Gurobi 5.0.1 (linux64) logging started Wed Apr 24 03:28:45 2013 Optimize a model with 869 rows, 62489 columns and 124899 nonzeros Presolve time: 0.10s Presolved: 869 rows, 62489 columns, 124899 nonzeros Variable types: 62410 continuous, 79 integer (79 binary) Root relaxation: objective 9.037891e+04, 2632 iterations, 0.09 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 90378.9085 0 8 - 90378.9085 - - 0s H 0 0 96221.000000 90378.9085 6.07% - 0s H 0 0 92626.000000 90378.9085 2.43% - 0s 0 0 90695.3775 0 4 92626.0000 90695.3775 2.08% - 0s 0 0 90715.9355 0 5 92626.0000 90715.9355 2.06% - 0s 0 0 90721.4893 0 4 92626.0000 90721.4893 2.06% - 0s 0 0 90721.8407 0 4 92626.0000 90721.8407 2.06% - 0s 0 0 90721.8407 0 4 92626.0000 90721.8407 2.06% - 1s 0 0 90721.8407 0 4 92626.0000 90721.8407 2.06% - 1s 0 0 90721.8407 0 8 92626.0000 90721.8407 2.06% - 1s 0 0 90721.8407 0 4 92626.0000 90721.8407 2.06% - 1s 0 0 90721.8407 0 5 92626.0000 90721.8407 2.06% - 1s 0 0 90721.8407 0 4 92626.0000 90721.8407 2.06% - 2s 0 0 90721.8407 0 4 92626.0000 90721.8407 2.06% - 2s 0 0 90721.8407 0 4 92626.0000 90721.8407 2.06% - 2s 0 0 90721.8407 0 4 92626.0000 90721.8407 2.06% - 2s 0 2 90726.6835 0 4 92626.0000 90726.6835 2.05% - 2s H 1 1 91814.778711 90726.6835 1.19% 0.0 2s H 4 4 91618.227273 90788.5744 0.91% 102 2s H 5 5 91546.000000 90788.8235 0.83% 90.4 2s H 6 6 91513.000000 90788.8235 0.79% 79.5 3s H 7 6 90905.000000 90788.8235 0.13% 70.1 3s * 8 5 7 90869.000000 90788.8235 0.09% 67.8 3s Cutting planes: Implied bound: 97 Flow cover: 3 Explored 16 nodes (6340 simplex iterations) in 3.12 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.086900000000e+04, best bound 9.086900000000e+04, gap 0.0%