Gurobi 5.0.1 (linux64) logging started Mon Feb 4 18:54:14 2013 Optimize a model with 18472 rows, 2304 columns and 56448 nonzeros Presolve removed 4904 rows and 1257 columns Presolve time: 0.12s Presolved: 13568 rows, 1047 columns, 41199 nonzeros Variable types: 11 continuous, 1036 integer (1036 binary) Found heuristic solution: objective 49026.000000 Root relaxation: objective 4.262371e+04, 2291 iterations, 0.11 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 42623.7083 0 11 49026.0000 42623.7083 13.1% - 0s H 0 0 42643.000000 42623.7083 0.05% - 0s H 0 0 42632.000000 42623.7083 0.02% - 0s 0 0 42625.1667 0 17 42632.0000 42625.1667 0.02% - 0s 0 0 42625.1667 0 9 42632.0000 42625.1667 0.02% - 0s 0 0 42625.1667 0 16 42632.0000 42625.1667 0.02% - 0s 0 0 42626.3367 0 29 42632.0000 42626.3367 0.01% - 0s 0 1 42626.3385 0 29 42632.0000 42626.3385 0.01% - 0s H 1 1 42630.000000 42626.3385 0.01% 0.0 0s Explored 2 nodes (2527 simplex iterations) in 0.46 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.263000000000e+04, best bound 4.262700000000e+04, gap 0.0070%