mirrors/z3
3
0
Fork 0
mirror of https://github.com/Z3Prover/z3 synced 2025-11-28 08:19:50 +00:00
Code Activity

enable inequalities that are not normal form

Browse source 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2025-11-21 21:02:44 -08:00
parent 8c224ccf03
commit 896b3ccf69
1 changed files with 35 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

36
src/smt/theory_lra.cpp
View file

@ -885,6 +885,9 @@ public:
mk_is_int_axiom(n);
}
ptr_vector<expr> m_delay_ineqs;
unsigned m_delay_ineqs_qhead = 0;
bool internalize_atom(app * atom, bool gate_ctx) {
TRACE(arith_internalize, tout << bpp(atom) << "\n";);
SASSERT(!ctx().b_internalized(atom));
@ -915,6 +918,11 @@ public:
internalize_is_int(atom);
return true;
}
else if (a.is_le(atom) || a.is_ge(atom)) {
m_delay_ineqs.push_back(atom);
ctx().push_trail(push_back_vector<ptr_vector<expr>>(m_delay_ineqs));
return true;
}
else {
TRACE(arith, tout << "Could not internalize " << mk_pp(atom, m) << "\n";);
found_unsupported(atom);
@ -2176,6 +2184,8 @@ public:
unsigned total_conflicts = ctx().get_num_conflicts();
if (total_conflicts < 10)
return true;
if (m_delay_ineqs_qhead < m_delay_ineqs.size())
return true;
double f = static_cast<double>(m_num_conflicts)/static_cast<double>(total_conflicts);
return f >= adaptive_assertion_threshold();
}
@ -2185,7 +2195,8 @@ public:
}
bool can_propagate_core() {
return m_asserted_atoms.size() > m_asserted_qhead || m_new_def || lp().has_changed_columns();
return m_asserted_atoms.size() > m_asserted_qhead || m_new_def || lp().has_changed_columns() ||
m_delay_ineqs_qhead < m_delay_ineqs.size();
}
bool propagate() {
@ -2200,6 +2211,29 @@ public:
return true;
if (!can_propagate_core())
return false;
for (; m_delay_ineqs_qhead < m_delay_ineqs.size() && !ctx().inconsistent() && m.inc(); ++m_delay_ineqs_qhead) {
auto atom = m_delay_ineqs[m_delay_ineqs_qhead];
ctx().push_trail(value_trail(m_delay_ineqs_qhead));
if (!ctx().is_relevant(atom))
continue;
expr *x, *y;
if (a.is_le(atom, x, y)) {
auto lit1 = mk_literal(atom);
auto lit2 = mk_literal(a.mk_le(a.mk_sub(x, y), a.mk_numeral(rational(0), a.is_int(x->get_sort()))));
mk_axiom(~lit1, lit2);
mk_axiom(lit1, ~lit2);
}
else if (a.is_ge(atom, x, y)) {
auto lit1 = mk_literal(atom);
auto lit2 = mk_literal(a.mk_ge(a.mk_sub(x, y), a.mk_numeral(rational(0), a.is_int(x->get_sort()))));
mk_axiom(~lit1, lit2);
mk_axiom(lit1, ~lit2);
}
else {
UNREACHABLE();
}
}
m_new_def = false;
while (m_asserted_qhead < m_asserted_atoms.size() && !ctx().inconsistent() && m.inc()) {