Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:40:22 2013 Optimize a model with 52 rows, 158 columns and 924 nonzeros Presolve removed 22 rows and 24 columns Presolve time: 0.00s Presolved: 30 rows, 134 columns, 778 nonzeros Variable types: 122 continuous, 12 integer (12 binary) Root relaxation: objective 3.881594e+03, 13 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3881.59364 0 3 - 3881.59364 - - 0s 0 0 3881.86365 0 3 - 3881.86365 - - 0s 0 0 3884.57077 0 3 - 3884.57077 - - 0s 0 0 3884.66522 0 4 - 3884.66522 - - 0s 0 0 3884.75228 0 4 - 3884.75228 - - 0s 0 0 3884.75228 0 4 - 3884.75228 - - 0s H 0 0 3897.0897408 3884.75228 0.32% - 0s H 0 0 3893.8897177 3884.75228 0.23% - 0s 0 0 3884.75228 0 3 3893.88972 3884.75228 0.23% - 0s 0 0 3893.73860 0 1 3893.88972 3893.73860 0.00% - 0s Cutting planes: Gomory: 1 Implied bound: 1 Flow cover: 3 Explored 0 nodes (71 simplex iterations) in 0.03 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.893889717662e+03, best bound 3.893738598799e+03, gap 0.0039%