original.name="IntDiv_Valid_5"
======
>>> main.whiley
function f(int x, int y) -> {int nx, int ny}
requires x == (2 * y):
x = x + 2
y = y + 1
assert (2 * y) == x
return {nx: x, ny: y}
public export method test() :
assume f(2, 1) == {nx: 4, ny: 2}
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