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Skip try_parity for x==y and y==x

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This commit is contained in:
Jakob Rath 2022-12-07 16:09:10 +01:00
parent 85715eb164
commit 05a1f4d096
1 changed files with 4 additions and 0 deletions
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4
src/math/polysat/saturation.cpp
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@ -644,6 +644,10 @@ namespace polysat {
pdd X = s.var(x);
if (!is_AxB_eq_0(x, axb_l_y, a, b, y))
return false;
if (a.is_max() && b.is_var()) // x == y, we propagate values in each direction and don't need a lemma
return false;
if (a.is_one() && (-b).is_var()) // y == x
return false;
signed_constraint b_is_odd = s.odd(b);
signed_constraint a_is_odd = s.odd(a);
signed_constraint x_is_odd = s.odd(X);