死锁

import numpy as np

n_processes = int(input('Number of processes? '))
n_resources = int(input('Number of resources? '))

available_resources = [int(x) for x in input('Claim vector? ').split(' ')]

currently_allocated = np.array([[int(x) for x in input('Currently allocated for process ' + str(i + 1) + '? ').split(' ')] for i in range(n_processes)])
max_demand = np.array([[int(x) for x in input('Maximum demand from process ' + str(i + 1) + '? ').split(' ')] for i in range(n_processes)])

total_available = available_resources - np.sum(currently_allocated, axis=0)

running = np.ones(n_processes) # An array with n_processes 1's to indicate if process is yet to run

while np.count_nonzero(running) > 0:
	at_least_one_allocated = False
	for p in range(n_processes):
		if running[p]:
			if all(i >= 0 for i in total_available - (max_demand[p] - currently_allocated[p])):
				at_least_one_allocated = True
				print(str(p) + ' is running')
				running[p] = 0
				total_available += currently_allocated[p]
	if not at_least_one_allocated:
		print('Unsafe')
		exit()
				
print('Safe')