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fix #6671

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This commit is contained in:
Nikolaj Bjorner 2023-04-08 16:39:40 -07:00
parent 7b513b4a40
commit ccb250c32b
1 changed files with 14 additions and 0 deletions
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14
src/smt/theory_lra.cpp
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@ -1138,6 +1138,17 @@ public:
expr_ref zero(a.mk_real(0), m);
mk_axiom(~mk_literal(a.mk_le(p, zero)));
}
bool can_be_underspecified = false;
if (a.is_numeral(x, r) && r == 0 && (!a.is_numeral(y, r) || r == 0))
can_be_underspecified = true;
if (!a.is_extended_numeral(x, r) &&
!a.is_extended_numeral(y, r))
can_be_underspecified = true;
if (can_be_underspecified) {
literal lit = th.mk_eq(p, a.mk_power0(x, y), false);
ctx().mark_as_relevant(lit);
ctx().assign(lit, nullptr);
}
}
// n < 0 || rem(a, n) = mod(a, n)
@ -1622,6 +1633,8 @@ public:
final_check_status eval_unsupported(expr* e) {
if (a.is_power(e))
return eval_power(e);
if (a.is_power0(e))
return FC_DONE;
return FC_GIVEUP;
}
@ -1681,6 +1694,7 @@ public:
st = FC_CONTINUE;
break;
case FC_GIVEUP:
TRACE("arith", tout << "give up " << mk_pp(e, m) << "\n");
if (st != FC_CONTINUE)
st = FC_GIVEUP;
break;