Program: 133975
Project: 133975
Buggy source:
public void progress(){
  progressCounter++;
  if (state == State.LIFTED && REMOVE_TIMER > 0 && System.currentTimeMillis() - time > REMOVE_TIMER) {
    remove();
    return;
  }
  if (state == State.START || state == State.FLYING || state == State.GRABBED) {
    if (player.isDead() || !player.isOnline()) {
      remove();
      return;
    }
  }
 else   if (state == State.START) {
    String ability=GeneralMethods.getBoundAbility(player);
    if (ability == null || !ability.equalsIgnoreCase("String_Node_Str") || bplayer.isOnCooldown("String_Node_Str")) {
      remove();
      return;
    }
  }
 else   if (state == State.START || state == State.FLYING || state == State.GRABBED) {
    if (!GeneralMethods.canBend(player.getName(),"String_Node_Str")) {
      remove();
      return;
    }
  }
  if (state == State.START && progressCounter > 1) {
    if (!player.isSneaking()) {
      if (System.currentTimeMillis() - time > chargeTime) {
        origin=EarthMethods.getEarthSourceBlock(player,selectRange,true,EarthMethods.canSandbend(player),EarthMethods.canMetalbend(player));
        if (origin == null) {
          remove();
          return;
        }
        loc=origin.getLocation();
        state=State.LIFTING;
      }
 else {
        remove();
        return;
      }
    }
 else     if (System.currentTimeMillis() - time > chargeTime) {
      Location tempLoc=player.getEyeLocation().add(player.getEyeLocation().getDirection().normalize().multiply(1.2));
      tempLoc.add(0,0.3,0);
      ParticleEffect.SMOKE.display(tempLoc,0.3F,0.1F,0.3F,0,4);
    }
  }
 else   if (state == State.LIFTING) {
    if (System.currentTimeMillis() - delay >= LIFT_ANIMATION_COOLDOWN) {
      delay=System.currentTimeMillis();
      animateLift();
    }
  }
 else   if (state == State.GRABBED) {
    if (player.isSneaking()) {
      revert();
      Location oldLoc=loc.clone();
      loc=player.getEyeLocation().add(player.getEyeLocation().getDirection().normalize().multiply(grabbedRange));
      for (      Block block : getBlocks())       if (block.getType() != Material.AIR && !EarthMethods.isTransparentToEarthbending(player,block)) {
        loc=oldLoc;
        break;
      }
      WaterMethods.removeWaterSpouts(loc,2,player);
      AirMethods.removeAirSpouts(loc,2,player);
      draw();
      return;
    }
 else {
      state=State.LIFTED;
      return;
    }
  }
 else   if (state == State.SHOT) {
    if (System.currentTimeMillis() - delay >= SHOOTING_ANIMATION_COOLDOWN) {
      bplayer.addCooldown("String_Node_Str",cooldown);
      delay=System.currentTimeMillis();
      if (GeneralMethods.isRegionProtectedFromBuild(player,"String_Node_Str",loc)) {
        remove();
        return;
      }
      revert();
      loc.add(GeneralMethods.getDirection(loc,destination).normalize().multiply(1));
      if (loc.distanceSquared(destination) < 4) {
        remove();
        return;
      }
      int badBlocksFound=0;
      for (      Block block : getBlocks())       if (block.getType() != Material.AIR && (!EarthMethods.isTransparentToEarthbending(player,block) || block.getType() == Material.WATER || block.getType() == Material.STATIONARY_WATER))       badBlocksFound++;
      if (badBlocksFound > MAX_BLOCKS_TO_PASS_THROUGH) {
        remove();
        return;
      }
      WaterMethods.removeWaterSpouts(loc,2,player);
      AirMethods.removeAirSpouts(loc,2,player);
      shootingCollisionDetection();
      draw();
      smashToSmashCollisionDetection();
    }
    return;
  }
 else   if (state == State.FLYING) {
    if (!player.isSneaking()) {
      remove();
      return;
    }
 else     if (System.currentTimeMillis() - delay >= FLYING_ANIMATION_COOLDOWN) {
      delay=System.currentTimeMillis();
      if (GeneralMethods.isRegionProtectedFromBuild(player,"String_Node_Str",loc)) {
        remove();
        return;
      }
      revert();
      destination=player.getEyeLocation().clone().add(player.getEyeLocation().getDirection().normalize().multiply(shootRange));
      Vector direction=GeneralMethods.getDirection(loc,destination).normalize();
      List<Entity> entities=GeneralMethods.getEntitiesAroundPoint(loc.clone().add(0,2,0),FLIGHT_DETECTION_RADIUS);
      if (entities.size() == 0) {
        remove();
        return;
      }
      for (      Entity entity : entities)       entity.setVelocity(direction.clone().multiply(flySpeed));
      if (direction.getY() < -0.35)       loc=player.getLocation().clone().add(0,-3.2,0);
 else       if (direction.getY() > 0.35)       loc=player.getLocation().clone().add(0,-1.7,0);
 else       loc=player.getLocation().clone().add(0,-2.2,0);
      draw();
    }
    if (System.currentTimeMillis() - flightStart > flightRemove) {
      remove();
      return;
    }
  }
}

Fixed version (ground truth):
public void progress(){
  progressCounter++;
  if (state == State.LIFTED && REMOVE_TIMER > 0 && System.currentTimeMillis() - time > REMOVE_TIMER) {
    remove();
    return;
  }
  if (state == State.START || state == State.FLYING || state == State.GRABBED) {
    if (player.isDead() || !player.isOnline()) {
      remove();
      return;
    }
  }
 else   if (state == State.START) {
    String ability=GeneralMethods.getBoundAbility(player);
    if (ability == null || !ability.equalsIgnoreCase("String_Node_Str") || bplayer.isOnCooldown("String_Node_Str")) {
      remove();
      return;
    }
  }
 else   if (state == State.START || state == State.FLYING || state == State.GRABBED) {
    if (!GeneralMethods.canBend(player.getName(),"String_Node_Str")) {
      remove();
      return;
    }
  }
  if (state == State.START && progressCounter > 1) {
    if (!player.isSneaking()) {
      if (System.currentTimeMillis() - time > chargeTime) {
        origin=EarthMethods.getEarthSourceBlock(player,selectRange,true,EarthMethods.canSandbend(player),EarthMethods.canMetalbend(player));
        if (origin == null) {
          remove();
          return;
        }
        loc=origin.getLocation();
        state=State.LIFTING;
      }
 else {
        remove();
        return;
      }
    }
 else     if (System.currentTimeMillis() - time > chargeTime) {
      Location tempLoc=player.getEyeLocation().add(player.getEyeLocation().getDirection().normalize().multiply(1.2));
      tempLoc.add(0,0.3,0);
      ParticleEffect.SMOKE.display(tempLoc,0.3F,0.1F,0.3F,0,4);
    }
    if (bplayer.isOnCooldown("String_Node_Str")) {
      return;
    }
  }
 else   if (state == State.LIFTING) {
    if (System.currentTimeMillis() - delay >= LIFT_ANIMATION_COOLDOWN) {
      delay=System.currentTimeMillis();
      animateLift();
      bplayer.addCooldown("String_Node_Str",cooldown);
    }
  }
 else   if (state == State.GRABBED) {
    if (player.isSneaking()) {
      revert();
      Location oldLoc=loc.clone();
      loc=player.getEyeLocation().add(player.getEyeLocation().getDirection().normalize().multiply(grabbedRange));
      for (      Block block : getBlocks())       if (block.getType() != Material.AIR && !EarthMethods.isTransparentToEarthbending(player,block)) {
        loc=oldLoc;
        break;
      }
      WaterMethods.removeWaterSpouts(loc,2,player);
      AirMethods.removeAirSpouts(loc,2,player);
      draw();
      return;
    }
 else {
      state=State.LIFTED;
      return;
    }
  }
 else   if (state == State.SHOT) {
    if (System.currentTimeMillis() - delay >= SHOOTING_ANIMATION_COOLDOWN) {
      delay=System.currentTimeMillis();
      if (GeneralMethods.isRegionProtectedFromBuild(player,"String_Node_Str",loc)) {
        remove();
        return;
      }
      revert();
      loc.add(GeneralMethods.getDirection(loc,destination).normalize().multiply(1));
      if (loc.distanceSquared(destination) < 4) {
        remove();
        return;
      }
      int badBlocksFound=0;
      for (      Block block : getBlocks())       if (block.getType() != Material.AIR && (!EarthMethods.isTransparentToEarthbending(player,block) || block.getType() == Material.WATER || block.getType() == Material.STATIONARY_WATER))       badBlocksFound++;
      if (badBlocksFound > MAX_BLOCKS_TO_PASS_THROUGH) {
        remove();
        return;
      }
      WaterMethods.removeWaterSpouts(loc,2,player);
      AirMethods.removeAirSpouts(loc,2,player);
      shootingCollisionDetection();
      draw();
      smashToSmashCollisionDetection();
    }
    return;
  }
 else   if (state == State.FLYING) {
    if (!player.isSneaking()) {
      remove();
      return;
    }
 else     if (System.currentTimeMillis() - delay >= FLYING_ANIMATION_COOLDOWN) {
      delay=System.currentTimeMillis();
      if (GeneralMethods.isRegionProtectedFromBuild(player,"String_Node_Str",loc)) {
        remove();
        return;
      }
      revert();
      destination=player.getEyeLocation().clone().add(player.getEyeLocation().getDirection().normalize().multiply(shootRange));
      Vector direction=GeneralMethods.getDirection(loc,destination).normalize();
      List<Entity> entities=GeneralMethods.getEntitiesAroundPoint(loc.clone().add(0,2,0),FLIGHT_DETECTION_RADIUS);
      if (entities.size() == 0) {
        remove();
        return;
      }
      for (      Entity entity : entities)       entity.setVelocity(direction.clone().multiply(flySpeed));
      if (direction.getY() < -0.35)       loc=player.getLocation().clone().add(0,-3.2,0);
 else       if (direction.getY() > 0.35)       loc=player.getLocation().clone().add(0,-1.7,0);
 else       loc=player.getLocation().clone().add(0,-2.2,0);
      draw();
    }
    if (System.currentTimeMillis() - flightStart > flightRemove) {
      remove();
      return;
    }
  }
}