Notes - msv2017/gebf GitHub Wiki
Behind the curtain the algorithm uses integer array to represent complete grammar expression.
By default the maximum length for expression is 10.
For simple grammar it is more than enough. But if it is not, just pass one more parameter to the call like this:
gebf(lang, testFunc, testPoints, testResults, N);
where N is max length of expression
Unfortunately, due to brute-force approach it is not recommended.