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Fix bug in realclosure::compare function

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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
This commit is contained in:
Leonardo de Moura 2013-01-06 21:50:36 -08:00
parent 3e19df0441
commit 3c1f1a3b65
3 changed files with 15 additions and 3 deletions
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6
src/math/realclosure/realclosure.cpp
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@ -2500,10 +2500,10 @@ namespace realclosure {
else if (is_nz_rational(a) && is_nz_rational(b))
return qm().lt(to_mpq(a), to_mpq(b)) ? -1 : 1;
else {
// TODO: try to refine interval before switching to sub/expensive approach
if (bqm().lt(interval(a).upper(), interval(b).lower()))
// TODO: try to refine interval before switching to sub+sign approach
if (bqim().before(interval(a), interval(b)))
return -1;
else if (bqm().lt(interval(b).upper(), interval(a).lower()))
else if (bqim().before(interval(b), interval(a)))
return 1;
else {
value_ref diff(*this);