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working on pb

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2013-11-18 21:51:56 -08:00
parent 475072f5da
commit efecb9b6c0
2 changed files with 25 additions and 14 deletions
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37
src/smt/theory_pb.cpp
View file

@ -545,7 +545,7 @@ namespace smt {
if (maxsum < c.k()) {
literal_vector& lits = get_unhelpful_literals(c, false);
lits.push_back(~c.lit());
add_clause(c, c.lit(), lits);
add_clause(c, ~c.lit(), lits);
}
else {
c.m_max_sum = 0;
@ -598,7 +598,7 @@ namespace smt {
//
literal_vector& lits = get_unhelpful_literals(c, false);
lits.push_back(~c.lit());
add_clause(c, literal(v, !is_true), lits);
add_clause(c, ~literal(v, !is_true), lits);
}
else {
del_watch(watch, watch_index, c, w);
@ -892,7 +892,7 @@ namespace smt {
}
}
std::ostream& theory_pb::display(std::ostream& out, ineq& c) const {
std::ostream& theory_pb::display(std::ostream& out, ineq& c, bool values) const {
ast_manager& m = get_manager();
context& ctx = get_context();
out << c.lit() << " ";
@ -902,7 +902,15 @@ namespace smt {
out << tmp << "\n";
}
for (unsigned i = 0; i < c.size(); ++i) {
out << c.coeff(i) << "*" << c.lit(i);
literal l(c.lit(i));
out << c.coeff(i) << "*" << l;
if (values) {
out << "@(" << ctx.get_assignment(l);
if (ctx.get_assignment(l) != l_undef) {
out << ":" << ctx.get_assign_level(l);
}
out << ")";
}
if (i + 1 < c.size()) {
out << " + ";
}
@ -943,7 +951,7 @@ namespace smt {
tout << lits[i] << " ";
}
tout << "=> " << l << "\n";
display(tout, c););
display(tout, c, true););
ctx.assign(l, ctx.mk_justification(
pb_justification(
@ -961,7 +969,7 @@ namespace smt {
tout << lits[i] << " ";
}
tout << "\n";
display(tout, c););
display(tout, c, true););
DEBUG_CODE(
if (s_debug_conflict) {
@ -1016,19 +1024,22 @@ namespace smt {
//
void theory_pb::resolve_conflict(literal conseq, ineq& c) {
IF_VERBOSE(0, display(verbose_stream(), c););
IF_VERBOSE(0, verbose_stream() << conseq << "\n"; display(verbose_stream(), c, true););
bool_var v;
context& ctx = get_context();
unsigned& lvl = m_conflict_lvl = ctx.get_assign_level(c.lit());
unsigned& lvl = m_conflict_lvl = 0;
bool found = false;
for (unsigned i = 0; i < c.size(); ++i) {
v = c.lit(i).var();
if (ctx.get_assignment(v) != l_undef) {
IF_VERBOSE(0, verbose_stream() << c.lit(i) << " "
<< ctx.get_assign_level(v) << "\n";);
lvl = std::max(lvl, ctx.get_assign_level(v));
if (ctx.get_assignment(c.lit(i)) == l_false) {
lvl = std::max(lvl, ctx.get_assign_level(c.lit(i)));
}
found = found || (~conseq == c.lit(i));
}
SASSERT(lvl >= ctx.get_assign_level(c.lit()));
SASSERT(ctx.get_assignment(conseq) == l_true);
SASSERT(found); // conseq is negative in c
if (lvl == ctx.get_base_level()) {
return;

2
src/smt/theory_pb.h
View file

@ -116,7 +116,7 @@ namespace smt {
bool assign_watch(bool_var v, bool is_true, watch_list& watch, unsigned index);
void assign_ineq(ineq& c, bool is_true);
std::ostream& display(std::ostream& out, ineq& c) const;
std::ostream& display(std::ostream& out, ineq& c, bool values = false) const;
virtual void display(std::ostream& out) const;
void add_clause(ineq& c, literal conseq, literal_vector const& lits);