Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:13:59 2013 Optimize a model with 48438 rows, 47748 columns and 190578 nonzeros Presolve removed 69 rows and 0 columns Presolve time: 0.21s Presolved: 48369 rows, 47748 columns, 190509 nonzeros Variable types: 47679 continuous, 69 integer (69 binary) Root relaxation: objective 5.753659e+04, 5910 iterations, 4.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 57536.5875 0 57 - 57536.5875 - - 4s H 0 0 92178.000000 57536.5875 37.6% - 7s 0 0 71506.1174 0 11 92178.0000 71506.1174 22.4% - 12s H 0 0 88721.594276 71506.1174 19.4% - 13s H 0 0 80035.000000 71506.1174 10.7% - 13s 0 0 74574.4394 0 9 80035.0000 74574.4394 6.82% - 14s H 0 0 79718.000000 74574.4394 6.45% - 14s 0 0 74574.9876 0 6 79718.0000 74574.9876 6.45% - 14s H 0 0 77805.000000 74574.9876 4.15% - 14s H 0 0 74753.000000 74574.9876 0.24% - 14s 0 0 74599.2899 0 5 74753.0000 74599.2899 0.21% - 15s 0 2 74599.5998 0 5 74753.0000 74599.5998 0.21% - 16s Cutting planes: Implied bound: 62 Explored 14 nodes (13521 simplex iterations) in 16.85 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.475300000000e+04, best bound 7.474555501437e+04, gap 0.0100%