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/* Different ways of creating an empty BD_Shape.
Copyright (C) 2001-2010 Roberto Bagnara <bagnara@cs.unipr.it>
Copyright (C) 2010-2011 BUGSENG srl (http://bugseng.com)
This file is part of the Parma Polyhedra Library (PPL).
The PPL is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 3 of the License, or (at your
option) any later version.
The PPL is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111-1307, USA.
For the most up-to-date information see the Parma Polyhedra Library
site: http://www.cs.unipr.it/ppl/ . */
#include "ppl_test.hh"
namespace {
bool
test01() {
Variable x(0);
Variable y(1);
Variable z(2);
TBD_Shape bds1(4);
TBD_Shape bds2(4);
bds1.add_constraint(-x <= 4);
bds1.add_constraint(y - x <= 0);
bds1.add_constraint(x - y <= -5);
bool empty = bds1.is_empty();
nout << "*** bds1.is_empty() ***" << endl;
nout << (empty ? "true" : "false ") << endl;
bds2.add_constraint(-x <= 4);
bds2.add_constraint(y - x <= 0);
bds2.add_constraint(x - y <= 5);
bds2.add_constraint(z - x <= 1);
bool empty1 = bds2.is_empty();
nout << "*** bds2.is_empty() ***" << endl;
nout << (empty1 ? "true" : "false") << endl;
return !empty1 && empty;
}
bool
test02() {
Variable x(0);
Variable y(1);
Variable z(2);
TBD_Shape bds1(4);
TBD_Shape bds2(4);
bds1.add_constraint(-x <= 2);
bds1.add_constraint(y - x <= -9);
bds1.add_constraint(x - y <= -7);
bool empty = bds1.is_empty();
print_constraints(bds1, "*** bds1 ***");
nout << "*** bds1.is_empty() ***" << endl;
nout << (empty ? "true" : "false") << endl;
bds2.add_constraint(-x <= 7);
bds2.add_constraint(y - x <= 1);
bds2.add_constraint(-y <= 2);
bds2.add_constraint(z - x <= 1);
bool empty1 = bds2.is_empty();
print_constraints(bds2, "*** bds2 ***");
nout << "*** bds2.is_empty() ***" << endl;
nout << (empty1 ? "true" : "false") << endl;
return !empty1 && empty;
}
bool
test03() {
Variable x1(0);
Variable x2(1);
Variable x3(2);
Variable x4(3);
Variable x5(4);
// Variable x6(5);
TBD_Shape bds1(6);
TBD_Shape bds2(6);
bds1.add_constraint(x1 <= 3);
bds1.add_constraint(x4 <= 3);
bds1.add_constraint(x2 - x1 <= 0);
bds1.add_constraint(x3 - x1 <= -2);
bds1.add_constraint(x5 - x1 <= 2);
bds1.add_constraint(-x2 <= 0);
bds1.add_constraint(x3 - x2 <= 5);
bds1.add_constraint(x4 - x3 <= -6);
bds1.add_constraint(x1 - x4 <= 5);
bds1.add_constraint(x5 - x4 <= 2);
bds1.add_constraint(-x5 <= -5);
bds1.add_constraint(x3 - x5 <= 7);
bool empty = bds1.is_empty();
nout << "*** bds1.is_empty() ***" << endl;
nout << (empty ? "true" : "false") << endl;
bds2.add_constraint(x1 <= 3);
bds2.add_constraint(x4 <= 3);
bds2.add_constraint(x2 - x1 <= 0);
bds2.add_constraint(x3 - x1 <= 2);
bds2.add_constraint(x5 - x1 <= 2);
bds2.add_constraint(-x2 <= 0);
bds2.add_constraint(x3 - x2 <= 5);
bds2.add_constraint(x4 - x3 <= 6);
bds2.add_constraint(x1 - x4 <= 5);
bds2.add_constraint(x5 - x4 <= 2);
bds2.add_constraint(-x5 <= 5);
bds2.add_constraint(x3 - x5 <= 7);
bool empty1 = bds2.is_empty();
nout << "*** bds2.is_empty() ***" << endl;
nout << (empty1 ? "true" : "false") << endl;
return !empty1 && empty;
}
bool
test04() {
Variable A(0);
Variable B(1);
Variable C(2);
TBD_Shape bds(3);
bds.add_constraint(A == 0);
bds.add_constraint(C >= 0);
bds.add_constraint(B - C >= 1);
bool empty = bds.is_empty();
print_constraints(bds, "*** bds ***");
nout << "*** bds.is_empty() ***"
<< endl
<< (empty ? "true" : "false") << endl;
return !empty;
}
bool
test05() {
Variable x1(0);
Variable x2(1);
Variable x3(2);
Variable x4(3);
Variable x5(4);
TBD_Shape bds(5);
Coefficient a;
if (std::numeric_limits<Coefficient>::is_bounded)
a = -(std::numeric_limits<Coefficient>::min()/2) + 1;
else
a = 1300000000;
bds.add_constraint(x1 - x2 <= -a);
bds.add_constraint(x2 - x3 <= -a);
bds.add_constraint(x3 - x4 <= a);
bds.add_constraint(x4 - x5 <= a);
bds.add_constraint(x5 - x1 <= a);
print_constraints(bds, "*** bds ***");
bool empty = bds.is_empty();
nout << "*** bds.is_empty() ***" << endl;
nout << (empty ? "true" : "false") << endl;
return !empty;
}
} // namespace
BEGIN_MAIN
DO_TEST(test01);
DO_TEST(test02);
DO_TEST(test03);
DO_TEST(test04);
DO_TEST(test05);
END_MAIN
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