 [2021-11-12 23:51:44,211 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) [2021-11-12 23:51:44,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:51:44,968 INFO L93 Difference]: Finished difference Result 5235 states and 7469 transitions. [2021-11-12 23:51:44,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:51:44,969 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 [2021-11-12 23:51:44,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:51:44,986 INFO L225 Difference]: With dead ends: 5235 [2021-11-12 23:51:44,986 INFO L226 Difference]: Without dead ends: 5233 [2021-11-12 23:51:44,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1814 GetRequests, 1771 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=126, Invalid=1854, Unknown=0, NotChecked=0, Total=1980 [2021-11-12 23:51:44,990 INFO L933 BasicCegarLoop]: 3126 mSDtfsCounter, 1582 mSDsluCounter, 14106 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1583 SdHoareTripleChecker+Valid, 17232 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.77ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.86ms IncrementalHoareTripleChecker+Time [2021-11-12 23:51:44,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1583 Valid, 17232 Invalid, 9 Unknown, 0 Unchecked, 16.77ms Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 25.86ms Time] [2021-11-12 23:51:44,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5233 states. [2021-11-12 23:51:45,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5233 to 5233. [2021-11-12 23:51:45,479 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) [2021-11-12 23:51:45,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5233 states to 5233 states and 7466 transitions. [2021-11-12 23:51:45,498 INFO L78 Accepts]: Start accepts. Automaton has 5233 states and 7466 transitions. Word has length 454 [2021-11-12 23:51:45,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:51:45,498 INFO L470 AbstractCegarLoop]: Abstraction has 5233 states and 7466 transitions. [2021-11-12 23:51:45,498 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) [2021-11-12 23:51:45,498 INFO L276 IsEmpty]: Start isEmpty. Operand 5233 states and 7466 transitions. [2021-11-12 23:51:45,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 708 [2021-11-12 23:51:45,507 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:51:45,507 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] [2021-11-12 23:51:45,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (46)] Forceful destruction successful, exit code 0 [2021-11-12 23:51:45,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-11-12 23:51:45,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:51:45,908 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)] === [2021-11-12 23:51:45,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:51:45,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1123885302, now seen corresponding path program 1 times [2021-11-12 23:51:45,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:51:45,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [325318198] [2021-11-12 23:51:45,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:51:45,912 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:51:45,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:51:45,913 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:51:45,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-11-12 23:51:49,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:51:50,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 3260 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-12 23:51:50,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:51:55,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4574 backedges. 406 proven. 39 refuted. 0 times theorem prover too weak. 4129 trivial. 0 not checked. [2021-11-12 23:51:55,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:04,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4574 backedges. 19 proven. 88 refuted. 0 times theorem prover too weak. 4467 trivial. 0 not checked. [2021-11-12 23:52:04,832 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:52:04,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [325318198] [2021-11-12 23:52:04,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [325318198] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:52:04,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [929155553] [2021-11-12 23:52:04,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:04,833 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:52:04,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:52:04,837 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:52:04,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2021-11-12 23:52:06,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:06,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 3260 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-12 23:52:06,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:12,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4574 backedges. 314 proven. 7 refuted. 0 times theorem prover too weak. 4253 trivial. 0 not checked. [2021-11-12 23:52:12,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:16,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4574 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4574 trivial. 0 not checked. [2021-11-12 23:52:16,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [929155553] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:52:16,750 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:52:16,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [22, 21, 14] total 56 [2021-11-12 23:52:16,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128208974] [2021-11-12 23:52:16,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:52:16,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 23:52:16,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:52:16,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 23:52:16,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=2935, Unknown=0, NotChecked=0, Total=3080 [2021-11-12 23:52:16,754 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) [2021-11-12 23:52:19,275 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 [] [2021-11-12 23:52:22,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:52:22,705 INFO L93 Difference]: Finished difference Result 10188 states and 14635 transitions. [2021-11-12 23:52:22,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:52:22,707 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 [2021-11-12 23:52:22,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:52:22,727 INFO L225 Difference]: With dead ends: 10188 [2021-11-12 23:52:22,727 INFO L226 Difference]: Without dead ends: 5425 [2021-11-12 23:52:22,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2827 GetRequests, 2770 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=163, Invalid=3259, Unknown=0, NotChecked=0, Total=3422 [2021-11-12 23:52:22,743 INFO L933 BasicCegarLoop]: 2660 mSDtfsCounter, 863 mSDsluCounter, 14684 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 466 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3813.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 964 SdHoareTripleChecker+Valid, 17344 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.62ms SdHoareTripleChecker+Time, 466 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4152.06ms IncrementalHoareTripleChecker+Time [2021-11-12 23:52:22,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [964 Valid, 17344 Invalid, 664 Unknown, 0 Unchecked, 22.62ms Time], IncrementalHoareTripleChecker [466 Valid, 197 Invalid, 1 Unknown, 0 Unchecked, 4152.06ms Time] [2021-11-12 23:52:22,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5425 states. [2021-11-12 23:52:23,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5425 to 5237. [2021-11-12 23:52:23,273 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) [2021-11-12 23:52:23,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5237 states to 5237 states and 7470 transitions. [2021-11-12 23:52:23,293 INFO L78 Accepts]: Start accepts. Automaton has 5237 states and 7470 transitions. Word has length 707 [2021-11-12 23:52:23,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:52:23,294 INFO L470 AbstractCegarLoop]: Abstraction has 5237 states and 7470 transitions. [2021-11-12 23:52:23,295 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) [2021-11-12 23:52:23,295 INFO L276 IsEmpty]: Start isEmpty. Operand 5237 states and 7470 transitions. [2021-11-12 23:52:23,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2021-11-12 23:52:23,303 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:52:23,304 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] [2021-11-12 23:52:23,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:23,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (48)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:23,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:52:23,713 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)] === [2021-11-12 23:52:23,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:52:23,714 INFO L85 PathProgramCache]: Analyzing trace with hash 287267539, now seen corresponding path program 1 times [2021-11-12 23:52:23,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:52:23,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [826450826] [2021-11-12 23:52:23,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:23,717 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:52:23,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:52:23,718 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:52:23,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-11-12 23:52:28,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:28,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 2986 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-12 23:52:28,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:33,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 409 proven. 39 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2021-11-12 23:52:33,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:42,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 19 proven. 88 refuted. 0 times theorem prover too weak. 894 trivial. 0 not checked. [2021-11-12 23:52:42,376 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:52:42,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [826450826] [2021-11-12 23:52:42,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [826450826] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:52:42,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1744570830] [2021-11-12 23:52:42,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:42,377 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:52:42,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:52:42,466 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:52:42,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2021-11-12 23:52:46,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:47,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 2986 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-12 23:52:47,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:49,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2021-11-12 23:52:49,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:51,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 980 trivial. 0 not checked. [2021-11-12 23:52:51,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1744570830] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:52:51,540 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:52:51,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [22, 21] total 46 [2021-11-12 23:52:51,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199435198] [2021-11-12 23:52:51,541 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:52:51,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:52:51,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:52:51,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:52:51,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1948, Unknown=0, NotChecked=0, Total=2070 [2021-11-12 23:52:51,543 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) [2021-11-12 23:52:52,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:52:52,335 INFO L93 Difference]: Finished difference Result 10160 states and 14587 transitions. [2021-11-12 23:52:52,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:52:52,336 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 [2021-11-12 23:52:52,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:52:52,356 INFO L225 Difference]: With dead ends: 10160 [2021-11-12 23:52:52,356 INFO L226 Difference]: Without dead ends: 5393 [2021-11-12 23:52:52,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1961 GetRequests, 1916 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=129, Invalid=2033, Unknown=0, NotChecked=0, Total=2162 [2021-11-12 23:52:52,373 INFO L933 BasicCegarLoop]: 2653 mSDtfsCounter, 127 mSDsluCounter, 18151 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 79.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 20804 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.92ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 87.47ms IncrementalHoareTripleChecker+Time [2021-11-12 23:52:52,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 20804 Invalid, 19 Unknown, 0 Unchecked, 17.92ms Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 87.47ms Time] [2021-11-12 23:52:52,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5393 states. [2021-11-12 23:52:52,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5393 to 5237. [2021-11-12 23:52:52,925 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) [2021-11-12 23:52:52,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5237 states to 5237 states and 7468 transitions. [2021-11-12 23:52:52,945 INFO L78 Accepts]: Start accepts. Automaton has 5237 states and 7468 transitions. Word has length 491 [2021-11-12 23:52:52,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:52:52,946 INFO L470 AbstractCegarLoop]: Abstraction has 5237 states and 7468 transitions. [2021-11-12 23:52:52,946 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) [2021-11-12 23:52:52,946 INFO L276 IsEmpty]: Start isEmpty. Operand 5237 states and 7468 transitions. [2021-11-12 23:52:52,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 718 [2021-11-12 23:52:52,955 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:52:52,956 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] [2021-11-12 23:52:53,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:53,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (50)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:53,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:52:53,357 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)] === [2021-11-12 23:52:53,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:52:53,358 INFO L85 PathProgramCache]: Analyzing trace with hash -95160055, now seen corresponding path program 1 times [2021-11-12 23:52:53,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:52:53,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1226146996] [2021-11-12 23:52:53,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:53,361 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:52:53,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:52:53,362 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:52:53,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-11-12 23:52:57,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:57,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 3290 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-12 23:52:57,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:53:02,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4583 backedges. 412 proven. 39 refuted. 0 times theorem prover too weak. 4132 trivial. 0 not checked. [2021-11-12 23:53:02,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:53:12,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4583 backedges. 19 proven. 88 refuted. 0 times theorem prover too weak. 4476 trivial. 0 not checked. [2021-11-12 23:53:12,562 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:53:12,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1226146996] [2021-11-12 23:53:12,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1226146996] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:53:12,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [405411619] [2021-11-12 23:53:12,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:53:12,562 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:53:12,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:53:12,563 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:53:12,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2021-11-12 23:53:17,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:53:17,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 3290 conjuncts, 88 conjunts are in the unsatisfiable core [2021-11-12 23:53:17,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:53:24,733 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 [2021-11-12 23:53:24,759 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 [2021-11-12 23:53:25,183 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 [2021-11-12 23:53:25,190 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 [2021-11-12 23:53:27,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4583 backedges. 93 proven. 7 refuted. 0 times theorem prover too weak. 4483 trivial. 0 not checked. [2021-11-12 23:53:27,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:53:40,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4583 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4577 trivial. 0 not checked. [2021-11-12 23:53:40,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [405411619] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:53:40,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087882994] [2021-11-12 23:53:40,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:53:40,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:53:40,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:53:40,172 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:53:40,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-12 23:53:41,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:53:42,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 3290 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:53:42,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:53:44,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4583 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4583 trivial. 0 not checked. [2021-11-12 23:53:44,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:53:46,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4583 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4583 trivial. 0 not checked. [2021-11-12 23:53:46,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087882994] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:53:46,647 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-12 23:53:46,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [22, 21, 26, 16] total 79 [2021-11-12 23:53:46,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198764195] [2021-11-12 23:53:46,649 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:53:46,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:53:46,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:53:46,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:53:46,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=5954, Unknown=0, NotChecked=0, Total=6162 [2021-11-12 23:53:46,653 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) [2021-11-12 23:53:48,849 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:53:50,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:53:50,072 INFO L93 Difference]: Finished difference Result 5237 states and 7468 transitions. [2021-11-12 23:53:50,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:53:50,073 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 [2021-11-12 23:53:50,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:53:50,075 INFO L225 Difference]: With dead ends: 5237 [2021-11-12 23:53:50,075 INFO L226 Difference]: Without dead ends: 0 [2021-11-12 23:53:50,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4298 GetRequests, 4219 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1246 ImplicationChecksByTransitivity, 27.0s TimeCoverageRelationStatistics Valid=221, Invalid=6259, Unknown=0, NotChecked=0, Total=6480 [2021-11-12 23:53:50,095 INFO L933 BasicCegarLoop]: 3057 mSDtfsCounter, 1598 mSDsluCounter, 11008 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2213.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1599 SdHoareTripleChecker+Valid, 14065 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.06ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2216.55ms IncrementalHoareTripleChecker+Time [2021-11-12 23:53:50,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1599 Valid, 14065 Invalid, 8 Unknown, 0 Unchecked, 14.06ms Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 1 Unknown, 0 Unchecked, 2216.55ms Time] [2021-11-12 23:53:50,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-12 23:53:50,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-12 23:53:50,096 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) [2021-11-12 23:53:50,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-12 23:53:50,097 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 717 [2021-11-12 23:53:50,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:53:50,098 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-12 23:53:50,098 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) [2021-11-12 23:53:50,098 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-12 23:53:50,098 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-12 23:53:50,100 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ldv_assert_linux_kernel_locking_spinlock__one_thread_double_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2021-11-12 23:53:50,101 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ldv_assert_linux_kernel_locking_spinlock__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2021-11-12 23:53:50,101 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) [2021-11-12 23:53:50,168 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-11-12 23:53:50,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2021-11-12 23:53:50,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (52)] Ended with exit code 0 [2021-11-12 23:53:50,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41ad66-6d07-417a-bcb4-d380bf1f1a26/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:53:50,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-12 23:54:23,171 WARN L227 SmtUtils]: Spent 13.05s 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) [2021-11-12 23:54:43,982 WARN L227 SmtUtils]: Spent 13.37s 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)