Analysis: Dead Variable

i := 0; t3 := 0;

while i <= m do

( j := 0 ;

t2 := t3;

while j <= n do

( t1 := t3 + j ;

ta := Base(a) + t1 ;

Cont(ta):=Cont(Base(b) + t1) + Cont(Base(c) + t1);

j := j + 1;

);

t3 := t3 + (n + 1);

i := i + 1);