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Added function to select the next variable to split on (User-Propagator) (#6096)

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* Added function to select the next variable to split on

* Fixed typo

* Small fixes

* uint -> int
This commit is contained in:
Clemens Eisenhofer 2022-06-19 19:49:25 +02:00 • committed by GitHub
parent f08e3d70a9
commit 2fa60aa43c
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GPG key ID: 4AEE18F83AFDEB23
17 changed files with 255 additions and 104 deletions
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47
src/sat/smt/user_solver.cpp
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@ -56,6 +56,18 @@ namespace user_solver {
void solver::register_cb(expr* e) {
add_expr(e);
}
void solver::next_split_cb(expr* e, unsigned idx, lbool phase) {
if (e == nullptr) {
m_next_split_expr = nullptr;
return;
}
force_push();
ctx.internalize(e, false);
m_next_split_expr = e;
m_next_split_idx = idx;
m_next_split_phase = phase;
}
sat::check_result solver::check() {
if (!(bool)m_final_eh)
@ -72,6 +84,41 @@ namespace user_solver {
m_id2justification.setx(v, sat::literal_vector(num_lits, jlits), sat::literal_vector());
m_fixed_eh(m_user_context, this, var2expr(v), value);
}
bool solver::decide(sat::bool_var& var, lbool& phase) {
if (!m_decide_eh)
return false;
euf::enode* original_enode = bool_var2enode(var);
if (!is_attached_to_var(original_enode))
return false;
unsigned new_bit = 0; // ignored; currently no bv-support
expr* e = bool_var2expr(var);
m_decide_eh(m_user_context, this, &e, &new_bit, &phase);
euf::enode* new_enode = ctx.get_enode(e);
if (original_enode == new_enode)
return false;
var = new_enode->bool_var();
return true;
}
bool solver::get_case_split(sat::bool_var& var, lbool &phase){
if (!m_next_split_expr)
return false;
euf::enode* n = ctx.get_enode(m_next_split_expr);
var = n->bool_var();
phase = m_next_split_phase;
m_next_split_expr = nullptr;
return true;
}
void solver::asserted(sat::literal lit) {
if (!m_fixed_eh)