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fix #1841

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2018-11-22 15:28:33 -08:00
parent 7bc3b4e381
commit f591e0948a
8 changed files with 209 additions and 210 deletions
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12
src/smt/theory_seq.h
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@ -196,23 +196,28 @@ namespace smt {
class nc {
expr_ref m_contains;
literal m_len_gt;
dependency* m_dep;
public:
nc(expr_ref const& c, dependency* dep):
nc(expr_ref const& c, literal len_gt, dependency* dep):
m_contains(c),
m_len_gt(len_gt),
m_dep(dep) {}
nc(nc const& other):
m_contains(other.m_contains),
m_len_gt(other.m_len_gt),
m_dep(other.m_dep) {}
nc& operator=(nc const& other) {
if (this != &other) {
m_contains = other.m_contains;
m_dep = other.m_dep;
m_len_gt = other.m_len_gt;
}
return *this;
}
dependency* deps() const { return m_dep; }
expr_ref const& contains() const { return m_contains; }
literal len_gt() const { return m_len_gt; }
};
class apply {
@ -530,7 +535,7 @@ namespace smt {
bool has_length(expr *e) const { return m_length.contains(e); }
void add_length(expr* e);
void enforce_length(enode* n);
void enforce_length(expr* n);
bool enforce_length(expr_ref_vector const& es, vector<rational>& len);
void enforce_length_coherence(enode* n1, enode* n2);
@ -552,6 +557,7 @@ namespace smt {
literal mk_simplified_literal(expr* n);
literal mk_eq_empty(expr* n, bool phase = true);
literal mk_seq_eq(expr* a, expr* b);
literal mk_preferred_eq(expr* a, expr* b);
void tightest_prefix(expr* s, expr* x);
expr_ref mk_sub(expr* a, expr* b);
expr_ref mk_add(expr* a, expr* b);
@ -599,8 +605,6 @@ namespace smt {
bool add_accept2step(expr* acc, bool& change);
bool add_step2accept(expr* step, bool& change);
bool add_prefix2prefix(expr* e, bool& change);
bool add_suffix2suffix(expr* e, bool& change);
bool add_contains2contains(expr* e, bool& change);
void propagate_not_prefix(expr* e);
void propagate_not_prefix2(expr* e);
void propagate_not_suffix(expr* e);