ProofEngineTypes.proof ->
int -> (Cic.term -> Cic.term) -> Cic.metasenv ->
ProofEngineTypes.proof * Cic.metasenv
+
+(* returns the list of goals that are in newmetasenv and were not in
+ oldmetasenv *)
+val compare_metasenvs :
+ oldmetasenv:Cic.metasenv -> newmetasenv:Cic.metasenv -> int list