def walk_symbol(self, formula, **kwargs):
symbol_type = formula.symbol_type()
if symbol_type.is_function_type():
res = self._z3_func_decl(formula)
else:
sname = formula.symbol_name()
z3_sname = z3.Z3_mk_string_symbol(self.ctx.ref(), sname)
if symbol_type.is_bool_type():
sort_ast = self.z3BoolSort.ast
elif symbol_type.is_real_type():
sort_ast = self.z3RealSort.ast
elif symbol_type.is_int_type():
sort_ast = self.z3IntSort.ast
elif symbol_type.is_array_type():
sort_ast = self._type_to_z3(symbol_type).ast
elif symbol_type.is_string_type():
raise ConvertExpressionError(message=("Unsupported string symbol: %s" %
str(formula)),
expression=formula)
elif symbol_type.is_enum_type():
sort_ast = self._type_to_z3(symbol_type).ast
elif symbol_type.is_custom_type():
sort_ast = self._type_to_z3(symbol_type).ast
else:
sort_ast = self._type_to_z3(symbol_type).ast
# Create const with given sort
res = z3.Z3_mk_const(self.ctx.ref(), z3_sname, sort_ast)
z3.Z3_inc_ref(self.ctx.ref(), res)
return res
def Sequence(name, ctx=None):
"""Return a sequence constant named `name`. If `ctx=None`, then the global context is used.
>>> x = Sequence('x')
"""
ctx = z3.get_ctx(ctx)
int_sort = z3.IntSort(ctx)
return z3.SeqRef(
z3.Z3_mk_const(
ctx.ref(), z3.to_symbol(name, ctx),
z3.SeqSortRef(z3.Z3_mk_seq_sort(int_sort.ctx_ref(),
int_sort.ast)).ast), ctx)
def walk_symbol(self, formula, **kwargs):
symbol_type = formula.symbol_type()
sname = formula.symbol_name()
z3_sname = z3.Z3_mk_string_symbol(self.ctx.ref(), sname)
if symbol_type.is_bool_type():
sort_ast = self.z3BoolSort.ast
elif symbol_type.is_real_type():
sort_ast = self.z3RealSort.ast
elif symbol_type.is_int_type():
sort_ast = self.z3IntSort.ast
else:
sort_ast = self._type_to_z3(symbol_type).ast
# Create const with given sort
res = z3.Z3_mk_const(self.ctx.ref(), z3_sname, sort_ast)
z3.Z3_inc_ref(self.ctx.ref(), res)
return res
