Gurobi 5.0.1 (linux64) logging started Fri Nov 16 13:29:33 2012 Optimize a model with 19490 rows, 5402 columns and 63508 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.68s Presolved: 19561 rows, 5400 columns, 68303 nonzeros Variable types: 0 continuous, 5400 integer (5400 binary) Found heuristic solution: objective 73.0000000 Root relaxation: objective 2.000000e+00, 3678 iterations, 0.16 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 146 73.00000 2.00000 97.3% - 1s H 0 0 66.0000000 2.00000 97.0% - 1s H 0 0 5.0000000 2.00000 60.0% - 1s 0 0 3.00000 0 3566 5.00000 3.00000 40.0% - 7s 0 0 3.00000 0 3379 5.00000 3.00000 40.0% - 11s 0 0 3.00000 0 2927 5.00000 3.00000 40.0% - 14s 0 0 3.00000 0 2962 5.00000 3.00000 40.0% - 15s H 0 0 4.0000000 3.00000 25.0% - 16s 0 0 3.00000 0 2678 4.00000 3.00000 25.0% - 23s 0 0 3.00000 0 2673 4.00000 3.00000 25.0% - 30s 0 2 3.00000 0 2673 4.00000 3.00000 25.0% - 45s Cutting planes: Clique: 37 Zero half: 3 Explored 1 nodes (99127 simplex iterations) in 48.22 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%