./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-ext3-properties/dll_nullified-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27d4afc-e759-478b-b379-075365ac731a/bin/ukojak-verify-ImItNfHLgk/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27d4afc-e759-478b-b379-075365ac731a/bin/ukojak-verify-ImItNfHLgk/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27d4afc-e759-478b-b379-075365ac731a/bin/ukojak-verify-ImItNfHLgk/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27d4afc-e759-478b-b379-075365ac731a/bin/ukojak-verify-ImItNfHLgk/config/KojakReach.xml -i ../../sv-benchmarks/c/list-ext3-properties/dll_nullified-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27d4afc-e759-478b-b379-075365ac731a/bin/ukojak-verify-ImItNfHLgk/config/svcomp-Reach-32bit-Kojak_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27d4afc-e759-478b-b379-075365ac731a/bin/ukojak-verify-ImItNfHLgk --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Kojak --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3b4637ab5710a1ca22a981e8047278048fbbf856825d3649b2cb9d48de11d175 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 23:26:10,282 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 23:26:10,376 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27d4afc-e759-478b-b379-075365ac731a/bin/ukojak-verify-ImItNfHLgk/config/svcomp-Reach-32bit-Kojak_Default.epf [2024-11-08 23:26:10,381 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 23:26:10,381 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck.Interpolating solver [2024-11-08 23:26:10,420 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 23:26:10,421 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 23:26:10,421 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ALWAYS [2024-11-08 23:26:10,422 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 23:26:10,422 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 23:26:10,424 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 23:26:10,424 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-08 23:26:10,425 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 23:26:10,425 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 23:26:10,428 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 23:26:10,428 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 23:26:10,429 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-08 23:26:10,429 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 23:26:10,429 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-08 23:26:10,430 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 23:26:10,430 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 23:26:10,434 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-08 23:26:10,434 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 23:26:10,435 INFO L151 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2024-11-08 23:26:10,435 INFO L153 SettingsManager]: * Timeout in seconds=1000000 [2024-11-08 23:26:10,435 INFO L153 SettingsManager]: * Theory for external solver=ALL [2024-11-08 23:26:10,435 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 23:26:10,436 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2024-11-08 23:26:10,436 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 23:26:10,436 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 23:26:10,437 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-08 23:26:10,437 INFO L153 SettingsManager]: * Trace refinement strategy=PENGUIN [2024-11-08 23:26:10,437 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 23:26:10,437 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_c27d4afc-e759-478b-b379-075365ac731a/bin/ukojak-verify-ImItNfHLgk/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27d4afc-e759-478b-b379-075365ac731a/bin/ukojak-verify-ImItNfHLgk Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Kojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3b4637ab5710a1ca22a981e8047278048fbbf856825d3649b2cb9d48de11d175 [2024-11-08 23:26:10,776 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 23:26:10,808 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 23:26:10,811 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 23:26:10,813 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 23:26:10,814 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 23:26:10,815 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27d4afc-e759-478b-b379-075365ac731a/bin/ukojak-verify-ImItNfHLgk/../../sv-benchmarks/c/list-ext3-properties/dll_nullified-2.i Unable to find full path for "g++" [2024-11-08 23:26:12,956 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 23:26:13,230 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 23:26:13,230 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27d4afc-e759-478b-b379-075365ac731a/sv-benchmarks/c/list-ext3-properties/dll_nullified-2.i [2024-11-08 23:26:13,253 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27d4afc-e759-478b-b379-075365ac731a/bin/ukojak-verify-ImItNfHLgk/data/7b5af5956/f5d6f809c52e4f7bbcffe9b2271952d8/FLAGbc58cb6d7 [2024-11-08 23:26:13,526 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27d4afc-e759-478b-b379-075365ac731a/bin/ukojak-verify-ImItNfHLgk/data/7b5af5956/f5d6f809c52e4f7bbcffe9b2271952d8 [2024-11-08 23:26:13,529 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 23:26:13,532 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 23:26:13,533 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 23:26:13,536 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 23:26:13,542 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 23:26:13,543 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 11:26:13" (1/1) ... [2024-11-08 23:26:13,546 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b66052c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 11:26:13, skipping insertion in model container [2024-11-08 23:26:13,549 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 11:26:13" (1/1) ... [2024-11-08 23:26:13,616 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 23:26:14,052 WARN L250 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_c27d4afc-e759-478b-b379-075365ac731a/sv-benchmarks/c/list-ext3-properties/dll_nullified-2.i[23974,23987] [2024-11-08 23:26:14,057 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 23:26:14,072 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 23:26:14,141 WARN L250 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_c27d4afc-e759-478b-b379-075365ac731a/sv-benchmarks/c/list-ext3-properties/dll_nullified-2.i[23974,23987] [2024-11-08 23:26:14,145 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 23:26:14,186 INFO L204 MainTranslator]: Completed translation [2024-11-08 23:26:14,186 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 11:26:14 WrapperNode [2024-11-08 23:26:14,187 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 23:26:14,188 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 23:26:14,188 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 23:26:14,188 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 23:26:14,197 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 11:26:14" (1/1) ... [2024-11-08 23:26:14,218 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 11:26:14" (1/1) ... [2024-11-08 23:26:14,243 INFO L138 Inliner]: procedures = 122, calls = 25, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 106 [2024-11-08 23:26:14,244 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 23:26:14,245 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 23:26:14,245 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 23:26:14,245 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 23:26:14,254 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 11:26:14" (1/1) ... [2024-11-08 23:26:14,254 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 11:26:14" (1/1) ... [2024-11-08 23:26:14,257 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 11:26:14" (1/1) ... [2024-11-08 23:26:14,257 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 11:26:14" (1/1) ... [2024-11-08 23:26:14,265 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 11:26:14" (1/1) ... [2024-11-08 23:26:14,268 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 11:26:14" (1/1) ... [2024-11-08 23:26:14,270 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 11:26:14" (1/1) ... [2024-11-08 23:26:14,271 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 11:26:14" (1/1) ... [2024-11-08 23:26:14,273 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 23:26:14,274 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 23:26:14,274 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 23:26:14,275 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 23:26:14,276 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 11:26:14" (1/1) ... [2024-11-08 23:26:14,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2024-11-08 23:26:14,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27d4afc-e759-478b-b379-075365ac731a/bin/ukojak-verify-ImItNfHLgk/z3 [2024-11-08 23:26:14,318 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27d4afc-e759-478b-b379-075365ac731a/bin/ukojak-verify-ImItNfHLgk/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (exit command is (exit), workingDir is null) [2024-11-08 23:26:14,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c27d4afc-e759-478b-b379-075365ac731a/bin/ukojak-verify-ImItNfHLgk/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (1)] Waiting until timeout for monitored process [2024-11-08 23:26:14,358 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-08 23:26:14,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-08 23:26:14,359 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-08 23:26:14,359 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 23:26:14,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2024-11-08 23:26:14,360 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2024-11-08 23:26:14,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-08 23:26:14,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-08 23:26:14,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 23:26:14,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 23:26:14,496 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 23:26:14,500 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 23:26:14,727 INFO L? ?]: Removed 31 outVars from TransFormulas that were not future-live. [2024-11-08 23:26:14,727 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 23:26:14,843 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 23:26:14,844 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-08 23:26:14,844 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 11:26:14 BoogieIcfgContainer [2024-11-08 23:26:14,845 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 23:26:14,846 INFO L112 PluginConnector]: ------------------------CodeCheck---------------------------- [2024-11-08 23:26:14,846 INFO L270 PluginConnector]: Initializing CodeCheck... [2024-11-08 23:26:14,862 INFO L274 PluginConnector]: CodeCheck initialized [2024-11-08 23:26:14,863 INFO L184 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 11:26:14" (1/1) ... [2024-11-08 23:26:14,874 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 23:26:14,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-11-08 23:26:14,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 17 states and 25 transitions. [2024-11-08 23:26:14,963 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 25 transitions. [2024-11-08 23:26:14,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-08 23:26:14,966 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-11-08 23:26:14,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 23:26:15,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 23:26:15,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 23:26:15,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-11-08 23:26:15,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 18 states and 25 transitions. [2024-11-08 23:26:15,325 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2024-11-08 23:26:15,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-08 23:26:15,326 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-11-08 23:26:15,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 23:26:15,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 23:26:15,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 23:26:15,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-11-08 23:26:15,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 19 states and 26 transitions. [2024-11-08 23:26:15,440 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 26 transitions. [2024-11-08 23:26:15,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-08 23:26:15,443 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-11-08 23:26:15,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 23:26:15,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 23:26:15,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 23:26:15,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-11-08 23:26:15,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 21 states and 29 transitions. [2024-11-08 23:26:15,855 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 29 transitions. [2024-11-08 23:26:15,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-08 23:26:15,855 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-11-08 23:26:15,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 23:26:15,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 23:26:15,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 23:26:15,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-11-08 23:26:15,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 21 states and 28 transitions. [2024-11-08 23:26:15,981 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2024-11-08 23:26:15,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-08 23:26:15,981 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-11-08 23:26:15,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 23:26:16,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 23:26:16,136 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 23:26:16,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-11-08 23:26:16,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 24 states and 32 transitions. [2024-11-08 23:26:16,387 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2024-11-08 23:26:16,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-08 23:26:16,388 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-11-08 23:26:16,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 23:26:16,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 23:26:16,649 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 23:26:16,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-11-08 23:26:16,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 27 states and 36 transitions. [2024-11-08 23:26:16,922 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2024-11-08 23:26:16,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-08 23:26:16,923 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-11-08 23:26:16,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 23:26:17,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 23:26:17,250 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 23:26:17,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-11-08 23:26:17,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 30 states and 39 transitions. [2024-11-08 23:26:17,597 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2024-11-08 23:26:17,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-08 23:26:17,598 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-11-08 23:26:17,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 23:26:17,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 23:26:19,730 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-08 23:26:21,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-11-08 23:26:21,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 33 states and 43 transitions. [2024-11-08 23:26:21,344 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2024-11-08 23:26:21,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-08 23:26:21,344 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-11-08 23:26:21,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 23:26:21,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 23:26:22,474 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-08 23:26:23,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-11-08 23:26:23,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 35 states and 46 transitions. [2024-11-08 23:26:23,925 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2024-11-08 23:26:23,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-08 23:26:23,925 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-11-08 23:26:23,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 23:26:24,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 23:26:26,879 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 23 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 23:26:31,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-11-08 23:26:31,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 38 states and 53 transitions. [2024-11-08 23:26:31,692 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 53 transitions. [2024-11-08 23:26:31,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-08 23:26:31,695 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-11-08 23:26:31,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 23:26:31,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 23:26:33,707 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 23:26:38,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-11-08 23:26:38,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 41 states and 59 transitions. [2024-11-08 23:26:38,609 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 59 transitions. [2024-11-08 23:26:38,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-08 23:26:38,610 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-11-08 23:26:38,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 23:26:38,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 23:26:43,606 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 23:26:54,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-11-08 23:26:54,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 44 states and 61 transitions. [2024-11-08 23:26:54,062 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 61 transitions. [2024-11-08 23:26:54,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-08 23:26:54,063 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-11-08 23:26:54,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 23:26:54,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 23:26:58,326 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 23:27:10,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-11-08 23:27:10,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 47 states and 66 transitions. [2024-11-08 23:27:10,484 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 66 transitions. [2024-11-08 23:27:10,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-08 23:27:10,484 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-11-08 23:27:10,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 23:27:10,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 23:27:19,877 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 20 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 23:27:41,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-11-08 23:27:41,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 50 states and 70 transitions. [2024-11-08 23:27:41,381 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 70 transitions. [2024-11-08 23:27:41,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-08 23:27:41,381 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-11-08 23:27:41,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 23:27:41,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 23:27:48,597 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 23:28:09,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-11-08 23:28:09,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 53 states and 75 transitions. [2024-11-08 23:28:09,501 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 75 transitions. [2024-11-08 23:28:09,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-08 23:28:09,502 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-11-08 23:28:09,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 23:28:09,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 23:28:22,550 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 23:28:58,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-11-08 23:28:58,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 59 states and 84 transitions. [2024-11-08 23:28:58,201 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 84 transitions. [2024-11-08 23:28:58,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-08 23:28:58,202 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-11-08 23:28:58,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 23:28:58,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 23:29:13,127 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 23:29:35,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-11-08 23:29:35,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 62 states and 90 transitions. [2024-11-08 23:29:35,656 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 90 transitions. [2024-11-08 23:29:35,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-08 23:29:35,657 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-11-08 23:29:35,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 23:29:35,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 23:29:49,568 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 18 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 23:30:34,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-11-08 23:30:34,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 79 states and 111 transitions. [2024-11-08 23:30:34,209 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 111 transitions. [2024-11-08 23:30:34,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-08 23:30:34,209 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-11-08 23:30:34,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 23:30:34,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 23:30:39,720 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 18 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 23:31:07,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-11-08 23:31:07,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 90 states and 128 transitions. [2024-11-08 23:31:07,837 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 128 transitions. [2024-11-08 23:31:07,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-08 23:31:07,838 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-11-08 23:31:07,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 23:31:07,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 23:31:28,511 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 19 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 23:33:01,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-11-08 23:33:01,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 107 states and 159 transitions. [2024-11-08 23:33:01,259 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 159 transitions. [2024-11-08 23:33:01,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-08 23:33:01,259 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-11-08 23:33:01,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 23:33:01,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 23:33:01,991 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-08 23:33:06,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-11-08 23:33:06,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 47 states and 55 transitions. [2024-11-08 23:33:06,341 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2024-11-08 23:33:06,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-08 23:33:06,341 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-11-08 23:33:06,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 23:33:06,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 23:33:33,835 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 20 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 23:35:35,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-11-08 23:35:35,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 54 states and 66 transitions. [2024-11-08 23:35:35,748 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2024-11-08 23:35:35,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-08 23:35:35,748 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-11-08 23:35:35,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 23:35:35,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 23:36:05,696 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 23:38:27,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-11-08 23:38:27,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 57 states and 73 transitions. [2024-11-08 23:38:27,354 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 73 transitions. [2024-11-08 23:38:27,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-08 23:38:27,355 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-11-08 23:38:27,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 23:38:27,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 23:39:07,282 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 8 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.