From e2cfc53c9fe44690bf4310ad0ce8d0b6deea91f5 Mon Sep 17 00:00:00 2001
From: Nikolaj Bjorner <nbjorner@microsoft.com>
Date: Thu, 13 Oct 2022 15:31:58 +0200
Subject: [PATCH] #6364

skip proof hint unless proofs are on
---
 src/sat/smt/q_mbi.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/sat/smt/q_mbi.cpp b/src/sat/smt/q_mbi.cpp
index d81256393..4530e9f93 100644
--- a/src/sat/smt/q_mbi.cpp
+++ b/src/sat/smt/q_mbi.cpp
@@ -71,7 +71,7 @@ namespace q {
         for (auto const& [qlit, fml, inst, generation] : m_instantiations) {
             euf::solver::scoped_generation sg(ctx, generation + 1);
             sat::literal lit = ~ctx.mk_literal(fml);
-            auto* ph = q_proof_hint::mk(ctx, ~qlit, lit, inst.size(), inst.data());
+            auto* ph = ctx.use_drat()? q_proof_hint::mk(ctx, ~qlit, lit, inst.size(), inst.data()) : nullptr;
             m_qs.add_clause(~qlit, lit, ph);
             m_qs.log_instantiation(~qlit, lit);
         }