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fix #2643

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2019-10-18 09:48:46 -07:00
parent 5eead52cc0
commit 724a42b6f2
1 changed files with 4 additions and 1 deletions
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5
src/cmd_context/basic_cmds.cpp
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@ -180,7 +180,10 @@ ATOMIC_CMD(get_proof_cmd, "get-proof", "retrieve proof", {
if (ctx.ignore_check())
return;
expr_ref pr(ctx.m());
pr = ctx.get_check_sat_result()->get_proof();
auto* chsr = ctx.get_check_sat_result();
if (!chsr)
throw cmd_exception("proof is not available");
pr = chsr->get_proof();
if (!pr && !ctx.produce_proofs())
throw cmd_exception("proof construction is not enabled, use command (set-option :produce-proofs true)");
if (!pr)