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use variable id as level, separate cut-set updates, add missing reset in pdd

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Nikolaj Bjorner 2020-01-08 02:15:45 -08:00
parent 55554215ac
commit 57846e50fa
8 changed files with 158 additions and 126 deletions
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13
src/sat/sat_aig_simplifier.h
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@ -32,7 +32,7 @@ namespace sat {
};
class aig_cuts {
// encodes one of var, n1 & n2 & .. & nk, !(n1 & n2 & .. & nk)
// encodes one of var, and, !and, xor, !xor, ite, !ite.
class node {
bool m_sign;
bool_op m_op;
@ -54,11 +54,20 @@ namespace sat {
unsigned num_children() const { SASSERT(!is_var()); return m_num_children; }
unsigned offset() const { return m_offset; }
};
svector<node> m_aig; // vector of aig nodes.
svector<node> m_aig; // vector of main aig nodes.
vector<svector<node>> m_aux_aig; // vector of auxiliary aig nodes.
literal_vector m_literals;
region m_region;
unsigned m_max_cut_size;
unsigned m_max_cutset_size;
cut_set m_cut_set1, m_cut_set2;
unsigned_vector top_sort();
void augment(unsigned_vector const& ids, vector<cut_set>& cuts);
void augment_ite(node const& n, cut_set& cs, vector<cut_set>& cuts);
void augment_aig2(node const& n, cut_set& cs, vector<cut_set>& cuts);
void augment_aigN(node const& n, cut_set& cs, vector<cut_set>& cuts);
public:
void add_var(unsigned v);
void add_node(literal head, bool_op op, unsigned sz, literal const* args);