--- layout: fc_discuss_archives title: Message 4 from Frama-C-discuss on July 2017 ---
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[Frama-c-discuss] ACSL by Example and automatic provers



Hello Yannick,

I don’t think we had a bias towards Alt-Ergo because for a long time we have used CVC4 and Z3 in our
verification pipeline before Alt-Ergo.
I suspect, however, that the Alt-Ergo development follows WP and Why3 more closely than the other provers.
And I think, Alt-Ergo has really become better over the last years.

Also, CVC4 hasn’t had a new stable release for a long time (CVC4-1.5 is just a week out and we haven’t checked it yet).

> In our experience, the usefulness of a prover is that it proves something that other provers don't.
> With that angle, most provers are very useful.

I completely agree.

Jens


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