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bv and gc of literals (#4692)

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* bv and gc of literals

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* overload

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* diseq

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* diseq

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2020-09-17 14:24:07 -07:00 • committed by GitHub
parent 2d52367368
commit 549753845e
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GPG key ID: 4AEE18F83AFDEB23
34 changed files with 1480 additions and 854 deletions
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26
src/sat/dimacs.cpp
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@ -235,12 +235,15 @@ namespace dimacs {
skip_whitespace(in);
switch (*in) {
case EOF:
return false;
return false;
case 'c':
// parse comment line
case 'p':
// parse meta-data information
skip_line(in);
goto loop;
case 'i':
// parse input clause
++in;
skip_whitespace(in);
read_clause(in, err, m_record.m_lits);
@ -248,6 +251,7 @@ namespace dimacs {
m_record.m_status = sat::status::input();
break;
case 'a':
// parse non-redundant theory clause
++in;
skip_whitespace(in);
theory_id = read_theory_id();
@ -256,16 +260,32 @@ namespace dimacs {
m_record.m_tag = drat_record::tag_t::is_clause;
m_record.m_status = sat::status::th(false, theory_id);
break;
case 'g':
// parse garbage collected Boolean variable
++in;
skip_whitespace(in);
b = parse_int(in, err);
e = parse_int(in, err);
if (e != 0 || b <= 0)
throw lex_error();
m_record.m_tag = drat_record::tag_t::is_var_gc;
m_record.m_node_id = b;
break;
case 'e':
// parse expression definition
parse_ast(drat_record::tag_t::is_node);
break;
case 'f':
// parse function declaration
parse_ast(drat_record::tag_t::is_decl);
break;
case 's':
// parse sort declaration (not used)
parse_ast(drat_record::tag_t::is_sort);
break;
case 'b':
// parse bridge between Boolean variable identifier b
// and expression identifier e, which is of type Bool
++in;
skip_whitespace(in);
b = parse_int(in, err);
@ -279,6 +299,7 @@ namespace dimacs {
m_record.m_args.push_back(n);
break;
case 'd':
// parse clause deletion
++in;
skip_whitespace(in);
read_clause(in, err, m_record.m_lits);
@ -286,6 +307,8 @@ namespace dimacs {
m_record.m_status = sat::status::deleted();
break;
case 'r':
// parse redundant theory clause
// the clause must be DRUP redundant modulo T
++in;
skip_whitespace(in);
theory_id = read_theory_id();
@ -294,6 +317,7 @@ namespace dimacs {
m_record.m_status = sat::status::th(true, theory_id);
break;
default:
// parse clause redundant modulo DRAT (or mostly just DRUP)
read_clause(in, err, m_record.m_lits);
m_record.m_tag = drat_record::tag_t::is_clause;
m_record.m_status = sat::status::redundant();