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seq

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2020-05-17 05:35:32 -07:00
parent 34cc60410f
commit fc8dfe3e40
5 changed files with 50 additions and 47 deletions
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4
src/smt/seq_axioms.cpp
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@ -802,7 +802,7 @@ void seq_axioms::add_str_to_code_axiom(expr* n) {
VERIFY(seq.str.is_to_code(n, e));
literal len_is1 = mk_eq(mk_len(e), a.mk_int(1));
add_axiom(~len_is1, mk_ge(n, 0));
add_axiom(~len_is1, mk_le(n, seq.str.max_char_value()));
add_axiom(~len_is1, mk_le(n, zstring::max_char()));
add_axiom(len_is1, mk_eq(n, a.mk_int(-1)));
}
@ -815,7 +815,7 @@ void seq_axioms::add_str_from_code_axiom(expr* n) {
expr* e = nullptr;
VERIFY(seq.str.is_from_code(n, e));
literal ge = mk_ge(e, 0);
literal le = mk_le(e, seq.str.max_char_value());
literal le = mk_le(e, zstring::max_char());
literal emp = mk_literal(seq.str.mk_is_empty(n));
add_axiom(~ge, ~le, mk_eq(mk_len(n), a.mk_int(1)));
add_axiom(~ge, ~le, mk_eq(seq.str.mk_to_code(n), e));