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Revert unsound NaN constraints in theory_fpa (#6993)
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@ -253,18 +253,6 @@ namespace smt {
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return true;
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}
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void theory_fpa::mk_bv_nan(sort * s, expr_ref & result) {
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SASSERT(m_fpa_util.is_float(s));
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unsigned sbits = m_fpa_util.get_sbits(s);
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unsigned ebits = m_fpa_util.get_ebits(s);
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expr_ref exp(m), sgn(m), sig(m);
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exp = m_bv_util.mk_numeral(m_fpa_util.fm().m_powers2.m1(ebits), ebits);
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sgn = m_bv_util.mk_numeral(0, 1);
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sig = m_bv_util.mk_numeral(1, sbits - 1);
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expr * args[3] = {sgn, exp, sig};
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result = m_bv_util.mk_concat(3, args);
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}
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bool theory_fpa::internalize_term(app * term) {
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TRACE("t_fpa_internalize", tout << "internalizing term: " << mk_ismt2_pp(term, m) << "\n";);
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SASSERT(term->get_family_id() == get_family_id());
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@ -298,22 +286,6 @@ namespace smt {
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default: /* ignore */;
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}
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expr * owner = e->get_expr();
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sort * s = owner->get_sort();
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if (m_fpa_util.is_float(s))
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{
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TRACE("t_fpa", tout << "extra nan constraint for: " << mk_ismt2_pp(owner, m) << "\n";);
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expr_ref wrapped(m), is_nan(m), bv_nan(m);
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app_ref impl(m);
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wrapped = m_converter.wrap(owner);
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is_nan = m_fpa_util.mk_is_nan(owner);
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mk_bv_nan(s, bv_nan);
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impl = m.mk_or(m.mk_and(is_nan, m.mk_eq(wrapped, bv_nan)),
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m.mk_and(m.mk_not(is_nan), m.mk_not(m.mk_eq(wrapped, bv_nan))));
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assert_cnstr(impl);
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assert_cnstr(mk_side_conditions());
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}
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if (!ctx.relevancy())
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relevant_eh(term);
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}
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@ -124,8 +124,6 @@ namespace smt {
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enode* ensure_enode(expr* e);
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enode* get_root(expr* a) { return ensure_enode(a)->get_root(); }
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app* get_ite_value(expr* e);
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void mk_bv_nan(sort * s, expr_ref & result);
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};
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};
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