Copyright (C) 2001-2010 Roberto Bagnara <bagnara@cs.unipr.it>
Copyright (C) 2010-2012 BUGSENG srl (http://bugseng.com)
this program is free software, covered by the GNU General Public License,
and you are welcome to change it and/or distribute copies of it
under certain conditions.
Type "copying" to see the conditions.
There is ABSOLUTELY NO WARRANTY for this program.
Type "warranty" for details.
PPL clpq ?- yes
PPL clpq ?- Z = 5
 more? yes
PPL clpq ?- yes
PPL clpq ?- X = 0
Y - Z = -1
 more? yes
PPL clpq ?- yes
PPL clpq ?- Y = 102
 more? yes
PPL clpq ?- yes
PPL clpq ?- Y = 8
 more? yes
PPL clpq ?- yes
PPL clpq ?- 
Error: an overflow has been detected by the PPL: Negative overflow.
no
PPL clpq ?- yes
PPL clpq ?- R = 45
O = 9
M = 45
D = 9
N = 55
E = 10
S = 10
Y = 8
 more? yes
PPL clpq ?- 