let ast = proc_proof st v in
let steps, nodes = T.count_steps 0 ast, T.count_nodes 0 ast in
let text = Printf.sprintf "tactics: %u\nnodes: %u" steps nodes in
let ast = proc_proof st v in
let steps, nodes = T.count_steps 0 ast, T.count_nodes 0 ast in
let text = Printf.sprintf "tactics: %u\nnodes: %u" steps nodes in