Gurobi 5.0.1 (linux64) logging started Fri Nov 16 10:09:34 2012 Optimize a model with 13935 rows, 4556 columns and 46027 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.43s Presolved: 14000 rows, 4554 columns, 50100 nonzeros Variable types: 0 continuous, 4554 integer (4554 binary) Found heuristic solution: objective 66.0000000 Root relaxation: objective 2.000000e+00, 3312 iterations, 0.11 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 134 66.00000 2.00000 97.0% - 0s H 0 0 61.0000000 2.00000 96.7% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 600 5.00000 2.66667 46.7% - 2s H 0 0 4.0000000 2.66667 33.3% - 3s 0 0 2.66667 0 2892 4.00000 2.66667 33.3% - 3s 0 0 2.66667 0 213 4.00000 2.66667 33.3% - 8s 0 0 2.67358 0 3481 4.00000 2.67358 33.2% - 11s 0 0 2.67358 0 3561 4.00000 2.67358 33.2% - 12s 0 0 2.67358 0 3458 4.00000 2.67358 33.2% - 14s 0 0 2.67358 0 3587 4.00000 2.67358 33.2% - 16s 0 0 2.67358 0 3603 4.00000 2.67358 33.2% - 17s 0 0 2.67358 0 3585 4.00000 2.67358 33.2% - 19s 0 0 2.67358 0 3411 4.00000 2.67358 33.2% - 21s 0 0 2.67358 0 3432 4.00000 2.67358 33.2% - 22s 0 0 2.67358 0 3332 4.00000 2.67358 33.2% - 24s 0 0 2.67358 0 3500 4.00000 2.67358 33.2% - 25s 0 0 2.67358 0 3473 4.00000 2.67358 33.2% - 27s 0 1 3.00000 0 3473 4.00000 3.00000 25.0% - 32s Cutting planes: Clique: 96 Zero half: 4 Explored 4 nodes (76002 simplex iterations) in 32.51 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%