Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:00:19 2013 Optimize a model with 44352 rows, 43692 columns and 174372 nonzeros Presolve removed 66 rows and 0 columns Presolve time: 0.19s Presolved: 44286 rows, 43692 columns, 174306 nonzeros Variable types: 43626 continuous, 66 integer (66 binary) Root relaxation: objective 5.795526e+04, 6566 iterations, 4.21 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 57955.2618 0 56 - 57955.2618 - - 4s H 0 0 91839.000000 57955.2618 36.9% - 6s 0 0 74004.0247 0 8 91839.0000 74004.0247 19.4% - 12s H 0 0 82891.447389 74004.0247 10.7% - 12s H 0 0 78548.000000 74004.0247 5.78% - 12s 0 0 75260.9344 0 5 78548.0000 75260.9344 4.18% - 13s H 0 0 77576.804203 75260.9344 2.99% - 13s H 0 0 76977.000000 75260.9344 2.23% - 13s H 0 0 76289.000000 75260.9344 1.35% - 13s 0 0 75264.2542 0 5 76289.0000 75264.2542 1.34% - 13s 0 0 75267.2274 0 4 76289.0000 75267.2274 1.34% - 13s H 0 0 75719.000000 75267.2274 0.60% - 14s 0 2 75270.5094 0 4 75719.0000 75270.5094 0.59% - 14s 1 3 75300.1359 1 3 75719.0000 75300.1359 0.55% 132 15s H 22 6 75622.000000 75368.2089 0.34% 168 16s * 24 6 10 75580.000000 75368.2089 0.28% 161 16s Cutting planes: Implied bound: 61 Explored 36 nodes (18436 simplex iterations) in 17.60 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.558000000000e+04, best bound 7.558000000000e+04, gap 0.0%