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fix #1547 by rewriting legacy recognizers to SMT-LIB2.6 style recognizers which are assumed by theory_datatype

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2018-03-19 13:33:58 -07:00
parent b12a1caa07
commit ebc6ec2eb5
5 changed files with 16 additions and 8 deletions
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3
src/ast/rewriter/datatype_rewriter.cpp
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@ -23,6 +23,9 @@ br_status datatype_rewriter::mk_app_core(func_decl * f, unsigned num_args, expr
switch(f->get_decl_kind()) {
case OP_DT_CONSTRUCTOR: return BR_FAILED;
case OP_DT_RECOGNISER:
SASSERT(num_args == 1);
result = m_util.mk_is(m_util.get_recognizer_constructor(f), args[0]);
return BR_REWRITE1;
case OP_DT_IS:
//
// simplify is_cons(cons(x,y)) -> true