BDD-infer failure: unsupported feature, unsupported feature: simple_expr_to_why1_stmt: let on type
  `list 'xi` (type_of: `Ityapp(list,['xi],[])`)

BDD-infer failure: unsupported feature, unsupported feature: simple_expr_to_why1_stmt: let on type
  `list 'xi1` (type_of: `Ityapp(list,['xi1],[])`)

BDD-infer failure: unsupported feature, unsupported feature: simple_expr_to_why1_stmt: let on type
  `list 'xi2` (type_of: `Ityapp(list,['xi2],[])`)

File bench/infer/uf6.mlw:
Goal cons'vc.
Prover result is: Unknown () (0.02s).

File bench/infer/uf6.mlw:
Goal nil'vc.
Prover result is: Unknown () (0.01s).

File bench/infer/uf6.mlw:
Goal b'vc.
Prover result is: Unknown () (0.02s).

File bench/infer/uf6.mlw:
Goal b2'vc.
Prover result is: Unknown () (0.02s).

File bench/infer/uf6.mlw:
Goal b3'vc.
Prover result is: Unknown () (0.02s).

