[det]cov_load_data(+File, 
+Options)Reload coverage data from File. Options:
- load(true)
 - If specified and the file in which a clauses is expected to exist, load 
the file using load_files/2 
with the same options as used to initially load the file.
 
- silent(+Boolean)
 - When 
true, do not emit messages on not loaded source files. 
Data is assumed to be reliable if the Nth-clause of a predicate is 
loaded from the same file at the same line number and has the same size. 
Unreliable data is ignored, silently if silent(true) is 
used.