def run_fuzzing(dataset_name,
model,
x_train,
y_train,
x_test,
y_test,
model_layer,
folder_to_store,
order_numbers=10):
for order_number in range(0, order_numbers):
file_path = '{}nc_index_{}.npy'.format(folder_to_store, order_number)
# only perform fuzzing if the file does not exist
if not os.path.exists(file_path):
nc_index = {}
nc_number = 0
lower_bound = 3000 * order_number
upper_bound = 3000 * (order_number + 1)
if lower_bound > len(x_train): lower_bound = len(x_train)
if upper_bound > len(x_train): upper_bound = len(x_train)
for i in range(lower_bound, upper_bound):
new_image = mutate(x_train[i], dataset_name)
if i == 5000 * order_number + 1000 or i == 5000 * order_number + 3000:
print(
"-------------------------------------THIS IS {}-------------------------------------"
.format(i))
if softmax(model.predict(np.expand_dims(
new_image, axis=0))).argmax(axis=-1) != softmax(
model.predict(np.expand_dims(
x_train[i], axis=0))).argmax(axis=-1):
nc_symbol = compare_nc(model, x_train, y_train, x_test,
y_test, new_image, x_train[i],
model_layer)
if nc_symbol == True:
nc_index[i] = new_image
nc_number += 1
print(nc_number)
np.save(file_path, nc_index)
nc_number = 0
for i in range(3000 * order_number, 3000 * (order_number + 1)):
new_image = mutate(x_train[i], dataset)
if i == 5000 * order_number + 1000 or i == 5000 * order_number + 3000:
print(
"-------------------------------------THIS IS {}-------------------------------------"
.format(i))
if softmax(model.predict(np.expand_dims(
new_image, axis=0))).argmax(axis=-1) != softmax(
model.predict(
np.expand_dims(x_train[i],
axis=0))).argmax(axis=-1):
nc_symbol = compare_nc(model, x_train, y_train, x_test,
y_test, new_image, x_train[i],
model_layer)
if nc_symbol == True:
nc_index[i] = new_image
nc_number += 1
print(nc_number)
### save data
folder_to_store = 'fuzzing/{}/{}/'.format(dataset, model_name)
os.makedirs(folder_to_store, exist_ok=True)
np.save(
folder_to_store + '/nc_index_{}.npy'.format(order_number),
nc_index)
for i in tqdm(range(lower_bound, upper_bound, step),
desc="Total progress:"):
left_idx = i
right_idx = min(i + step, upper_bound)
for index, (pred_new, pred_old) in enumerate(
zip(
softmax(
model.predict(
np.array(new_images[left_idx:right_idx]))).
argmax(axis=-1),
softmax(model.predict(
x_test[left_idx:right_idx])).argmax(axis=-1))):
nc_symbol = compare_nc(model, x_train, y_train, x_test,
y_test, new_images[i + index],
x_test[i + index], model_layer)
if nc_symbol == True:
nc_index[i + index] = new_images[i + index]
nc_number += 1
print(
"Log: new image can cover more neurons: {}".format(nc_number))
np.save(nc_index_path, nc_index)
for order_number in range(2):
index = np.load(os.path.join(
store_path, 'nc_index_test_{}.npy'.format(order_number)),
allow_pickle=True).item()
for y, x in index.items():
x_test[y] = x
def cycle(T: int):
# Step 1. Load the current model M_i
current_model_path = "{}{}/{}/{}/{}.h5".format(THIS_MODEL_DIR,
dataset_name, model_name,
is_improve, str(0))
# else:
# current_model_path = "{}{}/{}/{}/{}.h5".format(THIS_MODEL_DIR, dataset_name, model_name, is_improve, str(T-1))
current_model = load_model(current_model_path)
# Step 2. According to the current M_i and dataset, generate examples T_i
## Load the current dataset we have
x_train, y_train, x_test, y_test = load_data(dataset_name)
if not os.path.exists(
os.path.join('new_test/{}/{}'.format(dataset_name, model_name),
'x_test_new.npy')):
print("Generate test set")
new_images = []
for i in tqdm(range(len(x_test)), desc="transformation ......"):
new_images.append(mutate(x_test[i]))
nc_index = {}
nc_number = 0
for i in tqdm(range(0, len(x_test), 500), desc="Total progress:"):
for index, (pred_new, pred_old) in enumerate(
zip(
softmax(model.predict(np.array(
new_images[i:i + 500]))).argmax(axis=-1),
softmax(model.predict(x_test[i:i +
500])).argmax(axis=-1))):
nc_symbol = compare_nc(model, x_train, y_train, x_test, y_test,
new_images[i + index],
x_test[i + index], model_layer)
if nc_symbol == True:
nc_index[i + index] = new_images[i + index]
nc_number += 1
print("Log: new image can cover more neurons: {}".format(nc_number))
store_path = 'new_test/{}/{}'.format(dataset_name, model_name)
os.makedirs(store_path, exist_ok=True)
for y, x in nc_index.items():
x_test[y] = x
np.save(os.path.join(store_path, 'x_test_new.npy'), x_test)
data_folder = 'fuzzing/{}/{}/{}'.format(dataset_name, model_name,
is_improve)
os.makedirs(data_folder, exist_ok=True)
if not T == 0:
if not os.path.exists(os.path.join(data_folder, "new_images.npy")):
print("Log: Start do transformation in images")
new_images = []
for i in tqdm(range(len(x_train))):
new_images.append(mutate(x_train[i]))
np.save(os.path.join(data_folder, "new_images.npy"), new_images)
else:
print("Log: Load mutantions.")
new_images = np.load(os.path.join(data_folder, "new_images.npy"))
for i in range(1, T):
index = np.load('fuzzing/{}/{}/{}/nc_index_{}.npy'.format(
dataset_name, model_name, is_improve, i),
allow_pickle=True).item()
for y, x in index.items():
x_train = np.concatenate((x_train, np.expand_dims(x, axis=0)),
axis=0)
y_train = np.concatenate(
(y_train, np.expand_dims(y_train[y], axis=0)), axis=0)
if not os.path.exists(
os.path.join(data_folder, 'nc_index_{}.npy'.format(T))):
## Generate new examples
nc_index = {}
nc_number = 0
for i in tqdm(range(5000 * (T - 1), 5000 * (T), 500),
desc="Total progress:"):
for index, (pred_new, pred_old) in enumerate(
zip(
softmax(
current_model.predict(
np.array(new_images[i:i + 500]))).argmax(
axis=-1),
softmax(current_model.predict(
x_train[i:i + 500])).argmax(axis=-1))):
# find an adversarial example
if pred_new != pred_old:
nc_symbol = compare_nc(current_model, x_train, y_train,
x_test, y_test,
new_images[i + index],
x_train[i + index], model_layer)
if nc_symbol and improve_coverage:
# new image can cover more neurons, and we want such improvements
nc_index[i + index] = new_images[i + index]
nc_number += 1
if (not improve_coverage) and (not nc_symbol):
# new image CANNOT cover more neurons, and we want examples cannot improve coverage
nc_index[i + index] = new_images[i + index]
nc_number += 1
print("Log: new image can/cannot cover more neurons: {}".format(
nc_number))
np.save(os.path.join(data_folder, 'nc_index_{}.npy'.format(T)),
nc_index)
# Step 3. Retrain M_i against T_i, to obtain M_{i+1}
## Augment the newly generate examples into the training data
index = np.load(os.path.join(data_folder, 'nc_index_{}.npy'.format(T)),
allow_pickle=True).item()
for y, x in index.items():
x_train = np.concatenate((x_train, np.expand_dims(x, axis=0)),
axis=0)
y_train = np.concatenate(
(y_train, np.expand_dims(y_train[y], axis=0)), axis=0)
# Step 4. Evaluate the current model
## Evaluate coverage
print(x_train.shape)
print("\nEvaluate coverage ......")
evaluate_coverage(current_model, l, T, x_train, y_train, x_test, y_test)
## Retrain the model
if not T == 0:
retrained_model = retrain(current_model,
x_train,
y_train,
x_test,
y_test,
batch_size=128,
epochs=5)
new_model_path = "{}{}/{}/{}/{}.h5".format(THIS_MODEL_DIR,
dataset_name, model_name,
is_improve, str(T))
retrained_model.save(new_model_path)
## Evaluate robustness
print("\nEvaluate robustness ......")
store_path = 'new_test/{}/{}'.format(dataset_name, model_name)
x_test_new = np.load(os.path.join(store_path, 'x_test_new.npy'),
allow_pickle=True)
evaluate_robustness(T, current_model, x_test, y_test, x_test_new)
print("Done\n")
def cycle(T: int):
assert T > 0
# Step 1. Load the current model M_i
current_model_path = "{}{}/{}/{}/{}.h5".format(THIS_MODEL_DIR,
dataset_name, model_name,
is_improve, str(T - 1))
current_model = load_model(current_model_path)
# Step 2. According to the current M_i and dataset, generate examples T_i
## Load the current dataset we have
x_train, y_train, x_test, y_test = load_data(dataset_name)
for i in range(T - 1):
index = np.load('fuzzing/nc_index_{}.npy'.format(i),
allow_pickle=True).item()
for y, x in index.items():
x_train = np.concatenate((x_train, np.expand_dims(x, axis=0)),
axis=0)
y_train = np.concatenate(
(y_train, np.expand_dims(y_train[y], axis=0)), axis=0)
## Generate new examples
nc_index = {}
nc_number = 0
for i in range(5000 * (T - 1), 5000 * (T)):
new_image = mutate(x_train[i])
if i % 100 == 0:
print('.', end='')
break
if softmax(current_model.predict(np.expand_dims(
new_image, axis=0))).argmax(axis=-1) != softmax(
current_model.predict(np.expand_dims(
x_train[i], axis=0))).argmax(axis=-1):
# find an adversarial example
nc_symbol = compare_nc(current_model, x_train, y_train, x_test,
y_test, new_image, x_train[i], model_layer)
if nc_symbol and improve_coverage:
# new image can cover more neurons, and we want such improvements
nc_index[i] = new_image
nc_number += 1
if (not improve_coverage) and (not nc_symbol):
# new image CANNOT cover more neurons, and we want examples cannot improve coverage
nc_index[i] = new_image
nc_number += 1
print(nc_number)
data_folder = 'fuzzing/{}/{}/{}'.format(dataset_name, model_name,
is_improve)
os.makedirs(data_folder, exist_ok=True)
np.save(os.path.join(data_folder, 'nc_index_{}.npy'.format(T)), nc_index)
# Step 3. Retrain M_i against T_i, to obtain M_{i+1}
## Augment the newly generate examples into the training data
index = np.load(os.path.join(data_folder, 'nc_index_{}.npy'.format(T)),
allow_pickle=True).item()
for y, x in index.items():
x_train = np.concatenate((x_train, np.expand_dims(x, axis=0)), axis=0)
y_train = np.concatenate((y_train, np.expand_dims(y_train[y], axis=0)),
axis=0)
## Retrain the model
retrained_model = retrain(current_model,
x_train,
y_train,
x_test,
y_test,
batch_size=128,
epochs=5)
new_model_path = "{}{}/{}/{}/{}.h5".format(THIS_MODEL_DIR, dataset_name,
model_name, is_improve, str(T))
retrained_model.save(new_model_path)
# Step 4. Evaluate the current model
## Evaluate coverage
evaluate_coverage(retrained_model, l, T, x_train, y_train, x_test, y_test)
## Evaluate robustness
store_path = 'new_test/{}/{}'.format(dataset_name, model_name)
x_test_new = np.load(os.path.join(store_path, 'x_test_new.npy'))
evaluate_robustness(T, retrained_model, x_test, y_test, x_test_new)
print("Done")