Gurobi 5.0.1 (linux64) logging started Fri Jan 18 06:08:04 2013 Optimize a model with 1600 rows, 50600 columns and 326550 nonzeros Presolve removed 50 rows and 50 columns Presolve time: 0.47s Presolved: 1550 rows, 50550 columns, 301500 nonzeros Variable types: 50100 continuous, 450 integer (450 binary) Root relaxation: objective 1.824192e+05, 3198 iterations, 0.19 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 182419.206 0 3 - 182419.206 - - 0s 0 0 182422.333 0 3 - 182422.333 - - 1s 0 0 182425.486 0 5 - 182425.486 - - 1s 0 0 182425.688 0 5 - 182425.688 - - 1s 0 0 182425.855 0 5 - 182425.855 - - 1s 0 0 182425.855 0 5 - 182425.855 - - 2s 0 2 182429.440 0 5 - 182429.440 - - 5s 102 104 182903.557 97 1 - 182518.437 - 8.2 10s * 110 25 105 182905.86630 182518.437 0.21% 7.7 10s H 140 31 182896.43111 182836.684 0.03% 7.3 10s H 167 17 182885.83275 182854.940 0.02% 6.8 11s * 172 20 36 182885.72753 182854.940 0.02% 6.6 11s Cutting planes: Flow cover: 4 Explored 178 nodes (4653 simplex iterations) in 11.13 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.828857275262e+05, best bound 1.828729996445e+05, gap 0.0070%