Gurobi 5.0.1 (linux64) logging started Fri Nov 16 06:51:13 2012 Optimize a model with 9840 rows, 3660 columns and 32940 nonzeros Presolve time: 0.08s Presolved: 9840 rows, 3660 columns, 33205 nonzeros Variable types: 0 continuous, 3660 integer (3660 binary) Found heuristic solution: objective 37.0000000 Root relaxation: objective 2.000000e+00, 4221 iterations, 0.30 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 120 37.00000 2.00000 94.6% - 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% - 2s 0 0 2.00000 0 120 5.00000 2.00000 60.0% - 6s 0 0 2.00000 0 120 5.00000 2.00000 60.0% - 10s 0 0 2.00000 0 120 5.00000 2.00000 60.0% - 14s H 0 0 4.0000000 2.00000 50.0% - 14s 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 2 2.00000 0 120 4.00000 2.00000 50.0% - 37s 1 3 2.50000 1 183 4.00000 2.00000 50.0% 22210 42s 2 4 2.50000 1 292 4.00000 2.50000 37.5% 24117 50s 36 12 2.66667 3 147 4.00000 2.50000 37.5% 1903 55s 108 27 3.00000 9 104 4.00000 2.50000 37.5% 845 61s 151 29 2.57143 5 207 4.00000 2.57143 35.7% 723 65s 250 18 3.00000 10 108 4.00000 3.00000 25.0% 487 75s Cutting planes: Clique: 97 Explored 357 nodes (208963 simplex iterations) in 76.47 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%