Gurobi 5.0.1 (linux64) logging started Wed Apr 24 12:56:46 2013 Optimize a model with 2420 rows, 484220 columns and 968220 nonzeros Presolve time: 1.41s Presolved: 2420 rows, 484220 columns, 968220 nonzeros Variable types: 484000 continuous, 220 integer (220 binary) Root relaxation: objective 4.457264e+05, 13404 iterations, 2.64 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 445726.444 0 2 - 445726.444 - - 4s H 0 0 448783.00000 445726.444 0.68% - 5s 0 0 445798.931 0 2 448783.000 445798.931 0.66% - 6s 0 0 445798.931 0 2 448783.000 445798.931 0.66% - 9s 0 0 445798.983 0 2 448783.000 445798.983 0.66% - 10s 0 0 445817.381 0 2 448783.000 445817.381 0.66% - 11s 0 0 445817.888 0 2 448783.000 445817.888 0.66% - 11s 0 0 445818.346 0 2 448783.000 445818.346 0.66% - 12s 0 0 445818.484 0 2 448783.000 445818.484 0.66% - 12s 0 0 445818.484 0 2 448783.000 445818.484 0.66% - 13s 0 0 445818.484 0 2 448783.000 445818.484 0.66% - 13s 0 2 445847.939 0 2 448783.000 445847.939 0.65% - 15s H 6 6 446418.00000 445925.878 0.11% 130 17s * 13 3 9 446230.00000 445925.878 0.07% 82.9 18s Cutting planes: Implied bound: 88 Explored 17 nodes (22751 simplex iterations) in 18.73 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.462300000000e+05, best bound 4.461887692308e+05, gap 0.0092%