Gurobi 5.0.1 (linux64) logging started Fri Nov 16 05:39:37 2012 Optimize a model with 7974 rows, 3080 columns and 26728 nonzeros Presolve removed 40 rows and 2 columns Presolve time: 0.17s Presolved: 7989 rows, 3078 columns, 29392 nonzeros Variable types: 0 continuous, 3078 integer (3078 binary) Found heuristic solution: objective 55.0000000 Root relaxation: objective 2.333333e+00, 5040 iterations, 0.54 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.33333 0 137 55.00000 2.33333 95.8% - 2s H 0 0 45.0000000 2.33333 94.8% - 2s H 0 0 5.0000000 2.33333 53.3% - 2s 0 0 3.00000 0 274 5.00000 3.00000 40.0% - 3s H 0 0 4.0000000 3.00000 25.0% - 3s 0 0 3.00000 0 1131 4.00000 3.00000 25.0% - 3s 0 0 3.00000 0 355 4.00000 3.00000 25.0% - 7s 0 0 3.00000 0 112 4.00000 3.00000 25.0% - 8s 0 0 3.00000 0 113 4.00000 3.00000 25.0% - 10s 0 0 3.00000 0 86 4.00000 3.00000 25.0% - 10s 0 0 3.00000 0 110 4.00000 3.00000 25.0% - 11s 0 0 3.00000 0 95 4.00000 3.00000 25.0% - 14s 0 0 3.00000 0 118 4.00000 3.00000 25.0% - 16s 0 0 3.00000 0 109 4.00000 3.00000 25.0% - 18s 0 2 3.00000 0 78 4.00000 3.00000 25.0% - 22s 4 4 3.00000 1 143 4.00000 3.00000 25.0% 2409 29s 5 5 3.00000 1 77 4.00000 3.00000 25.0% 1927 33s 6 6 3.00000 1 70 4.00000 3.00000 25.0% 1606 35s 8 7 3.00000 1 111 4.00000 3.00000 25.0% 1204 41s 9 8 3.00000 1 81 4.00000 3.00000 25.0% 1071 45s 11 9 3.00000 1 129 4.00000 3.00000 25.0% 876 56s 14 13 3.00000 16 109 4.00000 3.00000 25.0% 10458 66s 15 14 3.00000 16 111 4.00000 3.00000 25.0% 9894 70s 18 12 3.00000 17 103 4.00000 3.00000 25.0% 8509 76s Cutting planes: Gomory: 6 Zero half: 57 Explored 22 nodes (258748 simplex iterations) in 78.09 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%