mirrors/z3
3
0
Fork 0
mirror of https://github.com/Z3Prover/z3 synced 2025-04-28 19:35:50 +00:00
Code Activity

working on supporting multiple max-sat objectives

Browse source 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2013-11-08 16:54:34 -08:00
parent f350efffc7
commit 9f53a4aa18
7 changed files with 65 additions and 23 deletions
Download patch file Download diff file Expand all files Collapse all files

38
src/opt/opt_context.cpp
View file

@ -32,14 +32,29 @@ namespace opt {
context::context(ast_manager& m):
m(m),
m_hard_constraints(m),
m_optsmt(m),
m_maxsmt(m)
m_optsmt(m)
{
m_params.set_bool("model", true);
m_params.set_bool("unsat_core", true);
m_solver = alloc(opt_solver, m, m_params, symbol());
}
context::~context() {
map_t::iterator it = m_maxsmts.begin(), end = m_maxsmts.end();
for (; it != end; ++it) {
dealloc(it->m_value);
}
}
void context::add_soft_constraint(expr* f, rational const& w, symbol const& id) {
maxsmt* ms;
if (!m_maxsmts.find(id, ms)) {
ms = alloc(maxsmt, m);
m_maxsmts.insert(id, ms);
}
ms->add(f, w);
}
void context::optimize() {
opt_solver& s = *m_solver.get();
@ -48,8 +63,13 @@ namespace opt {
for (unsigned i = 0; i < m_hard_constraints.size(); ++i) {
s.assert_expr(m_hard_constraints[i].get());
}
lbool is_sat = m_maxsmt(s);
lbool is_sat = l_true;
map_t::iterator it = m_maxsmts.begin(), end = m_maxsmts.end();
for (; is_sat == l_true && it != end; ++it) {
maxsmt* ms = it->m_value;
is_sat = (*ms)(s);
}
if (is_sat == l_true) {
is_sat = m_optsmt(s);
}
@ -60,7 +80,10 @@ namespace opt {
m_solver->set_cancel(f);
}
m_optsmt.set_cancel(f);
m_maxsmt.set_cancel(f);
map_t::iterator it = m_maxsmts.begin(), end = m_maxsmts.end();
for (; it != end; ++it) {
it->m_value->set_cancel(f);
}
}
void context::collect_statistics(statistics& stats) {
@ -79,7 +102,10 @@ namespace opt {
m_solver->updt_params(m_params);
}
m_optsmt.updt_params(m_params);
m_maxsmt.updt_params(m_params);
map_t::iterator it = m_maxsmts.begin(), end = m_maxsmts.end();
for (; it != end; ++it) {
it->m_value->updt_params(m_params);
}
}