./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 2c6afaf5bedcc2af934f5b2a4cc6fb91099717aaf97d30d9787d5c01855a1a43 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:59:25,977 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:59:25,979 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:59:26,011 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:59:26,011 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:59:26,013 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:59:26,015 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:59:26,017 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:59:26,019 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:59:26,021 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:59:26,022 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:59:26,024 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:59:26,024 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:59:26,026 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:59:26,027 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:59:26,029 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:59:26,031 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:59:26,032 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:59:26,035 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:59:26,038 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:59:26,040 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:59:26,042 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:59:26,044 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:59:26,045 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:59:26,049 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:59:26,050 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:59:26,050 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:59:26,052 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:59:26,052 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:59:26,054 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:59:26,054 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:59:26,056 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:59:26,057 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:59:26,058 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:59:26,060 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:59:26,060 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:59:26,061 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:59:26,062 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:59:26,062 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:59:26,064 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:59:26,065 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:59:26,066 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-19 13:59:26,093 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:59:26,093 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:59:26,094 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:59:26,095 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:59:26,095 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:59:26,095 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:59:26,096 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:59:26,096 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 13:59:26,097 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:59:26,097 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:59:26,097 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 13:59:26,098 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 13:59:26,098 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:59:26,099 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 13:59:26,099 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 13:59:26,099 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 13:59:26,100 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:59:26,101 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 13:59:26,101 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:59:26,101 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:59:26,102 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:59:26,102 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:59:26,102 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:59:26,103 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:59:26,103 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:59:26,103 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:59:26,103 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:59:26,104 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:59:26,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:59:26,104 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:59:26,104 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:59:26,105 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:59:26,105 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 13:59:26,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 13:59:26,106 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:59:26,106 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:59:26,107 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:59:26,108 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_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2c6afaf5bedcc2af934f5b2a4cc6fb91099717aaf97d30d9787d5c01855a1a43 [2021-11-19 13:59:26,437 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:59:26,479 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:59:26,482 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:59:26,483 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:59:26,484 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:59:26,486 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i [2021-11-19 13:59:26,574 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/data/efdd1d23d/786098c9e7af4b339209be731590fb50/FLAG5a25a24af [2021-11-19 13:59:27,558 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:59:27,562 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i [2021-11-19 13:59:27,602 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/data/efdd1d23d/786098c9e7af4b339209be731590fb50/FLAG5a25a24af [2021-11-19 13:59:28,002 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/data/efdd1d23d/786098c9e7af4b339209be731590fb50 [2021-11-19 13:59:28,005 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:59:28,006 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:59:28,008 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:59:28,009 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:59:28,012 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:59:28,013 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:59:28" (1/1) ... [2021-11-19 13:59:28,014 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1712498b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:28, skipping insertion in model container [2021-11-19 13:59:28,014 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:59:28" (1/1) ... [2021-11-19 13:59:28,022 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:59:28,122 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:59:29,303 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 13:59:29,354 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 13:59:29,355 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 13:59:29,357 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 13:59:29,417 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 13:59:29,424 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 13:59:29,687 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 13:59:29,688 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 13:59:29,689 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 13:59:29,690 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 13:59:29,697 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 13:59:29,697 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 13:59:29,699 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 13:59:29,704 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 13:59:29,716 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 13:59:29,717 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 13:59:29,718 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 13:59:29,720 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 13:59:29,759 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 13:59:29,766 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 13:59:29,945 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i[193323,193336] [2021-11-19 13:59:29,948 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i[193489,193502] [2021-11-19 13:59:29,950 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i[193653,193666] [2021-11-19 13:59:29,951 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i[193818,193831] [2021-11-19 13:59:29,954 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 13:59:29,970 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:59:30,012 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-19 13:59:30,014 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5633c262 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:30, skipping insertion in model container [2021-11-19 13:59:30,015 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:59:30,015 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 13:59:30,017 INFO L158 Benchmark]: Toolchain (without parser) took 2009.79ms. Allocated memory is still 127.9MB. Free memory was 88.8MB in the beginning and 54.9MB in the end (delta: 33.9MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. [2021-11-19 13:59:30,018 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 90.2MB. Free memory was 47.9MB in the beginning and 47.8MB in the end (delta: 45.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 13:59:30,019 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2006.98ms. Allocated memory is still 127.9MB. Free memory was 88.8MB in the beginning and 54.9MB in the end (delta: 33.9MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. [2021-11-19 13:59:30,021 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 90.2MB. Free memory was 47.9MB in the beginning and 47.8MB in the end (delta: 45.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2006.98ms. Allocated memory is still 127.9MB. Free memory was 88.8MB in the beginning and 54.9MB in the end (delta: 33.9MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 3910]: 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_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 2c6afaf5bedcc2af934f5b2a4cc6fb91099717aaf97d30d9787d5c01855a1a43 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:59:32,375 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:59:32,378 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:59:32,434 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:59:32,435 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:59:32,440 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:59:32,442 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:59:32,446 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:59:32,450 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:59:32,461 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:59:32,463 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:59:32,465 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:59:32,466 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:59:32,469 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:59:32,471 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:59:32,477 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:59:32,479 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:59:32,481 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:59:32,483 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:59:32,493 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:59:32,495 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:59:32,497 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:59:32,500 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:59:32,502 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:59:32,511 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:59:32,512 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:59:32,512 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:59:32,515 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:59:32,515 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:59:32,517 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:59:32,517 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:59:32,518 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:59:32,520 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:59:32,522 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:59:32,523 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:59:32,524 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:59:32,544 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:59:32,545 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:59:32,545 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:59:32,547 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:59:32,548 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:59:32,549 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-19 13:59:32,596 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:59:32,597 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:59:32,599 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:59:32,599 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:59:32,599 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:59:32,600 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:59:32,600 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:59:32,600 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:59:32,600 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:59:32,600 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:59:32,603 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:59:32,603 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:59:32,603 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:59:32,604 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:59:32,604 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:59:32,604 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:59:32,604 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 13:59:32,605 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 13:59:32,605 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:59:32,605 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:59:32,605 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:59:32,606 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:59:32,606 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 13:59:32,606 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:59:32,606 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:59:32,607 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:59:32,607 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:59:32,607 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:59:32,607 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 13:59:32,608 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 13:59:32,608 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:59:32,608 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:59:32,608 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:59:32,608 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_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2c6afaf5bedcc2af934f5b2a4cc6fb91099717aaf97d30d9787d5c01855a1a43 [2021-11-19 13:59:33,043 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:59:33,080 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:59:33,083 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:59:33,085 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:59:33,086 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:59:33,088 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i [2021-11-19 13:59:33,157 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/data/6931c5b46/3b31b500ba8849378e652f753f3d8ccb/FLAGbfbf54d04 [2021-11-19 13:59:34,137 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:59:34,138 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i [2021-11-19 13:59:34,192 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/data/6931c5b46/3b31b500ba8849378e652f753f3d8ccb/FLAGbfbf54d04 [2021-11-19 13:59:34,545 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/data/6931c5b46/3b31b500ba8849378e652f753f3d8ccb [2021-11-19 13:59:34,547 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:59:34,550 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:59:34,554 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:59:34,554 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:59:34,558 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:59:34,559 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:59:34" (1/1) ... [2021-11-19 13:59:34,562 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3332948f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:34, skipping insertion in model container [2021-11-19 13:59:34,562 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:59:34" (1/1) ... [2021-11-19 13:59:34,569 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:59:34,731 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:59:36,443 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i[193323,193336] [2021-11-19 13:59:36,446 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i[193489,193502] [2021-11-19 13:59:36,447 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i[193653,193666] [2021-11-19 13:59:36,448 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i[193818,193831] [2021-11-19 13:59:36,472 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:59:36,521 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 13:59:36,578 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:59:36,903 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i[193323,193336] [2021-11-19 13:59:36,904 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i[193489,193502] [2021-11-19 13:59:36,905 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i[193653,193666] [2021-11-19 13:59:36,906 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i[193818,193831] [2021-11-19 13:59:36,921 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:59:36,946 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 13:59:37,225 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i[193323,193336] [2021-11-19 13:59:37,225 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i[193489,193502] [2021-11-19 13:59:37,226 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i[193653,193666] [2021-11-19 13:59:37,227 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i[193818,193831] [2021-11-19 13:59:37,232 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:59:37,340 INFO L208 MainTranslator]: Completed translation [2021-11-19 13:59:37,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:37 WrapperNode [2021-11-19 13:59:37,340 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:59:37,342 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 13:59:37,342 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 13:59:37,343 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 13:59:37,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:37" (1/1) ... [2021-11-19 13:59:37,448 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:37" (1/1) ... [2021-11-19 13:59:37,628 INFO L137 Inliner]: procedures = 246, calls = 999, calls flagged for inlining = 130, calls inlined = 118, statements flattened = 2893 [2021-11-19 13:59:37,629 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 13:59:37,630 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 13:59:37,631 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 13:59:37,631 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 13:59:37,640 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:37" (1/1) ... [2021-11-19 13:59:37,642 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:37" (1/1) ... [2021-11-19 13:59:37,674 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:37" (1/1) ... [2021-11-19 13:59:37,675 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:37" (1/1) ... [2021-11-19 13:59:37,797 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:37" (1/1) ... [2021-11-19 13:59:37,841 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:37" (1/1) ... [2021-11-19 13:59:37,869 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:37" (1/1) ... [2021-11-19 13:59:37,903 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 13:59:37,905 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 13:59:37,905 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 13:59:37,905 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 13:59:37,906 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:37" (1/1) ... [2021-11-19 13:59:37,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:59:37,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:59:37,936 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 13:59:37,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 13:59:37,976 INFO L130 BoogieDeclarations]: Found specification of procedure dput [2021-11-19 13:59:37,976 INFO L138 BoogieDeclarations]: Found implementation of procedure dput [2021-11-19 13:59:37,977 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-19 13:59:37,977 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-19 13:59:37,977 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 13:59:37,977 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-19 13:59:37,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-19 13:59:37,977 INFO L130 BoogieDeclarations]: Found specification of procedure file_inode [2021-11-19 13:59:37,978 INFO L138 BoogieDeclarations]: Found implementation of procedure file_inode [2021-11-19 13:59:37,978 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_write_unlock [2021-11-19 13:59:37,978 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_write_unlock [2021-11-19 13:59:37,978 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-19 13:59:37,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-19 13:59:37,978 INFO L130 BoogieDeclarations]: Found specification of procedure dget [2021-11-19 13:59:37,978 INFO L138 BoogieDeclarations]: Found implementation of procedure dget [2021-11-19 13:59:37,979 INFO L130 BoogieDeclarations]: Found specification of procedure copy_strings_kernel [2021-11-19 13:59:37,979 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_strings_kernel [2021-11-19 13:59:37,979 INFO L130 BoogieDeclarations]: Found specification of procedure simple_statfs [2021-11-19 13:59:37,979 INFO L138 BoogieDeclarations]: Found implementation of procedure simple_statfs [2021-11-19 13:59:37,979 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-19 13:59:37,979 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-19 13:59:37,980 INFO L130 BoogieDeclarations]: Found specification of procedure ERR_PTR [2021-11-19 13:59:37,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ERR_PTR [2021-11-19 13:59:37,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 13:59:37,980 INFO L130 BoogieDeclarations]: Found specification of procedure kill_node [2021-11-19 13:59:37,980 INFO L138 BoogieDeclarations]: Found implementation of procedure kill_node [2021-11-19 13:59:37,980 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_i_mutex_of_inode [2021-11-19 13:59:37,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_i_mutex_of_inode [2021-11-19 13:59:37,981 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 13:59:37,981 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-19 13:59:37,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-19 13:59:37,981 INFO L130 BoogieDeclarations]: Found specification of procedure allow_write_access [2021-11-19 13:59:37,982 INFO L138 BoogieDeclarations]: Found implementation of procedure allow_write_access [2021-11-19 13:59:37,982 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-19 13:59:37,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-19 13:59:37,982 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exit [2021-11-19 13:59:37,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exit [2021-11-19 13:59:37,982 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_EMGentry_exit_exit_misc_binfmt_7_2 [2021-11-19 13:59:37,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_EMGentry_exit_exit_misc_binfmt_7_2 [2021-11-19 13:59:37,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-19 13:59:37,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-19 13:59:37,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-19 13:59:37,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 13:59:37,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-19 13:59:37,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-19 13:59:37,984 INFO L130 BoogieDeclarations]: Found specification of procedure bm_evict_inode [2021-11-19 13:59:37,984 INFO L138 BoogieDeclarations]: Found implementation of procedure bm_evict_inode [2021-11-19 13:59:37,984 INFO L130 BoogieDeclarations]: Found specification of procedure kill_litter_super [2021-11-19 13:59:37,984 INFO L138 BoogieDeclarations]: Found implementation of procedure kill_litter_super [2021-11-19 13:59:37,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 13:59:37,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-19 13:59:37,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-19 13:59:37,985 INFO L130 BoogieDeclarations]: Found specification of procedure simple_read_from_buffer [2021-11-19 13:59:37,985 INFO L138 BoogieDeclarations]: Found implementation of procedure simple_read_from_buffer [2021-11-19 13:59:37,985 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-19 13:59:37,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-19 13:59:37,986 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-11-19 13:59:37,986 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-11-19 13:59:37,986 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-19 13:59:37,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-19 13:59:37,986 INFO L130 BoogieDeclarations]: Found specification of procedure parse_command [2021-11-19 13:59:37,986 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_command [2021-11-19 13:59:37,987 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_mutex__one_thread_double_lock [2021-11-19 13:59:37,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_mutex__one_thread_double_lock [2021-11-19 13:59:37,987 INFO L130 BoogieDeclarations]: Found specification of procedure bm_register_write [2021-11-19 13:59:37,987 INFO L138 BoogieDeclarations]: Found implementation of procedure bm_register_write [2021-11-19 13:59:37,987 INFO L130 BoogieDeclarations]: Found specification of procedure bm_entry_read [2021-11-19 13:59:37,987 INFO L138 BoogieDeclarations]: Found implementation of procedure bm_entry_read [2021-11-19 13:59:37,987 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-19 13:59:37,988 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-19 13:59:37,988 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_err_code [2021-11-19 13:59:37,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_err_code [2021-11-19 13:59:37,988 INFO L130 BoogieDeclarations]: Found specification of procedure bm_status_write [2021-11-19 13:59:37,988 INFO L138 BoogieDeclarations]: Found implementation of procedure bm_status_write [2021-11-19 13:59:37,988 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-19 13:59:37,989 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-19 13:59:37,989 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_kernel_locking_mutex__one_thread_double_unlock [2021-11-19 13:59:37,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_kernel_locking_mutex__one_thread_double_unlock [2021-11-19 13:59:37,989 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~C_INT [2021-11-19 13:59:37,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~C_INT [2021-11-19 13:59:37,989 INFO L130 BoogieDeclarations]: Found specification of procedure scanarg [2021-11-19 13:59:37,990 INFO L138 BoogieDeclarations]: Found implementation of procedure scanarg [2021-11-19 13:59:37,990 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-19 13:59:37,990 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-19 13:59:37,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 13:59:37,990 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_1 [2021-11-19 13:59:37,990 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_1 [2021-11-19 13:59:37,991 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2021-11-19 13:59:37,991 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_0 [2021-11-19 13:59:37,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_0 [2021-11-19 13:59:37,991 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_2 [2021-11-19 13:59:37,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_2 [2021-11-19 13:59:37,991 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_write_lock [2021-11-19 13:59:37,991 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_write_lock [2021-11-19 13:59:37,992 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2021-11-19 13:59:37,992 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2021-11-19 13:59:37,992 INFO L130 BoogieDeclarations]: Found specification of procedure bm_entry_write [2021-11-19 13:59:37,992 INFO L138 BoogieDeclarations]: Found implementation of procedure bm_entry_write [2021-11-19 13:59:37,992 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 13:59:37,992 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-19 13:59:37,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-19 13:59:37,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 13:59:37,993 INFO L130 BoogieDeclarations]: Found specification of procedure string_unescape_inplace [2021-11-19 13:59:37,993 INFO L138 BoogieDeclarations]: Found implementation of procedure string_unescape_inplace [2021-11-19 13:59:37,993 INFO L130 BoogieDeclarations]: Found specification of procedure default_llseek [2021-11-19 13:59:37,993 INFO L138 BoogieDeclarations]: Found implementation of procedure default_llseek [2021-11-19 13:59:37,994 INFO L130 BoogieDeclarations]: Found specification of procedure PTR_ERR [2021-11-19 13:59:37,994 INFO L138 BoogieDeclarations]: Found implementation of procedure PTR_ERR [2021-11-19 13:59:37,994 INFO L130 BoogieDeclarations]: Found specification of procedure bm_status_read [2021-11-19 13:59:37,994 INFO L138 BoogieDeclarations]: Found implementation of procedure bm_status_read [2021-11-19 13:59:37,994 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-19 13:59:37,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-19 13:59:37,995 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-19 13:59:37,995 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-19 13:59:37,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 13:59:37,995 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 13:59:37,995 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_i_mutex_of_inode [2021-11-19 13:59:37,995 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_i_mutex_of_inode [2021-11-19 13:59:37,996 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-11-19 13:59:37,996 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-11-19 13:59:38,671 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 13:59:38,674 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 13:59:38,980 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-19 13:59:47,418 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-19 13:59:47,490 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 13:59:47,508 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 13:59:47,509 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-19 13:59:47,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:59:47 BoogieIcfgContainer [2021-11-19 13:59:47,513 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 13:59:47,515 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 13:59:47,515 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 13:59:47,518 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 13:59:47,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:59:34" (1/3) ... [2021-11-19 13:59:47,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f175f93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:59:47, skipping insertion in model container [2021-11-19 13:59:47,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:37" (2/3) ... [2021-11-19 13:59:47,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f175f93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:59:47, skipping insertion in model container [2021-11-19 13:59:47,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:59:47" (3/3) ... [2021-11-19 13:59:47,521 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-kernel-locking-mutex_fs-binfmt_misc.cil.i [2021-11-19 13:59:47,526 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 13:59:47,527 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-19 13:59:47,583 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 13:59:47,589 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 13:59:47,590 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-19 13:59:47,635 INFO L276 IsEmpty]: Start isEmpty. Operand has 1002 states, 712 states have (on average 1.3075842696629214) internal successors, (931), 719 states have internal predecessors, (931), 238 states have call successors, (238), 50 states have call predecessors, (238), 49 states have return successors, (231), 231 states have call predecessors, (231), 231 states have call successors, (231) [2021-11-19 13:59:47,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2021-11-19 13:59:47,672 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:47,673 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:59:47,673 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 13:59:47,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:47,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1262322770, now seen corresponding path program 1 times [2021-11-19 13:59:47,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:59:47,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2042975697] [2021-11-19 13:59:47,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:47,697 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:59:47,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:59:47,700 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:59:47,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 13:59:48,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:48,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 1177 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:59:48,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:59:49,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 2484 trivial. 0 not checked. [2021-11-19 13:59:49,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:59:50,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2556 trivial. 0 not checked. [2021-11-19 13:59:50,501 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:59:50,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2042975697] [2021-11-19 13:59:50,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2042975697] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:59:50,502 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:59:50,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 13:59:50,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769376518] [2021-11-19 13:59:50,505 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:50,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:59:50,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:59:50,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:59:50,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:59:50,542 INFO L87 Difference]: Start difference. First operand has 1002 states, 712 states have (on average 1.3075842696629214) internal successors, (931), 719 states have internal predecessors, (931), 238 states have call successors, (238), 50 states have call predecessors, (238), 49 states have return successors, (231), 231 states have call predecessors, (231), 231 states have call successors, (231) Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) [2021-11-19 13:59:52,670 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:59:54,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:54,618 INFO L93 Difference]: Finished difference Result 3662 states and 5180 transitions. [2021-11-19 13:59:54,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:59:54,623 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) Word has length 294 [2021-11-19 13:59:54,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:54,680 INFO L225 Difference]: With dead ends: 3662 [2021-11-19 13:59:54,681 INFO L226 Difference]: Without dead ends: 2694 [2021-11-19 13:59:54,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 584 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:59:54,701 INFO L933 BasicCegarLoop]: 1762 mSDtfsCounter, 2468 mSDsluCounter, 2408 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 25 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2468 SdHoareTripleChecker+Valid, 4170 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:54,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2468 Valid, 4170 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 453 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2021-11-19 13:59:54,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2694 states. [2021-11-19 13:59:55,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2694 to 2677. [2021-11-19 13:59:55,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2677 states, 1939 states have (on average 1.3156266116554924) internal successors, (2551), 1956 states have internal predecessors, (2551), 595 states have call successors, (595), 141 states have call predecessors, (595), 140 states have return successors, (591), 591 states have call predecessors, (591), 591 states have call successors, (591) [2021-11-19 13:59:55,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2677 states to 2677 states and 3737 transitions. [2021-11-19 13:59:55,048 INFO L78 Accepts]: Start accepts. Automaton has 2677 states and 3737 transitions. Word has length 294 [2021-11-19 13:59:55,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:55,055 INFO L470 AbstractCegarLoop]: Abstraction has 2677 states and 3737 transitions. [2021-11-19 13:59:55,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) [2021-11-19 13:59:55,056 INFO L276 IsEmpty]: Start isEmpty. Operand 2677 states and 3737 transitions. [2021-11-19 13:59:55,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2021-11-19 13:59:55,080 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:55,081 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 24, 24, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:59:55,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 13:59:55,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:59:55,290 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 13:59:55,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:55,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1249632643, now seen corresponding path program 1 times [2021-11-19 13:59:55,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:59:55,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [763445356] [2021-11-19 13:59:55,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:55,294 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:59:55,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:59:55,295 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:59:55,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 13:59:56,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:56,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 1391 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:59:56,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:59:57,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2591 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 2519 trivial. 0 not checked. [2021-11-19 13:59:57,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:59:58,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2591 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2591 trivial. 0 not checked. [2021-11-19 13:59:58,054 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:59:58,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [763445356] [2021-11-19 13:59:58,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [763445356] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:59:58,054 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:59:58,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 13:59:58,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676788887] [2021-11-19 13:59:58,055 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:58,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:59:58,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:59:58,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:59:58,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:59:58,059 INFO L87 Difference]: Start difference. First operand 2677 states and 3737 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) [2021-11-19 14:00:00,172 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:00:00,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:00,573 INFO L93 Difference]: Finished difference Result 6401 states and 8847 transitions. [2021-11-19 14:00:00,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:00:00,577 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) Word has length 360 [2021-11-19 14:00:00,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:00,617 INFO L225 Difference]: With dead ends: 6401 [2021-11-19 14:00:00,617 INFO L226 Difference]: Without dead ends: 3777 [2021-11-19 14:00:00,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 718 GetRequests, 717 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:00:00,633 INFO L933 BasicCegarLoop]: 1522 mSDtfsCounter, 917 mSDsluCounter, 1322 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 917 SdHoareTripleChecker+Valid, 2844 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:00,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [917 Valid, 2844 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 52 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-11-19 14:00:00,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3777 states. [2021-11-19 14:00:00,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3777 to 3757. [2021-11-19 14:00:00,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3757 states, 2734 states have (on average 1.2984637893196782) internal successors, (3550), 2761 states have internal predecessors, (3550), 796 states have call successors, (796), 225 states have call predecessors, (796), 224 states have return successors, (792), 787 states have call predecessors, (792), 792 states have call successors, (792) [2021-11-19 14:00:00,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3757 states to 3757 states and 5138 transitions. [2021-11-19 14:00:00,890 INFO L78 Accepts]: Start accepts. Automaton has 3757 states and 5138 transitions. Word has length 360 [2021-11-19 14:00:00,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:00,893 INFO L470 AbstractCegarLoop]: Abstraction has 3757 states and 5138 transitions. [2021-11-19 14:00:00,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) [2021-11-19 14:00:00,893 INFO L276 IsEmpty]: Start isEmpty. Operand 3757 states and 5138 transitions. [2021-11-19 14:00:00,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2021-11-19 14:00:00,907 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:00,907 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 24, 24, 5, 5, 5, 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] [2021-11-19 14:00:00,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:01,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:01,131 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 14:00:01,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:01,132 INFO L85 PathProgramCache]: Analyzing trace with hash 201152334, now seen corresponding path program 1 times [2021-11-19 14:00:01,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:01,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [24032512] [2021-11-19 14:00:01,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:01,134 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:01,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:01,135 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:01,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:00:02,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:02,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 1380 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:00:02,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:03,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2607 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 2535 trivial. 0 not checked. [2021-11-19 14:00:03,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:03,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2607 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2607 trivial. 0 not checked. [2021-11-19 14:00:03,926 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:03,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [24032512] [2021-11-19 14:00:03,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [24032512] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:00:03,927 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:00:03,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 14:00:03,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201793234] [2021-11-19 14:00:03,928 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:03,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:00:03,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:03,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:00:03,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:00:03,930 INFO L87 Difference]: Start difference. First operand 3757 states and 5138 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (43), 3 states have call predecessors, (43), 3 states have call successors, (43) [2021-11-19 14:00:06,043 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:00:06,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:06,472 INFO L93 Difference]: Finished difference Result 10124 states and 13796 transitions. [2021-11-19 14:00:06,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:00:06,473 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (43), 3 states have call predecessors, (43), 3 states have call successors, (43) Word has length 363 [2021-11-19 14:00:06,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:06,526 INFO L225 Difference]: With dead ends: 10124 [2021-11-19 14:00:06,526 INFO L226 Difference]: Without dead ends: 6420 [2021-11-19 14:00:06,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 724 GetRequests, 723 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:00:06,543 INFO L933 BasicCegarLoop]: 1883 mSDtfsCounter, 1158 mSDsluCounter, 1323 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1158 SdHoareTripleChecker+Valid, 3206 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:06,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1158 Valid, 3206 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 52 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-11-19 14:00:06,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6420 states. [2021-11-19 14:00:06,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6420 to 6398. [2021-11-19 14:00:06,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6398 states, 4712 states have (on average 1.2958404074702887) internal successors, (6106), 4757 states have internal predecessors, (6106), 1281 states have call successors, (1281), 403 states have call predecessors, (1281), 402 states have return successors, (1277), 1262 states have call predecessors, (1277), 1277 states have call successors, (1277) [2021-11-19 14:00:06,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6398 states to 6398 states and 8664 transitions. [2021-11-19 14:00:06,927 INFO L78 Accepts]: Start accepts. Automaton has 6398 states and 8664 transitions. Word has length 363 [2021-11-19 14:00:06,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:06,928 INFO L470 AbstractCegarLoop]: Abstraction has 6398 states and 8664 transitions. [2021-11-19 14:00:06,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (46), 3 states have call predecessors, (46), 3 states have return successors, (43), 3 states have call predecessors, (43), 3 states have call successors, (43) [2021-11-19 14:00:06,929 INFO L276 IsEmpty]: Start isEmpty. Operand 6398 states and 8664 transitions. [2021-11-19 14:00:06,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2021-11-19 14:00:06,992 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:06,992 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 24, 24, 24, 24, 24, 24, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:07,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:07,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:07,193 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 14:00:07,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:07,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1615045178, now seen corresponding path program 1 times [2021-11-19 14:00:07,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:07,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1379957231] [2021-11-19 14:00:07,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:07,195 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:07,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:07,200 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:07,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:00:08,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:08,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 1282 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:00:08,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:09,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2826 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2826 trivial. 0 not checked. [2021-11-19 14:00:09,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:10,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2826 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2826 trivial. 0 not checked. [2021-11-19 14:00:10,830 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:10,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1379957231] [2021-11-19 14:00:10,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1379957231] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:00:10,831 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:00:10,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-19 14:00:10,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833778599] [2021-11-19 14:00:10,832 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:10,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:00:10,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:10,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:00:10,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:00:10,835 INFO L87 Difference]: Start difference. First operand 6398 states and 8664 transitions. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 5 states have internal predecessors, (87), 2 states have call successors, (69), 4 states have call predecessors, (69), 2 states have return successors, (66), 2 states have call predecessors, (66), 2 states have call successors, (66) [2021-11-19 14:00:11,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:11,261 INFO L93 Difference]: Finished difference Result 6607 states and 8871 transitions. [2021-11-19 14:00:11,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:00:11,262 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 5 states have internal predecessors, (87), 2 states have call successors, (69), 4 states have call predecessors, (69), 2 states have return successors, (66), 2 states have call predecessors, (66), 2 states have call successors, (66) Word has length 354 [2021-11-19 14:00:11,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:11,325 INFO L225 Difference]: With dead ends: 6607 [2021-11-19 14:00:11,325 INFO L226 Difference]: Without dead ends: 6605 [2021-11-19 14:00:11,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 709 GetRequests, 701 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:00:11,332 INFO L933 BasicCegarLoop]: 1379 mSDtfsCounter, 1143 mSDsluCounter, 4280 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1145 SdHoareTripleChecker+Valid, 5659 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:11,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1145 Valid, 5659 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:00:11,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6605 states. [2021-11-19 14:00:11,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6605 to 6605. [2021-11-19 14:00:11,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6605 states, 4845 states have (on average 1.2893704850361196) internal successors, (6247), 4890 states have internal predecessors, (6247), 1313 states have call successors, (1313), 445 states have call predecessors, (1313), 444 states have return successors, (1309), 1294 states have call predecessors, (1309), 1309 states have call successors, (1309) [2021-11-19 14:00:11,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6605 states to 6605 states and 8869 transitions. [2021-11-19 14:00:11,757 INFO L78 Accepts]: Start accepts. Automaton has 6605 states and 8869 transitions. Word has length 354 [2021-11-19 14:00:11,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:11,758 INFO L470 AbstractCegarLoop]: Abstraction has 6605 states and 8869 transitions. [2021-11-19 14:00:11,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 5 states have internal predecessors, (87), 2 states have call successors, (69), 4 states have call predecessors, (69), 2 states have return successors, (66), 2 states have call predecessors, (66), 2 states have call successors, (66) [2021-11-19 14:00:11,759 INFO L276 IsEmpty]: Start isEmpty. Operand 6605 states and 8869 transitions. [2021-11-19 14:00:11,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2021-11-19 14:00:11,770 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:11,771 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 24, 24, 5, 5, 5, 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] [2021-11-19 14:00:11,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-19 14:00:11,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:11,986 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 14:00:11,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:11,986 INFO L85 PathProgramCache]: Analyzing trace with hash 699868274, now seen corresponding path program 1 times [2021-11-19 14:00:11,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:11,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2079387309] [2021-11-19 14:00:11,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:11,988 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:11,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:11,992 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:12,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:00:12,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:13,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 1391 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:00:13,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:13,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2607 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 2535 trivial. 0 not checked. [2021-11-19 14:00:13,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:14,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2607 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2607 trivial. 0 not checked. [2021-11-19 14:00:14,455 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:14,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2079387309] [2021-11-19 14:00:14,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2079387309] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:00:14,455 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:00:14,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 14:00:14,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161713538] [2021-11-19 14:00:14,455 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:14,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:00:14,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:14,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:00:14,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:00:14,458 INFO L87 Difference]: Start difference. First operand 6605 states and 8869 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (48), 3 states have call predecessors, (48), 3 states have return successors, (45), 3 states have call predecessors, (45), 3 states have call successors, (45) [2021-11-19 14:00:16,528 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:00:17,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:17,138 INFO L93 Difference]: Finished difference Result 17925 states and 24041 transitions. [2021-11-19 14:00:17,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:00:17,139 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (48), 3 states have call predecessors, (48), 3 states have return successors, (45), 3 states have call predecessors, (45), 3 states have call successors, (45) Word has length 366 [2021-11-19 14:00:17,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:17,234 INFO L225 Difference]: With dead ends: 17925 [2021-11-19 14:00:17,234 INFO L226 Difference]: Without dead ends: 11373 [2021-11-19 14:00:17,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 730 GetRequests, 729 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:00:17,259 INFO L933 BasicCegarLoop]: 2146 mSDtfsCounter, 1158 mSDsluCounter, 1321 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1158 SdHoareTripleChecker+Valid, 3467 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:17,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1158 Valid, 3467 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 52 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-11-19 14:00:17,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11373 states. [2021-11-19 14:00:17,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11373 to 11351. [2021-11-19 14:00:17,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11351 states, 8408 states have (on average 1.28651284490961) internal successors, (10817), 8492 states have internal predecessors, (10817), 2163 states have call successors, (2163), 778 states have call predecessors, (2163), 777 states have return successors, (2159), 2124 states have call predecessors, (2159), 2159 states have call successors, (2159) [2021-11-19 14:00:17,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11351 states to 11351 states and 15139 transitions. [2021-11-19 14:00:17,902 INFO L78 Accepts]: Start accepts. Automaton has 11351 states and 15139 transitions. Word has length 366 [2021-11-19 14:00:17,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:17,902 INFO L470 AbstractCegarLoop]: Abstraction has 11351 states and 15139 transitions. [2021-11-19 14:00:17,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (48), 3 states have call predecessors, (48), 3 states have return successors, (45), 3 states have call predecessors, (45), 3 states have call successors, (45) [2021-11-19 14:00:17,903 INFO L276 IsEmpty]: Start isEmpty. Operand 11351 states and 15139 transitions. [2021-11-19 14:00:17,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2021-11-19 14:00:17,911 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:17,912 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 24, 24, 24, 24, 24, 24, 4, 4, 4, 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] [2021-11-19 14:00:17,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:18,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:18,138 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 14:00:18,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:18,138 INFO L85 PathProgramCache]: Analyzing trace with hash -2121529752, now seen corresponding path program 1 times [2021-11-19 14:00:18,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:18,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [478211394] [2021-11-19 14:00:18,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:18,139 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:18,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:18,140 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:18,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:00:18,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:19,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 1289 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:00:19,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:20,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2828 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2826 trivial. 0 not checked. [2021-11-19 14:00:20,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:21,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2828 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2826 trivial. 0 not checked. [2021-11-19 14:00:21,258 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:21,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [478211394] [2021-11-19 14:00:21,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [478211394] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:00:21,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:00:21,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2021-11-19 14:00:21,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181752966] [2021-11-19 14:00:21,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:21,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:00:21,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:21,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:00:21,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:00:21,260 INFO L87 Difference]: Start difference. First operand 11351 states and 15139 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (36), 3 states have call predecessors, (36), 1 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-19 14:00:21,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:21,818 INFO L93 Difference]: Finished difference Result 11357 states and 15144 transitions. [2021-11-19 14:00:21,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:00:21,818 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (36), 3 states have call predecessors, (36), 1 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) Word has length 359 [2021-11-19 14:00:21,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:21,865 INFO L225 Difference]: With dead ends: 11357 [2021-11-19 14:00:21,865 INFO L226 Difference]: Without dead ends: 11353 [2021-11-19 14:00:21,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 719 GetRequests, 711 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:00:21,872 INFO L933 BasicCegarLoop]: 1372 mSDtfsCounter, 1284 mSDsluCounter, 2734 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1285 SdHoareTripleChecker+Valid, 4106 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:21,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1285 Valid, 4106 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:00:21,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11353 states. [2021-11-19 14:00:22,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11353 to 11353. [2021-11-19 14:00:22,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11353 states, 8410 states have (on average 1.2863258026159334) internal successors, (10818), 8493 states have internal predecessors, (10818), 2163 states have call successors, (2163), 779 states have call predecessors, (2163), 777 states have return successors, (2159), 2124 states have call predecessors, (2159), 2159 states have call successors, (2159) [2021-11-19 14:00:22,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11353 states to 11353 states and 15140 transitions. [2021-11-19 14:00:22,563 INFO L78 Accepts]: Start accepts. Automaton has 11353 states and 15140 transitions. Word has length 359 [2021-11-19 14:00:22,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:22,565 INFO L470 AbstractCegarLoop]: Abstraction has 11353 states and 15140 transitions. [2021-11-19 14:00:22,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (36), 3 states have call predecessors, (36), 1 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-19 14:00:22,566 INFO L276 IsEmpty]: Start isEmpty. Operand 11353 states and 15140 transitions. [2021-11-19 14:00:22,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2021-11-19 14:00:22,577 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:22,577 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 24, 24, 24, 24, 24, 24, 4, 4, 4, 3, 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] [2021-11-19 14:00:22,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:22,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:22,800 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 14:00:22,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:22,800 INFO L85 PathProgramCache]: Analyzing trace with hash -528603462, now seen corresponding path program 1 times [2021-11-19 14:00:22,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:22,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2004152076] [2021-11-19 14:00:22,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:22,802 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:22,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:22,802 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:22,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 14:00:23,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:23,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 1296 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:00:23,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:24,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2834 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2830 trivial. 0 not checked. [2021-11-19 14:00:24,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:25,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2834 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2830 trivial. 0 not checked. [2021-11-19 14:00:25,703 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:25,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2004152076] [2021-11-19 14:00:25,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2004152076] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:00:25,704 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:00:25,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2021-11-19 14:00:25,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260303486] [2021-11-19 14:00:25,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:25,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:00:25,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:25,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:00:25,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:00:25,706 INFO L87 Difference]: Start difference. First operand 11353 states and 15140 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-19 14:00:26,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:26,312 INFO L93 Difference]: Finished difference Result 11353 states and 15140 transitions. [2021-11-19 14:00:26,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:00:26,312 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) Word has length 364 [2021-11-19 14:00:26,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:26,358 INFO L225 Difference]: With dead ends: 11353 [2021-11-19 14:00:26,358 INFO L226 Difference]: Without dead ends: 11199 [2021-11-19 14:00:26,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 729 GetRequests, 721 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:00:26,367 INFO L933 BasicCegarLoop]: 1370 mSDtfsCounter, 1280 mSDsluCounter, 2733 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1280 SdHoareTripleChecker+Valid, 4103 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:26,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1280 Valid, 4103 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:00:26,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11199 states. [2021-11-19 14:00:27,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11199 to 11127. [2021-11-19 14:00:27,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11127 states, 8249 states have (on average 1.2822160261849922) internal successors, (10577), 8308 states have internal predecessors, (10577), 2109 states have call successors, (2109), 767 states have call predecessors, (2109), 767 states have return successors, (2109), 2095 states have call predecessors, (2109), 2109 states have call successors, (2109) [2021-11-19 14:00:27,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11127 states to 11127 states and 14795 transitions. [2021-11-19 14:00:27,081 INFO L78 Accepts]: Start accepts. Automaton has 11127 states and 14795 transitions. Word has length 364 [2021-11-19 14:00:27,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:27,082 INFO L470 AbstractCegarLoop]: Abstraction has 11127 states and 14795 transitions. [2021-11-19 14:00:27,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-19 14:00:27,083 INFO L276 IsEmpty]: Start isEmpty. Operand 11127 states and 14795 transitions. [2021-11-19 14:00:27,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2021-11-19 14:00:27,108 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:27,108 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 24, 24, 24, 24, 24, 24, 8, 8, 8, 3, 3, 3, 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] [2021-11-19 14:00:27,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:27,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:27,322 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 14:00:27,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:27,322 INFO L85 PathProgramCache]: Analyzing trace with hash 287691581, now seen corresponding path program 1 times [2021-11-19 14:00:27,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:27,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1795949535] [2021-11-19 14:00:27,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:27,324 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:27,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:27,326 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:27,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 14:00:28,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:28,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 1528 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:00:28,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:29,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3014 backedges. 242 proven. 0 refuted. 0 times theorem prover too weak. 2772 trivial. 0 not checked. [2021-11-19 14:00:29,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:29,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3014 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2997 trivial. 0 not checked. [2021-11-19 14:00:29,918 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:29,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1795949535] [2021-11-19 14:00:29,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1795949535] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:00:29,919 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:00:29,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 14:00:29,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371476269] [2021-11-19 14:00:29,920 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:29,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:00:29,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:29,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:00:29,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:00:29,922 INFO L87 Difference]: Start difference. First operand 11127 states and 14795 transitions. Second operand has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 4 states have call successors, (55), 3 states have call predecessors, (55), 3 states have return successors, (52), 4 states have call predecessors, (52), 4 states have call successors, (52) [2021-11-19 14:00:31,998 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:00:34,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:34,327 INFO L93 Difference]: Finished difference Result 27233 states and 36251 transitions. [2021-11-19 14:00:34,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:00:34,328 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 4 states have call successors, (55), 3 states have call predecessors, (55), 3 states have return successors, (52), 4 states have call predecessors, (52), 4 states have call successors, (52) Word has length 444 [2021-11-19 14:00:34,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:34,395 INFO L225 Difference]: With dead ends: 27233 [2021-11-19 14:00:34,395 INFO L226 Difference]: Without dead ends: 16080 [2021-11-19 14:00:34,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 886 GetRequests, 884 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:00:34,433 INFO L933 BasicCegarLoop]: 2674 mSDtfsCounter, 2474 mSDsluCounter, 2234 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 17 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2474 SdHoareTripleChecker+Valid, 4908 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:34,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2474 Valid, 4908 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 487 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2021-11-19 14:00:34,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16080 states. [2021-11-19 14:00:35,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16080 to 16072. [2021-11-19 14:00:35,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16072 states, 11911 states have (on average 1.284191083872051) internal successors, (15296), 11992 states have internal predecessors, (15296), 3044 states have call successors, (3044), 1115 states have call predecessors, (3044), 1115 states have return successors, (3044), 3030 states have call predecessors, (3044), 3044 states have call successors, (3044) [2021-11-19 14:00:35,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16072 states to 16072 states and 21384 transitions. [2021-11-19 14:00:35,349 INFO L78 Accepts]: Start accepts. Automaton has 16072 states and 21384 transitions. Word has length 444 [2021-11-19 14:00:35,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:35,350 INFO L470 AbstractCegarLoop]: Abstraction has 16072 states and 21384 transitions. [2021-11-19 14:00:35,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 4 states have call successors, (55), 3 states have call predecessors, (55), 3 states have return successors, (52), 4 states have call predecessors, (52), 4 states have call successors, (52) [2021-11-19 14:00:35,351 INFO L276 IsEmpty]: Start isEmpty. Operand 16072 states and 21384 transitions. [2021-11-19 14:00:35,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2021-11-19 14:00:35,377 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:35,377 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 24, 24, 24, 24, 24, 24, 9, 9, 9, 4, 4, 4, 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] [2021-11-19 14:00:35,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:35,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:35,606 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 14:00:35,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:35,606 INFO L85 PathProgramCache]: Analyzing trace with hash 453951730, now seen corresponding path program 1 times [2021-11-19 14:00:35,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:35,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1332632064] [2021-11-19 14:00:35,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:35,608 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:35,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:35,610 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:35,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 14:00:36,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:36,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 1566 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-19 14:00:36,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:38,175 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 542 proven. 3 refuted. 0 times theorem prover too weak. 2704 trivial. 0 not checked. [2021-11-19 14:00:38,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:39,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 48 proven. 36 refuted. 0 times theorem prover too weak. 3165 trivial. 0 not checked. [2021-11-19 14:00:39,738 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:39,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1332632064] [2021-11-19 14:00:39,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1332632064] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:00:39,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [921608739] [2021-11-19 14:00:39,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:39,738 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:00:39,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:00:39,740 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:00:39,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-19 14:00:40,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:40,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 1566 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:00:40,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:41,260 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 3068 trivial. 0 not checked. [2021-11-19 14:00:41,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:42,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 3238 trivial. 0 not checked. [2021-11-19 14:00:42,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [921608739] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:00:42,413 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:00:42,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [18, 18] total 24 [2021-11-19 14:00:42,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805894093] [2021-11-19 14:00:42,415 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:42,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:00:42,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:42,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:00:42,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-11-19 14:00:42,417 INFO L87 Difference]: Start difference. First operand 16072 states and 21384 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 3 states have call successors, (54), 3 states have call predecessors, (54), 3 states have return successors, (51), 3 states have call predecessors, (51), 3 states have call successors, (51) [2021-11-19 14:00:44,491 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:00:45,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:45,811 INFO L93 Difference]: Finished difference Result 37700 states and 50096 transitions. [2021-11-19 14:00:45,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:00:45,811 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 3 states have call successors, (54), 3 states have call predecessors, (54), 3 states have return successors, (51), 3 states have call predecessors, (51), 3 states have call successors, (51) Word has length 470 [2021-11-19 14:00:45,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:45,925 INFO L225 Difference]: With dead ends: 37700 [2021-11-19 14:00:45,926 INFO L226 Difference]: Without dead ends: 21968 [2021-11-19 14:00:45,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1876 GetRequests, 1854 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-11-19 14:00:45,981 INFO L933 BasicCegarLoop]: 1822 mSDtfsCounter, 886 mSDsluCounter, 1272 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 886 SdHoareTripleChecker+Valid, 3094 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:45,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [886 Valid, 3094 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 54 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-11-19 14:00:46,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21968 states. [2021-11-19 14:00:47,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21968 to 21960. [2021-11-19 14:00:47,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21960 states, 16333 states have (on average 1.279617951386763) internal successors, (20900), 16440 states have internal predecessors, (20900), 4066 states have call successors, (4066), 1559 states have call predecessors, (4066), 1559 states have return successors, (4066), 4044 states have call predecessors, (4066), 4066 states have call successors, (4066) [2021-11-19 14:00:47,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21960 states to 21960 states and 29032 transitions. [2021-11-19 14:00:47,139 INFO L78 Accepts]: Start accepts. Automaton has 21960 states and 29032 transitions. Word has length 470 [2021-11-19 14:00:47,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:47,141 INFO L470 AbstractCegarLoop]: Abstraction has 21960 states and 29032 transitions. [2021-11-19 14:00:47,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 3 states have call successors, (54), 3 states have call predecessors, (54), 3 states have return successors, (51), 3 states have call predecessors, (51), 3 states have call successors, (51) [2021-11-19 14:00:47,141 INFO L276 IsEmpty]: Start isEmpty. Operand 21960 states and 29032 transitions. [2021-11-19 14:00:47,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2021-11-19 14:00:47,161 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:47,162 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 24, 24, 24, 24, 24, 24, 10, 10, 10, 4, 4, 4, 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] [2021-11-19 14:00:47,171 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (11)] Ended with exit code 0 [2021-11-19 14:00:47,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:47,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:47,580 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 14:00:47,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:47,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1945328455, now seen corresponding path program 1 times [2021-11-19 14:00:47,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:47,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [295454838] [2021-11-19 14:00:47,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:47,583 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:47,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:47,584 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:47,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 14:00:48,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:48,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 1555 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-19 14:00:48,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:50,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3285 backedges. 558 proven. 3 refuted. 0 times theorem prover too weak. 2724 trivial. 0 not checked. [2021-11-19 14:00:50,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:51,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3285 backedges. 48 proven. 42 refuted. 0 times theorem prover too weak. 3195 trivial. 0 not checked. [2021-11-19 14:00:51,605 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:51,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [295454838] [2021-11-19 14:00:51,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [295454838] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:00:51,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1558852073] [2021-11-19 14:00:51,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:51,607 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:00:51,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:00:51,612 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:00:51,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-19 14:00:52,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:52,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 1555 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:00:52,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:53,320 INFO L134 CoverageAnalysis]: Checked inductivity of 3285 backedges. 201 proven. 0 refuted. 0 times theorem prover too weak. 3084 trivial. 0 not checked. [2021-11-19 14:00:53,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:54,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3285 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 3274 trivial. 0 not checked. [2021-11-19 14:00:54,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1558852073] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:00:54,226 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:00:54,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [18, 18] total 24 [2021-11-19 14:00:54,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443282671] [2021-11-19 14:00:54,227 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:54,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:00:54,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:54,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:00:54,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-11-19 14:00:54,230 INFO L87 Difference]: Start difference. First operand 21960 states and 29032 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 3 states have call successors, (56), 3 states have call predecessors, (56), 3 states have return successors, (53), 3 states have call predecessors, (53), 3 states have call successors, (53) [2021-11-19 14:00:56,320 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:00:57,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:57,597 INFO L93 Difference]: Finished difference Result 53322 states and 70538 transitions. [2021-11-19 14:00:57,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:00:57,597 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 3 states have call successors, (56), 3 states have call predecessors, (56), 3 states have return successors, (53), 3 states have call predecessors, (53), 3 states have call successors, (53) Word has length 473 [2021-11-19 14:00:57,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:57,728 INFO L225 Difference]: With dead ends: 53322 [2021-11-19 14:00:57,728 INFO L226 Difference]: Without dead ends: 31702 [2021-11-19 14:00:57,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1888 GetRequests, 1866 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-11-19 14:00:57,782 INFO L933 BasicCegarLoop]: 1864 mSDtfsCounter, 1128 mSDsluCounter, 1273 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1128 SdHoareTripleChecker+Valid, 3137 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:57,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1128 Valid, 3137 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 54 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-11-19 14:00:57,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31702 states. [2021-11-19 14:00:59,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31702 to 31692. [2021-11-19 14:00:59,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31692 states, 23674 states have (on average 1.2784489313170566) internal successors, (30266), 23823 states have internal predecessors, (30266), 5752 states have call successors, (5752), 2264 states have call predecessors, (5752), 2264 states have return successors, (5752), 5718 states have call predecessors, (5752), 5752 states have call successors, (5752) [2021-11-19 14:00:59,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31692 states to 31692 states and 41770 transitions. [2021-11-19 14:00:59,476 INFO L78 Accepts]: Start accepts. Automaton has 31692 states and 41770 transitions. Word has length 473 [2021-11-19 14:00:59,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:59,477 INFO L470 AbstractCegarLoop]: Abstraction has 31692 states and 41770 transitions. [2021-11-19 14:00:59,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 3 states have call successors, (56), 3 states have call predecessors, (56), 3 states have return successors, (53), 3 states have call predecessors, (53), 3 states have call successors, (53) [2021-11-19 14:00:59,478 INFO L276 IsEmpty]: Start isEmpty. Operand 31692 states and 41770 transitions. [2021-11-19 14:00:59,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2021-11-19 14:00:59,492 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:59,492 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 24, 24, 24, 24, 24, 24, 10, 10, 10, 4, 4, 4, 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] [2021-11-19 14:00:59,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:59,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:59,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:00:59,906 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 14:00:59,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:00,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1636213977, now seen corresponding path program 1 times [2021-11-19 14:01:00,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:01:00,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1377317536] [2021-11-19 14:01:00,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:00,067 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:01:00,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:01:00,072 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:01:00,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 14:01:00,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:01,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 1566 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-19 14:01:01,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:02,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3285 backedges. 558 proven. 3 refuted. 0 times theorem prover too weak. 2724 trivial. 0 not checked. [2021-11-19 14:01:02,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:03,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3285 backedges. 48 proven. 42 refuted. 0 times theorem prover too weak. 3195 trivial. 0 not checked. [2021-11-19 14:01:03,388 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:01:03,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1377317536] [2021-11-19 14:01:03,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1377317536] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:01:03,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1743819814] [2021-11-19 14:01:03,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:03,389 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:01:03,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:01:03,389 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:01:03,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-19 14:01:04,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:04,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 1566 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:01:04,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:04,869 INFO L134 CoverageAnalysis]: Checked inductivity of 3285 backedges. 201 proven. 0 refuted. 0 times theorem prover too weak. 3084 trivial. 0 not checked. [2021-11-19 14:01:04,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:05,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3285 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 3274 trivial. 0 not checked. [2021-11-19 14:01:05,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1743819814] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:05,780 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:01:05,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [18, 18] total 24 [2021-11-19 14:01:05,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307640571] [2021-11-19 14:01:05,781 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:05,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:01:05,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:01:05,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:01:05,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-11-19 14:01:05,783 INFO L87 Difference]: Start difference. First operand 31692 states and 41770 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 3 states have call successors, (58), 3 states have call predecessors, (58), 3 states have return successors, (55), 3 states have call predecessors, (55), 3 states have call successors, (55) [2021-11-19 14:01:07,909 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:01:09,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:09,705 INFO L93 Difference]: Finished difference Result 76622 states and 101053 transitions. [2021-11-19 14:01:09,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:01:09,706 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 3 states have call successors, (58), 3 states have call predecessors, (58), 3 states have return successors, (55), 3 states have call predecessors, (55), 3 states have call successors, (55) Word has length 476 [2021-11-19 14:01:09,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:09,885 INFO L225 Difference]: With dead ends: 76622 [2021-11-19 14:01:09,885 INFO L226 Difference]: Without dead ends: 45270 [2021-11-19 14:01:09,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1900 GetRequests, 1878 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-11-19 14:01:09,957 INFO L933 BasicCegarLoop]: 1937 mSDtfsCounter, 1126 mSDsluCounter, 1271 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1126 SdHoareTripleChecker+Valid, 3208 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:09,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1126 Valid, 3208 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 54 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-11-19 14:01:10,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45270 states. [2021-11-19 14:01:12,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45270 to 45264. [2021-11-19 14:01:12,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45264 states, 33952 states have (on average 1.2770381715362866) internal successors, (43358), 34167 states have internal predecessors, (43358), 8056 states have call successors, (8056), 3254 states have call predecessors, (8056), 3254 states have return successors, (8056), 8004 states have call predecessors, (8056), 8056 states have call successors, (8056) [2021-11-19 14:01:12,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45264 states to 45264 states and 59470 transitions. [2021-11-19 14:01:12,512 INFO L78 Accepts]: Start accepts. Automaton has 45264 states and 59470 transitions. Word has length 476 [2021-11-19 14:01:12,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:12,513 INFO L470 AbstractCegarLoop]: Abstraction has 45264 states and 59470 transitions. [2021-11-19 14:01:12,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 3 states have call successors, (58), 3 states have call predecessors, (58), 3 states have return successors, (55), 3 states have call predecessors, (55), 3 states have call successors, (55) [2021-11-19 14:01:12,513 INFO L276 IsEmpty]: Start isEmpty. Operand 45264 states and 59470 transitions. [2021-11-19 14:01:12,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2021-11-19 14:01:12,539 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:12,539 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 24, 24, 24, 24, 24, 24, 13, 13, 13, 5, 5, 5, 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, 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] [2021-11-19 14:01:12,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 14:01:12,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:01:12,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:01:12,962 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 14:01:12,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:12,962 INFO L85 PathProgramCache]: Analyzing trace with hash -521866241, now seen corresponding path program 1 times [2021-11-19 14:01:12,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:01:12,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1413204959] [2021-11-19 14:01:12,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:12,964 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:01:12,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:01:12,964 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:01:12,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 14:01:13,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:13,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 1704 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-19 14:01:13,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:15,373 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 864 proven. 3 refuted. 0 times theorem prover too weak. 2917 trivial. 0 not checked. [2021-11-19 14:01:15,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:17,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 54 proven. 60 refuted. 0 times theorem prover too weak. 3670 trivial. 0 not checked. [2021-11-19 14:01:17,105 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:01:17,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1413204959] [2021-11-19 14:01:17,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1413204959] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:01:17,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2112422429] [2021-11-19 14:01:17,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:17,106 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:01:17,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:01:17,107 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:01:17,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-19 14:01:17,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:17,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 1704 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:01:17,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:19,039 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 311 proven. 0 refuted. 0 times theorem prover too weak. 3473 trivial. 0 not checked. [2021-11-19 14:01:19,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:20,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 3760 trivial. 0 not checked. [2021-11-19 14:01:20,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2112422429] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:20,086 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:01:20,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [18, 18] total 24 [2021-11-19 14:01:20,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975279919] [2021-11-19 14:01:20,087 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:20,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:01:20,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:01:20,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:01:20,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-11-19 14:01:20,089 INFO L87 Difference]: Start difference. First operand 45264 states and 59470 transitions. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 3 states have call successors, (58), 3 states have call predecessors, (58), 3 states have return successors, (55), 3 states have call predecessors, (55), 3 states have call successors, (55) [2021-11-19 14:01:22,202 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:01:24,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:24,248 INFO L93 Difference]: Finished difference Result 101668 states and 133443 transitions. [2021-11-19 14:01:24,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:01:24,251 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 3 states have call successors, (58), 3 states have call predecessors, (58), 3 states have return successors, (55), 3 states have call predecessors, (55), 3 states have call successors, (55) Word has length 542 [2021-11-19 14:01:24,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:24,590 INFO L225 Difference]: With dead ends: 101668 [2021-11-19 14:01:24,591 INFO L226 Difference]: Without dead ends: 56479 [2021-11-19 14:01:24,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2164 GetRequests, 2142 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-11-19 14:01:24,678 INFO L933 BasicCegarLoop]: 2219 mSDtfsCounter, 879 mSDsluCounter, 1283 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 879 SdHoareTripleChecker+Valid, 3502 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:24,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [879 Valid, 3502 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 49 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-11-19 14:01:24,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56479 states. [2021-11-19 14:01:27,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56479 to 56471. [2021-11-19 14:01:27,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56471 states, 42446 states have (on average 1.2745606181972389) internal successors, (54100), 42706 states have internal predecessors, (54100), 9912 states have call successors, (9912), 4111 states have call predecessors, (9912), 4111 states have return successors, (9912), 9842 states have call predecessors, (9912), 9912 states have call successors, (9912) [2021-11-19 14:01:27,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56471 states to 56471 states and 73924 transitions. [2021-11-19 14:01:27,338 INFO L78 Accepts]: Start accepts. Automaton has 56471 states and 73924 transitions. Word has length 542 [2021-11-19 14:01:27,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:27,339 INFO L470 AbstractCegarLoop]: Abstraction has 56471 states and 73924 transitions. [2021-11-19 14:01:27,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 3 states have call successors, (58), 3 states have call predecessors, (58), 3 states have return successors, (55), 3 states have call predecessors, (55), 3 states have call successors, (55) [2021-11-19 14:01:27,340 INFO L276 IsEmpty]: Start isEmpty. Operand 56471 states and 73924 transitions. [2021-11-19 14:01:27,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2021-11-19 14:01:27,360 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:27,360 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 24, 24, 24, 24, 24, 24, 13, 13, 13, 5, 5, 5, 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, 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] [2021-11-19 14:01:27,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-19 14:01:27,592 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-19 14:01:27,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:01:27,770 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 14:01:27,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:27,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1405375231, now seen corresponding path program 1 times [2021-11-19 14:01:27,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:01:27,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [344955437] [2021-11-19 14:01:27,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:27,772 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:01:27,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:01:27,773 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:01:27,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 14:01:28,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:28,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 1704 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-19 14:01:28,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:30,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 864 proven. 3 refuted. 0 times theorem prover too weak. 2917 trivial. 0 not checked. [2021-11-19 14:01:30,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:32,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 54 proven. 60 refuted. 0 times theorem prover too weak. 3670 trivial. 0 not checked. [2021-11-19 14:01:32,039 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:01:32,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [344955437] [2021-11-19 14:01:32,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [344955437] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:01:32,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1485426511] [2021-11-19 14:01:32,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:32,040 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:01:32,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:01:32,063 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:01:32,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-19 14:01:32,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:32,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 1704 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:01:32,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:33,856 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 311 proven. 0 refuted. 0 times theorem prover too weak. 3473 trivial. 0 not checked. [2021-11-19 14:01:33,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:35,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 3760 trivial. 0 not checked. [2021-11-19 14:01:35,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1485426511] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:35,051 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:01:35,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [18, 18] total 24 [2021-11-19 14:01:35,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18548024] [2021-11-19 14:01:35,052 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:35,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:01:35,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:01:35,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:01:35,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-11-19 14:01:35,054 INFO L87 Difference]: Start difference. First operand 56471 states and 73924 transitions. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 3 states have call successors, (58), 3 states have call predecessors, (58), 3 states have return successors, (55), 3 states have call predecessors, (55), 3 states have call successors, (55) [2021-11-19 14:01:37,127 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:01:39,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:39,610 INFO L93 Difference]: Finished difference Result 124163 states and 162513 transitions. [2021-11-19 14:01:39,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:01:39,611 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 3 states have call successors, (58), 3 states have call predecessors, (58), 3 states have return successors, (55), 3 states have call predecessors, (55), 3 states have call successors, (55) Word has length 542 [2021-11-19 14:01:39,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:39,873 INFO L225 Difference]: With dead ends: 124163 [2021-11-19 14:01:39,873 INFO L226 Difference]: Without dead ends: 68032 [2021-11-19 14:01:40,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2164 GetRequests, 2142 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-11-19 14:01:40,009 INFO L933 BasicCegarLoop]: 2217 mSDtfsCounter, 888 mSDsluCounter, 1274 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 3491 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:40,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [888 Valid, 3491 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 52 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-11-19 14:01:40,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68032 states. [2021-11-19 14:01:42,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68032 to 68024. [2021-11-19 14:01:42,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68024 states, 51230 states have (on average 1.2725161038454031) internal successors, (65191), 51535 states have internal predecessors, (65191), 11805 states have call successors, (11805), 4987 states have call predecessors, (11805), 4987 states have return successors, (11805), 11717 states have call predecessors, (11805), 11805 states have call successors, (11805) [2021-11-19 14:01:43,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68024 states to 68024 states and 88801 transitions. [2021-11-19 14:01:43,158 INFO L78 Accepts]: Start accepts. Automaton has 68024 states and 88801 transitions. Word has length 542 [2021-11-19 14:01:43,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:43,159 INFO L470 AbstractCegarLoop]: Abstraction has 68024 states and 88801 transitions. [2021-11-19 14:01:43,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 3 states have call successors, (58), 3 states have call predecessors, (58), 3 states have return successors, (55), 3 states have call predecessors, (55), 3 states have call successors, (55) [2021-11-19 14:01:43,160 INFO L276 IsEmpty]: Start isEmpty. Operand 68024 states and 88801 transitions. [2021-11-19 14:01:43,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 547 [2021-11-19 14:01:43,188 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:43,188 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 24, 24, 24, 24, 24, 24, 14, 14, 14, 5, 5, 5, 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, 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] [2021-11-19 14:01:43,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 14:01:43,617 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (19)] Forcibly destroying the process [2021-11-19 14:01:43,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:01:43,618 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_kernel_locking_mutex__one_thread_double_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_assert_linux_kernel_locking_mutex__one_thread_locked_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 14:01:43,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:43,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1487788706, now seen corresponding path program 1 times [2021-11-19 14:01:43,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:01:43,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1177084929] [2021-11-19 14:01:43,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:43,620 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:01:43,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:01:43,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-19 14:01:43,622 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:01:43,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 14:01:44,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:44,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 1694 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-19 14:01:44,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:46,070 INFO L134 CoverageAnalysis]: Checked inductivity of 3837 backedges. 880 proven. 3 refuted. 0 times theorem prover too weak. 2954 trivial. 0 not checked. [2021-11-19 14:01:46,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:47,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3837 backedges. 54 proven. 66 refuted. 0 times theorem prover too weak. 3717 trivial. 0 not checked. [2021-11-19 14:01:47,657 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:01:47,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1177084929] [2021-11-19 14:01:47,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1177084929] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:01:47,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [673282965] [2021-11-19 14:01:47,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:47,658 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:01:47,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:01:47,659 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:01:47,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcb0d8a-4e1c-4005-8d19-69c430ceaeff/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-19 14:01:48,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:48,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 1694 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:01:48,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:49,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3837 backedges. 348 proven. 0 refuted. 0 times theorem prover too weak. 3489 trivial. 0 not checked. [2021-11-19 14:01:49,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:50,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3837 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 3812 trivial. 0 not checked. [2021-11-19 14:01:50,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [673282965] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:50,785 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:01:50,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [18, 18] total 24 [2021-11-19 14:01:50,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621752776] [2021-11-19 14:01:50,786 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:50,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:01:50,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:01:50,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:01:50,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-11-19 14:01:50,788 INFO L87 Difference]: Start difference. First operand 68024 states and 88801 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 3 states have call successors, (60), 3 states have call predecessors, (60), 3 states have return successors, (57), 3 states have call predecessors, (57), 3 states have call successors, (57) [2021-11-19 14:01:52,857 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:01:56,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:56,022 INFO L93 Difference]: Finished difference Result 156007 states and 203836 transitions. [2021-11-19 14:01:56,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:01:56,022 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 3 states have call successors, (60), 3 states have call predecessors, (60), 3 states have return successors, (57), 3 states have call predecessors, (57), 3 states have call successors, (57) Word has length 546 [2021-11-19 14:01:56,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:56,287 INFO L225 Difference]: With dead ends: 156007 [2021-11-19 14:01:56,288 INFO L226 Difference]: Without dead ends: 88323 [2021-11-19 14:01:56,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2180 GetRequests, 2158 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-11-19 14:01:56,413 INFO L933 BasicCegarLoop]: 2462 mSDtfsCounter, 1130 mSDsluCounter, 1274 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1130 SdHoareTripleChecker+Valid, 3736 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:56,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1130 Valid, 3736 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 52 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-11-19 14:01:56,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88323 states.