Unity subdividing icosohedron script problem

So I wrote this script to subdivide an icosohedron, but when I try to execute it unity crashes. Here is the code

 using UnityEngine;
 using System.Collections;
 using System;
 using System.Collections.Generic;
 
 [RequireComponent(typeof(MeshRenderer)), RequireComponent(typeof(MeshFilter))]
 
 public class Icosohedron : MonoBehaviour {
 
     public int recursionLevel;
     private float t = (1 + Mathf.Sqrt(5)) / 2;
     private MeshFilter mf;
     // Use this for initialization
     void Start () {
         #region
         List<Vector3> verticies = new List<Vector3>();
         
         Vector3 aa = new Vector3(-1,  t,  0);
         Vector3 ab = new Vector3(1, t, 0);
         Vector3 ac = new Vector3(-1, -t, 0);
         Vector3 ad = new Vector3(1, -t, 0);
 
         Vector3 ae = new Vector3(0, -1, t);
         Vector3 af = new Vector3(0, 1, t);
         Vector3 ag = new Vector3(0, -1, -t);
         Vector3 ah = new Vector3(0, 1, -t);
 
         Vector3 ai = new Vector3(t, 0, -1);
         Vector3 aj = new Vector3(t, 0, 1);
         Vector3 ak = new Vector3(-t, 0, -1);
         Vector3 al = new Vector3(-t, 0, 1);
 
         verticies.Add(aa);
         verticies.Add(ab);
         verticies.Add(ac);
         verticies.Add(ad);
         verticies.Add(ae);
         verticies.Add(af);
         verticies.Add(ag);
         verticies.Add(ah);
         verticies.Add(ai);
         verticies.Add(aj);
         verticies.Add(ak);
         verticies.Add(al);
 
         List<int> triangles = new List<int>();
 
         triangles.AddRange(new int[] {
              0, 11, 5,
              0, 5, 1,
              0, 1, 7,
              0, 7, 10,
              0, 10, 11,
 
              1, 5, 9,
              5, 11, 4,
              11, 10, 2,
              10, 7, 6,
              7, 1, 8,
 
              3, 9, 4,
              3, 4, 2,
              3, 2, 6,
              3, 6, 8,
              3, 8, 9,
 
              4, 9, 5,
              2, 4, 11,
              6, 2, 10,
              8, 6, 7,
              9, 8, 1
         });
         #endregion
         mf = GetComponent<MeshFilter>();
         mf.mesh = CreateIcosohedron(verticies, triangles);
         print(mf.mesh.triangles.Length);
         print(mf.mesh.vertices.Length);
         for (int tri = 0; tri < triangles.Count/3; tri+=3)
         {
             Vector3 tempV1 = new Vector3();
             Vector3 tempV2 = new Vector3();
             Vector3 tempV3 = new Vector3();
             Vector3 NewVS12 = new Vector3();
             Vector3 NewVS23 = new Vector3();
             Vector3 NewVS13 = new Vector3();
             int[] TrianglesArray = triangles.ToArray();
             Vector3[] VertsArray = verticies.ToArray();
             tempV1 = VertsArray[tri];
             tempV2 = VertsArray[tri + 1];
             tempV3 = VertsArray[tri + 2];
             triangles.Remove(0);
             triangles.Remove(1);
             triangles.Remove(2);
             NewVS12 = Vector3.Slerp(tempV1, tempV2, 0.5f);
             NewVS23 = Vector3.Slerp(tempV2, tempV3, 0.5f);
             NewVS13 = Vector3.Slerp(tempV1, tempV3, 0.5f);
 
             verticies.Add(NewVS12);
             verticies.Add(NewVS23);
             verticies.Add(NewVS13);
 
             int VertNum1 = verticies.Count-2; //12
             int VertNum2 = verticies.Count - 1; //23
             int VertNum3 = verticies.Count; //13
 
             triangles.Add(VertNum1);
             triangles.Add(VertNum2); //Middle triangle
             triangles.Add(VertNum3);
 
             triangles.Add(VertNum1);
             triangles.Add(tri);     // adds 12
             triangles.Add(tri + 1);
 
             triangles.Add(VertNum2);
             triangles.Add(tri + 2); // adds 23
             triangles.Add(tri + 1);
 
             triangles.Add(VertNum3);
             triangles.Add(tri); // adds 13
             triangles.Add(tri + 2);
         }
         /*  Cycle through each triangle /
             turn lists into arrays /
             store old verts /
             Delete the triangle /
             make new verticies /
             Slerp verticies /
             Add Verts to list /
             Get what number the verticies are /
             Make 4 triangles ?
         */
         mf.mesh = CreateIcosohedron(verticies, triangles);
     }
 
     Mesh CreateIcosohedron(List<Vector3> Verts, List<int> triangles)
     {
         Mesh m;
         m = new Mesh();
         float t = (1 + Mathf.Sqrt(5)) / 2;
         Vector3[] array = new Vector3[99999];
         array = Verts.ToArray();
         m.vertices = array;
         int[] arrayt = new int[99999];
         arrayt = triangles.ToArray();
         m.triangles = arrayt;
         return m;
     }
 }