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prep for pragmas

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This commit is contained in:
Nikolaj Bjorner 2022-05-09 11:18:15 -07:00
parent 6670cf0b65
commit dcc01b874a
10 changed files with 124 additions and 78 deletions
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27
src/sat/dimacs.cpp
View file

@ -112,6 +112,27 @@ static void read_clause(Buffer & in, std::ostream& err, sat::literal_vector & li
}
}
template<typename Buffer>
static void read_pragma(Buffer & in, std::ostream& err, std::string& p) {
skip_whitespace(in);
if (*in != 'p')
return;
++in;
while (*in == ' ')
++in;
while (true) {
if (*in == EOF)
return;
if (*in == '\n') {
++in;
return;
}
p.push_back(*in);
++in;
}
}
template<typename Buffer>
static bool parse_dimacs_core(Buffer & in, std::ostream& err, sat::solver & solver) {
sat::literal_vector lits;
@ -156,7 +177,9 @@ namespace dimacs {
sat::status_pp pp(r.m_status, p.th);
switch (r.m_tag) {
case drat_record::tag_t::is_clause:
return out << pp << " " << r.m_lits << " 0\n";
if (!r.m_pragma.empty())
return out << pp << " " << r.m_lits << " 0 p " << r.m_pragma << "\n";
return out << pp << " " << r.m_lits << " 0\n";
case drat_record::tag_t::is_node:
return out << "e " << r.m_node_id << " " << r.m_name << " " << r.m_args << "0\n";
case drat_record::tag_t::is_sort:
@ -280,6 +303,7 @@ namespace dimacs {
try {
loop:
skip_whitespace(in);
m_record.m_pragma.clear();
switch (*in) {
case EOF:
return false;
@ -304,6 +328,7 @@ namespace dimacs {
theory_id = read_theory_id();
skip_whitespace(in);
read_clause(in, err, m_record.m_lits);
read_pragma(in, err, m_record.m_pragma);
m_record.m_tag = drat_record::tag_t::is_clause;
m_record.m_status = sat::status::th(false, theory_id);
break;

5
src/sat/dimacs.h
View file

@ -59,10 +59,11 @@ namespace dimacs {
// a node populates m_node_id, m_name, m_args
// a bool def populates m_node_id and one element in m_args
sat::literal_vector m_lits;
sat::status m_status{ sat::status::redundant() };
unsigned m_node_id{ 0 };
sat::status m_status = sat::status::redundant();
unsigned m_node_id = 0;
std::string m_name;
unsigned_vector m_args;
std::string m_pragma;
};
struct drat_pp {

8
src/sat/sat_drat.cpp
View file

@ -137,6 +137,14 @@ namespace sat {
}
}
buffer[len++] = '0';
if (st.get_pragma()) {
buffer[len++] = ' ';
buffer[len++] = 'p';
buffer[len++] = ' ';
char const* ps = st.get_pragma();
while (*ps)
buffer[len++] = *ps++;
}
buffer[len++] = '\n';
m_out->write(buffer, len);

10
src/sat/sat_types.h
View file

@ -98,22 +98,24 @@ namespace sat {
enum class st { input, asserted, redundant, deleted };
st m_st;
int m_orig;
char const* m_pragma;
public:
status(st s, int o) : m_st(s), m_orig(o) {};
status(status const& s) : m_st(s.m_st), m_orig(s.m_orig) {}
status(status&& s) noexcept { m_st = st::asserted; m_orig = -1; std::swap(m_st, s.m_st); std::swap(m_orig, s.m_orig); }
status(st s, int o, char const* ps = nullptr) : m_st(s), m_orig(o), m_pragma(ps) {};
status(status const& s) : m_st(s.m_st), m_orig(s.m_orig), m_pragma(s.m_pragma) {}
status(status&& s) noexcept { m_st = st::asserted; m_orig = -1; std::swap(m_st, s.m_st); std::swap(m_orig, s.m_orig); std::swap(m_pragma, s.m_pragma); }
status& operator=(status const& other) { m_st = other.m_st; m_orig = other.m_orig; return *this; }
static status redundant() { return status(status::st::redundant, -1); }
static status asserted() { return status(status::st::asserted, -1); }
static status deleted() { return status(status::st::deleted, -1); }
static status input() { return status(status::st::input, -1); }
static status th(bool redundant, int id) { return status(redundant ? st::redundant : st::asserted, id); }
static status th(bool redundant, int id, char const* ps = nullptr) { return status(redundant ? st::redundant : st::asserted, id, ps); }
bool is_input() const { return st::input == m_st; }
bool is_redundant() const { return st::redundant == m_st; }
bool is_asserted() const { return st::asserted == m_st; }
bool is_deleted() const { return st::deleted == m_st; }
char const* get_pragma() const { return m_pragma; }
bool is_sat() const { return -1 == m_orig; }
int get_th() const { return m_orig; }

23
src/sat/smt/arith_axioms.cpp
View file

@ -233,45 +233,46 @@ namespace arith {
SASSERT(b1.get_var() == b2.get_var());
if (k1 == k2 && kind1 == kind2) return;
SASSERT(k1 != k2 || kind1 != kind2);
char const* bound_params = "farkas 1 1";
if (kind1 == lp_api::lower_t) {
if (kind2 == lp_api::lower_t) {
if (k2 <= k1)
add_clause(~l1, l2);
add_clause(~l1, l2, bound_params);
else
add_clause(l1, ~l2);
add_clause(l1, ~l2, bound_params);
}
else if (k1 <= k2)
// k1 <= k2, k1 <= x or x <= k2
add_clause(l1, l2);
else {
// k1 > hi_inf, k1 <= x => ~(x <= hi_inf)
add_clause(~l1, ~l2);
add_clause(~l1, ~l2, bound_params);
if (v_is_int && k1 == k2 + rational(1))
// k1 <= x or x <= k1-1
add_clause(l1, l2);
add_clause(l1, l2, bound_params);
}
}
else if (kind2 == lp_api::lower_t) {
if (k1 >= k2)
// k1 >= lo_inf, k1 >= x or lo_inf <= x
add_clause(l1, l2);
add_clause(l1, l2, bound_params);
else {
// k1 < k2, k2 <= x => ~(x <= k1)
add_clause(~l1, ~l2);
add_clause(~l1, ~l2, bound_params);
if (v_is_int && k1 == k2 - rational(1))
// x <= k1 or k1+l <= x
add_clause(l1, l2);
add_clause(l1, l2, bound_params);
}
}
else {
// kind1 == A_UPPER, kind2 == A_UPPER
if (k1 >= k2)
// k1 >= k2, x <= k2 => x <= k1
add_clause(l1, ~l2);
add_clause(l1, ~l2, bound_params);
else
// k1 <= hi_sup , x <= k1 => x <= hi_sup
add_clause(~l1, l2);
add_clause(~l1, l2, bound_params);
}
}
@ -498,8 +499,8 @@ namespace arith {
if (x->get_root() == y->get_root())
return;
reset_evidence();
set_evidence(ci1, m_core, m_eqs);
set_evidence(ci2, m_core, m_eqs);
set_evidence(ci1);
set_evidence(ci2);
++m_stats.m_fixed_eqs;
auto* jst = euf::th_explain::propagate(*this, m_core, m_eqs, x, y);
ctx.propagate(x, y, jst->to_index());

47
src/sat/smt/arith_solver.cpp
View file

@ -194,11 +194,8 @@ namespace arith {
++m_stats.m_bound_propagations2;
reset_evidence();
m_core.push_back(lit1);
m_params.push_back(parameter(m_farkas));
m_params.push_back(parameter(rational(1)));
m_params.push_back(parameter(rational(1)));
TRACE("arith", tout << lit2 << " <- " << m_core << "\n";);
assign(lit2, m_core, m_eqs, m_params);
assign(lit2, m_core, m_eqs, "farkas 1 1");
++m_stats.m_bounds_propagations;
}
@ -239,13 +236,11 @@ namespace arith {
bool first = true;
for (unsigned i = 0; i < bounds.size(); ++i) {
api_bound* b = bounds[i];
if (s().value(b->get_lit()) != l_undef) {
if (s().value(b->get_lit()) != l_undef)
continue;
}
literal lit = is_bound_implied(be.kind(), be.m_bound, *b);
if (lit == sat::null_literal) {
if (lit == sat::null_literal)
continue;
}
TRACE("arith", tout << lit << " bound: " << *b << " first: " << first << "\n";);
lp().settings().stats().m_num_of_implied_bounds++;
@ -260,7 +255,7 @@ namespace arith {
TRACE("arith", for (auto lit : m_core) tout << lit << ": " << s().value(lit) << "\n";);
DEBUG_CODE(for (auto lit : m_core) { VERIFY(s().value(lit) == l_true); });
++m_stats.m_bound_propagations1;
assign(lit, m_core, m_eqs, m_params);
assign(lit, m_core, m_eqs, "bounds");
}
if (should_refine_bounds() && first)
@ -297,7 +292,7 @@ namespace arith {
void solver::consume(rational const& v, lp::constraint_index j) {
set_evidence(j, m_core, m_eqs);
set_evidence(j);
m_explanation.add_pair(j, v);
}
@ -318,7 +313,7 @@ namespace arith {
return false;
reset_evidence();
for (auto ev : e)
set_evidence(ev.ci(), m_core, m_eqs);
set_evidence(ev.ci());
auto* jst = euf::th_explain::propagate(*this, m_core, m_eqs, n1, n2);
ctx.propagate(n1, n2, jst->to_index());
return true;
@ -375,7 +370,7 @@ namespace arith {
reset_evidence();
m_explanation.clear();
lp().explain_implied_bound(be, m_bp);
assign(bound, m_core, m_eqs, m_params);
assign(bound, m_core, m_eqs, nullptr);
}
@ -748,10 +743,10 @@ namespace arith {
++m_stats.m_fixed_eqs;
reset_evidence();
set_evidence(ci1, m_core, m_eqs);
set_evidence(ci2, m_core, m_eqs);
set_evidence(ci3, m_core, m_eqs);
set_evidence(ci4, m_core, m_eqs);
set_evidence(ci1);
set_evidence(ci2);
set_evidence(ci3);
set_evidence(ci4);
enode* x = var2enode(v1);
enode* y = var2enode(v2);
auto* jst = euf::th_explain::propagate(*this, m_core, m_eqs, x, y);
@ -1161,13 +1156,13 @@ namespace arith {
// m_explanation implies term <= k
reset_evidence();
for (auto ev : m_explanation)
set_evidence(ev.ci(), m_core, m_eqs);
set_evidence(ev.ci());
// The call mk_bound() can set the m_infeasible_column in lar_solver
// so the explanation is safer to take before this call.
app_ref b = mk_bound(m_lia->get_term(), m_lia->get_offset(), !m_lia->is_upper());
IF_VERBOSE(4, verbose_stream() << "cut " << b << "\n");
literal lit = expr2literal(b);
assign(lit, m_core, m_eqs, m_params);
assign(lit, m_core, m_eqs, nullptr);
lia_check = l_false;
break;
}
@ -1189,20 +1184,16 @@ namespace arith {
return lia_check;
}
void solver::assign(literal lit, literal_vector const& core, svector<enode_pair> const& eqs, vector<parameter> const& params) {
std::cout << "assign: ";
for (auto const& p : params)
std::cout << p << " ";
std::cout << "\n";
void solver::assign(literal lit, literal_vector const& core, svector<enode_pair> const& eqs, char const* pma) {
if (core.size() < small_lemma_size() && eqs.empty()) {
m_core2.reset();
for (auto const& c : core)
m_core2.push_back(~c);
m_core2.push_back(lit);
add_clause(m_core2);
add_clause(m_core2, pma);
}
else {
auto* jst = euf::th_explain::propagate(*this, core, eqs, lit);
auto* jst = euf::th_explain::propagate(*this, core, eqs, lit, pma);
ctx.propagate(lit, jst->to_index());
}
}
@ -1225,7 +1216,7 @@ namespace arith {
++m_num_conflicts;
++m_stats.m_conflicts;
for (auto ev : m_explanation)
set_evidence(ev.ci(), m_core, m_eqs);
set_evidence(ev.ci());
TRACE("arith",
tout << "Lemma - " << (is_conflict ? "conflict" : "propagation") << "\n";
for (literal c : m_core) tout << literal2expr(c) << "\n";
@ -1247,7 +1238,7 @@ namespace arith {
return lp().get_status() == lp::lp_status::INFEASIBLE;
}
void solver::set_evidence(lp::constraint_index idx, literal_vector& core, svector<enode_pair>& eqs) {
void solver::set_evidence(lp::constraint_index idx) {
if (idx == UINT_MAX) {
return;
}
@ -1255,7 +1246,7 @@ namespace arith {
case inequality_source: {
literal lit = m_inequalities[idx];
SASSERT(lit != sat::null_literal);
core.push_back(lit);
m_core.push_back(lit);
break;
}
case equality_source:

4
src/sat/smt/arith_solver.h
View file

@ -413,8 +413,8 @@ namespace arith {
void get_infeasibility_explanation_and_set_conflict();
void set_conflict();
void set_conflict_or_lemma(literal_vector const& core, bool is_conflict);
void set_evidence(lp::constraint_index idx, literal_vector& core, svector<enode_pair>& eqs);
void assign(literal lit, literal_vector const& core, svector<enode_pair> const& eqs, vector<parameter> const& params);
void set_evidence(lp::constraint_index idx);
void assign(literal lit, literal_vector const& core, svector<enode_pair> const& eqs, char const* pma);
void false_case_of_check_nla(const nla::lemma& l);
void dbg_finalize_model(model& mdl);

2
src/sat/smt/euf_proof.cpp
View file

@ -166,7 +166,7 @@ namespace euf {
lits.push_back(jst.lit_consequent());
if (jst.eq_consequent().first != nullptr)
lits.push_back(add_lit(jst.eq_consequent()));
get_drat().add(lits, sat::status::th(m_is_redundant, jst.ext().get_id()));
get_drat().add(lits, sat::status::th(m_is_redundant, jst.ext().get_id(), jst.get_pragma()));
}
void solver::drat_eq_def(literal lit, expr* eq) {

52
src/sat/smt/sat_th.cpp
View file

@ -125,8 +125,8 @@ namespace euf {
pop_core(n);
}
sat::status th_euf_solver::mk_status() {
return sat::status::th(m_is_redundant, get_id());
sat::status th_euf_solver::mk_status(char const* ps) {
return sat::status::th(m_is_redundant, get_id(), ps);
}
bool th_euf_solver::add_unit(sat::literal lit) {
@ -149,6 +149,11 @@ namespace euf {
return add_clause(2, lits);
}
bool th_euf_solver::add_clause(sat::literal a, sat::literal b, char const* ps) {
sat::literal lits[2] = { a, b };
return add_clause(2, lits, ps);
}
bool th_euf_solver::add_clause(sat::literal a, sat::literal b, sat::literal c) {
sat::literal lits[3] = { a, b, c };
return add_clause(3, lits);
@ -159,12 +164,12 @@ namespace euf {
return add_clause(4, lits);
}
bool th_euf_solver::add_clause(unsigned n, sat::literal* lits) {
bool th_euf_solver::add_clause(unsigned n, sat::literal* lits, char const* ps) {
bool was_true = false;
for (unsigned i = 0; i < n; ++i)
was_true |= is_true(lits[i]);
ctx.add_root(n, lits);
s().add_clause(n, lits, mk_status());
s().add_clause(n, lits, mk_status(ps));
return !was_true;
}
@ -221,37 +226,44 @@ namespace euf {
return ctx.s().rand()();
}
size_t th_explain::get_obj_size(unsigned num_lits, unsigned num_eqs) {
return sat::constraint_base::obj_size(sizeof(th_explain) + sizeof(sat::literal) * num_lits + sizeof(enode_pair) * num_eqs);
size_t th_explain::get_obj_size(unsigned num_lits, unsigned num_eqs, char const* pma) {
return sat::constraint_base::obj_size(sizeof(th_explain) + sizeof(sat::literal) * num_lits + sizeof(enode_pair) * num_eqs + (pma?strlen(pma)+1:1));
}
th_explain::th_explain(unsigned n_lits, sat::literal const* lits, unsigned n_eqs, enode_pair const* eqs, sat::literal c, enode_pair const& p) {
th_explain::th_explain(unsigned n_lits, sat::literal const* lits, unsigned n_eqs, enode_pair const* eqs, sat::literal c, enode_pair const& p, char const* pma) {
m_consequent = c;
m_eq = p;
m_num_literals = n_lits;
m_num_eqs = n_eqs;
m_literals = reinterpret_cast<literal*>(reinterpret_cast<char*>(this) + sizeof(th_explain));
for (unsigned i = 0; i < n_lits; ++i)
char * base_ptr = reinterpret_cast<char*>(this) + sizeof(th_explain);
m_literals = reinterpret_cast<literal*>(base_ptr);
unsigned i;
for (i = 0; i < n_lits; ++i)
m_literals[i] = lits[i];
m_eqs = reinterpret_cast<enode_pair*>(reinterpret_cast<char*>(this) + sizeof(th_explain) + sizeof(literal) * n_lits);
for (unsigned i = 0; i < n_eqs; ++i)
m_eqs[i] = eqs[i];
base_ptr += sizeof(literal) * n_lits;
m_eqs = reinterpret_cast<enode_pair*>(base_ptr);
for (i = 0; i < n_eqs; ++i)
m_eqs[i] = eqs[i];
base_ptr += sizeof(enode_pair) * n_eqs;
m_pragma = reinterpret_cast<char*>(base_ptr);
for (i = 0; pma && pma[i]; ++i)
m_pragma[i] = pma[i];
m_pragma[i] = 0;
}
th_explain* th_explain::mk(th_euf_solver& th, unsigned n_lits, sat::literal const* lits, unsigned n_eqs, enode_pair const* eqs, sat::literal c, enode* x, enode* y) {
th_explain* th_explain::mk(th_euf_solver& th, unsigned n_lits, sat::literal const* lits, unsigned n_eqs, enode_pair const* eqs, sat::literal c, enode* x, enode* y, char const* pma) {
region& r = th.ctx.get_region();
void* mem = r.allocate(get_obj_size(n_lits, n_eqs));
void* mem = r.allocate(get_obj_size(n_lits, n_eqs, pma));
sat::constraint_base::initialize(mem, &th);
return new (sat::constraint_base::ptr2mem(mem)) th_explain(n_lits, lits, n_eqs, eqs, c, enode_pair(x, y));
}
th_explain* th_explain::propagate(th_euf_solver& th, sat::literal_vector const& lits, enode_pair_vector const& eqs, sat::literal consequent) {
return mk(th, lits.size(), lits.data(), eqs.size(), eqs.data(), consequent, nullptr, nullptr);
th_explain* th_explain::propagate(th_euf_solver& th, sat::literal_vector const& lits, enode_pair_vector const& eqs, sat::literal consequent, char const* pma) {
return mk(th, lits.size(), lits.data(), eqs.size(), eqs.data(), consequent, nullptr, nullptr, pma);
}
th_explain* th_explain::propagate(th_euf_solver& th, sat::literal_vector const& lits, enode_pair_vector const& eqs, euf::enode* x, euf::enode* y) {
return mk(th, lits.size(), lits.data(), eqs.size(), eqs.data(), sat::null_literal, x, y);
th_explain* th_explain::propagate(th_euf_solver& th, sat::literal_vector const& lits, enode_pair_vector const& eqs, euf::enode* x, euf::enode* y, char const* pma) {
return mk(th, lits.size(), lits.data(), eqs.size(), eqs.data(), sat::null_literal, x, y, pma);
}
th_explain* th_explain::propagate(th_euf_solver& th, sat::literal lit, euf::enode* x, euf::enode* y) {
@ -293,6 +305,8 @@ namespace euf {
out << "--> " << m_consequent;
if (m_eq.first != nullptr)
out << "--> " << m_eq.first->get_expr_id() << " == " << m_eq.second->get_expr_id();
if (m_pragma != nullptr)
out << " p " << m_pragma;
return out;
}

24
src/sat/smt/sat_th.h
View file

@ -143,15 +143,16 @@ namespace euf {
region& get_region();
sat::status mk_status();
sat::status mk_status(char const* ps = nullptr);
bool add_unit(sat::literal lit);
bool add_units(sat::literal_vector const& lits);
bool add_clause(sat::literal lit) { return add_unit(lit); }
bool add_clause(sat::literal a, sat::literal b);
bool add_clause(sat::literal a, sat::literal b, char const* ps);
bool add_clause(sat::literal a, sat::literal b, sat::literal c);
bool add_clause(sat::literal a, sat::literal b, sat::literal c, sat::literal d);
bool add_clause(sat::literal_vector const& lits) { return add_clause(lits.size(), lits.data()); }
bool add_clause(unsigned n, sat::literal* lits);
bool add_clause(sat::literal_vector const& lits, char const* ps = nullptr) { return add_clause(lits.size(), lits.data(), ps); }
bool add_clause(unsigned n, sat::literal* lits, char const* ps = nullptr);
void add_equiv(sat::literal a, sat::literal b);
void add_equiv_and(sat::literal a, sat::literal_vector const& bs);
@ -213,15 +214,16 @@ namespace euf {
* that retrieve literals on demand.
*/
class th_explain {
sat::literal m_consequent { sat::null_literal }; // literal consequent for propagations
enode_pair m_eq { enode_pair() }; // equality consequent for propagations
sat::literal m_consequent = sat::null_literal; // literal consequent for propagations
enode_pair m_eq = enode_pair(); // equality consequent for propagations
unsigned m_num_literals;
unsigned m_num_eqs;
sat::literal* m_literals;
enode_pair* m_eqs;
static size_t get_obj_size(unsigned num_lits, unsigned num_eqs);
th_explain(unsigned n_lits, sat::literal const* lits, unsigned n_eqs, enode_pair const* eqs, sat::literal c, enode_pair const& eq);
static th_explain* mk(th_euf_solver& th, unsigned n_lits, sat::literal const* lits, unsigned n_eqs, enode_pair const* eqs, sat::literal c, enode* x, enode* y);
char* m_pragma;
static size_t get_obj_size(unsigned num_lits, unsigned num_eqs, char const* pma);
th_explain(unsigned n_lits, sat::literal const* lits, unsigned n_eqs, enode_pair const* eqs, sat::literal c, enode_pair const& eq, char const* pma = nullptr);
static th_explain* mk(th_euf_solver& th, unsigned n_lits, sat::literal const* lits, unsigned n_eqs, enode_pair const* eqs, sat::literal c, enode* x, enode* y, char const* pma = nullptr);
public:
static th_explain* conflict(th_euf_solver& th, sat::literal_vector const& lits, enode_pair_vector const& eqs);
@ -232,8 +234,8 @@ namespace euf {
static th_explain* conflict(th_euf_solver& th, sat::literal lit, euf::enode* x, euf::enode* y);
static th_explain* conflict(th_euf_solver& th, euf::enode* x, euf::enode* y);
static th_explain* propagate(th_euf_solver& th, sat::literal lit, euf::enode* x, euf::enode* y);
static th_explain* propagate(th_euf_solver& th, sat::literal_vector const& lits, enode_pair_vector const& eqs, sat::literal consequent);
static th_explain* propagate(th_euf_solver& th, sat::literal_vector const& lits, enode_pair_vector const& eqs, euf::enode* x, euf::enode* y);
static th_explain* propagate(th_euf_solver& th, sat::literal_vector const& lits, enode_pair_vector const& eqs, sat::literal consequent, char const* pma = nullptr);
static th_explain* propagate(th_euf_solver& th, sat::literal_vector const& lits, enode_pair_vector const& eqs, euf::enode* x, euf::enode* y, char const* pma = nullptr);
sat::ext_constraint_idx to_index() const {
return sat::constraint_base::mem2base(this);
@ -268,6 +270,8 @@ namespace euf {
enode_pair eq_consequent() const { return m_eq; }
char const* get_pragma() const { return *m_pragma ? m_pragma : nullptr; }
};