Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:08:59 2012 Optimize a model with 2276 rows, 1122 columns and 7786 nonzeros Presolve removed 497 rows and 2 columns Presolve time: 0.09s Presolved: 1779 rows, 1120 columns, 6457 nonzeros Variable types: 0 continuous, 1120 integer (1120 binary) Found heuristic solution: objective 33.0000000 Root relaxation: objective 3.000000e+00, 1338 iterations, 0.06 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 61 33.00000 3.00000 90.9% - 0s H 0 0 6.0000000 3.00000 50.0% - 0s H 0 0 5.0000000 3.00000 40.0% - 0s 0 0 3.00000 0 95 5.00000 3.00000 40.0% - 0s H 0 0 4.0000000 3.00000 25.0% - 0s 0 0 3.00000 0 49 4.00000 3.00000 25.0% - 0s 0 0 3.00000 0 59 4.00000 3.00000 25.0% - 1s 0 0 3.00000 0 57 4.00000 3.00000 25.0% - 1s 0 0 3.00000 0 82 4.00000 3.00000 25.0% - 1s 0 0 3.00000 0 53 4.00000 3.00000 25.0% - 1s 0 0 3.00000 0 55 4.00000 3.00000 25.0% - 2s 0 0 3.00000 0 32 4.00000 3.00000 25.0% - 2s 0 0 3.00000 0 39 4.00000 3.00000 25.0% - 2s 0 0 3.00000 0 39 4.00000 3.00000 25.0% - 2s 0 2 3.00000 0 39 4.00000 3.00000 25.0% - 2s 8 7 3.00000 1 77 4.00000 3.00000 25.0% 88.4 5s Cutting planes: Gomory: 3 Clique: 2 Zero half: 5 Explored 22 nodes (68094 simplex iterations) in 9.45 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%