[soravux]

Eureqa seems a wonderful software for this specific application. If only I could get 2,500$ for a one-year license...

[Houshalter]

It has a 30 day free trial and you can use it for free if you limit to a few hundred datapoints (not ideal but workable.)

It's not perfect for this application though because it doesn't bitwise operations or use execution time as a fitness function.

[cfn]

There are cheaper ones such as GeneXproTools.