There is a massive difference in outright transformation of something you created yourself vs a collage of snippets + some sauce based on stuff you did not write yourself. If all you did to use your AI was to train it exclusively on your own work product create during your lifetime I would have absolutely no problem with it, in fact in that case I would love to see copyright extended to the author.

But in the present case the authorship is just removed by shredding the library and then piecing back together the sentences. The fact that under some circumstances AIs will happily reproduce code that was in the training data is proof positive they are to some degree lossy compressors. The more generic something is ("for (i=0;i<MAXVAL;i++) {") the lower the claim for copyright infringement. But higher level constructs past a couple of lines that are unique in the training set that are reproduced in the output modulo some name changes and/or language changes should count as automatic transformation (and hence infringing or creating a derivative work).