***Source***
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<<+++++++++++++++.>.+++.------.--------.>+.>.

***Interperted***
Add 10 to A (0->10)
Entering loop 1 (10): (Loop invariant: A->10)
 Add 7 to B
 Add 10 to C
 Add 3 to D
 Add 1 to E
 Subtract 1 from A
Exiting loop 1: A->0 B->70 C->100 D->30 E->10 

Add 2 to B (70->72)
Print B (72)
Add 1 to C (100->101)
Print C (101)
Add 7 to C (101->108)
Print C (108)
Print C (108)
Add 3 to C (108->111)
Print C (111)
Add 2 to D (30->32)
Print D (32)
Add 15 to B (72->87)
Print B (87)
Print C (111)
Add 3 to C (111->114)
Print C (114)
Subtract 6 from C (114->108)
Print C (108)
Subtract 8 from C (108->100)
Print C (100)
Add 1 to D (32->33)
Print D (33)
Print E (10)

***Summary***
Output:
Hello World!

Variables modified in loop 1: 
A B C D E 

Contents of memory:
A->0 B->87 C->100 D->33 E->10