Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:55:58 2013 Optimize a model with 280 rows, 4460 columns and 9280 nonzeros Presolve removed 20 rows and 20 columns Presolve time: 0.01s Presolved: 260 rows, 4440 columns, 8860 nonzeros Variable types: 4440 continuous, 0 integer (0 binary) Root relaxation: objective 4.370285e+04, 519 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 43702.8549 0 2 - 43702.8549 - - 0s 0 2 43702.8549 0 2 - 43702.8549 - - 0s * 24 18 12 44103.040138 43852.1529 0.57% 12.8 0s * 38 15 8 44051.370957 43878.1255 0.39% 10.3 0s * 50 7 8 43900.745969 43896.9453 0.01% 8.7 0s Explored 51 nodes (953 simplex iterations) in 0.09 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.390074596881e+04, best bound 4.389694531587e+04, gap 0.0087%