Reinitializing an Array is creating a segfault? - c

Question

I am running breadth first search and bellman ford algorithms on large sets of graph data in the format (u, v, weight) from an input file.
I initialize in the breadth first search, that all vertex's should be marked 0 for unvisited.
Later in the program, since I am calling BFS after every time I add an edge, rather than at the end of the program all together (it's part of a research project on bellman ford and BFS even though it doesn't quite make sense) I reinitialize the vertex array to unvisited.
However, I am getting a segmentation fault when I run larger sets it seems when I reinitialize the vertex array. I make the assumption about larger sets because I have a few smaller sets of test data going from 8 vertices, to 10, then at 100 and larger it fails.
Here is how I initialize at the very beginning of the program:
for(i=0;i<numberVertices;i++)
{
vertexArray[i].v = i+1;
vertexArray[i].adj = NULL;
vertexArray[i].marked = 0;
if(i==0)
{
vertexArray[i].weight = 0;
}
else{
vertexArray[i].weight = 10000;
}
}
And here is how I reinitialize at the end of a while loop set to break when it reaches the end of the file directly after BFS finishes:
BFS(q, u)
for(i=0;i<numberVertices;i++)
{
vertexArray[i].marked = 0;
}
Like I said it seems to work for smaller data sets, but I do not understand why when I reinitialize it seems to seg fault.
Please let me know your thoughts and suggestions!
Valgrind Output On An Example Case:
==6634== Memcheck, a memory error detector
==6634== Copyright (C) 2002-2010, and GNU GPL'd, by Julian Seward et al.
==6634== Using Valgrind-3.6.0 and LibVEX; rerun with -h for copyright info
==6634== Command: ./a.out 100S.txt
==6634==
==6634== Conditional jump or move depends on uninitialised value(s)
==6634== at 0x400C13: checkonqueue (bfs.c:160)
==6634== by 0x400B7F: BFS (bfs.c:142)
==6634== by 0x40094A: main (bfs.c:103)
==6634==
==6634== Invalid write of size 4
==6634== at 0x40096E: main (bfs.c:107)
==6634== Address 0x4d00000041 is not stack'd, malloc'd or (recently) free'd
==6634==
==6634==
==6634== Process terminating with default action of signal 11 (SIGSEGV)
==6634== Access not within mapped region at address 0x4D00000041
==6634== at 0x40096E: main (bfs.c:107)
==6634== If you believe this happened as a result of a stack
==6634== overflow in your program's main thread (unlikely but
==6634== possible), you can try to increase the size of the
==6634== main thread stack using the --main-stacksize= flag.
==6634== The main thread stack size used in this run was 10485760.
==6634==
==6634== HEAP SUMMARY:
==6634== in use at exit: 3,448 bytes in 181 blocks
==6634== total heap usage: 181 allocs, 0 frees, 3,448 bytes allocated
==6634==
==6634== LEAK SUMMARY:
==6634== definitely lost: 0 bytes in 0 blocks
==6634== indirectly lost: 0 bytes in 0 blocks
==6634== possibly lost: 0 bytes in 0 blocks
==6634== still reachable: 3,448 bytes in 181 blocks
==6634== suppressed: 0 bytes in 0 blocks
==6634== Reachable blocks (those to which a pointer was found) are not shown.
==6634== To see them, rerun with: --leak-check=full --show-reachable=yes
==6634==
==6634== For counts of detected and suppressed errors, rerun with: -v
==6634== Use --track-origins=yes to see where uninitialised values come from
==6634== ERROR SUMMARY: 16120 errors from 2 contexts (suppressed: 6 from 6)
Segmentation fault (core dumped)
check on queue function:
int checkonqueue(int * q, int value)
{
int i = 0;
for(i=0;i < max;i++)
{
if(q[i] == value)
{
return 1;
}
}
return 0;
}
line 160 is the line of the if condition