Gurobi 5.0.1 (linux64) logging started Fri Nov 16 04:50:01 2012 Optimize a model with 7102 rows, 2862 columns and 23956 nonzeros Presolve removed 1431 rows and 0 columns Presolve time: 0.14s Presolved: 5671 rows, 2862 columns, 20511 nonzeros Variable types: 0 continuous, 2862 integer (2862 binary) Found heuristic solution: objective 32.0000000 Root relaxation: objective 3.000000e+00, 5039 iterations, 0.51 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 88 32.00000 3.00000 90.6% - 1s H 0 0 4.0000000 3.00000 25.0% - 1s 0 0 3.00000 0 195 4.00000 3.00000 25.0% - 1s 0 0 3.00000 0 110 4.00000 3.00000 25.0% - 3s 0 0 3.00000 0 114 4.00000 3.00000 25.0% - 5s 0 0 3.00000 0 140 4.00000 3.00000 25.0% - 7s 0 0 3.00000 0 163 4.00000 3.00000 25.0% - 9s 0 0 3.00000 0 148 4.00000 3.00000 25.0% - 10s 0 2 3.00000 0 148 4.00000 3.00000 25.0% - 13s 4 4 3.00000 1 95 4.00000 3.00000 25.0% 833 16s 6 6 3.00000 1 128 4.00000 3.00000 25.0% 556 20s 7 6 3.00000 1 164 4.00000 3.00000 25.0% 476 25s 10 8 infeasible 10 4.00000 3.00000 25.0% 6432 30s 13 10 3.00000 11 81 4.00000 3.00000 25.0% 5119 35s 24 12 3.00000 16 86 4.00000 3.00000 25.0% 3108 40s 48 5 infeasible 16 4.00000 3.00000 25.0% 2055 45s Cutting planes: Gomory: 5 Zero half: 7 Explored 62 nodes (175737 simplex iterations) in 47.73 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%