linux3% valgrind ./test2.out
==12425== Memcheck, a memory error detector
==12425== Copyright (C) 2002-2012, and GNU GPL'd, by Julian Seward et al.
==12425== Using Valgrind-3.8.1 and LibVEX; rerun with -h for copyright info
==12425== Command: ./a.out
==12425== 
Dump out graph (size = 5):
[ 0]: 1 4 3 
[ 1]: 2 0 4 
[ 2]: 4 1 
[ 3]: 0 4 
[ 4]: 2 0 1 3 
Dump out graph (size = 5):
[ 0]: 1 4 3 
[ 1]: 2 0 4 
[ 2]: 4 1 
[ 3]: 0 4 
[ 4]: 2 0 1 3 
Dump out graph (size = 5):
[ 0]: 1 4 3 
[ 1]: 2 0 4 
[ 2]: 4 1 
[ 3]: 0 4 
[ 4]: 2 0 1 3 
Dump out graph (size = 3):
[ 0]: 2 1 
[ 1]: 2 0 
[ 2]: 1 0 
Dump out graph (size = 5):
[ 0]: 1 4 3 
[ 1]: 2 0 4 
[ 2]: 4 1 
[ 3]: 0 4 
[ 4]: 2 0 1 3 
==12425== 
==12425== HEAP SUMMARY:
==12425==     in use at exit: 0 bytes in 0 blocks
==12425==   total heap usage: 54 allocs, 54 frees, 944 bytes allocated
==12425== 
==12425== All heap blocks were freed -- no leaks are possible
==12425== 
==12425== For counts of detected and suppressed errors, rerun with: -v
==12425== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 6 from 6)
linux3%