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 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 visit_LengthIdentifier(self, expr: 'LengthIdentifier', environment=None, usub=False): assert not usub return PyTexpr1.cst(environment, PyMPQIntervalCoeff(PyMPQInterval.top()))
def visit_LiteralEvaluation(self, stmt: 'LiteralEvaluation', environment=None, usub=False) -> PyTexpr1: if usub: cst = PyMPQScalarCoeff(-float(stmt.literal.val)) else: cst = PyMPQScalarCoeff(float(stmt.literal.val)) return PyTexpr1.cst(environment, cst)
def visit_Input(self, expr, environment=None, usub=False) -> PyTexpr1: assert not usub return PyTexpr1.cst(environment, PyMPQIntervalCoeff(PyMPQInterval.top()))
def visit_Literal(self, expr: 'Literal', environment=None, usub=False) -> PyTexpr1: if usub: cst = PyMPQScalarCoeff(-float(expr.val)) else: cst = PyMPQScalarCoeff(float(expr.val)) return PyTexpr1.cst(environment, cst)
def unsat(cls, environment: PyEnvironment): x = PyTexpr1.cst(environment, PyDoubleScalarCoeff(-1.0)) return cls.make(x, ConsTyp.AP_CONS_SUPEQ)