Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:08:00 2013 Optimize a model with 748 rows, 46308 columns and 92548 nonzeros Presolve time: 0.07s Presolved: 748 rows, 46308 columns, 92548 nonzeros Variable types: 46240 continuous, 68 integer (68 binary) Root relaxation: objective 7.278331e+04, 1770 iterations, 0.05 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 72783.3126 0 10 - 72783.3126 - - 0s H 0 0 77919.000000 72783.3126 6.59% - 0s H 0 0 73037.000000 72783.3126 0.35% - 0s 0 0 72893.9657 0 5 73037.0000 72893.9657 0.20% - 0s 0 0 72893.9657 0 10 73037.0000 72893.9657 0.20% - 0s 0 0 72894.9105 0 5 73037.0000 72894.9105 0.19% - 0s 0 0 72911.3484 0 5 73037.0000 72911.3484 0.17% - 0s 0 0 72919.1065 0 5 73037.0000 72919.1065 0.16% - 0s 0 0 72919.4853 0 4 73037.0000 72919.4853 0.16% - 0s 0 0 72919.4853 0 4 73037.0000 72919.4853 0.16% - 0s 0 0 72919.4853 0 4 73037.0000 72919.4853 0.16% - 0s 0 0 72980.0348 0 4 73037.0000 72980.0348 0.08% - 0s 0 0 72988.0065 0 2 73037.0000 72988.0065 0.07% - 1s 0 2 72989.6368 0 2 73037.0000 72989.6368 0.06% - 1s Cutting planes: Implied bound: 48 Flow cover: 1 Explored 7 nodes (3902 simplex iterations) in 1.21 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.303700000000e+04, best bound 7.303700000000e+04, gap 0.0%