Program: 156885
Project: 156885
Buggy source:
@Override public Template getTemplate(Box box,World world){
  Template result=new Template(box.sizeX(),box.sizeY(),box.sizeZ());
  int xMin=0;
  int yMin=0;
  int zMin=0;
  int xMax=box.sizeX() - 1;
  int yMax=box.sizeY() - 1;
  int zMax=box.sizeZ() - 1;
  int xFix=(xMax - xMin) % 2;
  int zFix=(zMax - zMin) % 2;
  int xCenter=(xMax + xMin) / 2 + (xMax + xMin < 0 && xFix == 1 ? -1 : 0);
  int zCenter=(zMax + zMin) / 2 + (zMax + zMin < 0 && zFix == 1 ? -1 : 0);
  int xRadius=(xMax - xMin) / 2;
  int zRadius=(zMax - zMin) / 2;
  if (xRadius == 0 || zRadius == 0) {
    fill(xMin,yMin,zMin,xMax,yMax,zMax,result);
  }
  int dx=xRadius, dz=0;
  int xChange=zRadius * zRadius * (1 - 2 * xRadius);
  int zChange=xRadius * xRadius;
  int ellipseError=0;
  int twoASquare=2 * xRadius * xRadius;
  int twoBSquare=2 * zRadius * zRadius;
  int stoppingX=twoBSquare * xRadius;
  int stoppingZ=0;
  while (stoppingX >= stoppingZ) {
    fillFourColumns(xCenter,zCenter,dx,dz,xFix,zFix,yMin,yMax,result);
    ++dz;
    stoppingZ+=twoASquare;
    ellipseError+=zChange;
    zChange+=twoASquare;
    if (2 * ellipseError + xChange > 0) {
      --dx;
      stoppingX-=twoBSquare;
      ellipseError+=xChange;
      xChange+=twoBSquare;
    }
  }
  dx=0;
  dz=zRadius;
  xChange=zRadius * zRadius;
  zChange=xRadius * xRadius * (1 - 2 * zRadius);
  ellipseError=0;
  stoppingX=0;
  stoppingZ=twoASquare * zRadius;
  while (stoppingX <= stoppingZ) {
    fillFourColumns(xCenter,zCenter,dx,dz,xFix,zFix,yMin,yMax,result);
    ++dx;
    stoppingX+=twoBSquare;
    ellipseError+=xChange;
    xChange+=twoBSquare;
    if (2 * ellipseError + zChange > 0) {
      --dz;
      stoppingZ-=twoASquare;
      ellipseError+=zChange;
      zChange+=twoASquare;
    }
  }
  return result;
}

Fixed version (ground truth):
@Override public Template getTemplate(Box box,World world){
  Template result=new Template(box.sizeX(),box.sizeY(),box.sizeZ());
  int xMin=0;
  int yMin=0;
  int zMin=0;
  int xMax=box.sizeX() - 1;
  int yMax=box.sizeY() - 1;
  int zMax=box.sizeZ() - 1;
  int xFix=(xMax - xMin) % 2;
  int zFix=(zMax - zMin) % 2;
  int xCenter=(xMax + xMin) / 2 + (xMax + xMin < 0 && xFix == 1 ? -1 : 0);
  int zCenter=(zMax + zMin) / 2 + (zMax + zMin < 0 && zFix == 1 ? -1 : 0);
  int xRadius=(xMax - xMin) / 2;
  int zRadius=(zMax - zMin) / 2;
  if (xRadius == 0 || zRadius == 0) {
    fill(xMin,yMin,zMin,xMax,yMax,zMax,result);
  }
  int dx=xRadius, dz=0;
  int xChange=zRadius * zRadius * (1 - 2 * xRadius);
  int zChange=xRadius * xRadius;
  int ellipseError=0;
  int twoASquare=2 * xRadius * xRadius;
  int twoBSquare=2 * zRadius * zRadius;
  int stoppingX=twoBSquare * xRadius;
  int stoppingZ=0;
  if (twoASquare > 0) {
    while (stoppingX >= stoppingZ) {
      fillFourColumns(xCenter,zCenter,dx,dz,xFix,zFix,yMin,yMax,result);
      ++dz;
      stoppingZ+=twoASquare;
      ellipseError+=zChange;
      zChange+=twoASquare;
      if (2 * ellipseError + xChange > 0) {
        --dx;
        stoppingX-=twoBSquare;
        ellipseError+=xChange;
        xChange+=twoBSquare;
      }
    }
  }
  dx=0;
  dz=zRadius;
  xChange=zRadius * zRadius;
  zChange=xRadius * xRadius * (1 - 2 * zRadius);
  ellipseError=0;
  stoppingX=0;
  stoppingZ=twoASquare * zRadius;
  if (twoBSquare > 0) {
    while (stoppingX <= stoppingZ) {
      fillFourColumns(xCenter,zCenter,dx,dz,xFix,zFix,yMin,yMax,result);
      ++dx;
      stoppingX+=twoBSquare;
      ellipseError+=xChange;
      xChange+=twoBSquare;
      if (2 * ellipseError + zChange > 0) {
        --dz;
        stoppingZ-=twoASquare;
        ellipseError+=zChange;
        zChange+=twoASquare;
      }
    }
  }
  return result;
}