program 2:

1.  	read(n)
2.	i := 1;
3.	s := 0;
4.	while (i <= n) do
5.	    if (i mod 2) = 0 then
6.		x := 17
	    else
7.		x := 18
8.	    s := s + x
9.	    i := i + 1
	endWhile
10.	write(s);



i.   d:   U
---------------------
1.   n:
2.   i:
3.   s:
4.   p4:   i,n
5.   p5:   i,p4, t
6.   x:    p5, t
7.   x:    p5, f
8.   s:    s,x,p4, t
9.   i:    i, p4, t
10.  o10   s



execution history:
<1,2,3,4,5,7,8,9,4,5,6,8,9,4,10>

program 1:

1.   read (a)
2.   x = 1
3.   b = x + a
4.   a = a + 1
5.   if (b > 0) then
6.      if (a > 1) then
7.         x = 2
8.   write (x)



















Action	 d	 U		    DynSlice(d)			LD(d)
--------|-------|-----------|-----------------------------------------------|
1.1	|	|	    |					|	    |
--------|-------|-----------|-----------------------------------------------|
2.2	|	|	    |					|	    |
--------|-------|-----------|-----------------------------------------------|
3.3	|	|	    |					|	    |
--------|-------|-----------|-----------------------------------------------|
4.4	|	|	    |					|	    |
--------|-------|-----------|-----------------------------------------------|
5.5	|	|	    |					|	    |
--------|-------|-----------|-----------------------------------------------|
7.6	|	|	    |					|	    |
--------|-------|-----------|-----------------------------------------------|
8.7	|	|	    |					|	    |
--------|-------|-----------|-----------------------------------------------|
9.8	|	|	    |					|	    |
--------|-------|-----------|-----------------------------------------------|
4.9	|	|	    |					|	    |
--------|-------|-----------|-----------------------------------------------|
5.10	|	|	    |					|	    |
--------|-------|-----------|-----------------------------------------------|
6.11	|	|	    |					|	    |
--------|-------|-----------|-----------------------------------------------|
8.12	|	|	    |					|	    |
--------|-------|-----------|-----------------------------------------------|
9.13	|	|	    |					|	    |
--------|-------|-----------|-----------------------------------------------|
4.14	|	|	    |					|	    |
--------|-------|-----------|-----------------------------------------------|
10.15	|	|	    |					|	    |
--------|-------|-----------|-----------------------------------------------|