It looks like a problem with your MP3 file "a000001.mp3", which is the first MP3 (as renamed by icarus).
Can you try probing its properties? That is, what is the output of:
Code:
> python -m aeneas.tools.read_audio PATH_TO_YOUR.mp3
and
Code:
> python -m aeneas.tools.extract_mfcc PATH_TO_YOUR.mp3 mfcc.out
?