Gurobi 5.0.1 (linux64) logging started Thu Jan 17 23:16:22 2013 Optimize a model with 320 rows, 4160 columns and 8340 nonzeros Presolve removed 40 rows and 60 columns Presolve time: 0.01s Presolved: 280 rows, 4100 columns, 8200 nonzeros Variable types: 4080 continuous, 20 integer (20 binary) Root relaxation: objective 3.839329e+04, 379 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 2 - 38393.2919 - - 0s H 0 0 38794.995927 38393.2919 1.04% - 0s 0 0 38495.6062 0 2 38794.9959 38495.6062 0.77% - 0s 0 0 38500.4062 0 2 38794.9959 38500.4062 0.76% - 0s 0 0 38505.0062 0 2 38794.9959 38505.0062 0.75% - 0s 0 0 38505.6068 0 2 38794.9959 38505.6068 0.75% - 0s 0 0 38506.3017 0 2 38794.9959 38506.3017 0.74% - 0s 0 0 38506.7589 0 2 38794.9959 38506.7589 0.74% - 0s 0 0 38506.7589 0 2 38794.9959 38506.7589 0.74% - 0s H 0 0 38621.831495 38506.7589 0.30% - 0s 0 2 38526.8460 0 2 38621.8315 38526.8460 0.25% - 0s Cutting planes: Flow cover: 10 Explored 5 nodes (562 simplex iterations) in 0.09 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%