def isinit_test(self, no_str):
self.str_to_int()
init = {'env': self.env_init, 'sys': self.sys_init}
pyinit = dict()
for side, clauses in init.items():
if no_str:
clauses = [self._bool_int[x] for x in clauses]
logger.info('clauses to compile: ' + str(clauses))
c = [
ts.translate_ast(self.ast(x), 'python').flatten() for x in clauses
]
logger.info('after translation to python: ' + str(c))
s = _conj(c, op='and')
if not s:
s = 'True'
pyinit[side] = s
# Do the conjunction of assumptions (env_init) and assertions (sys_init)
s = '({assumption}) and ({assertion})'.format(assumption=pyinit['env'],
assertion=pyinit['sys'])
# The original code looked like this. Every state was considered a valid
# initial state if not (env_init) or (sys_init)
# s = 'not ({assumption}) or ({assertion})'.format(
# assumption=pyinit['env'],
# assertion=pyinit['sys'])
logger.info(
'should be valid in initial states: {formula}'.format(formula=s))
return compile(s, '<string>', 'eval')
def test_translate_ast_to_gr1c():
x = '(loc = "s2") -> X((((env_alice = "left") && (env_bob = "bright"))))'
s = spec.GRSpec(sys_vars={'loc': ['s0', 's2'],
'env_alice': ['left', 'right'],
'env_bob': ['bleft', 'bright']},
sys_safety=[x])
s.str_to_int()
sint = s._bool_int[x]
print(repr(sint))
rint = s.ast(sint)
print(repr(rint))
r = ts.translate_ast(rint, 'gr1c')
print(repr(r))
print(r.flatten())
assert r.flatten() == ("( ( loc = 1 ) -> "
"( ( env_alice' = 0 ) & ( env_bob' = 1 ) ) )")
def test_translate_ast_to_gr1c():
x = '(loc = "s2") -> X((((env_alice = "left") && (env_bob = "bright"))))'
s = spec.GRSpec(sys_vars={
'loc': ['s0', 's2'],
'env_alice': ['left', 'right'],
'env_bob': ['bleft', 'bright']
},
sys_safety=[x])
s.str_to_int()
sint = s._bool_int[x]
print(repr(sint))
rint = s.ast(sint)
print(repr(rint))
r = ts.translate_ast(rint, 'gr1c')
print(repr(r))
print(r.flatten())
assert r.flatten() == ("( ( loc = 1 ) -> "
"( ( env_alice' = 0 ) & ( env_bob' = 1 ) ) )")
def compile_init(self, no_str):
"""Compile python expression for initial conditions.
The returned bytecode can be used with C{eval}
and a C{dict} assigning values to variables.
Its value is the implication
C{env_init => sys_init}
Use the corresponding python data types
for the C{dict} values:
- C{bool} for Boolean variables
- C{int} for integers
- C{str} for arbitrary finite types
@param no_str: if True, then compile the formula
where all string variables have been replaced by integers.
Otherwise compile the original formula containing strings.
@return: python expression compiled for C{eval}
@rtype: C{code}
"""
self.str_to_int()
init = {'env': self.env_init, 'sys': self.sys_init}
pyinit = dict()
for side, clauses in init.items():
if no_str:
clauses = [self._bool_int[x] for x in clauses]
logger.info('clauses to compile: ' + str(clauses))
c = [
ts.translate_ast(self.ast(x), 'python').flatten()
for x in clauses
]
logger.info('after translation to python: ' + str(c))
s = _conj(c, op='and')
if not s:
s = 'True'
pyinit[side] = s
s = 'not ({assumption}) or ({assertion})'.format(
assumption=pyinit['env'], assertion=pyinit['sys'])
return compile(s, '<string>', 'eval')
def compile_init(self, no_str):
"""Compile python expression for initial conditions.
The returned bytecode can be used with C{eval}
and a C{dict} assigning values to variables.
Its value is the conjunction of C{env_init} and C{sys_init}.
Use the corresponding python data types
for the C{dict} values:
- C{bool} for Boolean variables
- C{int} for integers
- C{str} for arbitrary finite types
@param no_str: if True, then compile the formula
where all string variables have been replaced by integers.
Otherwise compile the original formula containing strings.
@return: python expression compiled for C{eval}
@rtype: C{code}
"""
self.str_to_int()
init = {'env': self.env_init, 'sys': self.sys_init}
pyinit = dict()
for side, clauses in init.iteritems():
if no_str:
clauses = [self._bool_int[x] for x in clauses]
logger.info('clauses to compile: ' + str(clauses))
c = [ts.translate_ast(self.ast(x), 'python').flatten()
for x in clauses]
logger.info('after translation to python: ' + str(c))
s = _conj(c, op='and')
if not s:
s = 'True'
pyinit[side] = s
s = 'not ({assumption}) or ({assertion})'.format(
assumption=pyinit['env'],
assertion=pyinit['sys'])
return compile(s, '<string>', 'eval')
def synthesize(formula, env_vars=None, sys_vars=None):
"""Return Moore transducer if C{formula} is realizable.
Variable C{dict}s have variable names as keys and their type as
value. The types should be 'boolean'. These parameters are only
used if formula is of type C{str}. Else, the variable dictionaries
associated with the L{LTL} or L{GRSpec} object are used.
@param formula: linear temporal logic formula
@type formula: C{str}, L{LTL}, or L{GRSpec}
@param env_vars: uncontrolled variables (inputs); used only if
C{formula} is of type C{str}
@type env_vars: C{dict} or None
@param sys_vars: controlled variables (outputs); used only if
C{formula} is of type C{str}
@type sys_vars: C{dict} or None
@return: symbolic Moore transducer
(guards are conjunctions, not sets)
@rtype: L{MooreMachine}
"""
if isinstance(formula, GRSpec):
env_vars = formula.env_vars
sys_vars = formula.sys_vars
elif isinstance(formula, LTL):
env_vars = formula.input_variables
sys_vars = formula.output_variables
all_vars = dict(env_vars)
all_vars.update(sys_vars)
if not all(v == 'boolean' for v in all_vars.itervalues()):
raise TypeError(
'all variables should be Boolean:\n{v}'.format(v=all_vars))
if isinstance(formula, GRSpec):
f = translate(formula, 'wring')
else:
T = parse(str(formula))
f = translate_ast(T, 'wring').flatten(env_vars=env_vars,
sys_vars=sys_vars)
# dump partition file
s = '.inputs {inp}\n.outputs {out}'.format(
inp=' '.join(env_vars),
out=' '.join(sys_vars)
)
with open(IO_PARTITION_FILE, 'w') as fid:
fid.write(s)
# call lily
try:
p = subprocess.Popen([LILY, '-f', f, '-syn', IO_PARTITION_FILE],
stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
out = p.stdout.read()
except OSError as e:
if e.errno == os.errno.ENOENT:
raise Exception(
'lily.pl not found in path.\n'
'See the Lily docs for setting PERL5LIB and PATH.')
else:
raise
dotf = open(DOTFILE, 'r')
fail_msg = 'Formula is not realizable'
if dotf.read(len(fail_msg)) == fail_msg:
return None
dotf.seek(0)
g = nx.read_dot(dotf)
dotf.close()
moore = lily_strategy2moore(g, env_vars, sys_vars)
return moore
