8000 Disabling mbqi for pattern-based formula in Python doesn't seem work · Issue #7630 · Z3Prover/z3 · GitHub
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Disabling mbqi for pattern-based formula in Python doesn't seem work #7630

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RabbitWhite1 opened this issue Apr 23, 2025 · 0 comments
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Disabling mbqi for pattern-based formula in Python doesn't seem work #7630

RabbitWhite1 opened this issue Apr 23, 2025 · 0 comments

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@RabbitWhite1
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Hi, I am new to the pattern feature of z3. I followed the example from here

f = Function('f', IntSort(), IntSort())
g = Function('g', IntSort(), IntSort())
a, b, c = Ints('a b c')
x = Int('x')

s = Solver()
s.set(auto_config=False, mbqi=False)

s.add( ForAll(x, f(g(x)) == x, patterns = [f(g(x))]),
       g(a) == c,
       g(b) == c,
       a != b )

# Display solver state using internal format
print (s.sexpr())
print (s.check())

Since it disabled auto_config and mbqi, it is supposed to output unknown since the pattern f(g(x)) doesn't exist. But the result is unsat in my end.

I wonder if there is any other configuration I need to setup for this?
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