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update Bool rewriter to pull negations up
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@ -721,9 +721,18 @@ br_status bool_rewriter::mk_eq_core(expr * lhs, expr * rhs, expr_ref & result) {
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result = m().mk_false();
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return BR_DONE;
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}
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if (m().is_not(rhs))
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std::swap(lhs, rhs);
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if (m().is_not(lhs, lhs)) {
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result = m().mk_not(m().mk_eq(lhs, rhs));
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return BR_REWRITE2;
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}
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if (unfolded) {
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result = mk_eq(lhs, rhs);
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return BR_DONE;
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return BR_REWRITE1;
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}
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expr *la, *lb, *ra, *rb;
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