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 6302 of file z3py.py.

Constructor & Destructor Documentation

◆ __init__()

__init__ ( self,
f,
ctx )

Definition at line 6305 of file z3py.py.

6305 def __init__(self, f, ctx):
6306 self.f = f
6307 self.ctx = ctx
6308 if self.f is not None:
6309 Z3_func_interp_inc_ref(self.ctx.ref(), self.f)
6310
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 6311 of file z3py.py.

6311 def __del__(self):
6312 if self.f is not None and self.ctx.ref() is not None and Z3_func_interp_dec_ref is not None:
6313 Z3_func_interp_dec_ref(self.ctx.ref(), self.f)
6314
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 6393 of file z3py.py.

6393 def __copy__(self):
6394 return self.translate(self.ctx)
6395

◆ __deepcopy__()

__deepcopy__ ( self,
memo = {} )

Definition at line 6396 of file z3py.py.

6396 def __deepcopy__(self, memo={}):
6397 return self.translate(self.ctx)
6398

◆ __repr__()

__repr__ ( self)

Definition at line 6416 of file z3py.py.

6416 def __repr__(self):
6417 return obj_to_string(self)
6418
6419

◆ 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 6354 of file z3py.py.

6354 def arity(self):
6355 """Return the number of arguments for each entry in the function interpretation `self`.
6356
6357 >>> f = Function('f', IntSort(), IntSort())
6358 >>> s = Solver()
6359 >>> s.add(f(0) == 1, f(1) == 1, f(2) == 0)
6360 >>> s.check()
6361 sat
6362 >>> m = s.model()
6363 >>> m[f].arity()
6364 1
6365 """
6366 return int(Z3_func_interp_get_arity(self.ctx.ref(), self.f))
6367
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 6399 of file z3py.py.

6399 def as_list(self):
6400 """Return the function interpretation as a Python list.
6401 >>> f = Function('f', IntSort(), IntSort())
6402 >>> s = Solver()
6403 >>> s.add(f(0) == 1, f(1) == 1, f(2) == 0)
6404 >>> s.check()
6405 sat
6406 >>> m = s.model()
6407 >>> m[f]
6408 [2 -> 0, else -> 1]
6409 >>> m[f].as_list()
6410 [[2, 0], 1]
6411 """
6412 r = [self.entry(i).as_list() for i in range(self.num_entries())]
6413 r.append(self.else_value())
6414 return r
6415

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 6315 of file z3py.py.

6315 def else_value(self):
6316 """
6317 Return the `else` value for a function interpretation.
6318 Return None if Z3 did not specify the `else` value for
6319 this object.
6320
6321 >>> f = Function('f', IntSort(), IntSort())
6322 >>> s = Solver()
6323 >>> s.add(f(0) == 1, f(1) == 1, f(2) == 0)
6324 >>> s.check()
6325 sat
6326 >>> m = s.model()
6327 >>> m[f]
6328 [2 -> 0, else -> 1]
6329 >>> m[f].else_value()
6330 1
6331 """
6332 r = Z3_func_interp_get_else(self.ctx.ref(), self.f)
6333 if r:
6334 return _to_expr_ref(r, self.ctx)
6335 else:
6336 return None
6337
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 6368 of file z3py.py.

6368 def entry(self, idx):
6369 """Return an entry at position `idx < self.num_entries()` in the function interpretation `self`.
6370
6371 >>> f = Function('f', IntSort(), IntSort())
6372 >>> s = Solver()
6373 >>> s.add(f(0) == 1, f(1) == 1, f(2) == 0)
6374 >>> s.check()
6375 sat
6376 >>> m = s.model()
6377 >>> m[f]
6378 [2 -> 0, else -> 1]
6379 >>> m[f].num_entries()
6380 1
6381 >>> m[f].entry(0)
6382 [2, 0]
6383 """
6384 if idx >= self.num_entries():
6385 raise IndexError
6386 return FuncEntry(Z3_func_interp_get_entry(self.ctx.ref(), self.f, idx), self.ctx)
6387
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 6338 of file z3py.py.

6338 def num_entries(self):
6339 """Return the number of entries/points in the function interpretation `self`.
6340
6341 >>> f = Function('f', IntSort(), IntSort())
6342 >>> s = Solver()
6343 >>> s.add(f(0) == 1, f(1) == 1, f(2) == 0)
6344 >>> s.check()
6345 sat
6346 >>> m = s.model()
6347 >>> m[f]
6348 [2 -> 0, else -> 1]
6349 >>> m[f].num_entries()
6350 1
6351 """
6352 return int(Z3_func_interp_get_num_entries(self.ctx.ref(), self.f))
6353
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 6388 of file z3py.py.

6388 def translate(self, other_ctx):
6389 """Copy model 'self' to context 'other_ctx'.
6390 """
6391 return ModelRef(Z3_model_translate(self.ctx.ref(), self.model, other_ctx.ref()), other_ctx)
6392
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 6306 of file z3py.py.

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

◆ model