Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:00:32 2013 Optimize a model with 462 rows, 17682 columns and 35322 nonzeros Presolve time: 0.03s Presolved: 462 rows, 17682 columns, 35322 nonzeros Variable types: 17640 continuous, 42 integer (42 binary) Root relaxation: objective 3.796731e+04, 560 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 37967.3123 0 6 - 37967.3123 - - 0s H 0 0 39508.000000 37967.3123 3.90% - 0s 0 0 38429.3496 0 5 39508.0000 38429.3496 2.73% - 0s 0 0 38464.2790 0 4 39508.0000 38464.2790 2.64% - 0s 0 0 38473.4826 0 4 39508.0000 38473.4826 2.62% - 0s 0 0 38476.4014 0 5 39508.0000 38476.4014 2.61% - 0s 0 0 38479.2880 0 4 39508.0000 38479.2880 2.60% - 0s H 0 0 38739.000000 38479.2880 0.67% - 0s 0 0 38479.2880 0 5 38739.0000 38479.2880 0.67% - 0s 0 0 38597.7819 0 4 38739.0000 38597.7819 0.36% - 0s 0 0 38625.8078 0 2 38739.0000 38625.8078 0.29% - 0s 0 0 38638.3675 0 3 38739.0000 38638.3675 0.26% - 0s 0 0 38645.7606 0 2 38739.0000 38645.7606 0.24% - 0s 0 0 38650.3032 0 2 38739.0000 38650.3032 0.23% - 0s 0 0 38652.9251 0 4 38739.0000 38652.9251 0.22% - 0s 0 0 38656.2883 0 2 38739.0000 38656.2883 0.21% - 0s 0 0 38724.8955 0 1 38739.0000 38724.8955 0.04% - 0s 0 1 38729.0000 0 1 38739.0000 38729.0000 0.03% - 0s Cutting planes: Implied bound: 53 Flow cover: 1 Explored 2 nodes (1713 simplex iterations) in 0.61 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.873900000000e+04, best bound 3.873900000000e+04, gap 0.0%