Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:16:14 2013 Optimize a model with 440 rows, 4340 columns and 9520 nonzeros Presolve removed 20 rows and 20 columns Presolve time: 0.01s Presolved: 420 rows, 4320 columns, 9300 nonzeros Variable types: 4240 continuous, 80 integer (80 binary) Root relaxation: objective 3.573401e+04, 504 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 35734.0139 0 9 - 35734.0139 - - 0s 0 0 35760.5201 0 9 - 35760.5201 - - 0s 0 0 35760.7026 0 9 - 35760.7026 - - 0s 0 0 35767.5503 0 9 - 35767.5503 - - 0s 0 0 35769.0817 0 9 - 35769.0817 - - 0s 0 0 35771.1952 0 9 - 35771.1952 - - 0s 0 0 35772.8274 0 9 - 35772.8274 - - 0s 0 0 35773.1456 0 9 - 35773.1456 - - 0s 0 0 35775.3051 0 9 - 35775.3051 - - 0s 0 0 35775.3051 0 9 - 35775.3051 - - 0s 0 0 35775.4963 0 9 - 35775.4963 - - 0s 0 0 35775.4963 0 9 - 35775.4963 - - 0s H 0 0 36173.213881 35775.4963 1.10% - 0s 0 1 35854.2081 0 6 36173.2139 35854.2081 0.88% - 0s Cutting planes: Flow cover: 18 Explored 9 nodes (1219 simplex iterations) in 0.22 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.617321388123e+04, best bound 3.616991635074e+04, gap 0.0091%