Gurobi 5.0.1 (linux64) logging started Sun Nov 18 04:19:15 2012 Optimize a model with 369 rows, 273 columns and 1193 nonzeros Presolve time: 0.00s Presolved: 369 rows, 273 columns, 1193 nonzeros Variable types: 0 continuous, 273 integer (273 binary) Found heuristic solution: objective 87.0000000 Found heuristic solution: objective 80.0000000 Root relaxation: objective 0.000000e+00, 112 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 89 80.00000 0.00000 100% - 0s H 0 0 61.0000000 0.00000 100% - 0s H 0 0 52.0000000 0.00000 100% - 0s 0 0 0.71502 0 91 52.00000 0.71502 98.6% - 0s H 0 0 51.0000000 0.71502 98.6% - 0s 0 0 0.72523 0 91 51.00000 0.72523 98.6% - 0s H 0 0 48.0000000 0.72523 98.5% - 0s 0 0 0.76609 0 92 48.00000 0.76609 98.4% - 0s 0 0 0.76609 0 91 48.00000 0.76609 98.4% - 0s 0 0 0.78652 0 92 48.00000 0.78652 98.4% - 0s 0 0 0.79673 0 94 48.00000 0.79673 98.3% - 0s 0 0 0.81686 0 91 48.00000 0.81686 98.3% - 0s 0 0 0.83963 0 93 48.00000 0.83963 98.3% - 0s H 0 0 47.0000000 0.83963 98.2% - 0s 0 0 0.84756 0 94 47.00000 0.84756 98.2% - 0s 0 2 0.90460 0 94 47.00000 0.90460 98.1% - 0s * 35 35 21 38.0000000 3.14050 91.7% 32.3 0s H 54 39 34.0000000 3.28152 90.3% 31.4 0s * 1564 410 25 33.0000000 16.53061 49.9% 23.8 1s * 3909 779 21 32.0000000 21.30769 33.4% 22.0 3s 5309 815 cutoff 21 32.00000 23.00000 28.1% 21.5 5s Explored 11819 nodes (234677 simplex iterations) in 9.35 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.200000000000e+01, best bound 3.200000000000e+01, gap 0.0%