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move flatten functionality to asserted_formulas, sort variables in lut_finder

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2020-02-06 09:16:23 -08:00
parent 38d690650b
commit 8b23a1701a
9 changed files with 88 additions and 57 deletions
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37
src/smt/smt_internalizer.cpp
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@ -182,27 +182,6 @@ namespace smt {
}
}
bool context::split_binary(app* o, expr*& a, expr_ref& b, expr_ref& c) {
expr* x = nullptr, *y = nullptr, *ny = nullptr, *z = nullptr, *u = nullptr;
if (m.is_or(o, x, y) &&
m.is_not(y, ny) &&
m.is_or(ny, z, u)) {
a = x;
b = m.is_not(z, z) ? z : m.mk_not(z);
c = m.is_not(u, u) ? u : m.mk_not(u);
return true;
}
if (m.is_or(o, y, x) &&
m.is_not(y, ny) &&
m.is_or(ny, z, u)) {
a = x;
b = m.is_not(z, z) ? z : m.mk_not(z);
c = m.is_not(u, u) ? u : m.mk_not(u);
return true;
}
return false;
}
#define DEEP_EXPR_THRESHOLD 1024
@ -251,16 +230,6 @@ namespace smt {
expr* a = nullptr;
expr_ref b(m), c(m);
// perform light-weight rewriting on clauses.
if (!relevancy() && split_binary(to_app(n), a, b, c)) {
internalize(a, true);
internalize(b, true);
internalize(c, true);
literal lits2[2] = { get_literal(a), get_literal(b) };
literal lits3[2] = { get_literal(a), get_literal(c) };
mk_root_clause(2, lits2, pr);
mk_root_clause(2, lits3, pr);
break;
}
for (expr * arg : *to_app(n)) {
internalize(arg, true);
lits.push_back(get_literal(arg));
@ -1479,12 +1448,6 @@ namespace smt {
}}
}
void context::add_lit_occs(clause const& cls) {
for (literal l : cls) {
inc_ref(l);
}
}
void context::mk_clause(literal l1, literal l2, justification * j) {
literal ls[2] = { l1, l2 };
mk_clause(2, ls, j);