TODO Update

TODO.md

@@ -2,6 +2,9 @@
 
 ## Main goals
 
+- Add a backend to send proofs to dedukti
+    * First, pure resolution proofs
+    * Then, require theories to output lemma proofs for dedukti (in some format yet to be decided)
 - Allow to plug one's code into boolean propagation
     * react upon propagation (possibly by propagating more, or side-effect)
     * more advanced/specific propagation (2-clauses)?
@@ -11,3 +14,4 @@
 ## Long term goals
 
 - max-sat/max-smt
+- coq proofs ?

util/sat_solve.ml

@@ -213,7 +213,7 @@ let () =
   with
   | Incorrect_model ->
     print "Internal error : incorrect *sat* model";
-    exit 2
+    exit 4
   | Out_of_time ->
     print "Time limit exceeded";
     exit 2