Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:35:29 2012 Optimize a model with 341 rows, 248 columns and 1098 nonzeros Presolve time: 0.00s Presolved: 341 rows, 248 columns, 1098 nonzeros Variable types: 0 continuous, 248 integer (248 binary) Found heuristic solution: objective 84.0000000 Found heuristic solution: objective 78.0000000 Root relaxation: objective 0.000000e+00, 128 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 78 78.00000 0.00000 100% - 0s H 0 0 70.0000000 0.00000 100% - 0s H 0 0 67.0000000 0.00000 100% - 0s 0 0 0.60937 0 79 67.00000 0.60937 99.1% - 0s H 0 0 62.0000000 0.60937 99.0% - 0s 0 0 1.25134 0 81 62.00000 1.25134 98.0% - 0s H 0 0 57.0000000 1.25134 97.8% - 0s 0 0 1.26151 0 83 57.00000 1.26151 97.8% - 0s 0 0 1.26151 0 83 57.00000 1.26151 97.8% - 0s H 0 0 55.0000000 1.26151 97.7% - 0s H 0 0 50.0000000 1.26151 97.5% - 0s 0 2 1.31711 0 83 50.00000 1.31711 97.4% - 0s * 53 53 35 49.0000000 3.54995 92.8% 25.5 0s H 54 52 48.0000000 3.54995 92.6% 25.1 0s * 80 50 16 35.0000000 3.57893 89.8% 28.0 0s * 111 63 20 32.0000000 6.03900 81.1% 28.8 0s * 478 190 14 31.0000000 12.73134 58.9% 28.5 0s * 1083 222 26 29.0000000 15.14493 47.8% 27.8 1s * 1534 136 21 28.0000000 21.22222 24.2% 26.9 1s Explored 1891 nodes (48744 simplex iterations) in 1.82 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.800000000000e+01, best bound 2.800000000000e+01, gap 0.0%