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fix #4116

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delta has to be computed based on Simplex tableau not on difference graph.
This commit is contained in:
Nikolaj Bjorner 2020-04-27 17:07:12 -07:00
parent 3a63c3751e
commit 4f462925a0
7 changed files with 91 additions and 21 deletions
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6
src/smt/theory_dense_diff_logic_def.h
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@ -985,6 +985,8 @@ namespace smt {
TRACE("opt", S.display(tout); );
SASSERT(is_sat != l_false);
lbool is_fin = S.minimize(w);
ensure_rational_solution(S);
switch (is_fin) {
case l_true: {
@ -1010,10 +1012,10 @@ namespace smt {
}
for (unsigned i = 0; i < num_nodes; ++i) {
mpq_inf const& val = S.get_value(i);
rational q(val.first), eps(val.second);
rational q(val.first);
SASSERT(rational(val.second).is_zero());
numeral a(q);
m_assignment[i] = a;
// TBD: if epsilon is != 0, then adjust a by some small fraction.
}
inf_eps result(rational(0), r);
blocker = mk_gt(v, result);