Gurobi 5.0.1 (linux64) logging started Wed Apr 24 00:51:44 2013 Optimize a model with 209 rows, 3629 columns and 7239 nonzeros Presolve time: 0.00s Presolved: 209 rows, 3629 columns, 7239 nonzeros Variable types: 3610 continuous, 19 integer (19 binary) Root relaxation: objective 1.884466e+04, 245 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 18844.6591 0 3 - 18844.6591 - - 0s H 0 0 19079.000000 18844.6591 1.23% - 0s H 0 0 18939.000000 18844.6591 0.50% - 0s 0 0 cutoff 0 18939.0000 18939.0000 0.0% - 0s Cutting planes: Implied bound: 28 Flow cover: 3 Explored 0 nodes (265 simplex iterations) in 0.02 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.893900000000e+04, best bound 1.893900000000e+04, gap 0.0%