segmentation fault after fgets - c program - c

Question

I'm writing a c program as part of my operating system course task.
I found that I have a bug, after "stripping" my code I found the source of the problem is with the fgets function. The "numbers.txt" file has 3 lines of number pairs, I need to read each pair and do something.
I also need to make sure there is only 1 pair of numbers in each line (not allowed 3 numbers in a line)
so my code works for the first 2 lines, but gets "Segmentation Fault(Core Dump) on the third line.
I thought it was because the file only had 3 lines so I tried adding more lines but still only the first 2 worked.
Here is the code:
void newlineRemover(char *array) {
for (int i = 0; i < strlen(array); i++)
if (array[i] == '\n')
array[i] = '\0';
}
int main(int argc, char **argv) {
char *line = (char*) malloc(100 * sizeof(char));
char *token;
int numbers[2], number, counter = 1;
puts("please enter the numbers file name:");
fgets(line, MAXCHAR, stdin); // read from stdin
newlineRemover(line);
FILE *fp = fopen(line, "r");
if (fp == NULL) {
perror("fopen(): ");
return EXIT_FAILURE;
}
while (fgets(line, 50, fp) != NULL) {
token = strtok(line, " ");
while (token != NULL) {
number = atoi(token);
if (counter != 3 && (number != 0 || strcmp(token, "0") == 0)) {
numbers[counter - 1] = number;
} else {
fprintf(stderr, "‫‪illegal‬‬ ‫‪input‬‬ ‫‪at‬‬ ‫‪line %d",
line_count);
exit(EXIT_FAILURE);
}
counter++;
token = strtok(NULL, " ");
}
counter = 0;
}
fclose(fp);
return EXIT_SUCCESS;
}
The code runs until the end of the second while loop run, then when it checks again the fgets != NULL, I get the error.