Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:53:48 2013 Optimize a model with 43030 rows, 42380 columns and 169130 nonzeros Presolve removed 65 rows and 0 columns Presolve time: 0.19s Presolved: 42965 rows, 42380 columns, 169065 nonzeros Variable types: 42315 continuous, 65 integer (65 binary) Root relaxation: objective 5.811102e+04, 5963 iterations, 3.26 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 58111.0223 0 53 - 58111.0223 - - 3s H 0 0 95765.000000 58111.0223 39.3% - 5s 0 0 71655.1209 0 13 95765.0000 71655.1209 25.2% - 11s H 0 0 94041.838651 71655.1209 23.8% - 11s H 0 0 80776.000000 71655.1209 11.3% - 11s 0 0 75585.4422 0 5 80776.0000 75585.4422 6.43% - 12s H 0 0 79172.882776 75585.4422 4.53% - 12s H 0 0 77635.000000 75585.4422 2.64% - 12s H 0 0 76048.000000 75585.4422 0.61% - 13s 0 2 75615.9252 0 5 76048.0000 75615.9252 0.57% - 13s * 14 7 13 75995.000000 75690.1471 0.40% 126 14s 15 8 75769.1603 2 2 75995.0000 75696.6588 0.39% 132 15s * 19 9 6 75838.000000 75696.6588 0.19% 115 15s * 25 4 4 75754.000000 75726.8227 0.04% 96.6 15s Cutting planes: Implied bound: 62 Explored 29 nodes (13860 simplex iterations) in 15.35 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.575400000000e+04, best bound 7.574977358491e+04, gap 0.0056%