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generate proof justifications in theory_pb: codeplex issue 157

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2014-12-29 12:57:02 -08:00
parent d827713ce3
commit c54a19b084
4 changed files with 76 additions and 18 deletions
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32
src/ast/datatype_decl_plugin.cpp
View file

@ -521,6 +521,20 @@ func_decl * datatype_decl_plugin::mk_func_decl(decl_kind k, unsigned num_paramet
return m_manager->mk_func_decl(a_name, arity, domain, a_type, info);
}
break;
case OP_DT_UPDATE_FIELD:
if (num_parameters != 2 || arity != 2 || domain[0] != datatype) {
m_manager->raise_exception("invalid parameters for datatype field update");
return 0;
}
else {
symbol con_name = parameters[0].get_symbol();
symbol acc_name = parameters[1].get_symbol();
func_decl_info info(m_family_id, k, num_parameters, parameters);
info.m_private_parameters = true;
SASSERT(info.private_parameters());
return m_manager->mk_func_decl(symbol("update_field"), arity, domain, datatype, info);
}
default:
m_manager->raise_exception("invalid datatype operator kind");
return 0;
@ -672,6 +686,16 @@ bool datatype_decl_plugin::is_value(app * e) const {
return true;
}
void datatype_decl_plugin::get_op_names(svector<builtin_name> & op_names, symbol const & logic) {
#if 0
// disabled
if (logic == symbol::null) {
op_names.push_back(builtin_name("update_field", OP_DT_UPDATE_FIELD));
}
#endif
}
datatype_util::datatype_util(ast_manager & m):
m_manager(m),
m_family_id(m.mk_family_id("datatype")),
@ -919,9 +943,9 @@ void datatype_util::display_datatype(sort *s0, std::ostream& strm) {
todo.push_back(s0);
mark.mark(s0, true);
while (!todo.empty()) {
sort* s = todo.back();
sort* s = todo.back();
todo.pop_back();
strm << s->get_name() << " =\n";
strm << s->get_name() << " =\n";
ptr_vector<func_decl> const * cnstrs = get_datatype_constructors(s);
for (unsigned i = 0; i < cnstrs->size(); ++i) {
@ -931,14 +955,14 @@ void datatype_util::display_datatype(sort *s0, std::ostream& strm) {
ptr_vector<func_decl> const * accs = get_constructor_accessors(cns);
for (unsigned j = 0; j < accs->size(); ++j) {
func_decl* acc = (*accs)[j];
sort* s1 = acc->get_range();
sort* s1 = acc->get_range();
strm << "(" << acc->get_name() << ": " << s1->get_name() << ") ";
if (is_datatype(s1) && are_siblings(s1, s0) && !mark.is_marked(s1)) {
mark.mark(s1, true);
todo.push_back(s1);
}
}
strm << "\n";
strm << "\n";
}
}

3
src/ast/datatype_decl_plugin.h
View file

@ -32,6 +32,7 @@ enum datatype_op_kind {
OP_DT_CONSTRUCTOR,
OP_DT_RECOGNISER,
OP_DT_ACCESSOR,
OP_DT_UPDATE_FIELD,
LAST_DT_OP
};
@ -149,6 +150,8 @@ public:
virtual bool is_unique_value(app * e) const { return is_value(e); }
virtual void get_op_names(svector<builtin_name> & op_names, symbol const & logic);
private:
bool is_value_visit(expr * arg, ptr_buffer<app> & todo) const;
};

54
src/smt/theory_pb.cpp
View file

@ -321,7 +321,7 @@ namespace smt {
m_simplex.get_upper(v, last_bound);
if (m_mpq_inf_mgr.gt(bound, last_bound)) {
literal lit = m_explain_upper.get(v, null_literal);
get_context().mk_clause(~lit, ~explain, 0);
get_context().mk_clause(~lit, ~explain, justify(~lit, ~explain));
return false;
}
}
@ -341,7 +341,7 @@ namespace smt {
m_simplex.get_lower(v, last_bound);
if (m_mpq_inf_mgr.gt(last_bound, bound)) {
literal lit = m_explain_lower.get(v, null_literal);
get_context().mk_clause(~lit, ~explain, 0);
get_context().mk_clause(~lit, ~explain, justify(~lit, ~explain));
return false;
}
}
@ -358,6 +358,7 @@ namespace smt {
};
bool theory_pb::check_feasible() {
context& ctx = get_context();
lbool is_sat = m_simplex.make_feasible();
if (l_false != is_sat) {
return true;
@ -400,7 +401,10 @@ namespace smt {
m_stats.m_num_conflicts++;
justification* js = 0;
get_context().mk_clause(lits.size(), lits.c_ptr(), js, CLS_AUX_LEMMA, 0);
if (proofs_enabled()) {
js = alloc(theory_lemma_justification, get_id(), ctx, lits.size(), lits.c_ptr());
}
ctx.mk_clause(lits.size(), lits.c_ptr(), js, CLS_AUX_LEMMA, 0);
return false;
}
@ -1143,12 +1147,14 @@ namespace smt {
struct theory_pb::psort_expr {
context& ctx;
ast_manager& m;
theory_pb& th;
typedef smt::literal literal;
typedef smt::literal_vector literal_vector;
psort_expr(context& c):
psort_expr(context& c, theory_pb& th):
ctx(c),
m(c.get_manager()) {}
m(c.get_manager()),
th(th) {}
literal fresh() {
app_ref y(m);
@ -1180,7 +1186,7 @@ namespace smt {
void mk_clause(unsigned n, literal const* ls) {
literal_vector tmp(n, ls);
ctx.mk_clause(n, tmp.c_ptr(), 0, CLS_AUX, 0);
ctx.mk_clause(n, tmp.c_ptr(), th.justify(tmp), CLS_AUX, 0);
}
literal mk_false() { return false_literal; }
@ -1192,7 +1198,9 @@ namespace smt {
// for testing
literal theory_pb::assert_ge(context& ctx, unsigned k, unsigned n, literal const* xs) {
psort_expr ps(ctx);
theory_pb_params p;
theory_pb th(ctx.get_manager(), p);
psort_expr ps(ctx, th);
psort_nw<psort_expr> sort(ps);
return sort.ge(false, k, n, xs);
}
@ -1249,21 +1257,21 @@ namespace smt {
}
if (ctx.get_assignment(thl) == l_true &&
ctx.get_assign_level(thl) == ctx.get_base_level()) {
psort_expr ps(ctx);
psort_expr ps(ctx, *this);
psort_nw<psort_expr> sortnw(ps);
sortnw.m_stats.reset();
at_least_k = sortnw.ge(false, k, in.size(), in.c_ptr());
ctx.mk_clause(~thl, at_least_k, 0);
ctx.mk_clause(~thl, at_least_k, justify(~thl, at_least_k));
m_stats.m_num_compiled_vars += sortnw.m_stats.m_num_compiled_vars;
m_stats.m_num_compiled_clauses += sortnw.m_stats.m_num_compiled_clauses;
}
else {
psort_expr ps(ctx);
psort_expr ps(ctx, *this);
psort_nw<psort_expr> sortnw(ps);
sortnw.m_stats.reset();
literal at_least_k = sortnw.ge(true, k, in.size(), in.c_ptr());
ctx.mk_clause(~thl, at_least_k, 0);
ctx.mk_clause(~at_least_k, thl, 0);
ctx.mk_clause(~thl, at_least_k, justify(~thl, at_least_k));
ctx.mk_clause(~at_least_k, thl, justify(thl, ~at_least_k));
m_stats.m_num_compiled_vars += sortnw.m_stats.m_num_compiled_vars;
m_stats.m_num_compiled_clauses += sortnw.m_stats.m_num_compiled_clauses;
}
@ -1432,7 +1440,9 @@ namespace smt {
if (m_conflict_frequency == 0 || (m_conflict_frequency -1 == (c.m_num_propagations % m_conflict_frequency))) {
resolve_conflict(c);
}
if (proofs_enabled()) {
js = alloc(theory_lemma_justification, get_id(), ctx, lits.size(), lits.c_ptr());
}
ctx.mk_clause(lits.size(), lits.c_ptr(), js, CLS_AUX_LEMMA, 0);
}
@ -1739,7 +1749,7 @@ namespace smt {
for (unsigned i = 0; i < m_ineq_literals.size(); ++i) {
m_ineq_literals[i].neg();
}
ctx.mk_clause(m_ineq_literals.size(), m_ineq_literals.c_ptr(), 0, CLS_AUX_LEMMA, 0);
ctx.mk_clause(m_ineq_literals.size(), m_ineq_literals.c_ptr(), justify(m_ineq_literals), CLS_AUX_LEMMA, 0);
break;
default: {
app_ref tmp = m_lemma.to_expr(false, ctx, get_manager());
@ -1757,6 +1767,22 @@ namespace smt {
return typeid(smt::justification_proof_wrapper) == typeid(j);
}
justification* theory_pb::justify(literal l1, literal l2) {
literal lits[2] = { l1, l2 };
justification* js = 0;
if (proofs_enabled()) {
js = alloc(theory_axiom_justification, get_id(), get_context().get_region(), 2, lits);
}
return js;
}
justification* theory_pb::justify(literal_vector const& lits) {
justification* js = 0;
if (proofs_enabled()) {
js = alloc(theory_lemma_justification, get_id(), get_context(), lits.size(), lits.c_ptr());
}
return js;
}
void theory_pb::hoist_maximal_values() {
for (unsigned i = 0; i < m_lemma.size(); ++i) {

5
src/smt/theory_pb.h
View file

@ -289,6 +289,11 @@ namespace smt {
void validate_final_check(ineq& c);
void validate_assign(ineq const& c, literal_vector const& lits, literal l) const;
void validate_watch(ineq const& c) const;
bool proofs_enabled() const { return get_manager().proofs_enabled(); }
justification* justify(literal l1, literal l2);
justification* justify(literal_vector const& lits);
public:
theory_pb(ast_manager& m, theory_pb_params& p);