+and proof =
+ | BasicProof of Cic.term
+ | ProofBlock of
+ Cic.substitution * UriManager.uri *
+ (* name, ty, eq_ty, left, right *)
+ (Cic.name * Cic.term * Cic.term * Cic.term * Cic.term) *
+ (Utils.pos * equality) * equality
+ | NoProof
+
+
+type environment = Cic.metasenv * Cic.context * CicUniv.universe_graph