Z3 python - Return 约束成立

Question

我创建了 bool xs 列表，其中之一是 True

# b is a random number
xs= [Bool("xs{i}".format(i)) for i in range(0,b)]
# only one is True
s.add(PbEq([(x,1) for x in xs], 1))
if s.check() == sat:
m = s.model()

我怎样才能 return 只包含 True 值的约束？我将其处理为字符串列表。但是，我认为转换为不合逻辑的字符串列表。

Answer 1

您可以遍历 xs 并计算：

from z3 import *

b = 10
xs = [Bool("xs_%d" % i) for i in range(0,b)]

s = Solver()
s.add(PbEq([(x,1) for x in xs], 1))

if s.check() == sat:
   m = s.model()
   for x in xs:
       if(m.eval(x)):
           print("%s is true" % x)
       else:
           print("%s is false" % x)

当我运行这个时，它打印：

xs_0 is true
xs_1 is false
xs_2 is false
xs_3 is false
xs_4 is false
xs_5 is false
xs_6 is false
xs_7 is false
xs_8 is false
xs_9 is false

Z3 python - Return 约束成立

Z3 python - Return constraint that holds True

python

python-3.x

z3

z3py