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function Average(a: int, b: int): int
{
(a + b) / 2
}
ghost method Triple(x: int) returns (r: int)
ensures r == 3 * x
r := Average(2 * x, 4 * x);
method Triple1(x: int) returns (r: int)
var y := 2 * x;
r := x + y;
ghost var a, b := DoubleQuadruple(x);
assert a <= r <= b || b <= r <= a;
ghost method DoubleQuadruple(x: int) returns (a: int, b: int)
ensures a == 2 * x && b == 4 * x
a := 2 * x;
b := 2 * a;
function F(): int {
29
method M() returns (r: int)
ensures r == 29
r := 29;
method Caller() {
var a := F();
var b := M();
assert a == 29;
assert b == 29;
method MyMethod(x: int) returns (y: int)
requires 10 <= x
ensures 25 <= y
var a, b;
a := x + 3;
if x < 20 {
b := 32 - x;
} else {
b := 16;
y := a + b;
