FuncInterp Class Reference

Inheritance diagram for FuncInterp:

Public Member Functions
def	__init__ (self, f, ctx)
def	__del__ (self)
def	else_value (self)
def	num_entries (self)
def	arity (self)
def	entry (self, idx)
def	as_list (self)
def	__repr__ (self)
Public Member Functions inherited from Z3PPObject
def	use_pp (self)

Data Fields
	f
	ctx

Detailed Description

Stores the interpretation of a function in a Z3 model.

Definition at line 5161 of file z3py.py.

Constructor & Destructor Documentation

def __init__	(		self,
			f,
			ctx
	)

Definition at line 5164 of file z3py.py.

    def __init__(self, f, ctx):
        self.f   = f
        self.ctx = ctx
        if self.f != None:
            Z3_func_interp_inc_ref(self.ctx.ref(), self.f)

def __del__

(

self

)

Definition at line 5170 of file z3py.py.

    def __del__(self):
        if self.f != None:
            Z3_func_interp_dec_ref(self.ctx.ref(), self.f)

Member Function Documentation

def __repr__

(

self

)

Definition at line 5268 of file z3py.py.

    def __repr__(self):
        return obj_to_string(self)

def arity

(

self

)

Return the number of arguments for each entry in the function interpretation `self`.

>>> f = Function('f', IntSort(), IntSort())
>>> s = Solver()
>>> s.add(f(0) == 1, f(1) == 1, f(2) == 0)
>>> s.check()
sat
>>> m = s.model()
>>> m[f].arity()
1

Definition at line 5213 of file z3py.py.

    def arity(self):
        """Return the number of arguments for each entry in the function interpretation `self`.

        >>> f = Function('f', IntSort(), IntSort())
        >>> s = Solver()
        >>> s.add(f(0) == 1, f(1) == 1, f(2) == 0)
        >>> s.check()
        sat
        >>> m = s.model()
        >>> m[f].arity()
        1
        """
        return int(Z3_func_interp_get_arity(self.ctx.ref(), self.f))
    

def as_list

(

self

)

Return the function interpretation as a Python list.
>>> f = Function('f', IntSort(), IntSort())
>>> s = Solver()
>>> s.add(f(0) == 1, f(1) == 1, f(2) == 0)
>>> s.check()
sat
>>> m = s.model()
>>> m[f]
[0 -> 1, 1 -> 1, 2 -> 0, else -> 1]
>>> m[f].as_list()
[[0, 1], [1, 1], [2, 0], 1]

Definition at line 5251 of file z3py.py.

    def as_list(self):
        """Return the function interpretation as a Python list.
        >>> f = Function('f', IntSort(), IntSort())
        >>> s = Solver()
        >>> s.add(f(0) == 1, f(1) == 1, f(2) == 0)
        >>> s.check()
        sat
        >>> m = s.model()
        >>> m[f]
        [0 -> 1, 1 -> 1, 2 -> 0, else -> 1]
        >>> m[f].as_list()
        [[0, 1], [1, 1], [2, 0], 1]
        """
        r = [ self.entry(i).as_list() for i in range(self.num_entries())]
        r.append(self.else_value())
        return r

def else_value

(

self

)

Return the `else` value for a function interpretation.
Return None if Z3 did not specify the `else` value for
this object.

>>> f = Function('f', IntSort(), IntSort())
>>> s = Solver()
>>> s.add(f(0) == 1, f(1) == 1, f(2) == 0)
>>> s.check()
sat
>>> m = s.model()
>>> m[f]
[0 -> 1, 1 -> 1, 2 -> 0, else -> 1]
>>> m[f].else_value()
1

Definition at line 5174 of file z3py.py.

Referenced by FuncInterp.as_list().

    def else_value(self):
        """
        Return the `else` value for a function interpretation.
        Return None if Z3 did not specify the `else` value for
        this object.

        >>> f = Function('f', IntSort(), IntSort())
        >>> s = Solver()
        >>> s.add(f(0) == 1, f(1) == 1, f(2) == 0)
        >>> s.check()
        sat
        >>> m = s.model()
        >>> m[f]
        [0 -> 1, 1 -> 1, 2 -> 0, else -> 1]
        >>> m[f].else_value()
        1
        """
        r = Z3_func_interp_get_else(self.ctx.ref(), self.f)
        if r:
            return _to_expr_ref(r, self.ctx)
        else:
            return None

def entry	(		self,
			idx
	)

Return an entry at position `idx < self.num_entries()` in the function interpretation `self`.

>>> f = Function('f', IntSort(), IntSort())
>>> s = Solver()
>>> s.add(f(0) == 1, f(1) == 1, f(2) == 0)
>>> s.check()
sat
>>> m = s.model()
>>> m[f]
[0 -> 1, 1 -> 1, 2 -> 0, else -> 1]
>>> m[f].num_entries()
3
>>> m[f].entry(0)
[0, 1]
>>> m[f].entry(1)
[1, 1]
>>> m[f].entry(2)
[2, 0]

Definition at line 5227 of file z3py.py.

Referenced by FuncInterp.as_list().

    def entry(self, idx):
        """Return an entry at position `idx < self.num_entries()` in the function interpretation `self`.

        >>> f = Function('f', IntSort(), IntSort())
        >>> s = Solver()
        >>> s.add(f(0) == 1, f(1) == 1, f(2) == 0)
        >>> s.check()
        sat
        >>> m = s.model()
        >>> m[f]
        [0 -> 1, 1 -> 1, 2 -> 0, else -> 1]
        >>> m[f].num_entries()
        3
        >>> m[f].entry(0)
        [0, 1]
        >>> m[f].entry(1)
        [1, 1]
        >>> m[f].entry(2)
        [2, 0]
        """
        if idx >= self.num_entries():
            raise IndexError
        return FuncEntry(Z3_func_interp_get_entry(self.ctx.ref(), self.f, idx), self.ctx)
    

def num_entries

(

self

)

Return the number of entries/points in the function interpretation `self`.

>>> f = Function('f', IntSort(), IntSort())
>>> s = Solver()
>>> s.add(f(0) == 1, f(1) == 1, f(2) == 0)
>>> s.check()
sat
>>> m = s.model()
>>> m[f]
[0 -> 1, 1 -> 1, 2 -> 0, else -> 1]
>>> m[f].num_entries()
3

Definition at line 5197 of file z3py.py.

Referenced by FuncInterp.as_list(), and FuncInterp.entry().

    def num_entries(self):
        """Return the number of entries/points in the function interpretation `self`.

        >>> f = Function('f', IntSort(), IntSort())
        >>> s = Solver()
        >>> s.add(f(0) == 1, f(1) == 1, f(2) == 0)
        >>> s.check()
        sat
        >>> m = s.model()
        >>> m[f]
        [0 -> 1, 1 -> 1, 2 -> 0, else -> 1]
        >>> m[f].num_entries()
        3
        """
        return int(Z3_func_interp_get_num_entries(self.ctx.ref(), self.f))

Field Documentation

ctx

Definition at line 5166 of file z3py.py.

Referenced by Probe.__eq__(), Probe.__ge__(), ApplyResult.__getitem__(), Probe.__gt__(), Probe.__le__(), Probe.__lt__(), Probe.__ne__(), Fixedpoint.add_rule(), Tactic.apply(), ApplyResult.as_expr(), Fixedpoint.assert_exprs(), ApplyResult.convert_model(), FuncInterp.else_value(), FuncInterp.entry(), Fixedpoint.get_answer(), Fixedpoint.get_assertions(), Fixedpoint.get_cover_delta(), Fixedpoint.get_rules(), Fixedpoint.param_descrs(), Tactic.param_descrs(), Fixedpoint.parse_file(), Fixedpoint.parse_string(), Fixedpoint.set(), Tactic.solver(), Fixedpoint.statistics(), Solver.to_smt2(), and Fixedpoint.update_rule().

f

Definition at line 5165 of file z3py.py.

Referenced by FuncInterp.__del__(), FuncInterp.arity(), FuncInterp.as_list(), FuncInterp.else_value(), FuncInterp.entry(), and FuncInterp.num_entries().