Z3 约束器 使用

#!/usr/bin/env python
# -*- coding: utf-8 -*-
from z3 import *
# 创建约束解析器
solver = Solver()
# 定义变量
m1 = Int("m1")
m2 = Int("m2")
m3 = Int("m3")
m4 = Int("m4")
m5 = Int("m5")
m6 = Int("m6")
m7 = Int("m7")
# 添加约束条件
# 参数前7个ascii等于0x321
solver.add(m1+m2+m3+m4+m5+m6+m7==0x321)
# 约束每个解的范围都是在可见字符串
solver.add(32<=m1)
solver.add(m1<127)
solver.add(32<=m2)
solver.add(m2<127)
solver.add(32<=m3)
solver.add(m3<127)
solver.add(32<=m4)
solver.add(m4<127)
solver.add(32<=m5)
solver.add(m5<127)
solver.add(32<=m6)
solver.add(m6<127)
solver.add(32<=m7)
solver.add(m7<127)
if solver.check() == sat:
    flag = solver.model()
    print(flag)
else:
    print("no answer")