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deal with subtraction that manages to sneak in. Issue #996

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2017-05-01 15:22:06 -07:00
parent aceee3fac8
commit d14f2af5ae
8 changed files with 84 additions and 47 deletions
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6
src/tactic/portfolio/enum2bv_solver.cpp
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@ -137,8 +137,10 @@ public:
SASSERT(num.is_unsigned());
expr_ref head(m);
ptr_vector<func_decl> const& enums = *dt.get_datatype_constructors(f->get_range());
head = m.mk_eq(m.mk_const(f), m.mk_const(enums[num.get_unsigned()]));
consequences[i] = m.mk_implies(a, head);
if (enums.size() > num.get_unsigned()) {
head = m.mk_eq(m.mk_const(f), m.mk_const(enums[num.get_unsigned()]));
consequences[i] = m.mk_implies(a, head);
}
}
}
return r;