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wip - proof checker

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This commit is contained in:
Nikolaj Bjorner 2022-10-12 09:34:45 +02:00
parent ace727ee0f
commit a2e0646eed
3 changed files with 16 additions and 13 deletions
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14
src/sat/smt/tseitin_proof_checker.cpp
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@ -234,9 +234,15 @@ namespace tseitin {
bool proof_checker::equiv(expr* a, expr* b) {
if (a == b)
return true;
expr* x, *y, *z, *u;
if (m.is_eq(a, x, y) && m.is_eq(b, z, u))
return x == u && y == z;
return false;
if (!is_app(a) || !is_app(b))
return false;
if (to_app(a)->get_decl() != to_app(b)->get_decl())
return false;
if (!to_app(a)->get_decl()->is_commutative())
return false;
if (to_app(a)->get_num_args() != 2)
return false;
return to_app(a)->get_arg(0) == to_app(b)->get_arg(1) &&
to_app(a)->get_arg(1) == to_app(b)->get_arg(0);
}
}