ddrescue: safe to stop while "Splitting failed blocks"?

Trying to clone a failing disk with ddrescue

sudo ddrescue -r 3 /path/to/home /destination/ logfile

It's been running for about 10 days! Now it's Splitting failed blocks and hasn't read anything successfully for the past two days.

Is it safe to Ctrl+c ddrescue now? Will the so-far rescued image be usable if I do so?

This is from the ddrescue manual:

IMPORTANT! If you interrupt the rescue and then reboot, any partially copied partitions should be hidden before allowing them to be touched by any operating system that tries to mount and "fix" the partitions it sees.