Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:00:01 2012 Optimize a model with 431 rows, 282 columns and 1357 nonzeros Presolve time: 0.00s Presolved: 431 rows, 282 columns, 1357 nonzeros Variable types: 0 continuous, 282 integer (282 binary) Found heuristic solution: objective 92.0000000 Root relaxation: objective 0.000000e+00, 115 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 67 92.00000 0.00000 100% - 0s H 0 0 90.0000000 0.00000 100% - 0s H 0 0 89.0000000 0.00000 100% - 0s 0 0 0.73664 0 69 89.00000 0.73664 99.2% - 0s 0 0 0.74482 0 69 89.00000 0.74482 99.2% - 0s 0 0 0.76938 0 69 89.00000 0.76938 99.1% - 0s 0 0 0.78575 0 69 89.00000 0.78575 99.1% - 0s 0 0 0.78575 0 69 89.00000 0.78575 99.1% - 0s 0 0 0.78575 0 69 89.00000 0.78575 99.1% - 0s H 0 0 82.0000000 0.78575 99.0% - 0s 0 2 0.78852 0 69 82.00000 0.78852 99.0% - 0s H 40 40 62.0000000 4.46278 92.8% 34.9 0s * 48 37 23 61.0000000 4.46278 92.7% 30.8 0s * 83 60 22 60.0000000 4.51210 92.5% 31.2 0s * 453 267 27 59.0000000 12.64000 78.6% 30.4 0s H 484 274 57.0000000 15.00000 73.7% 30.4 0s * 694 352 36 56.0000000 17.81659 68.2% 31.0 1s * 1313 436 31 55.0000000 24.61224 55.3% 30.9 1s 4055 1085 46.58182 21 140 55.00000 33.68421 38.8% 27.6 5s * 4922 1176 29 53.0000000 34.52000 34.9% 27.3 5s * 7750 1380 28 52.0000000 37.58333 27.7% 25.9 8s 9652 1419 42.58491 20 131 52.00000 39.41176 24.2% 25.2 10s 16337 1060 45.36364 21 140 52.00000 42.84906 17.6% 23.8 15s Explored 21573 nodes (495141 simplex iterations) in 18.55 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.200000000000e+01, best bound 5.200000000000e+01, gap 0.0%