Program: 130671
Project: 130671
Buggy source:
public Block[][][] buildChunk(){
  Block[][][] chunk=new Block[16][256][16];
  for (int x=0; x < 16; x++) {
    for (int y=0; y < 256; y++) {
      for (int z=0; z < 16; z++) {
        if ((y > 0 && y <= 16) || (y > 48 && y <= 64) || (y > 96 && y <= 112)|| (y > 144 && y <= 160))         chunk[x][y][z]=VetheaBlocks.dreamStone;
        if (tree1Count <= 1 && y == 30 + rand.nextInt(5) && rand.nextInt(55) == 0 && x + 5 < 16 && z + 7 < 16 && shouldGenTree1) {
          tree1Count++;
          floatingTree1.generate(chunk,x,y,z);
        }
      }
    }
  }
  return chunk;
}

Fixed version (ground truth):
public Block[][][] buildChunk(){
  Block[][][] chunk=new Block[16][256][16];
  for (int x=0; x < 16; x++) {
    for (int y=0; y < 256; y++) {
      for (int z=0; z < 16; z++) {
        if ((y > 0 && y <= 16) || (y > 48 && y <= 64) || (y > 96 && y <= 112)|| (y > 144 && y <= 160))         chunk[x][y][z]=VetheaBlocks.dreamStone;
        if (tree1Countl1 <= 1 && y == 30 + rand.nextInt(5) && rand.nextInt(155) == 0 && x + 5 < 16 && z + 7 < 16 && shouldGenTree1) {
          tree1Countl1++;
          floatingTree1.generate(chunk,x,y,z);
        }
        if (tree2Countl1 <= 1 && y == 30 + rand.nextInt(5) && rand.nextInt(155) == 0 && x + 3 < 16 && z + 8 < 16 && shouldGenTree2) {
          tree2Countl1++;
          floatingTree2.generate(chunk,x,y,z);
        }
        if (tree3Countl1 <= 1 && y == 30 + rand.nextInt(5) && rand.nextInt(155) == 0 && x + 3 < 16 && z + 3 < 16 && shouldGenTree3) {
          tree3Countl1++;
          floatingTree3.generate(chunk,x,y,z);
        }
        if (tree4Countl1 <= 1 && y == 30 + rand.nextInt(5) && rand.nextInt(155) == 0 && x + 5 < 16 && z + 2 < 16 && shouldGenTree4) {
          tree4Countl1++;
          floatingTree4.generate(chunk,x,y,z);
        }
        if (tree5Countl1 <= 1 && y == 30 + rand.nextInt(5) && rand.nextInt(155) == 0 && x + 4 < 16 && z + 9 < 16 && shouldGenTree5) {
          tree5Countl1++;
          floatingTree5.generate(chunk,x,y,z);
        }
        if (tree6Countl1 <= 1 && y == 30 + rand.nextInt(5) && rand.nextInt(155) == 0 && x + 5 < 16 && z + 2 < 16 && shouldGenTree6) {
          tree6Countl1++;
          floatingTree6.generate(chunk,x,y,z);
        }
        if (tree7Countl1 <= 1 && y == 30 + rand.nextInt(5) && rand.nextInt(155) == 0 && x + 5 < 16 && z + 2 < 16 && shouldGenTree7) {
          tree7Countl1++;
          floatingTree7.generate(chunk,x,y,z);
        }
        if (tree1Countl2 <= 1 && y == 80 + rand.nextInt(5) && rand.nextInt(155) == 0 && x + 5 < 16 && z + 7 < 16 && shouldGenTree1) {
          tree1Countl2++;
          floatingTree1.generate(chunk,x,y,z);
        }
        if (tree2Countl2 <= 1 && y == 80 + rand.nextInt(5) && rand.nextInt(155) == 0 && x + 3 < 16 && z + 8 < 16 && shouldGenTree2) {
          tree2Countl2++;
          floatingTree2.generate(chunk,x,y,z);
        }
        if (tree3Countl2 <= 1 && y == 80 + rand.nextInt(5) && rand.nextInt(155) == 0 && x + 3 < 16 && z + 3 < 16 && shouldGenTree3) {
          tree3Countl2++;
          floatingTree3.generate(chunk,x,y,z);
        }
        if (tree4Countl2 <= 1 && y == 80 + rand.nextInt(5) && rand.nextInt(155) == 0 && x + 5 < 16 && z + 2 < 16 && shouldGenTree4) {
          tree4Countl2++;
          floatingTree4.generate(chunk,x,y,z);
        }
        if (tree5Countl2 <= 1 && y == 80 + rand.nextInt(5) && rand.nextInt(155) == 0 && x + 4 < 16 && z + 9 < 16 && shouldGenTree5) {
          tree5Countl2++;
          floatingTree5.generate(chunk,x,y,z);
        }
        if (tree6Countl2 <= 1 && y == 80 + rand.nextInt(5) && rand.nextInt(155) == 0 && x + 5 < 16 && z + 2 < 16 && shouldGenTree6) {
          tree6Countl2++;
          floatingTree6.generate(chunk,x,y,z);
        }
        if (tree7Countl2 <= 1 && y == 80 + rand.nextInt(5) && rand.nextInt(155) == 0 && x + 5 < 16 && z + 2 < 16 && shouldGenTree7) {
          tree7Countl2++;
          floatingTree7.generate(chunk,x,y,z);
        }
        if (tree1Countl3 <= 1 && y == 128 + rand.nextInt(5) && rand.nextInt(155) == 0 && x + 5 < 16 && z + 7 < 16 && shouldGenTree1) {
          tree1Countl3++;
          floatingTree1.generate(chunk,x,y,z);
        }
        if (tree2Countl3 <= 1 && y == 128 + rand.nextInt(5) && rand.nextInt(155) == 0 && x + 3 < 16 && z + 8 < 16 && shouldGenTree2) {
          tree2Countl3++;
          floatingTree2.generate(chunk,x,y,z);
        }
        if (tree3Countl3 <= 1 && y == 128 + rand.nextInt(5) && rand.nextInt(155) == 0 && x + 3 < 16 && z + 3 < 16 && shouldGenTree3) {
          tree3Countl3++;
          floatingTree3.generate(chunk,x,y,z);
        }
        if (tree4Countl3 <= 1 && y == 128 + rand.nextInt(5) && rand.nextInt(155) == 0 && x + 5 < 16 && z + 2 < 16 && shouldGenTree4) {
          tree4Countl3++;
          floatingTree4.generate(chunk,x,y,z);
        }
        if (tree5Countl3 <= 1 && y == 128 + rand.nextInt(5) && rand.nextInt(155) == 0 && x + 4 < 16 && z + 9 < 16 && shouldGenTree5) {
          tree5Countl3++;
          floatingTree5.generate(chunk,x,y,z);
        }
        if (tree6Countl3 <= 1 && y == 128 + rand.nextInt(5) && rand.nextInt(155) == 0 && x + 5 < 16 && z + 2 < 16 && shouldGenTree6) {
          tree6Countl3++;
          floatingTree6.generate(chunk,x,y,z);
        }
        if (tree7Countl3 <= 1 && y == 128 + rand.nextInt(5) && rand.nextInt(155) == 0 && x + 5 < 16 && z + 2 < 16 && shouldGenTree7) {
          tree7Countl3++;
          floatingTree7.generate(chunk,x,y,z);
        }
        if (tree1Countl4 <= 1 && y == 176 + rand.nextInt(5) && rand.nextInt(155) == 0 && x + 5 < 16 && z + 7 < 16 && shouldGenTree1) {
          tree1Countl4++;
          floatingTree1.generate(chunk,x,y,z);
        }
        if (tree2Countl4 <= 1 && y == 176 + rand.nextInt(5) && rand.nextInt(155) == 0 && x + 3 < 16 && z + 8 < 16 && shouldGenTree2) {
          tree2Countl4++;
          floatingTree2.generate(chunk,x,y,z);
        }
        if (tree3Countl4 <= 1 && y == 176 + rand.nextInt(5) && rand.nextInt(155) == 0 && x + 3 < 16 && z + 3 < 16 && shouldGenTree3) {
          tree3Countl4++;
          floatingTree3.generate(chunk,x,y,z);
        }
        if (tree4Countl4 <= 1 && y == 176 + rand.nextInt(5) && rand.nextInt(155) == 0 && x + 5 < 16 && z + 2 < 16 && shouldGenTree4) {
          tree4Countl4++;
          floatingTree4.generate(chunk,x,y,z);
        }
        if (tree5Countl4 <= 1 && y == 176 + rand.nextInt(5) && rand.nextInt(155) == 0 && x + 4 < 16 && z + 9 < 16 && shouldGenTree5) {
          tree5Countl4++;
          floatingTree5.generate(chunk,x,y,z);
        }
        if (tree6Countl4 <= 1 && y == 176 + rand.nextInt(5) && rand.nextInt(155) == 0 && x + 5 < 16 && z + 2 < 16 && shouldGenTree6) {
          tree6Countl4++;
          floatingTree6.generate(chunk,x,y,z);
        }
        if (tree7Countl4 <= 1 && y == 176 + rand.nextInt(5) && rand.nextInt(155) == 0 && x + 5 < 16 && z + 2 < 16 && shouldGenTree7) {
          tree7Countl4++;
          floatingTree7.generate(chunk,x,y,z);
        }
      }
    }
  }
  return chunk;
}