Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:07:29 2013 Optimize a model with 528 rows, 23088 columns and 46128 nonzeros Presolve time: 0.03s Presolved: 528 rows, 23088 columns, 46128 nonzeros Variable types: 23040 continuous, 48 integer (48 binary) Root relaxation: objective 4.880431e+04, 941 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 48804.3088 0 6 - 48804.3088 - - 0s H 0 0 50403.000000 48804.3088 3.17% - 0s 0 0 49021.0000 0 1 50403.0000 49021.0000 2.74% - 0s H 0 0 49055.000000 49021.0000 0.07% - 0s H 0 0 49034.000000 49021.0000 0.03% - 0s 0 0 49021.0000 0 1 49034.0000 49021.0000 0.03% - 0s 0 0 49021.0000 0 6 49034.0000 49021.0000 0.03% - 0s 0 0 49021.0000 0 1 49034.0000 49021.0000 0.03% - 0s 0 0 49021.0000 0 1 49034.0000 49021.0000 0.03% - 0s 0 0 49021.0000 0 1 49034.0000 49021.0000 0.03% - 0s 0 2 49021.5319 0 1 49034.0000 49021.5319 0.03% - 0s * 1 1 1 49022.000000 49022.0000 0.0% 4.0 0s Cutting planes: Implied bound: 12 Flow cover: 1 Explored 2 nodes (1700 simplex iterations) in 0.39 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.902200000000e+04, best bound 4.902200000000e+04, gap 0.0%