E1:     C1 CALL pred browser_mode.main/2-0 (det) browser_mode.m:17
mdb> mdb> Contexts will not be printed.
mdb> echo on
Command echo enabled.
mdb> break p
 0: + stop  interface pred browser_mode.p/2-0 (nondet)
mdb> c
      E2:     C2 CALL pred browser_mode.p/2-0 (nondet)
mdb> f
      E3:     C2 EXIT pred browser_mode.p/2-0 (nondet)
mdb> dd -d 3 -n 7
p('a', 30)
Valid? browse
browser> mode
Not Applicable
browser> cd 1
browser> mode
Input
browser> cd ../2
browser> mode
Output
browser> quit
dd> q
Diagnosis aborted.
      E3:     C2 EXIT pred browser_mode.p/2-0 (nondet)
mdb> break r
 1: + stop  interface pred browser_mode.r/2-0 (semidet)
mdb> c
      E4:     C2 REDO pred browser_mode.p/2-0 (nondet)
mdb> c
      E5:     C2 EXIT pred browser_mode.p/2-0 (nondet)
mdb> c
      E6:     C2 REDO pred browser_mode.p/2-0 (nondet)
mdb> c
      E7:     C3 CALL pred browser_mode.r/2-0 (semidet)
mdb> c
      E8:     C3 FAIL pred browser_mode.r/2-0 (semidet)
mdb> dd -d 3 -n 7
Call r('b', _)
Unsatisfiable? b 1
browser> mode
Input
browser> quit
dd> b
browser> mode 2
Unbound
browser> mode 1
Input
browser> quit
dd> q
Diagnosis aborted.
      E8:     C3 FAIL pred browser_mode.r/2-0 (semidet)
mdb> quit -y