Gurobi 5.0.1 (linux64) logging started Tue Nov 20 06:08:46 2012 Optimize a model with 950 rows, 130 columns and 1900 nonzeros Presolve removed 411 rows and 0 columns Presolve time: 0.01s Presolved: 539 rows, 130 columns, 1468 nonzeros Variable types: 0 continuous, 130 integer (130 binary) Found heuristic solution: objective 26.0000000 Root relaxation: objective 4.136181e+01, 338 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 41.36181 0 130 26.00000 41.36181 59.1% - 0s H 0 0 27.0000000 41.36181 53.2% - 0s 0 0 41.08492 0 130 27.00000 41.08492 52.2% - 0s 0 0 41.00558 0 130 27.00000 41.00558 51.9% - 0s 0 0 40.94396 0 130 27.00000 40.94396 51.6% - 0s 0 0 40.89033 0 129 27.00000 40.89033 51.4% - 0s 0 0 40.83842 0 130 27.00000 40.83842 51.3% - 0s H 0 0 29.0000000 40.83842 40.8% - 0s 0 0 40.78507 0 129 29.00000 40.78507 40.6% - 0s 0 0 40.62594 0 128 29.00000 40.62594 40.1% - 0s 0 0 40.50513 0 130 29.00000 40.50513 39.7% - 0s 0 0 40.46884 0 130 29.00000 40.46884 39.5% - 0s 0 0 40.45108 0 129 29.00000 40.45108 39.5% - 0s 0 0 40.37392 0 129 29.00000 40.37392 39.2% - 0s 0 0 40.31467 0 129 29.00000 40.31467 39.0% - 0s 0 0 40.31104 0 129 29.00000 40.31104 39.0% - 0s 0 0 40.31104 0 129 29.00000 40.31104 39.0% - 0s H 0 0 30.0000000 40.31104 34.4% - 0s 0 2 40.31073 0 129 30.00000 40.31073 34.4% - 0s H 142 59 31.0000000 38.59828 24.5% 48.7 0s 2915 809 32.57143 25 81 31.00000 35.34568 14.0% 34.5 5s 8479 369 cutoff 28 31.00000 32.91429 6.18% 27.5 10s Explored 9127 nodes (243810 simplex iterations) in 10.30 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.100000000000e+01, best bound 3.100000000000e+01, gap 0.0%