Z3
 
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FuncInterp Class Reference
+ Inheritance diagram for FuncInterp:

Public Member Functions

 __init__ (self, f, ctx)
 
 __del__ (self)
 
 else_value (self)
 
 num_entries (self)
 
 arity (self)
 
 entry (self, idx)
 
 translate (self, other_ctx)
 
 __copy__ (self)
 
 __deepcopy__ (self, memo={})
 
 as_list (self)
 
 __repr__ (self)
 
- Public Member Functions inherited from Z3PPObject
 use_pp (self)
 

Data Fields

 f = f
 
 ctx = ctx
 
 model
 

Additional Inherited Members

- Protected Member Functions inherited from Z3PPObject
 _repr_html_ (self)
 

Detailed Description

Stores the interpretation of a function in a Z3 model.

Definition at line 6330 of file z3py.py.

Constructor & Destructor Documentation

◆ __init__()

__init__ ( self,
f,
ctx )

Definition at line 6333 of file z3py.py.

6333 def __init__(self, f, ctx):
6334 self.f = f
6335 self.ctx = ctx
6336 if self.f is not None:
6337 Z3_func_interp_inc_ref(self.ctx.ref(), self.f)
6338
void Z3_API Z3_func_interp_inc_ref(Z3_context c, Z3_func_interp f)
Increment the reference counter of the given Z3_func_interp object.

◆ __del__()

__del__ ( self)

Definition at line 6339 of file z3py.py.

6339 def __del__(self):
6340 if self.f is not None and self.ctx.ref() is not None and Z3_func_interp_dec_ref is not None:
6341 Z3_func_interp_dec_ref(self.ctx.ref(), self.f)
6342
void Z3_API Z3_func_interp_dec_ref(Z3_context c, Z3_func_interp f)
Decrement the reference counter of the given Z3_func_interp object.

Member Function Documentation

◆ __copy__()

__copy__ ( self)

Definition at line 6421 of file z3py.py.

6421 def __copy__(self):
6422 return self.translate(self.ctx)
6423

◆ __deepcopy__()

__deepcopy__ ( self,
memo = {} )

Definition at line 6424 of file z3py.py.

6424 def __deepcopy__(self, memo={}):
6425 return self.translate(self.ctx)
6426

◆ __repr__()

__repr__ ( self)

Definition at line 6444 of file z3py.py.

6444 def __repr__(self):
6445 return obj_to_string(self)
6446
6447

◆ arity()

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 6382 of file z3py.py.

6382 def arity(self):
6383 """Return the number of arguments for each entry in the function interpretation `self`.
6384
6385 >>> f = Function('f', IntSort(), IntSort())
6386 >>> s = Solver()
6387 >>> s.add(f(0) == 1, f(1) == 1, f(2) == 0)
6388 >>> s.check()
6389 sat
6390 >>> m = s.model()
6391 >>> m[f].arity()
6392 1
6393 """
6394 return int(Z3_func_interp_get_arity(self.ctx.ref(), self.f))
6395
unsigned Z3_API Z3_func_interp_get_arity(Z3_context c, Z3_func_interp f)
Return the arity (number of arguments) of the given function interpretation.

◆ as_list()

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]
[2 -> 0, else -> 1]
>>> m[f].as_list()
[[2, 0], 1]

Definition at line 6427 of file z3py.py.

6427 def as_list(self):
6428 """Return the function interpretation as a Python list.
6429 >>> f = Function('f', IntSort(), IntSort())
6430 >>> s = Solver()
6431 >>> s.add(f(0) == 1, f(1) == 1, f(2) == 0)
6432 >>> s.check()
6433 sat
6434 >>> m = s.model()
6435 >>> m[f]
6436 [2 -> 0, else -> 1]
6437 >>> m[f].as_list()
6438 [[2, 0], 1]
6439 """
6440 r = [self.entry(i).as_list() for i in range(self.num_entries())]
6441 r.append(self.else_value())
6442 return r
6443

Referenced by as_list().

◆ else_value()

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]
[2 -> 0, else -> 1]
>>> m[f].else_value()
1

Definition at line 6343 of file z3py.py.

6343 def else_value(self):
6344 """
6345 Return the `else` value for a function interpretation.
6346 Return None if Z3 did not specify the `else` value for
6347 this object.
6348
6349 >>> f = Function('f', IntSort(), IntSort())
6350 >>> s = Solver()
6351 >>> s.add(f(0) == 1, f(1) == 1, f(2) == 0)
6352 >>> s.check()
6353 sat
6354 >>> m = s.model()
6355 >>> m[f]
6356 [2 -> 0, else -> 1]
6357 >>> m[f].else_value()
6358 1
6359 """
6360 r = Z3_func_interp_get_else(self.ctx.ref(), self.f)
6361 if r:
6362 return _to_expr_ref(r, self.ctx)
6363 else:
6364 return None
6365
Z3_ast Z3_API Z3_func_interp_get_else(Z3_context c, Z3_func_interp f)
Return the 'else' value of the given function interpretation.

Referenced by as_list().

◆ entry()

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]
[2 -> 0, else -> 1]
>>> m[f].num_entries()
1
>>> m[f].entry(0)
[2, 0]

Definition at line 6396 of file z3py.py.

6396 def entry(self, idx):
6397 """Return an entry at position `idx < self.num_entries()` in the function interpretation `self`.
6398
6399 >>> f = Function('f', IntSort(), IntSort())
6400 >>> s = Solver()
6401 >>> s.add(f(0) == 1, f(1) == 1, f(2) == 0)
6402 >>> s.check()
6403 sat
6404 >>> m = s.model()
6405 >>> m[f]
6406 [2 -> 0, else -> 1]
6407 >>> m[f].num_entries()
6408 1
6409 >>> m[f].entry(0)
6410 [2, 0]
6411 """
6412 if idx >= self.num_entries():
6413 raise IndexError
6414 return FuncEntry(Z3_func_interp_get_entry(self.ctx.ref(), self.f, idx), self.ctx)
6415
Z3_func_entry Z3_API Z3_func_interp_get_entry(Z3_context c, Z3_func_interp f, unsigned i)
Return a "point" of the given function interpretation. It represents the value of f in a particular p...

Referenced by as_list().

◆ num_entries()

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]
[2 -> 0, else -> 1]
>>> m[f].num_entries()
1

Definition at line 6366 of file z3py.py.

6366 def num_entries(self):
6367 """Return the number of entries/points in the function interpretation `self`.
6368
6369 >>> f = Function('f', IntSort(), IntSort())
6370 >>> s = Solver()
6371 >>> s.add(f(0) == 1, f(1) == 1, f(2) == 0)
6372 >>> s.check()
6373 sat
6374 >>> m = s.model()
6375 >>> m[f]
6376 [2 -> 0, else -> 1]
6377 >>> m[f].num_entries()
6378 1
6379 """
6380 return int(Z3_func_interp_get_num_entries(self.ctx.ref(), self.f))
6381
unsigned Z3_API Z3_func_interp_get_num_entries(Z3_context c, Z3_func_interp f)
Return the number of entries in the given function interpretation.

Referenced by as_list(), and entry().

◆ translate()

translate ( self,
other_ctx )
Copy model 'self' to context 'other_ctx'.

Definition at line 6416 of file z3py.py.

6416 def translate(self, other_ctx):
6417 """Copy model 'self' to context 'other_ctx'.
6418 """
6419 return ModelRef(Z3_model_translate(self.ctx.ref(), self.model, other_ctx.ref()), other_ctx)
6420
Z3_model Z3_API Z3_model_translate(Z3_context c, Z3_model m, Z3_context dst)
translate model from context c to context dst.

Referenced by __copy__(), ModelRef.__copy__(), __deepcopy__(), and ModelRef.__deepcopy__().

Field Documentation

◆ ctx

◆ f

f = f

Definition at line 6334 of file z3py.py.

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

◆ model