Program: 134193
Project: 134193
Buggy source:
public void progress(){
  if (!player.isOnline() || player.isDead()) {
    remove();
    return;
  }
  if (target != null) {
    if ((target instanceof Player && !((Player)target).isOnline()) || target.isDead()) {
      remove();
      return;
    }
  }
  if (!player.isSneaking()) {
    isControlling=false;
  }
  if (isBeingWorn && System.currentTimeMillis() > startTime + armorTime) {
    remove();
    return;
  }
  if (isControlling && player.isSneaking()) {
    if (metalclips >= 1) {
      Location oldLocation=target.getLocation();
      Location loc=Methods.getTargetedLocation(player,(int)player.getLocation().distance(oldLocation));
      double distance=loc.distance(oldLocation);
      Vector v=Methods.getDirection(target.getLocation(),player.getLocation());
      if (distance > 2.5)       target.setVelocity(v.normalize().multiply(0.1));
      Methods.breakBreathbendingHold(target);
    }
    if (metalclips >= 2) {
      Location oldLocation=target.getLocation();
      Location loc=Methods.getTargetedLocation(player,(int)player.getLocation().distance(oldLocation));
      double distance=loc.distance(oldLocation);
      Vector v=Methods.getDirection(target.getLocation(),player.getLocation());
      if (distance > 2.5)       target.setVelocity(v.normalize().multiply(0.2));
      Methods.breakBreathbendingHold(target);
    }
    if (metalclips >= 3) {
      Location oldLocation=target.getLocation();
      Location loc=Methods.getTargetedLocation(player,(int)player.getLocation().distance(oldLocation));
      double distance=loc.distance(oldLocation);
      double dx=loc.getX() - oldLocation.getX();
      double dy=loc.getY() - oldLocation.getY();
      double dz=loc.getZ() - oldLocation.getZ();
      Vector v=new Vector(dx,dy,dz);
      if (distance > .5)       target.setVelocity(v.normalize().multiply(.5));
 else       target.setVelocity(new Vector(0,0,0));
      target.setFallDistance(0);
      Methods.breakBreathbendingHold(target);
    }
    if (metalclips == 4) {
      if (System.currentTimeMillis() > time + crushInterval) {
        time=System.currentTimeMillis();
        Methods.damageEntity(player,target,crushDamage);
      }
    }
  }
  for (int i=0; i < trackedIngots.size(); i++) {
    Item ii=trackedIngots.get(i);
    if (ii.getItemStack().getType() == Material.IRON_INGOT) {
      for (      Entity e : Methods.getEntitiesAroundPoint(ii.getLocation(),2)) {
        if (e instanceof LivingEntity && e.getEntityId() != player.getEntityId()) {
          Methods.damageEntity(player,e,0.5);
          if (e instanceof Player || e instanceof Zombie || e instanceof Skeleton) {
            if (target == null)             target=(LivingEntity)e;
            formArmor();
          }
 else {
            ii.getWorld().dropItem(ii.getLocation(),ii.getItemStack());
            remove();
          }
          ii.remove();
        }
      }
    }
  }
  removeDeadIngots();
}

Fixed version (ground truth):
public void progress(){
  if (!player.isOnline() || player.isDead()) {
    remove();
    return;
  }
  if (target != null) {
    if ((target instanceof Player && !((Player)target).isOnline()) || target.isDead()) {
      remove();
      return;
    }
  }
  if (!player.isSneaking()) {
    isControlling=false;
  }
  if (isBeingWorn && System.currentTimeMillis() > startTime + armorTime) {
    remove();
    return;
  }
  if (isControlling && player.isSneaking()) {
    if (metalclips >= 1) {
      Location oldLocation=target.getLocation();
      Location loc=Methods.getTargetedLocation(player,(int)player.getLocation().distance(oldLocation));
      double distance=loc.distance(oldLocation);
      Vector v=Methods.getDirection(target.getLocation(),player.getLocation());
      if (distance > .5)       target.setVelocity(v.normalize().multiply(0.1));
      Methods.breakBreathbendingHold(target);
    }
    if (metalclips >= 2) {
      Location oldLocation=target.getLocation();
      Location loc=Methods.getTargetedLocation(player,(int)player.getLocation().distance(oldLocation));
      double distance=loc.distance(oldLocation);
      Vector v=Methods.getDirection(target.getLocation(),player.getLocation());
      if (distance > .5)       target.setVelocity(v.normalize().multiply(0.2));
      Methods.breakBreathbendingHold(target);
    }
    if (metalclips >= 3) {
      Location oldLocation=target.getLocation();
      Location loc=Methods.getTargetedLocation(player,(int)player.getLocation().distance(oldLocation));
      double distance=loc.distance(oldLocation);
      double dx=loc.getX() - oldLocation.getX();
      double dy=loc.getY() - oldLocation.getY();
      double dz=loc.getZ() - oldLocation.getZ();
      Vector v=new Vector(dx,dy,dz);
      if (distance > .5)       target.setVelocity(v.normalize().multiply(.5));
 else       target.setVelocity(new Vector(0,0,0));
      target.setFallDistance(0);
      Methods.breakBreathbendingHold(target);
    }
    if (metalclips == 4) {
      if (System.currentTimeMillis() > time + crushInterval) {
        time=System.currentTimeMillis();
        Methods.damageEntity(player,target,crushDamage);
      }
    }
  }
  for (int i=0; i < trackedIngots.size(); i++) {
    Item ii=trackedIngots.get(i);
    if (ii.getItemStack().getType() == Material.IRON_INGOT) {
      for (      Entity e : Methods.getEntitiesAroundPoint(ii.getLocation(),2)) {
        if (e instanceof LivingEntity && e.getEntityId() != player.getEntityId()) {
          Methods.damageEntity(player,e,0.5);
          if (e instanceof Player || e instanceof Zombie || e instanceof Skeleton) {
            if (target == null)             target=(LivingEntity)e;
            formArmor();
          }
 else {
            ii.getWorld().dropItem(ii.getLocation(),ii.getItemStack());
            remove();
          }
          ii.remove();
        }
      }
    }
  }
  removeDeadIngots();
}