1:      1  1 CALL pred implied_instance.main/2-0 (det) implied_instance.m:30
mdb> echo on
Command echo enabled.
mdb> register --quiet
mdb> context none
Contexts will not be printed.
mdb> alias P print *
P      =>    print *
mdb> goto 2
       2:      2  2 CALL pred implied_instance.p/2-0 (det)
mdb> P
       HeadVar__1             	2
mdb> 
       3:      3  3 CALL pred implied_instance.ClassMethod_for_implied_instance__sumable____int__arity0______implied_instance__p_2/2-0 (det)
mdb> P
       HeadVar__1             	2
mdb> break -e p
 0: + stop  entry     pred implied_instance.p/2-0 (det)
mdb> continue -a
       4:      4  4 CALL pred implied_instance.copy_int/2-0 (det)
       5:      4  4 EXIT pred implied_instance.copy_int/2-0 (det)
       6:      3  3 EXIT pred implied_instance.ClassMethod_for_implied_instance__sumable____int__arity0______implied_instance__p_2/2-0 (det)
       7:      2  2 EXIT pred implied_instance.p/2-0 (det)
       8:      5  2 CALL pred implied_instance.p/2-0 (det)
mdb> P
       HeadVar__1             	[42, 24, 1, 2, 3]
mdb> 
       9:      6  3 CALL pred implied_instance.ClassMethod_for_implied_instance__sumable____list__list__arity1______implied_instance__p_2/2-0 (det)
mdb> P
       HeadVar__1             	[42, 24, 1, 2, 3]
mdb> 
      10:      7  4 CALL pred implied_instance.sum_int_list/2-0 (det)
mdb> P
       HeadVar__1             	[42, 24, 1, 2, 3]
mdb> continue -a
      11:      7  4 SWTC pred implied_instance.sum_int_list/2-0 (det) s2-2;
      12:      8  5 CALL pred implied_instance.p/2-0 (det)
mdb> P
       HeadVar__1             	42
mdb> 
      13:      9  6 CALL pred implied_instance.ClassMethod_for_implied_instance__sumable____int__arity0______implied_instance__p_2/2-0 (det)
mdb> P
       HeadVar__1             	42
mdb> continue -S
2
72