Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:54:02 2012 Optimize a model with 5028 rows, 2256 columns and 17106 nonzeros Presolve removed 1130 rows and 2 columns Presolve time: 0.10s Presolved: 3898 rows, 2254 columns, 14355 nonzeros Variable types: 0 continuous, 2254 integer (2254 binary) Found heuristic solution: objective 47.0000000 Root relaxation: objective 3.000000e+00, 3380 iterations, 0.36 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 1055 47.00000 3.00000 93.6% - 1s H 0 0 28.0000000 3.00000 89.3% - 1s H 0 0 6.0000000 3.00000 50.0% - 1s H 0 0 5.0000000 3.00000 40.0% - 1s 0 0 3.00000 0 91 5.00000 3.00000 40.0% - 1s H 0 0 4.0000000 3.00000 25.0% - 1s 0 0 3.00000 0 112 4.00000 3.00000 25.0% - 2s 0 0 3.00000 0 72 4.00000 3.00000 25.0% - 3s 0 0 3.00000 0 72 4.00000 3.00000 25.0% - 4s 0 0 3.00000 0 89 4.00000 3.00000 25.0% - 5s 0 0 3.00000 0 64 4.00000 3.00000 25.0% - 6s 0 0 3.00000 0 62 4.00000 3.00000 25.0% - 7s 0 0 3.00000 0 62 4.00000 3.00000 25.0% - 8s 0 0 3.00000 0 62 4.00000 3.00000 25.0% - 8s 0 2 3.00000 0 58 4.00000 3.00000 25.0% - 10s 7 6 3.00000 1 97 4.00000 3.00000 25.0% 604 15s 11 11 3.00000 12 544 4.00000 3.00000 25.0% 5473 30s Cutting planes: Gomory: 3 Zero half: 8 Explored 17 nodes (119405 simplex iterations) in 31.49 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%