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synth

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2023-08-08 20:39:53 -07:00
parent 90780576f1
commit 0fb7055597
2 changed files with 28 additions and 20 deletions
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46
src/sat/smt/synth_solver.cpp
View file

@ -23,16 +23,17 @@ namespace synth {
solver::~solver() {}
bool solver::synthesize(app* e) {
sat::literal solver::synthesize(app* e) {
if (e->get_num_args() == 0)
return false;
return sat::null_literal;
auto * n = expr2enode(e->get_arg(0));
expr_ref_vector repr(m);
auto get_rep = [&](euf::enode* n) { return repr.get(n->get_root_id(), nullptr); };
auto has_rep = [&](euf::enode* n) { return !!get_rep(n); };
auto set_rep = [&](euf::enode* n, expr* e) { repr.setx(n->get_root_id(), e); };
auto is_computable = [&](func_decl* f) { return true; };
euf::enode_vector todo;
@ -47,33 +48,40 @@ namespace synth {
for (auto * p : euf::enode_parents(nn)) {
if (has_rep(p))
continue;
if (all_of(euf::enode_args(p), [&](auto * ch) { return has_rep(ch); })) {
ptr_buffer<expr> args;
for (auto * ch : euf::enode_args(p))
args.push_back(get_rep(ch));
app * papp = m.mk_app(p->get_decl(), args);
set_rep(p, papp);
todo.push_back(p);
}
}
if (!is_computable(p->get_decl()))
continue;
if (!all_of(euf::enode_args(p), [&](auto * ch) { return has_rep(ch); }))
continue;
ptr_buffer<expr> args;
for (auto * ch : euf::enode_args(p))
args.push_back(get_rep(ch));
app * papp = m.mk_app(p->get_decl(), args);
set_rep(p, papp);
todo.push_back(p);
}
}
expr * sol = get_rep(n);
if (!sol)
return false;
return sat::null_literal;
sat::literal lit = eq_internalize(n->get_expr(), sol);
add_unit(~lit);
IF_VERBOSE(0, verbose_stream() << mk_pp(sol, m) << "\n");
return true;
return eq_internalize(n->get_expr(), sol);
}
// block current model using realizer by E-graph (and arithmetic)
//
sat::check_result solver::check() {
for (app* e : m_synth)
if (synthesize(e))
sat::check_result::CR_CONTINUE;
return sat::check_result::CR_DONE;
sat::literal_vector clause;
for (app* e : m_synth) {
auto lit = synthesize(e);
if (lit == sat::null_literal)
return sat::check_result::CR_GIVEUP;
clause.push_back(~lit);
}
if (clause.empty())
return sat::check_result::CR_DONE;
add_clause(clause);
return sat::check_result::CR_CONTINUE;
}
// recognize synthesis objectives here.

2
src/sat/smt/synth_solver.h
View file

@ -39,7 +39,7 @@ namespace synth {
euf::th_solver* clone(euf::solver& ctx) override;
private:
bool synthesize(app* e);
sat::literal synthesize(app* e);
ptr_vector<app> m_synth;