Library for generating (p)ast (t)ense (l)inear (t)emporal (l)ogic monitors as aiger circuits.
Project description
py-aiger-past-ltl
Library for generating (p)ast (t)ense (l)inear (t)emporal (l)ogic monitors as aiger circuits. Builds on the py-aiger project.
Table of Contents
Installation
If you just need to use aiger_ptltl
, you can just run:
$ pip install py-aiger-ptltl
For developers, note that this project uses the poetry python package/dependency management tool. Please familarize yourself with it and then run:
$ poetry install
Usage
The primary entry point for using aiger_ptltl
is the PTLTLExpr
class which is a simple extension of aiger.BoolExpr
to support the
temporal operators, historically, past (once), (variant) yesterday,
and since.
import aiger_ptltl as ptltl
# Atomic Propositions
x = ptltl.atom('x')
y = ptltl.atom('y')
z = ptltl.atom('z')
# Propositional logic
expr1 = ~x
expr2 = x & (y | z)
expr3 = (x & y) | ~z
expr4 = ~(x & y & z)
# Temporal Logic
expr5 = x.historically() # (H x) ≡ x has held for all previous cycles (inclusive).
expr6 = x.once() # (P x) ≡ x once held in a past cycle (inclusive).
expr7 = x.vyest() # (Z x) ≡ x held in the previous cycle (true at time = 0).
expr8 = x.since(y) # [x S y] ≡ x has held since the cycle after y last held.
# Composition
expr9 = expr7.since(expr8.vyest().vyest())
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