MAYBE

Problem:
 active(g(X)) -> mark(h(X))
 active(c()) -> mark(d())
 active(h(d())) -> mark(g(c()))
 mark(g(X)) -> active(g(X))
 mark(h(X)) -> active(h(X))
 mark(c()) -> active(c())
 mark(d()) -> active(d())
 g(mark(X)) -> g(X)
 g(active(X)) -> g(X)
 h(mark(X)) -> h(X)
 h(active(X)) -> h(X)

Proof:
 DP Processor:
  DPs:
   active#(g(X)) -> h#(X)
   active#(g(X)) -> mark#(h(X))
   active#(c()) -> mark#(d())
   active#(h(d())) -> g#(c())
   active#(h(d())) -> mark#(g(c()))
   mark#(g(X)) -> active#(g(X))
   mark#(h(X)) -> active#(h(X))
   mark#(c()) -> active#(c())
   mark#(d()) -> active#(d())
   g#(mark(X)) -> g#(X)
   g#(active(X)) -> g#(X)
   h#(mark(X)) -> h#(X)
   h#(active(X)) -> h#(X)
  TRS:
   active(g(X)) -> mark(h(X))
   active(c()) -> mark(d())
   active(h(d())) -> mark(g(c()))
   mark(g(X)) -> active(g(X))
   mark(h(X)) -> active(h(X))
   mark(c()) -> active(c())
   mark(d()) -> active(d())
   g(mark(X)) -> g(X)
   g(active(X)) -> g(X)
   h(mark(X)) -> h(X)
   h(active(X)) -> h(X)
  CDG Processor:
   DPs:
    active#(g(X)) -> h#(X)
    active#(g(X)) -> mark#(h(X))
    active#(c()) -> mark#(d())
    active#(h(d())) -> g#(c())
    active#(h(d())) -> mark#(g(c()))
    mark#(g(X)) -> active#(g(X))
    mark#(h(X)) -> active#(h(X))
    mark#(c()) -> active#(c())
    mark#(d()) -> active#(d())
    g#(mark(X)) -> g#(X)
    g#(active(X)) -> g#(X)
    h#(mark(X)) -> h#(X)
    h#(active(X)) -> h#(X)
   TRS:
    active(g(X)) -> mark(h(X))
    active(c()) -> mark(d())
    active(h(d())) -> mark(g(c()))
    mark(g(X)) -> active(g(X))
    mark(h(X)) -> active(h(X))
    mark(c()) -> active(c())
    mark(d()) -> active(d())
    g(mark(X)) -> g(X)
    g(active(X)) -> g(X)
    h(mark(X)) -> h(X)
    h(active(X)) -> h(X)
   graph:
    g#(mark(X)) -> g#(X) -> g#(mark(X)) -> g#(X)
    g#(mark(X)) -> g#(X) -> g#(active(X)) -> g#(X)
    g#(active(X)) -> g#(X) -> g#(mark(X)) -> g#(X)
    g#(active(X)) -> g#(X) -> g#(active(X)) -> g#(X)
    mark#(c()) -> active#(c()) -> active#(c()) -> mark#(d())
    mark#(h(X)) -> active#(h(X)) -> active#(h(d())) -> g#(c())
    mark#(h(X)) -> active#(h(X)) -> active#(h(d())) -> mark#(g(c()))
    mark#(g(X)) -> active#(g(X)) -> active#(g(X)) -> h#(X)
    mark#(g(X)) -> active#(g(X)) -> active#(g(X)) -> mark#(h(X))
    h#(mark(X)) -> h#(X) -> h#(mark(X)) -> h#(X)
    h#(mark(X)) -> h#(X) -> h#(active(X)) -> h#(X)
    h#(active(X)) -> h#(X) -> h#(mark(X)) -> h#(X)
    h#(active(X)) -> h#(X) -> h#(active(X)) -> h#(X)
    active#(c()) -> mark#(d()) -> mark#(d()) -> active#(d())
    active#(h(d())) -> mark#(g(c())) -> mark#(g(X)) -> active#(g(X))
    active#(g(X)) -> mark#(h(X)) -> mark#(h(X)) -> active#(h(X))
    active#(g(X)) -> h#(X) -> h#(mark(X)) -> h#(X)
    active#(g(X)) -> h#(X) -> h#(active(X)) -> h#(X)
   SCC Processor:
    #sccs: 3
    #rules: 8
    #arcs: 18/169
    DPs:
     mark#(h(X)) -> active#(h(X))
     active#(h(d())) -> mark#(g(c()))
     mark#(g(X)) -> active#(g(X))
     active#(g(X)) -> mark#(h(X))
    TRS:
     active(g(X)) -> mark(h(X))
     active(c()) -> mark(d())
     active(h(d())) -> mark(g(c()))
     mark(g(X)) -> active(g(X))
     mark(h(X)) -> active(h(X))
     mark(c()) -> active(c())
     mark(d()) -> active(d())
     g(mark(X)) -> g(X)
     g(active(X)) -> g(X)
     h(mark(X)) -> h(X)
     h(active(X)) -> h(X)
    Open
    
    DPs:
     h#(active(X)) -> h#(X)
     h#(mark(X)) -> h#(X)
    TRS:
     active(g(X)) -> mark(h(X))
     active(c()) -> mark(d())
     active(h(d())) -> mark(g(c()))
     mark(g(X)) -> active(g(X))
     mark(h(X)) -> active(h(X))
     mark(c()) -> active(c())
     mark(d()) -> active(d())
     g(mark(X)) -> g(X)
     g(active(X)) -> g(X)
     h(mark(X)) -> h(X)
     h(active(X)) -> h(X)
    Open
    
    DPs:
     g#(mark(X)) -> g#(X)
     g#(active(X)) -> g#(X)
    TRS:
     active(g(X)) -> mark(h(X))
     active(c()) -> mark(d())
     active(h(d())) -> mark(g(c()))
     mark(g(X)) -> active(g(X))
     mark(h(X)) -> active(h(X))
     mark(c()) -> active(c())
     mark(d()) -> active(d())
     g(mark(X)) -> g(X)
     g(active(X)) -> g(X)
     h(mark(X)) -> h(X)
     h(active(X)) -> h(X)
    Open