ModelRef Class Reference

Inheritance diagram for ModelRef:

Public Member Functions
	__init__ (self, m, ctx)
	__del__ (self)
	__repr__ (self)
	sexpr (self)
	eval (self, t, model_completion=False)
	evaluate (self, t, model_completion=False)
	__len__ (self)
	get_interp (self, decl)
	num_sorts (self)
	get_sort (self, idx)
	sorts (self)
	get_universe (self, s)
	__getitem__ (self, idx)
	decls (self)
	update_value (self, x, value)
	translate (self, target)
	project (self, vars, fml)
	project_with_witness (self, vars, fml)
	__copy__ (self)
	__deepcopy__ (self, memo={})
Public Member Functions inherited from Z3PPObject
	use_pp (self)

Data Fields
	model
	ctx

Additional Inherited Members
Protected Member Functions inherited from Z3PPObject
	_repr_html_ (self)

Detailed Description

Model/Solution of a satisfiability problem (aka system of constraints).

Definition at line 6558 of file z3py.py.

Constructor & Destructor Documentation

__init__()

__init__	(		self,
			m,
			ctx
	)

Definition at line 6561 of file z3py.py.

    def __init__(self, m, ctx):
        assert ctx is not None
        self.model = m
        self.ctx = ctx
        Z3_model_inc_ref(self.ctx.ref(), self.model)
 

__del__()

__del__

(

self

)

Definition at line 6567 of file z3py.py.

    def __del__(self):
        if self.ctx.ref() is not None and Z3_model_dec_ref is not None:
            Z3_model_dec_ref(self.ctx.ref(), self.model)
 

Member Function Documentation

__copy__()

__copy__

(

self

)

Definition at line 6897 of file z3py.py.

    def __copy__(self):
        return self.translate(self.ctx)
 

__deepcopy__()

__deepcopy__	(		self,
			memo = {}
	)

Definition at line 6900 of file z3py.py.

    def __deepcopy__(self, memo={}):
        return self.translate(self.ctx)
 
 

__getitem__()

__getitem__	(		self,
			idx
	)

If `idx` is an integer, then the declaration at position `idx` in the model `self` is returned.
If `idx` is a declaration, then the actual interpretation is returned.

The elements can be retrieved using position or the actual declaration.

>>> f = Function('f', IntSort(), IntSort())
>>> x = Int('x')
>>> s = Solver()
>>> s.add(x > 0, x < 2, f(x) == 0)
>>> s.check()
sat
>>> m = s.model()
>>> len(m)
2
>>> m[0]
x
>>> m[1]
f
>>> m[x]
1
>>> m[f]
[else -> 0]
>>> for d in m: print("%s -> %s" % (d, m[d]))
x -> 1
f -> [else -> 0]

Definition at line 6779 of file z3py.py.

    def __getitem__(self, idx):
        """If `idx` is an integer, then the declaration at position `idx` in the model `self` is returned.
        If `idx` is a declaration, then the actual interpretation is returned.
 
        The elements can be retrieved using position or the actual declaration.
 
        >>> f = Function('f', IntSort(), IntSort())
        >>> x = Int('x')
        >>> s = Solver()
        >>> s.add(x > 0, x < 2, f(x) == 0)
        >>> s.check()
        sat
        >>> m = s.model()
        >>> len(m)
        2
        >>> m[0]
        x
        >>> m[1]
        f
        >>> m[x]
        1
        >>> m[f]
        [else -> 0]
        >>> for d in m: print("%s -> %s" % (d, m[d]))
        x -> 1
        f -> [else -> 0]
        """
        if _is_int(idx):
            if idx >= len(self):
                raise IndexError
            num_consts = Z3_model_get_num_consts(self.ctx.ref(), self.model)
            if (idx < num_consts):
                return FuncDeclRef(Z3_model_get_const_decl(self.ctx.ref(), self.model, idx), self.ctx)
            else:
                return FuncDeclRef(Z3_model_get_func_decl(self.ctx.ref(), self.model, idx - num_consts), self.ctx)
        if isinstance(idx, FuncDeclRef):
            return self.get_interp(idx)
        if is_const(idx):
            return self.get_interp(idx.decl())
        if isinstance(idx, SortRef):
            return self.get_universe(idx)
        if z3_debug():
            _z3_assert(False, "Integer, Z3 declaration, or Z3 constant expected")
        return None
 

__len__()

__len__

(

self

)

Return the number of constant and function declarations in the model `self`.

>>> f = Function('f', IntSort(), IntSort())
>>> x = Int('x')
>>> s = Solver()
>>> s.add(x > 0, f(x) != x)
>>> s.check()
sat
>>> m = s.model()
>>> len(m)
2

Definition at line 6635 of file z3py.py.

    def __len__(self):
        """Return the number of constant and function declarations in the model `self`.
 
        >>> f = Function('f', IntSort(), IntSort())
        >>> x = Int('x')
        >>> s = Solver()
        >>> s.add(x > 0, f(x) != x)
        >>> s.check()
        sat
        >>> m = s.model()
        >>> len(m)
        2
        """
        num_consts = int(Z3_model_get_num_consts(self.ctx.ref(), self.model))
        num_funcs = int(Z3_model_get_num_funcs(self.ctx.ref(), self.model))
        return num_consts + num_funcs
 

Referenced by AstVector.__getitem__(), and AstVector.__setitem__().

__repr__()

__repr__

(

self

)

Definition at line 6571 of file z3py.py.

    def __repr__(self):
        return obj_to_string(self)
 

decls()

decls

(

self

)

Return a list with all symbols that have an interpretation in the model `self`.
>>> f = Function('f', IntSort(), IntSort())
>>> x = Int('x')
>>> s = Solver()
>>> s.add(x > 0, x < 2, f(x) == 0)
>>> s.check()
sat
>>> m = s.model()
>>> m.decls()
[x, f]

Definition at line 6824 of file z3py.py.

    def decls(self):
        """Return a list with all symbols that have an interpretation in the model `self`.
        >>> f = Function('f', IntSort(), IntSort())
        >>> x = Int('x')
        >>> s = Solver()
        >>> s.add(x > 0, x < 2, f(x) == 0)
        >>> s.check()
        sat
        >>> m = s.model()
        >>> m.decls()
        [x, f]
        """
        r = []
        for i in range(Z3_model_get_num_consts(self.ctx.ref(), self.model)):
            r.append(FuncDeclRef(Z3_model_get_const_decl(self.ctx.ref(), self.model, i), self.ctx))
        for i in range(Z3_model_get_num_funcs(self.ctx.ref(), self.model)):
            r.append(FuncDeclRef(Z3_model_get_func_decl(self.ctx.ref(), self.model, i), self.ctx))
        return r
 

eval()

eval	(		self,
			t,
			model_completion = False
	)

Evaluate the expression `t` in the model `self`.
If `model_completion` is enabled, then a default interpretation is automatically added
for symbols that do not have an interpretation in the model `self`.

>>> x = Int('x')
>>> s = Solver()
>>> s.add(x > 0, x < 2)
>>> s.check()
sat
>>> m = s.model()
>>> m.eval(x + 1)
2
>>> m.eval(x == 1)
True
>>> y = Int('y')
>>> m.eval(y + x)
1 + y
>>> m.eval(y)
y
>>> m.eval(y, model_completion=True)
0
>>> # Now, m contains an interpretation for y
>>> m.eval(y + x)
1

Definition at line 6578 of file z3py.py.

    def eval(self, t, model_completion=False):
        """Evaluate the expression `t` in the model `self`.
        If `model_completion` is enabled, then a default interpretation is automatically added
        for symbols that do not have an interpretation in the model `self`.
 
        >>> x = Int('x')
        >>> s = Solver()
        >>> s.add(x > 0, x < 2)
        >>> s.check()
        sat
        >>> m = s.model()
        >>> m.eval(x + 1)
        2
        >>> m.eval(x == 1)
        True
        >>> y = Int('y')
        >>> m.eval(y + x)
        1 + y
        >>> m.eval(y)
        y
        >>> m.eval(y, model_completion=True)
        0
        >>> # Now, m contains an interpretation for y
        >>> m.eval(y + x)
        1
        """
        r = (Ast * 1)()
        if Z3_model_eval(self.ctx.ref(), self.model, t.as_ast(), model_completion, r):
            return _to_expr_ref(r[0], self.ctx)
        raise Z3Exception("failed to evaluate expression in the model")
 

Referenced by ModelRef.evaluate().

evaluate()

evaluate	(		self,
			t,
			model_completion = False
	)

Alias for `eval`.

>>> x = Int('x')
>>> s = Solver()
>>> s.add(x > 0, x < 2)
>>> s.check()
sat
>>> m = s.model()
>>> m.evaluate(x + 1)
2
>>> m.evaluate(x == 1)
True
>>> y = Int('y')
>>> m.evaluate(y + x)
1 + y
>>> m.evaluate(y)
y
>>> m.evaluate(y, model_completion=True)
0
>>> # Now, m contains an interpretation for y
>>> m.evaluate(y + x)
1

Definition at line 6609 of file z3py.py.

    def evaluate(self, t, model_completion=False):
        """Alias for `eval`.
 
        >>> x = Int('x')
        >>> s = Solver()
        >>> s.add(x > 0, x < 2)
        >>> s.check()
        sat
        >>> m = s.model()
        >>> m.evaluate(x + 1)
        2
        >>> m.evaluate(x == 1)
        True
        >>> y = Int('y')
        >>> m.evaluate(y + x)
        1 + y
        >>> m.evaluate(y)
        y
        >>> m.evaluate(y, model_completion=True)
        0
        >>> # Now, m contains an interpretation for y
        >>> m.evaluate(y + x)
        1
        """
        return self.eval(t, model_completion)
 

get_interp()

get_interp	(		self,
			decl
	)

Return the interpretation for a given declaration or constant.

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

Definition at line 6652 of file z3py.py.

    def get_interp(self, decl):
        """Return the interpretation for a given declaration or constant.
 
        >>> f = Function('f', IntSort(), IntSort())
        >>> x = Int('x')
        >>> s = Solver()
        >>> s.add(x > 0, x < 2, f(x) == 0)
        >>> s.check()
        sat
        >>> m = s.model()
        >>> m[x]
        1
        >>> m[f]
        [else -> 0]
        """
        if z3_debug():
            _z3_assert(isinstance(decl, FuncDeclRef) or is_const(decl), "Z3 declaration expected")
        if is_const(decl):
            decl = decl.decl()
        try:
            if decl.arity() == 0:
                _r = Z3_model_get_const_interp(self.ctx.ref(), self.model, decl.ast)
                if _r.value is None:
                    return None
                r = _to_expr_ref(_r, self.ctx)
                if is_as_array(r):
                    fi = self.get_interp(get_as_array_func(r))
                    if fi is None:
                        return fi                    
                    e = fi.else_value()
                    if e is None:
                        return fi
                    if fi.arity() != 1:
                        return fi
                    srt = decl.range()
                    dom =  srt.domain()
                    e = K(dom, e)
                    i = 0
                    sz = fi.num_entries()
                    n = fi.arity()
                    while i < sz:
                        fe = fi.entry(i)
                        e = Store(e, fe.arg_value(0), fe.value())
                        i += 1
                    return e
                else:
                    return r
            else:
                return FuncInterp(Z3_model_get_func_interp(self.ctx.ref(), self.model, decl.ast), self.ctx)
        except Z3Exception:
            return None
 

Referenced by ModelRef.__getitem__(), and ModelRef.get_interp().

get_sort()

get_sort	(		self,
			idx
	)

Return the uninterpreted sort at position `idx` < self.num_sorts().

>>> A = DeclareSort('A')
>>> B = DeclareSort('B')
>>> a1, a2 = Consts('a1 a2', A)
>>> b1, b2 = Consts('b1 b2', B)
>>> s = Solver()
>>> s.add(a1 != a2, b1 != b2)
>>> s.check()
sat
>>> m = s.model()
>>> m.num_sorts()
2
>>> m.get_sort(0)
A
>>> m.get_sort(1)
B

Definition at line 6719 of file z3py.py.

    def get_sort(self, idx):
        """Return the uninterpreted sort at position `idx` < self.num_sorts().
 
        >>> A = DeclareSort('A')
        >>> B = DeclareSort('B')
        >>> a1, a2 = Consts('a1 a2', A)
        >>> b1, b2 = Consts('b1 b2', B)
        >>> s = Solver()
        >>> s.add(a1 != a2, b1 != b2)
        >>> s.check()
        sat
        >>> m = s.model()
        >>> m.num_sorts()
        2
        >>> m.get_sort(0)
        A
        >>> m.get_sort(1)
        B
        """
        if idx >= self.num_sorts():
            raise IndexError
        return _to_sort_ref(Z3_model_get_sort(self.ctx.ref(), self.model, idx), self.ctx)
 

Referenced by ModelRef.sorts().

get_universe()

get_universe	(		self,
			s
	)

Return the interpretation for the uninterpreted sort `s` in the model `self`.

>>> A = DeclareSort('A')
>>> a, b = Consts('a b', A)
>>> s = Solver()
>>> s.add(a != b)
>>> s.check()
sat
>>> m = s.model()
>>> m.get_universe(A)
[A!val!1, A!val!0]

Definition at line 6759 of file z3py.py.

    def get_universe(self, s):
        """Return the interpretation for the uninterpreted sort `s` in the model `self`.
 
        >>> A = DeclareSort('A')
        >>> a, b = Consts('a b', A)
        >>> s = Solver()
        >>> s.add(a != b)
        >>> s.check()
        sat
        >>> m = s.model()
        >>> m.get_universe(A)
        [A!val!1, A!val!0]
        """
        if z3_debug():
            _z3_assert(isinstance(s, SortRef), "Z3 sort expected")
        try:
            return AstVector(Z3_model_get_sort_universe(self.ctx.ref(), self.model, s.ast), self.ctx)
        except Z3Exception:
            return None
 

Referenced by ModelRef.__getitem__().

num_sorts()

num_sorts

(

self

)

Return the number of uninterpreted sorts that contain an interpretation in the model `self`.

>>> A = DeclareSort('A')
>>> a, b = Consts('a b', A)
>>> s = Solver()
>>> s.add(a != b)
>>> s.check()
sat
>>> m = s.model()
>>> m.num_sorts()
1

Definition at line 6704 of file z3py.py.

    def num_sorts(self):
        """Return the number of uninterpreted sorts that contain an interpretation in the model `self`.
 
        >>> A = DeclareSort('A')
        >>> a, b = Consts('a b', A)
        >>> s = Solver()
        >>> s.add(a != b)
        >>> s.check()
        sat
        >>> m = s.model()
        >>> m.num_sorts()
        1
        """
        return int(Z3_model_get_num_sorts(self.ctx.ref(), self.model))
 

Referenced by ModelRef.get_sort(), and ModelRef.sorts().

project()

project	(		self,
			vars,
			fml
	)

Perform model-based projection on fml with respect to vars.
Assume that the model satisfies fml. Then compute a projection fml_p, such
that vars do not occur free in fml_p, fml_p is true in the model and
fml_p => exists vars . fml

Definition at line 6873 of file z3py.py.

    def project(self, vars, fml):
        """Perform model-based projection on fml with respect to vars.
        Assume that the model satisfies fml. Then compute a projection fml_p, such
        that vars do not occur free in fml_p, fml_p is true in the model and
        fml_p => exists vars . fml
        """
        ctx = self.ctx.ref()
        _vars = (Ast * len(vars))()
        for i in range(len(vars)):
            _vars[i] = vars[i].as_ast()
        return _to_expr_ref(Z3_qe_model_project(ctx, self.model, len(vars), _vars, fml.ast), self.ctx)
 

project_with_witness()

project_with_witness	(		self,
			vars,
			fml
	)

Perform model-based projection, but also include realizer terms for the projected variables

Definition at line 6885 of file z3py.py.

    def project_with_witness(self, vars, fml):
        """Perform model-based projection, but also include realizer terms for the projected variables"""
        ctx = self.ctx.ref()
        _vars = (Ast * len(vars))()
        for i in range(len(vars)):
            _vars[i] = vars[i].as_ast()
        defs = AstMap()
        result = Z3_qe_model_project_with_witness(ctx, self.model, len(vars), _vars, fml.ast, defs.map)
        result = _to_expr_ref(result, self.ctx)
        return result, defs
 
 

sexpr()

sexpr

(

self

)

Return a textual representation of the s-expression representing the model.

Definition at line 6574 of file z3py.py.

    def sexpr(self):
        """Return a textual representation of the s-expression representing the model."""
        return Z3_model_to_string(self.ctx.ref(), self.model)
 

sorts()

sorts

(

self

)

Return all uninterpreted sorts that have an interpretation in the model `self`.

>>> A = DeclareSort('A')
>>> B = DeclareSort('B')
>>> a1, a2 = Consts('a1 a2', A)
>>> b1, b2 = Consts('b1 b2', B)
>>> s = Solver()
>>> s.add(a1 != a2, b1 != b2)
>>> s.check()
sat
>>> m = s.model()
>>> m.sorts()
[A, B]

Definition at line 6742 of file z3py.py.

    def sorts(self):
        """Return all uninterpreted sorts that have an interpretation in the model `self`.
 
        >>> A = DeclareSort('A')
        >>> B = DeclareSort('B')
        >>> a1, a2 = Consts('a1 a2', A)
        >>> b1, b2 = Consts('b1 b2', B)
        >>> s = Solver()
        >>> s.add(a1 != a2, b1 != b2)
        >>> s.check()
        sat
        >>> m = s.model()
        >>> m.sorts()
        [A, B]
        """
        return [self.get_sort(i) for i in range(self.num_sorts())]
 

translate()

translate	(		self,
			target
	)

Translate `self` to the context `target`. That is, return a copy of `self` in the context `target`.

Definition at line 6865 of file z3py.py.

    def translate(self, target):
        """Translate `self` to the context `target`. That is, return a copy of `self` in the context `target`.
        """
        if z3_debug():
            _z3_assert(isinstance(target, Context), "argument must be a Z3 context")
        model = Z3_model_translate(self.ctx.ref(), self.model, target.ref())
        return ModelRef(model, target)
 

Referenced by AstRef.__copy__(), Goal.__copy__(), AstVector.__copy__(), FuncInterp.__copy__(), ModelRef.__copy__(), Goal.__deepcopy__(), AstVector.__deepcopy__(), FuncInterp.__deepcopy__(), and ModelRef.__deepcopy__().

update_value()

update_value	(		self,
			x,
			value
	)

Update the interpretation of a constant

Definition at line 6843 of file z3py.py.

    def update_value(self, x, value):
        """Update the interpretation of a constant"""
        if is_expr(x):
            x = x.decl()
        if is_func_decl(x) and x.arity() != 0 and isinstance(value, FuncInterp):
            fi1 = value.f
            fi2 = Z3_add_func_interp(x.ctx_ref(), self.model, x.ast, value.else_value().ast);
            fi2 = FuncInterp(fi2, x.ctx)
            for i in range(value.num_entries()):
                e = value.entry(i)
                n = Z3_func_entry_get_num_args(x.ctx_ref(), e.entry)
                v = AstVector()
                for j in range(n):
                    v.push(e.arg_value(j))                    
                val = Z3_func_entry_get_value(x.ctx_ref(), e.entry)
                Z3_func_interp_add_entry(x.ctx_ref(), fi2.f, v.vector, val)
            return
        if not is_func_decl(x) or x.arity() != 0:
            raise Z3Exception("Expecting 0-ary function or constant expression")
        value = _py2expr(value)
        Z3_add_const_interp(x.ctx_ref(), self.model, x.ast, value.ast)
 

Field Documentation

ctx

ctx

Definition at line 6564 of file z3py.py.

Referenced by ArithRef.__add__(), BitVecRef.__add__(), BitVecRef.__and__(), FuncDeclRef.__call__(), AstMap.__contains__(), AstRef.__copy__(), Goal.__copy__(), AstVector.__copy__(), FuncInterp.__copy__(), ModelRef.__copy__(), AstRef.__deepcopy__(), Datatype.__deepcopy__(), ParamsRef.__deepcopy__(), ParamDescrsRef.__deepcopy__(), Goal.__deepcopy__(), AstVector.__deepcopy__(), AstMap.__deepcopy__(), FuncEntry.__deepcopy__(), FuncInterp.__deepcopy__(), ModelRef.__deepcopy__(), Statistics.__deepcopy__(), Context.__del__(), AstRef.__del__(), ScopedConstructor.__del__(), ScopedConstructorList.__del__(), ParamsRef.__del__(), ParamDescrsRef.__del__(), Goal.__del__(), AstVector.__del__(), AstMap.__del__(), FuncEntry.__del__(), FuncInterp.__del__(), ModelRef.__del__(), Statistics.__del__(), Solver.__del__(), ArithRef.__div__(), BitVecRef.__div__(), ExprRef.__eq__(), ArithRef.__ge__(), BitVecRef.__ge__(), AstVector.__getitem__(), ModelRef.__getitem__(), Statistics.__getitem__(), AstMap.__getitem__(), ArithRef.__gt__(), BitVecRef.__gt__(), BitVecRef.__invert__(), ArithRef.__le__(), BitVecRef.__le__(), AstVector.__len__(), AstMap.__len__(), ModelRef.__len__(), Statistics.__len__(), BitVecRef.__lshift__(), ArithRef.__lt__(), BitVecRef.__lt__(), ArithRef.__mod__(), BitVecRef.__mod__(), BoolRef.__mul__(), ArithRef.__mul__(), BitVecRef.__mul__(), ExprRef.__ne__(), ArithRef.__neg__(), BitVecRef.__neg__(), BitVecRef.__or__(), ArithRef.__pow__(), ArithRef.__radd__(), BitVecRef.__radd__(), BitVecRef.__rand__(), ArithRef.__rdiv__(), BitVecRef.__rdiv__(), ParamsRef.__repr__(), ParamDescrsRef.__repr__(), AstMap.__repr__(), Statistics.__repr__(), BitVecRef.__rlshift__(), ArithRef.__rmod__(), BitVecRef.__rmod__(), ArithRef.__rmul__(), BitVecRef.__rmul__(), BitVecRef.__ror__(), ArithRef.__rpow__(), BitVecRef.__rrshift__(), BitVecRef.__rshift__(), ArithRef.__rsub__(), BitVecRef.__rsub__(), BitVecRef.__rxor__(), AstVector.__setitem__(), AstMap.__setitem__(), ArithRef.__sub__(), BitVecRef.__sub__(), BitVecRef.__xor__(), DatatypeSortRef.accessor(), ExprRef.arg(), FuncEntry.arg_value(), FuncInterp.arity(), Goal.as_expr(), Solver.assert_and_track(), Goal.assert_exprs(), Solver.assert_exprs(), QuantifierRef.body(), Solver.check(), Goal.convert_model(), AstRef.ctx_ref(), ExprRef.decl(), ModelRef.decls(), ArrayRef.default(), RatNumRef.denominator(), Goal.depth(), Goal.dimacs(), FuncDeclRef.domain(), ArraySortRef.domain_n(), FuncInterp.else_value(), FuncInterp.entry(), AstMap.erase(), ModelRef.eval(), Goal.get(), ParamDescrsRef.get_documentation(), ModelRef.get_interp(), Statistics.get_key_value(), ParamDescrsRef.get_kind(), ParamDescrsRef.get_name(), ModelRef.get_sort(), ModelRef.get_universe(), Goal.inconsistent(), AstMap.keys(), Statistics.keys(), Solver.model(), SortRef.name(), QuantifierRef.no_pattern(), FuncEntry.num_args(), FuncInterp.num_entries(), Solver.num_scopes(), ModelRef.num_sorts(), FuncDeclRef.params(), QuantifierRef.pattern(), AlgebraicNumRef.poly(), Solver.pop(), Goal.prec(), ModelRef.project(), ModelRef.project_with_witness(), Solver.push(), AstVector.push(), QuantifierRef.qid(), FuncDeclRef.range(), ArraySortRef.range(), DatatypeSortRef.recognizer(), Context.ref(), AstMap.reset(), Solver.reset(), AstVector.resize(), Solver.set(), ParamsRef.set(), Goal.sexpr(), AstVector.sexpr(), ModelRef.sexpr(), ParamDescrsRef.size(), Goal.size(), QuantifierRef.skolem_id(), AstVector.translate(), AstRef.translate(), Goal.translate(), ModelRef.translate(), ExprRef.update(), ParamsRef.validate(), FuncEntry.value(), QuantifierRef.var_name(), and QuantifierRef.var_sort().

model

model

Definition at line 6563 of file z3py.py.

Referenced by ModelRef.__del__(), ModelRef.__getitem__(), ModelRef.__len__(), ModelRef.decls(), ModelRef.eval(), ModelRef.get_interp(), ModelRef.get_sort(), ModelRef.get_universe(), ModelRef.num_sorts(), ModelRef.project(), ModelRef.project_with_witness(), ModelRef.sexpr(), ModelRef.translate(), and ModelRef.update_value().