Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:02:57 2013 Optimize a model with 19888 rows, 19448 columns and 77528 nonzeros Presolve removed 44 rows and 0 columns Presolve time: 0.08s Presolved: 19844 rows, 19448 columns, 77484 nonzeros Variable types: 19404 continuous, 44 integer (44 binary) Root relaxation: objective 4.024637e+04, 2728 iterations, 0.84 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 40246.3656 0 42 - 40246.3656 - - 1s H 0 0 52415.000000 40246.3656 23.2% - 1s 0 0 46230.2721 0 3 52415.0000 46230.2721 11.8% - 2s H 0 0 46938.349190 46230.2721 1.51% - 2s H 0 0 46451.000000 46230.2721 0.48% - 2s H 0 0 46390.000000 46230.2721 0.34% - 2s 0 0 46339.6889 0 2 46390.0000 46339.6889 0.11% - 2s 0 0 46339.7273 0 1 46390.0000 46339.7273 0.11% - 2s 0 2 46346.2032 0 1 46390.0000 46346.2032 0.09% - 3s * 2 1 2 46388.000000 46351.4520 0.08% 78.5 3s Cutting planes: Implied bound: 39 Explored 4 nodes (4531 simplex iterations) in 3.08 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.638800000000e+04, best bound 4.638800000000e+04, gap 0.0%