How can you check if brainf*ck program is in an loop more than 5 seconds in python?

Question

I am making a program that makes a random Brainf*ck program in python and runs it. I have an interpreter and I need it to check for long loops (more than 5 seconds).
The interpreter is:

while i < len(code):
    if code[i] == '<':
        if pointerLocation > 0:
            pointerLocation -= 1
    elif code[i] == '>':
        pointerLocation += 1
        if len(array) <= pointerLocation:
            array.append(0)
    elif code[i] == '+':
        array[pointerLocation] += 1
    elif code[i] == '-':
        if array[pointerLocation] > 0:
            array[pointerLocation] -= 1
    elif code[i] == '.':
        print(array[pointerLocation], chr(array[pointerLocation]))
        result += chr(array[pointerLocation])
    elif code[i] == ',':
        #x = input("Input (1 CHARACTER!):")
        x = 'h'
        #increase time if user inputs
        t1 += 5
        try:
            y = int(x)
        except ValueError:
            y = ord(x)
        array[pointerLocation] = y
    elif code[i] == '[':
        if array[pointerLocation] == 0:
            open_braces = 1
            while open_braces > 0 and i+1 < len(code):
                i += 1
                if code[i] == '[':
                    open_braces += 1
                elif code[i] == ']':
                    open_braces -= 1
    elif code[i] == ']':
        # you don't need to check array[pointerLocation] because the matching '[' will skip behind this instruction if array[pointerLocation] is zero
        open_braces = 1
        while open_braces > 0:
            if t > 5:
                return [result,code,t]
                print(123)
            i -= 1
            if code[i] == '[':
                open_braces -= 1
            elif code[i] == ']':
                open_braces += 1
        # i still gets incremented in your main while loop
        i -= 1
    i += 1

Sorry for the long snippet, but I do believe it is all neccessary.

Answer 1

Set up an alarm when you enter the loop for 5 seconds. Cancel it when you exit. If the signal triggers then you handle it.

A weaker version of this is to obtain the time when you enter the loop, then check on each iteration to see if it's more than 5 seconds on each iteration.