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fixing #2443 #2445 #2447 #2448

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2019-08-03 01:21:09 +08:00
parent 584eee2cf4
commit 2d5714a5d4
2 changed files with 4 additions and 7 deletions
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6
src/ast/seq_decl_plugin.h
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@ -40,9 +40,9 @@ enum seq_op_kind {
OP_SEQ_EXTRACT,
OP_SEQ_REPLACE,
OP_SEQ_AT,
OP_SEQ_NTH,
OP_SEQ_NTH_I,
OP_SEQ_NTH_U,
OP_SEQ_NTH, // NTH function exposed over API. Rewritten to NTH(s,i) := if (0 <= i < len(s)) then NTH_I(s,i) else NTH_U(s,i)
OP_SEQ_NTH_I, // Interpreted variant of Nth for indices within defined domain.
OP_SEQ_NTH_U, // Uninterpreted variant of Nth for indices outside of uniquely defined domain.
OP_SEQ_LENGTH,
OP_SEQ_INDEX,
OP_SEQ_LAST_INDEX,

5
src/smt/theory_seq.cpp
View file

@ -5529,9 +5529,6 @@ void theory_seq::assign_eh(bool_var v, bool is_true) {
else if (m_util.str.is_in_re(e)) {
propagate_in_re(e, is_true);
}
else if (is_skolem(symbol("seq.split"), e)) {
// propagate equalities
}
else if (is_skolem(symbol("seq.is_digit"), e)) {
// no-op
}
@ -5541,7 +5538,7 @@ void theory_seq::assign_eh(bool_var v, bool is_true) {
else if (m_util.str.is_lt(e) || m_util.str.is_le(e)) {
m_lts.push_back(e);
}
else if (m_util.str.is_nth_i(e)) {
else if (m_util.str.is_nth_i(e) || m_util.str.is_nth_u(e)) {
// no-op
}
else {