Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:38:52 2013 Optimize a model with 37942 rows, 37332 columns and 148962 nonzeros Presolve removed 61 rows and 0 columns Presolve time: 0.16s Presolved: 37881 rows, 37332 columns, 148901 nonzeros Variable types: 37271 continuous, 61 integer (61 binary) Root relaxation: objective 4.779991e+04, 4156 iterations, 1.61 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 47799.9054 0 48 - 47799.9054 - - 1s H 0 0 62470.000000 47799.9054 23.5% - 2s 0 0 53797.2324 0 9 62470.0000 53797.2324 13.9% - 5s H 0 0 59846.369073 53797.2324 10.1% - 5s H 0 0 57404.000000 53797.2324 6.28% - 5s 0 0 54465.3558 0 6 57404.0000 54465.3558 5.12% - 6s H 0 0 56910.000000 54465.3558 4.30% - 6s 0 0 54623.5331 0 5 56910.0000 54623.5331 4.02% - 6s H 0 0 56290.000000 54623.5331 2.96% - 6s H 0 0 55034.000000 54623.5331 0.75% - 7s 0 2 54623.9160 0 5 55034.0000 54623.9160 0.75% - 7s H 9 5 55000.380952 54710.1658 0.53% 147 8s * 11 5 9 54886.000000 54710.1658 0.32% 139 8s * 17 4 5 54838.000000 54729.9249 0.20% 144 8s Cutting planes: Implied bound: 54 Explored 24 nodes (10137 simplex iterations) in 9.24 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.483800000000e+04, best bound 5.483800000000e+04, gap 0.0%