[thu2111]

I would bet large sums of money that this code is producing the correct output according to the model/parameter specifications.

I'll take that money off you then.

The code has various memory safety bugs in it and originally had a typo in a random number generator constant. Amongst other problems.

There's really no reason to believe it produces correct outputs, in fact, we know it didn't and probably still doesn't given how it was written.