Z3
 
Loading...
Searching...
No Matches
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 6339 of file z3py.py.

Constructor & Destructor Documentation

◆ __init__()

__init__ ( self,
f,
ctx )

Definition at line 6342 of file z3py.py.

6342 def __init__(self, f, ctx):
6343 self.f = f
6344 self.ctx = ctx
6345 if self.f is not None:
6346 Z3_func_interp_inc_ref(self.ctx.ref(), self.f)
6347
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 6348 of file z3py.py.

6348 def __del__(self):
6349 if self.f is not None and self.ctx.ref() is not None and Z3_func_interp_dec_ref is not None:
6350 Z3_func_interp_dec_ref(self.ctx.ref(), self.f)
6351
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 6430 of file z3py.py.

6430 def __copy__(self):
6431 return self.translate(self.ctx)
6432

◆ __deepcopy__()

__deepcopy__ ( self,
memo = {} )

Definition at line 6433 of file z3py.py.

6433 def __deepcopy__(self, memo={}):
6434 return self.translate(self.ctx)
6435

◆ __repr__()

__repr__ ( self)

Definition at line 6453 of file z3py.py.

6453 def __repr__(self):
6454 return obj_to_string(self)
6455
6456

◆ 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 6391 of file z3py.py.

6391 def arity(self):
6392 """Return the number of arguments for each entry in the function interpretation `self`.
6393
6394 >>> f = Function('f', IntSort(), IntSort())
6395 >>> s = Solver()
6396 >>> s.add(f(0) == 1, f(1) == 1, f(2) == 0)
6397 >>> s.check()
6398 sat
6399 >>> m = s.model()
6400 >>> m[f].arity()
6401 1
6402 """
6403 return int(Z3_func_interp_get_arity(self.ctx.ref(), self.f))
6404
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 6436 of file z3py.py.

6436 def as_list(self):
6437 """Return the function interpretation as a Python list.
6438 >>> f = Function('f', IntSort(), IntSort())
6439 >>> s = Solver()
6440 >>> s.add(f(0) == 1, f(1) == 1, f(2) == 0)
6441 >>> s.check()
6442 sat
6443 >>> m = s.model()
6444 >>> m[f]
6445 [2 -> 0, else -> 1]
6446 >>> m[f].as_list()
6447 [[2, 0], 1]
6448 """
6449 r = [self.entry(i).as_list() for i in range(self.num_entries())]
6450 r.append(self.else_value())
6451 return r
6452

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 6352 of file z3py.py.

6352 def else_value(self):
6353 """
6354 Return the `else` value for a function interpretation.
6355 Return None if Z3 did not specify the `else` value for
6356 this object.
6357
6358 >>> f = Function('f', IntSort(), IntSort())
6359 >>> s = Solver()
6360 >>> s.add(f(0) == 1, f(1) == 1, f(2) == 0)
6361 >>> s.check()
6362 sat
6363 >>> m = s.model()
6364 >>> m[f]
6365 [2 -> 0, else -> 1]
6366 >>> m[f].else_value()
6367 1
6368 """
6369 r = Z3_func_interp_get_else(self.ctx.ref(), self.f)
6370 if r:
6371 return _to_expr_ref(r, self.ctx)
6372 else:
6373 return None
6374
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 6405 of file z3py.py.

6405 def entry(self, idx):
6406 """Return an entry at position `idx < self.num_entries()` in the function interpretation `self`.
6407
6408 >>> f = Function('f', IntSort(), IntSort())
6409 >>> s = Solver()
6410 >>> s.add(f(0) == 1, f(1) == 1, f(2) == 0)
6411 >>> s.check()
6412 sat
6413 >>> m = s.model()
6414 >>> m[f]
6415 [2 -> 0, else -> 1]
6416 >>> m[f].num_entries()
6417 1
6418 >>> m[f].entry(0)
6419 [2, 0]
6420 """
6421 if idx >= self.num_entries():
6422 raise IndexError
6423 return FuncEntry(Z3_func_interp_get_entry(self.ctx.ref(), self.f, idx), self.ctx)
6424
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 6375 of file z3py.py.

6375 def num_entries(self):
6376 """Return the number of entries/points in the function interpretation `self`.
6377
6378 >>> f = Function('f', IntSort(), IntSort())
6379 >>> s = Solver()
6380 >>> s.add(f(0) == 1, f(1) == 1, f(2) == 0)
6381 >>> s.check()
6382 sat
6383 >>> m = s.model()
6384 >>> m[f]
6385 [2 -> 0, else -> 1]
6386 >>> m[f].num_entries()
6387 1
6388 """
6389 return int(Z3_func_interp_get_num_entries(self.ctx.ref(), self.f))
6390
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 6425 of file z3py.py.

6425 def translate(self, other_ctx):
6426 """Copy model 'self' to context 'other_ctx'.
6427 """
6428 return ModelRef(Z3_model_translate(self.ctx.ref(), self.model, other_ctx.ref()), other_ctx)
6429
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 6343 of file z3py.py.

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

◆ model