class Ex {
static int g, h, i, j;
static boolean b;
static void m(int a) {
// start complicated computation guaranteed to leave i != 0
i = a*a + 1; //
// end of complicated computataion
//@ assume i != 0l;
if (b) {
g = h/i;
} else {
h = g/i + g/j;
}
}
}