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Fix #430: disable rewriting of concatentations with constants because it breaks equality propagation

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2016-02-05 10:59:24 +00:00
parent 2a65503235
commit cf970fd76a
2 changed files with 9 additions and 5 deletions
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10
src/tactic/core/solve_eqs_tactic.cpp
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@ -106,9 +106,13 @@ class solve_eqs_tactic : public tactic {
}
}
bool trivial_solve(expr * lhs, expr * rhs, app_ref & var, expr_ref & def, proof_ref & pr) {
return
trivial_solve1(lhs, rhs, var, def, pr) ||
trivial_solve1(rhs, lhs, var, def, pr);
if (trivial_solve1(lhs, rhs, var, def, pr)) return true;
if (trivial_solve1(rhs, lhs, var, def, pr)) {
if (m_produce_proofs) {
pr = m().mk_commutativity(m().mk_eq(lhs, rhs));
}
}
return false;
}
// (ite c (= x t1) (= x t2)) --> (= x (ite c t1 t2))