动态网络中检查信念的Z3Py示例

from z3 import *

# 创建Z3求解器
solver = Solver()

# 定义节点和边
nodes = ['A', 'B', 'C']
edges = [('A', 'B'), ('B', 'C')]

# 定义节点之间的关系
relation = Function('relation', StringSort(), StringSort(), BoolSort())

# 添加节点之间的关系约束
for edge in edges:
    solver.add(relation(edge[0], edge[1]))

# 定义信念函数
belief = Function('belief', StringSort(), BoolSort())

# 添加信念约束
solver.add(ForAll([n], Implies(belief(n), Or([relation(n, m) for m in nodes]))))

# 检查是否存在满足信念的解
if solver.check() == sat:
    model = solver.model()
    for n in nodes:
        if is_true(model.eval(belief(n))):
            print(n + "的信念为真")
        else:
            print(n + "的信念为假")
else:
    print("不存在满足信念的解")