Gurobi 5.0.1 (linux64) logging started Sun Nov 18 01:04:34 2012 Optimize a model with 325 rows, 219 columns and 1029 nonzeros Presolve time: 0.00s Presolved: 325 rows, 219 columns, 1029 nonzeros Variable types: 0 continuous, 219 integer (219 binary) Found heuristic solution: objective 70.0000000 Root relaxation: objective 0.000000e+00, 93 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 57 70.00000 0.00000 100% - 0s H 0 0 65.0000000 0.00000 100% - 0s H 0 0 59.0000000 0.00000 100% - 0s 0 0 0.91353 0 59 59.00000 0.91353 98.5% - 0s 0 0 0.93961 0 62 59.00000 0.93961 98.4% - 0s 0 0 0.94563 0 61 59.00000 0.94563 98.4% - 0s 0 0 1.00877 0 59 59.00000 1.00877 98.3% - 0s 0 0 1.00877 0 59 59.00000 1.00877 98.3% - 0s 0 0 1.00877 0 59 59.00000 1.00877 98.3% - 0s 0 2 1.06661 0 59 59.00000 1.06661 98.2% - 0s H 32 32 45.0000000 4.65941 89.6% 32.6 0s * 40 40 23 44.0000000 4.65941 89.4% 28.7 0s * 407 239 21 43.0000000 13.86957 67.7% 21.0 0s * 537 321 24 42.0000000 16.80000 60.0% 20.6 0s * 658 358 25 41.0000000 17.78431 56.6% 19.6 0s * 956 441 36 40.0000000 18.76923 53.1% 21.2 0s * 1060 460 24 39.0000000 18.76923 51.9% 22.1 0s H 2448 412 38.0000000 23.15789 39.1% 23.0 1s * 2719 402 22 37.0000000 24.57143 33.6% 23.2 2s * 3149 384 23 36.0000000 25.26087 29.8% 23.4 2s * 4012 287 23 35.0000000 27.50000 21.4% 23.5 3s Explored 4835 nodes (110836 simplex iterations) in 3.75 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.500000000000e+01, best bound 3.500000000000e+01, gap 0.0%