A method for executing a computer program involving obtaining a statement of the source code, where the statement comprises a method call, and where the source code is composed in a statically-typed programming language. The method also involves, upon entry into a loop included in the computer program: incrementing an entry counter by one; and, for each iteration of the loop, incrementing an iteration counter by one, incrementing a local counter by one to obtain an incremented value of the local counter, incrementing a summation variable by the incremented value of the local counter, and executing the iteration of the loop.