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take into account for empty vars

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2024-12-30 11:09:35 -08:00
parent 27cb81e7e6
commit 81678923a1
1 changed files with 4 additions and 2 deletions
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6
src/ast/sls/sls_bv_lookahead.cpp
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@ -99,6 +99,8 @@ namespace sls {
* random update: select a variable at random and set bits to random values * random update: select a variable at random and set bits to random values
*/ */
bool bv_lookahead::apply_random_update(ptr_vector<expr> const& vars) { bool bv_lookahead::apply_random_update(ptr_vector<expr> const& vars) {
if (vars.empty())
return false;
expr* e = vars[ctx.rand(vars.size())]; expr* e = vars[ctx.rand(vars.size())];
auto& v = wval(e); auto& v = wval(e);
m_v_updated.set_bw(v.bw); m_v_updated.set_bw(v.bw);
@ -136,7 +138,6 @@ namespace sls {
* those with high score, but back off if they are frequently chosen. * those with high score, but back off if they are frequently chosen.
*/ */
ptr_vector<expr> const& bv_lookahead::get_candidate_uninterp() { ptr_vector<expr> const& bv_lookahead::get_candidate_uninterp() {
auto const& lits = ctx.root_literals();
app* e = nullptr; app* e = nullptr;
if (m_config.ucb) { if (m_config.ucb) {
double max = -1.0; double max = -1.0;
@ -166,10 +167,11 @@ namespace sls {
return m_empty_vars; return m_empty_vars;
auto const& vars = m_ev.terms.uninterp_occurs(e); auto const& vars = m_ev.terms.uninterp_occurs(e);
VERIFY(!vars.empty());
TRACE("bv", tout << "candidates " << mk_bounded_pp(e, m) << ": "; TRACE("bv", tout << "candidates " << mk_bounded_pp(e, m) << ": ";
for (auto e : vars) tout << mk_bounded_pp(e, m) << " "; for (auto e : vars) tout << mk_bounded_pp(e, m) << " ";
tout << "\n";); tout << "\n";);
//VERIFY(!vars.empty());
return vars; return vars;
} }