Gurobi 5.0.1 (linux64) logging started Fri Nov 16 06:31:37 2012 Optimize a model with 11019 rows, 3422 columns and 36190 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.26s Presolved: 11075 rows, 3420 columns, 39174 nonzeros Variable types: 0 continuous, 3420 integer (3420 binary) Found heuristic solution: objective 58.0000000 Root relaxation: objective 2.000000e+00, 2506 iterations, 0.08 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 116 58.00000 2.00000 96.6% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 1131 5.00000 2.66667 46.7% - 1s 0 0 2.66667 0 739 5.00000 2.66667 46.7% - 2s H 0 0 4.0000000 2.66667 33.3% - 3s 0 0 2.67066 0 3292 4.00000 2.67066 33.2% - 4s 0 0 2.67066 0 3297 4.00000 2.67066 33.2% - 5s 0 0 2.67066 0 3031 4.00000 2.67066 33.2% - 7s 0 0 2.67066 0 2991 4.00000 2.67066 33.2% - 8s 0 0 2.67066 0 3005 4.00000 2.67066 33.2% - 9s 0 0 2.67066 0 3007 4.00000 2.67066 33.2% - 9s 0 0 2.67066 0 2992 4.00000 2.67066 33.2% - 10s 0 0 2.67066 0 3040 4.00000 2.67066 33.2% - 10s 0 0 2.67066 0 3038 4.00000 2.67066 33.2% - 11s 0 0 2.67066 0 3037 4.00000 2.67066 33.2% - 12s 0 0 2.67066 0 3037 4.00000 2.67066 33.2% - 12s 0 0 2.67066 0 3037 4.00000 2.67066 33.2% - 13s 0 2 2.80000 0 3037 4.00000 2.80000 30.0% - 14s 19 1 cutoff 1 4.00000 3.00000 25.0% 398 15s Cutting planes: Clique: 85 Zero half: 9 Explored 21 nodes (37575 simplex iterations) in 15.91 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%