Z3

from z3 import *

#定义类型
x = Int('x')
y = Int('y')
z = Int('z')
n = x+y>=3
bit = BitVec('a',32)

#创建求解器
s = Solver()

#添加约束条件
s.add(y==2*x-7)
s.add(5*x+3*y+2*z==3)
s.add(3*x+z==7)

print s.check()  #检测条件是否OK   
print s.model()  #列出求解结果
sat  #列出求解满足条件值


#公式化简
print simplify(x < y + x + 2)
print simplify(And(x + 1 >= 3, x**2 + x**2 + y**2 + 2 >= 5))

#遍历表达式
print "num args: ", n.num_args()
print "children: ", n.children()
print "1st child:", n.arg(0)
print "2nd child:", n.arg(1)
print "operator: ", n.decl()
print "op name:  ", n.decl().name()
 

 https://arabelatso.github.io/2018/06/14/Z3%20API%20in%20Python/