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deal with absence of integer congruence root by querying arithmetic theory directly, #1202

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2017-08-13 14:24:56 -07:00
parent 00742566fb
commit b6cc24faf3
1 changed files with 6 additions and 1 deletions
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7
src/smt/theory_str.cpp
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@ -4656,7 +4656,7 @@ namespace smt {
// safety
if (!ctx.e_internalized(e)) {
return false;
return false;
}
// if an integer constant exists in the eqc, it should be the root
@ -4667,6 +4667,10 @@ namespace smt {
return true;
} else {
TRACE("str", tout << "root of eqc of " << mk_pp(e, m) << " is not a numeral" << std::endl;);
theory_mi_arith* tha = get_th_arith(ctx, m_autil.get_family_id(), e);
if (!tha) return false;
expr_ref val_e(m);
if (tha->get_value(root_e, val_e) && m_autil.is_numeral(val_e, val) && val.is_int()) return true;
return false;
}
}
@ -8450,6 +8454,7 @@ namespace smt {
expr_ref is_zero(ctx.mk_eq_atom(a, m_autil.mk_int(0)), m);
literal is_zero_l = mk_literal(is_zero);
axiomAdd = true;
TRACE("str", ctx.display(tout););
// NOT_IMPLEMENTED_YET();
}