Module: ppl/ppl Branch: master Commit: c4b4cb73d97dc1e901f486c7693c342acff62484 URL: http://www.cs.unipr.it/git/gitweb.cgi?p=ppl/ppl.git;a=commit;h=c4b4cb73d97dc...

Author: François Galea francois.galea@uvsq.fr Date: Thu Mar 4 14:14:05 2010 +0100

Added a test for problem feasibility when incrementally adding parameter constraints.

---

tests/PIP_Problem/pipproblem1.cc | 33 +++++++++++++++++++++++++++++++++ 1 files changed, 33 insertions(+), 0 deletions(-)

diff --git a/tests/PIP_Problem/pipproblem1.cc b/tests/PIP_Problem/pipproblem1.cc index 64deaa0..f8c0821 100644 --- a/tests/PIP_Problem/pipproblem1.cc +++ b/tests/PIP_Problem/pipproblem1.cc @@ -634,6 +634,38 @@ test21() { return ok; }

+bool +test22() { + // Same problem as test02, but incrementally adding two parameter constraints + // making the problem infeasible. + Variable i(0); + Variable j(1); + Variable n(2); + Variable m(3); + Variables_Set params(n, m); + + Constraint_System cs; + cs.insert(3*j >= -2*i+8); + cs.insert(j <= 4*i - 4); + cs.insert(j <= m); + cs.insert(i <= n); + + PIP_Problem pip(cs.space_dimension(), cs.begin(), cs.end(), params); + + bool ok = (pip.solve() == OPTIMIZED_PIP_PROBLEM); + if (ok) { + const PIP_Tree solution = pip.solution(); + ok &= solution->OK(); + pip.print_solution(nout); + } + + pip.add_constraint(7*m < 12); + pip.add_constraint(2*n + 3*m < 8); + ok &= (pip.solve() == UNFEASIBLE_PIP_PROBLEM); + + return ok; +} + } // namespace

BEGIN_MAIN @@ -658,4 +690,5 @@ BEGIN_MAIN DO_TEST_F8(test19); DO_TEST(test20); DO_TEST(test21); + DO_TEST(test22); END_MAIN