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streamline unicode/ascii toggling. Fix bit-width for unicode to 18

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This commit is contained in:
Nikolaj Bjorner 2021-01-23 11:11:44 -08:00
parent 90eb4de526
commit 03fd251ccb
6 changed files with 36 additions and 22 deletions
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4
src/smt/seq_axioms.cpp
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@ -811,7 +811,7 @@ 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, zstring::max_char()));
add_axiom(~len_is1, mk_le(n, seq.max_char()));
add_axiom(len_is1, mk_eq(n, a.mk_int(-1)));
}
@ -824,7 +824,7 @@ 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, zstring::max_char());
literal le = mk_le(e, seq.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));