Gurobi 5.0.1 (linux64) logging started Fri Jan 18 04:02:43 2013 Optimize a model with 60 rows, 1084 columns and 8914 nonzeros Presolve removed 22 rows and 248 columns Presolve time: 0.03s Presolved: 38 rows, 836 columns, 8070 nonzeros Variable types: 820 continuous, 16 integer (16 binary) Root relaxation: objective 4.810927e+03, 18 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 4810.92679 0 10 - 4810.92679 - - 0s 0 0 4813.21547 0 10 - 4813.21547 - - 0s 0 0 4813.55088 0 10 - 4813.55088 - - 0s 0 0 4814.78748 0 5 - 4814.78748 - - 0s 0 0 4814.78748 0 5 - 4814.78748 - - 0s H 0 0 4836.4084944 4814.78748 0.45% - 0s 0 0 4829.01748 0 8 4836.40849 4829.01748 0.15% - 0s 0 0 4829.06403 0 14 4836.40849 4829.06403 0.15% - 0s 0 0 4829.08486 0 14 4836.40849 4829.08486 0.15% - 0s 0 0 4829.08508 0 14 4836.40849 4829.08508 0.15% - 0s 0 0 4829.79006 0 9 4836.40849 4829.79006 0.14% - 0s 0 0 4829.79006 0 9 4836.40849 4829.79006 0.14% - 0s 0 2 4829.98112 0 9 4836.40849 4829.98112 0.13% - 0s * 9 8 9 4831.3369111 4829.98112 0.03% 4.1 0s Cutting planes: Gomory: 2 Implied bound: 1 Flow cover: 3 Explored 14 nodes (225 simplex iterations) in 0.18 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.831336911133e+03, best bound 4.831113489274e+03, gap 0.0046%