From fe73926cd62781b0db96be74bb87e2c6a8518ab4 Mon Sep 17 00:00:00 2001
From: Federico Poli <federpoli@gmail.com>
Date: Tue, 18 Jan 2022 18:08:45 +0100
Subject: [PATCH] Report quantifier instantiations

---
 src/main/scala/decider/Z3ProverStdIO.scala | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/main/scala/decider/Z3ProverStdIO.scala b/src/main/scala/decider/Z3ProverStdIO.scala
index c8a08718c..a249891bb 100644
--- a/src/main/scala/decider/Z3ProverStdIO.scala
+++ b/src/main/scala/decider/Z3ProverStdIO.scala
@@ -425,7 +425,15 @@ class Z3ProverStdIO(uniqueId: String,
         logger warn msg
       }
 
-      repeat = warning
+      // When `smt.qi.profile` is `true`, Z3 periodically reports the quantifier instantiations using the format
+      // `[quantifier_instances] "<quantifier_id>" : <instances> : <maximum generation> : <maximum cost>`.
+      // See: https://github.com/Z3Prover/z3/issues/4522
+      val qiProfile = result.startsWith("[quantifier_instances]")
+      if (qiProfile) {
+        logger info result
+      }
+
+      repeat = warning || qiProfile
     }
 
     result