Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:58:03 2012 Optimize a model with 778 rows, 124 columns and 1556 nonzeros Presolve removed 275 rows and 0 columns Presolve time: 0.00s Presolved: 503 rows, 124 columns, 1270 nonzeros Variable types: 0 continuous, 124 integer (124 binary) Found heuristic solution: objective 28.0000000 Root relaxation: objective 4.293705e+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 42.93705 0 124 28.00000 42.93705 53.3% - 0s H 0 0 31.0000000 42.93705 38.5% - 0s 0 0 42.42116 0 119 31.00000 42.42116 36.8% - 0s 0 0 42.32028 0 121 31.00000 42.32028 36.5% - 0s H 0 0 32.0000000 42.32028 32.3% - 0s 0 0 42.15888 0 124 32.00000 42.15888 31.7% - 0s H 0 0 33.0000000 42.15888 27.8% - 0s 0 0 42.10739 0 124 33.00000 42.10739 27.6% - 0s 0 0 42.02194 0 124 33.00000 42.02194 27.3% - 0s 0 0 41.94034 0 123 33.00000 41.94034 27.1% - 0s 0 0 41.88437 0 123 33.00000 41.88437 26.9% - 0s 0 0 41.84620 0 123 33.00000 41.84620 26.8% - 0s 0 0 41.83658 0 123 33.00000 41.83658 26.8% - 0s 0 0 41.83658 0 123 33.00000 41.83658 26.8% - 0s 0 2 41.83615 0 123 33.00000 41.83615 26.8% - 0s * 54 26 13 34.0000000 41.09124 20.9% 38.6 0s H 935 169 35.0000000 38.64286 10.4% 30.7 1s Explored 2565 nodes (68251 simplex iterations) in 3.04 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%