Gurobi 5.0.1 (linux64) logging started Thu Jan 17 23:16:32 2013 Optimize a model with 280 rows, 4100 columns and 8200 nonzeros Presolve removed 20 rows and 20 columns Presolve time: 0.01s Presolved: 320 rows, 4120 columns, 8260 nonzeros Variable types: 4080 continuous, 40 integer (40 binary) Root relaxation: objective 3.839329e+04, 392 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 38393.2919 0 4 - 38393.2919 - - 0s H 0 0 39415.462950 38393.2919 2.59% - 0s H 0 0 38794.995927 38393.2919 1.04% - 0s 0 0 38496.1491 0 4 38794.9959 38496.1491 0.77% - 0s 0 0 38500.3491 0 4 38794.9959 38500.3491 0.76% - 0s 0 0 38504.3491 0 4 38794.9959 38504.3491 0.75% - 0s 0 0 38504.7541 0 4 38794.9959 38504.7541 0.75% - 0s 0 0 38504.7541 0 4 38794.9959 38504.7541 0.75% - 0s 0 0 38504.7541 0 4 38794.9959 38504.7541 0.75% - 0s 0 0 38504.7541 0 4 38794.9959 38504.7541 0.75% - 0s H 0 0 38621.831495 38504.7541 0.30% - 0s 0 2 38527.0710 0 4 38621.8315 38527.0710 0.25% - 0s Cutting planes: Flow cover: 8 Explored 5 nodes (715 simplex iterations) in 0.11 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.862183149486e+04, best bound 3.862183149486e+04, gap 0.0%