def relu(self,
stmt: PyVar,
active: bool = False,
inactive: bool = False) -> 'BoxState':
self.flag = None
if active: # we only do the active case (h >= 0)
expr1 = PyTexpr1.var(self.environment, stmt)
cond = PyTcons1.make(expr1, ConsTyp.AP_CONS_SUPEQ)
abstract1 = self.domain(self.state.manager,
self.environment,
array=PyTcons1Array([cond]))
self.state = self.state.meet(abstract1)
self.flag = 1
return self
if inactive: # we only do the inactive case (h < 0)
expr1 = PyTexpr1.var(self.environment, stmt)
neg = PyTexpr1.unop(TexprOp.AP_TEXPR_NEG, expr1, rtype, rdir)
cond = PyTcons1.make(neg, ConsTyp.AP_CONS_SUP)
abstract1 = self.domain(self.state.manager,
self.environment,
array=PyTcons1Array([cond]))
zero = PyTexpr1.cst(self.environment, PyMPQScalarCoeff(0.0))
self.state = self.state.meet(abstract1).assign(stmt, zero)
self.flag = -1
return self
# we do both cases
_active, _inactive = deepcopy(self.state), deepcopy(self.state)
expr1 = PyTexpr1.var(self.environment, stmt)
cond1 = PyTcons1.make(expr1, ConsTyp.AP_CONS_SUPEQ)
abstract1 = self.domain(self.state.manager,
self.environment,
array=PyTcons1Array([cond1]))
_active = _active.meet(abstract1)
expr2 = PyTexpr1.var(self.environment, stmt)
neg = PyTexpr1.unop(TexprOp.AP_TEXPR_NEG, expr2, rtype, rdir)
cond2 = PyTcons1.make(neg, ConsTyp.AP_CONS_SUP)
abstract2 = self.domain(self.state.manager,
self.environment,
array=PyTcons1Array([cond2]))
zero = PyTexpr1.cst(self.environment, PyMPQScalarCoeff(0.0))
_inactive = _inactive.meet(abstract2).assign(stmt, zero)
if _active.is_bottom():
self.flag = -1
elif _inactive.is_bottom():
self.flag = 1
join = _active.join(_inactive)
self.state = join
return self
def test_bound_texpr(self):
e = PyEnvironment([PyVar('x0'), PyVar('y')], [PyVar('z')])
man: PyManager = PyBoxMPQManager()
variables = [PyVar('x0'), PyVar('y')]
intervals = [PyMPQInterval(-3, 2), PyMPQInterval(-2, 2, 1, 1)]
b = PyBox(man, e, variables=variables, intervals=intervals)
x0 = PyTexpr1.var(e, PyVar('x0'))
x1 = PyTexpr1.var(e, PyVar('y'))
add = PyTexpr1.binop(TexprOp.AP_TEXPR_ADD, x0, x1,
TexprRtype.AP_RTYPE_REAL, TexprRdir.AP_RDIR_RND)
self.assertEqual(str(b.bound_texpr(add)), '[-5,4]')
def dict_to_texpr(todict, env):
texpr = PyTexpr1.cst(env, PyMPQScalarCoeff(PyMPQScalar(todict['_'])))
for var, val in reversed(list(todict.items())):
if var != '_':
coeff = PyTexpr1.cst(env, PyMPQScalarCoeff(PyMPQScalar(val)))
dim = PyTexpr1.var(env, PyVar(var))
term = PyTexpr1.binop(TexprOp.AP_TEXPR_MUL, coeff, dim,
TexprRtype.AP_RTYPE_REAL,
TexprRdir.AP_RDIR_RND)
texpr = PyTexpr1.binop(TexprOp.AP_TEXPR_ADD, term, texpr,
TexprRtype.AP_RTYPE_REAL,
TexprRdir.AP_RDIR_RND)
return texpr
def affine(self, left: List[PyVar],
right: List[PyTexpr1]) -> 'Symbolic1State':
array = list()
assignments = dict()
for lhs, expr in zip(left, right):
rhs = expr
for sym, val in self.symbols.values():
rhs = rhs.substitute(sym, val)
assignments[str(lhs)] = (lhs, rhs)
var = PyTexpr1.var(self.environment, lhs)
binop = PyTexpr1.binop(TexprOp.AP_TEXPR_SUB, var, rhs, rtype, rdir)
cond = PyTcons1.make(binop, ConsTyp.AP_CONS_EQ)
array.append(cond)
self.symbols = assignments
self.state = self.state.meet(PyTcons1Array(array))
return self
def visit_VariableIdentifier(self, expr, environment=None, usub=False) -> PyTexpr1:
assert not usub
return PyTexpr1.var(environment, PyVar(expr.name))
def visit_VariableAccess(self,
stmt: 'VariableAccess',
environment=None,
usub=False) -> PyTexpr1:
assert not usub
return PyTexpr1.var(environment, PyVar(stmt.variable.name))
def visit_Subscription(self,
expr: 'Subscription',
environment=None,
usub=False):
assert not usub
return PyTexpr1.var(environment, PyVar(expr.target.name))
def visit_Slicing(self, expr: 'Slicing', environment=None, usub=False):
assert not usub
return PyTexpr1.var(environment, PyVar(expr.target.name))
