exc_bad_acess error when trying to run my code

I am having trouble with my code. The code is able to open both of the text files, however, when I try to run it I get a EXC_BAD_ACCESS error.

The objective of this code is to run the assembly line algorithm for an assembly with 3 lines (located in the text files).

I'm coding in xcode, not sure if that makes a difference.

Any help or suggestions would be great, thanks :)

#include <stdio.h>
#include <iostream>
#include <fstream>
#include <string>
#include <ctime>

using namespace std;

#define NUM_STATIONS 20
#define MAX_STATIONS 20

int bookk = 0;

//Returns the min value between x and y and z
int min(int x, int y, int z){
    bookk++;
    return x < y ? (x < z ? x : z) : (y < z ? y : z);
}

int minLines1(int a, int b, int c){
    return a < b ? (a < c ? a : c) : (b < c ? b : c);
}

int minLines2(int d, int f, int g){
    return d < f ? (d < g ? d : g) : (f < g ? f : g);
}

int minLines3(int h, int k, int l){
    return h < k ? (h < l ? h : l) : (k < l ? k : l);
}

//Function that returns the best possible path
int assemblyLine(int *e, int *x, int a[][MAX_STATIONS], int t[][MAX_STATIONS]){
    int times1[NUM_STATIONS];
    int times2[NUM_STATIONS];
    int times3[NUM_STATIONS];
    int i;

//Initial time for line 1
times1[0] = e[0] + a[0][0];
bookk++;
//Initial time for line 2
times2[0] = e[1] + a[1][0];
bookk++;
//Initial time for line 3
times3[0] = e[2] + a[2][0];
bookk++;

for (i = 1; i < sizeof(times1)/4; ++i){
    cout << "Station: " << i << " - Line: " << endl;

    times1[i] = min(times1[i-1] + a[0][i], times2[i-1] + t[1][i-1] + a[0][i], times3[i-1] + t[2][i-1] + a[0][i]);
    bookk++;
    //cout << "Time1[" << i << "] = " << times1[i] << endl;
    times2[i] = min(times2[i-1] + a[1][i], times1[i-1] + t[0][i-1] + a[1][i], times3[i-1] + t[2][i-1] + a[1][i]);
    bookk++;
    //cout << "Time2[" << i << "] = " << times2[i] << endl;
    times3[i] = min(times3[i-1] + a[2][i], times1[i-1] + t[0][i-1] + a[2][i], times2[i-1] + t[1][i-1] + a[2][i]);
    bookk++;

    int lineUsed = minLines1(times1[i], times2[i], times3[i]);
    if(lineUsed == 1){
        cout << "Station: " << i << " - Line: " << minLines1(times1[i-1] + a[0][i], times2[i-1] + t[1][i-1] + a[0][i], times3[i-1] + t[2][i-1] + a[0][i]) << endl;
    }
    if(lineUsed == 2){
        cout << "Station: " << i << " - Line: " << minLines2(times2[i-1] + a[1][i], times1[i-1] + t[0][i-1] + a[1][i], times3[i-1] + t[2][i-1] + a[1][i]) << endl;
    }
    if(lineUsed == 3){
        cout << "Station: " << i << " - Line: " << minLines3(times3[i-1] + a[2][i], times2[i-1] + t[0][i-1] + a[2][i], times2[i-1] + t[1][i-1] + a[2][i]) << endl;
    }
}

return min(times1[NUM_STATIONS-1] + x[0], times2[NUM_STATIONS-1] + x[1], times3[NUM_STATIONS-1] + x[2]);
}


int main(){

ifstream entryExitProcessFile("ProcessTimes.txt", ios::in);

ifstream transitions_file("ThreeLaneTransitions.txt", ios::in);

string line;
int linecount = 0;

//Entry and exit vector
int e[3];
int x[3];

//Process vector
int a[3][MAX_STATIONS];

//Transition vector
int t[3][MAX_STATIONS];

if (entryExitProcessFile.is_open()){

    cout << "File open!" << endl;

    //First line -> entry vector e
    entryExitProcessFile >> e[0];
    entryExitProcessFile >> e[1];
    entryExitProcessFile >> e[2];
    //cout << "Vector e[0]:" << e[0] << endl;
    //cout << "Vector e[1]:" << e[1] << endl;

    while(getline(entryExitProcessFile, line)){

        //Second Line -> exit vector x
        if (linecount == 0){
            entryExitProcessFile >> x[0];
            entryExitProcessFile >> x[1];
            entryExitProcessFile >> x[2];
            //cout << "Vector x[0]:" << x[0] << endl;
            //cout << "Vector x[1]:" << x[1] << endl;
            //cout << "Vector x[2]:" << x[2] << endl;
            linecount++;
        }

        else{
            //Other lines -> process vector a
            //First line assignment
            entryExitProcessFile >> a[0][linecount-1];
            //cout << "Vector a[0][" << linecount-1 << "]:" << a[0][linecount-1] << endl;

            //Second line assignment
            entryExitProcessFile >> a[1][linecount-1];
            //cout << "Vector a[1][" << linecount-1 << "]:" << a[1][linecount-1] << endl;

            //Third line assignment
            entryExitProcessFile >> a[2][linecount-1];
            //cout << "Vector a[1][" << linecount-1 << "]:" << a[2][linecount-1] << endl;

            linecount++;
        }
    }

    entryExitProcessFile.close();
}

else cout << "Unable to open file." << endl;

if(transitions_file.is_open()){
    cout << "File open!" << endl;
    linecount = 0;
    //First line assignment
    transitions_file >> t[0][0];
    transitions_file >> t[1][0];
    transitions_file >> t[2][0];
    //cout << "Vector t[0][0]:" << t[0][0] << endl;
    //cout << "Vector t[1][0]:" << t[1][0] << endl;
    linecount++;

    while(getline(transitions_file, line)){

        //Other lines assignments
        transitions_file >> t[0][linecount];
        //cout << "Vector t[0][" << linecount << "]:" << t[0][linecount] << endl;
        transitions_file >> t[1][linecount];
        //cout << "Vector t[1][" << linecount << "]:" << t[1][linecount] << endl;
        transitions_file >> t[2][linecount];
        //cout << "Vector t[1][" << linecount << "]:" << t[2][linecount] << endl;
        linecount++;
    }   

    transitions_file.close();
}

else cout << "Unable to open file." << endl;

cout << "Best possible path cost: " << assemblyLine(e, x, a, t) << endl;
cout << "Number of bookkeepings couted: " << bookk << endl;

return 0;
}