Gurobi 5.0.1 (linux64) logging started Wed Apr 24 13:18:59 2013 Optimize a model with 2640 rows, 576240 columns and 1152240 nonzeros Presolve time: 2.19s Presolved: 2640 rows, 576240 columns, 1152240 nonzeros Variable types: 576000 continuous, 240 integer (240 binary) Root relaxation: objective 6.299695e+05, 18702 iterations, 3.41 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 629969.535 0 6 - 629969.535 - - 6s H 0 0 652362.00000 629969.535 3.43% - 8s H 0 0 645270.00000 629969.535 2.37% - 9s 0 0 630298.150 0 4 645270.000 630298.150 2.32% - 12s 0 0 630312.925 0 4 645270.000 630312.925 2.32% - 14s 0 0 630312.925 0 4 645270.000 630312.925 2.32% - 15s 0 0 630312.925 0 4 645270.000 630312.925 2.32% - 17s 0 0 630312.925 0 6 645270.000 630312.925 2.32% - 27s 0 0 630312.925 0 4 645270.000 630312.925 2.32% - 31s 0 0 630312.925 0 4 645270.000 630312.925 2.32% - 32s 0 0 630312.925 0 4 645270.000 630312.925 2.32% - 33s 0 0 630312.925 0 4 645270.000 630312.925 2.32% - 34s 0 0 630312.925 0 4 645270.000 630312.925 2.32% - 35s H 0 0 632186.00000 630312.925 0.30% - 40s 0 2 630324.716 0 4 632186.000 630324.716 0.29% - 42s 5 7 630638.118 5 1 632186.000 630471.498 0.27% 239 45s * 7 7 7 630656.00000 630471.498 0.03% 178 46s Cutting planes: Implied bound: 164 Flow cover: 4 Explored 16 nodes (44233 simplex iterations) in 48.29 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.306560000000e+05, best bound 6.306065846154e+05, gap 0.0078%