Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:00:35 2012 Optimize a model with 9111 rows, 1190 columns and 28354 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.10s Presolved: 9143 rows, 1188 columns, 31168 nonzeros Variable types: 0 continuous, 1188 integer (1188 binary) Found heuristic solution: objective 34.0000000 Root relaxation: objective 3.361702e+00, 6321 iterations, 0.48 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.36170 0 1107 34.00000 3.36170 90.1% - 1s 0 0 4.00000 0 123 34.00000 4.00000 88.2% - 2s H 0 0 23.0000000 4.00000 82.6% - 2s H 0 0 9.0000000 4.00000 55.6% - 2s 0 0 4.66667 0 860 9.00000 4.66667 48.1% - 2s 0 0 4.70445 0 1019 9.00000 4.70445 47.7% - 2s H 0 0 8.0000000 4.70445 41.2% - 2s 0 0 4.71111 0 898 8.00000 4.71111 41.1% - 3s 0 0 4.71111 0 886 8.00000 4.71111 41.1% - 3s 0 0 4.71125 0 901 8.00000 4.71125 41.1% - 3s 0 0 4.71125 0 795 8.00000 4.71125 41.1% - 4s 0 2 4.71228 0 795 8.00000 4.71228 41.1% - 6s 81 45 5.66667 9 90 8.00000 5.00000 37.5% 171 10s 1011 76 6.00000 16 795 8.00000 6.00000 25.0% 60.9 17s 1013 77 6.00000 16 132 8.00000 6.00000 25.0% 60.7 20s 1014 78 6.00000 20 145 8.00000 6.00000 25.0% 60.7 25s 1015 79 6.00000 14 152 8.00000 6.00000 25.0% 60.6 32s 1016 79 6.05556 14 194 8.00000 6.05556 24.3% 60.6 35s * 1017 75 14 7.0000000 7.00000 0.0% 60.5 39s Cutting planes: Gomory: 6 Clique: 10 Zero half: 12 Explored 1017 nodes (122633 simplex iterations) in 39.29 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.000000000000e+00, best bound 7.000000000000e+00, gap 0.0%