From 03d9a7512ac41fe8ca2d4c63899f0bde008fa23b Mon Sep 17 00:00:00 2001
From: Alexandre Duret-Lutz <adl@lrde.epita.fr>
Date: Sat, 6 Feb 2016 12:10:53 +0100
Subject: [PATCH] determinize: do not work on deterministic automata

* spot/twaalgos/determinize.cc: Here.
---
 spot/twaalgos/determinize.cc | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/spot/twaalgos/determinize.cc b/spot/twaalgos/determinize.cc
index d3a3c66e2..cbaad7d63 100644
--- a/spot/twaalgos/determinize.cc
+++ b/spot/twaalgos/determinize.cc
@@ -611,6 +611,9 @@ namespace spot
 		   bool pretty_print, bool use_scc,
 		   bool use_simulation, bool use_stutter)
   {
+    if (a->prop_deterministic())
+      return std::const_pointer_cast<twa_graph>(a);
+
     // Degeneralize
     twa_graph_ptr aut = spot::degeneralize_tba(a);
     std::map<int, bdd> implications;