Vienna took no time to fail a puzzle.

1

To quote Vienna bot
“[BOT MESSAGE] ViennaRNA failed to solve this puzzle after 5 trials (00:00:00.00).”

Can somebody clarify this?

2

Oh, it’s the puzzle “(RNA-R) Repetition 1”

3

Aaaand Vienna’s stalled again. It’s stuck at Jee’s puzzle ‘Little Star’ on page four. I think it’s because that puzzle was already solved. Maybe Vienna thinks it’s at the top of the stack now?

4

Hi paramodic,

although ViennaRNA runs generally in random nature, it recognizes when it meets a dead end in problem solving returns “failure.” It turns out that some structures lead ViennaRNA to the deadend very quickly, and make it announce “failure” in a matter of milliseconds which makes the display say it took 00:00:00:00.

5

Aha, very enlightening. What, pray tell, is the criteria for a ‘dead end’, and how does it work?