Gurobi 5.0.1 (linux64) logging started Fri Nov 16 06:59:12 2012 Optimize a model with 12180 rows, 3660 columns and 39960 nonzeros Presolve time: 0.09s Presolved: 12180 rows, 3660 columns, 40193 nonzeros Variable types: 0 continuous, 3660 integer (3660 binary) Found heuristic solution: objective 40.0000000 Root relaxation: objective 2.000000e+00, 6896 iterations, 0.98 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 120 40.00000 2.00000 95.0% - 1s H 0 0 11.0000000 2.00000 81.8% - 1s H 0 0 5.0000000 2.00000 60.0% - 1s 0 0 2.00000 0 120 5.00000 2.00000 60.0% - 1s 0 0 2.00000 0 120 5.00000 2.00000 60.0% - 5s 0 0 2.00000 0 120 5.00000 2.00000 60.0% - 13s H 0 0 4.0000000 2.00000 50.0% - 13s 0 0 2.00000 0 120 4.00000 2.00000 50.0% - 17s 0 0 2.00000 0 120 4.00000 2.00000 50.0% - 21s 0 0 2.00000 0 120 4.00000 2.00000 50.0% - 25s 0 2 2.00000 0 120 4.00000 2.00000 50.0% - 34s 1 3 3.00000 1 786 4.00000 2.05556 48.6% 15734 37s 2 4 3.00000 1 537 4.00000 3.00000 25.0% 11062 40s 23 5 cutoff 5 4.00000 3.00000 25.0% 1709 45s 28 6 3.00000 6 158 4.00000 3.00000 25.0% 1976 50s 45 5 cutoff 7 4.00000 3.00000 25.0% 1713 55s 83 3 3.00000 4 114 4.00000 3.00000 25.0% 1151 60s 88 0 cutoff 4 4.00000 4.00000 0.0% 1323 65s Cutting planes: Clique: 124 Zero half: 7 Explored 89 nodes (169568 simplex iterations) in 65.44 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%