// RUN: %dafny /compile:0  /autoTriggers:1 "%s" > "%t"
// RUN: %diff "%s.expect" "%t"

function f1(d:int):map<int,int>
function f2(y:int, d:int):int

method M(m:map<int,int>, d:int, x2:int)
{
  assert forall d :: f1(d) == (map x | x in m ::  f2(x, d));
}