Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:36:37 2013 Optimize a model with 37881 rows, 37271 columns and 148901 nonzeros Presolve removed 2507 rows and 0 columns Presolve time: 0.21s Presolved: 35374 rows, 37271 columns, 143887 nonzeros Variable types: 37210 continuous, 61 integer (61 binary) Root relaxation: objective 6.304166e+04, 6745 iterations, 1.03 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 63041.6626 0 2 - 63041.6626 - - 1s H 0 0 63934.000000 63041.6626 1.40% - 1s H 0 0 63051.000000 63041.6626 0.01% - 1s 0 0 63042.3886 0 2 63051.0000 63042.3886 0.01% - 1s 0 0 63042.3886 0 1 63051.0000 63042.3886 0.01% - 2s 0 0 63048.1978 0 2 63051.0000 63048.1978 0.00% - 2s Cutting planes: Gomory: 1 Explored 0 nodes (8358 simplex iterations) in 2.45 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.305100000000e+04, best bound 6.304819781302e+04, gap 0.0044%