According to an aspect of an embodiment, operations may include generating a first abstract syntax tree with respect to a first iteration of first source code of a first software program and generating a second abstract syntax tree with respect to a second iteration of the first source code. The operations may also include identifying a first sub-tree of the first abstract syntax tree and identifying a plurality of second sub-trees of the second abstract syntax tree. In addition the operations may include generating a first textual representation of the first sub-tree and generating a plurality of second textual representations with respect to the second sub-trees. Moreover, the operations may include modifying the second abstract syntax tree based on the second sub-trees and obtaining a third iteration of the first source code by regenerating the first source code based on the modified second abstract syntax tree.