Gurobi 5.0.1 (linux64) logging started Tue Nov 20 06:02:35 2012 Optimize a model with 790 rows, 127 columns and 1580 nonzeros Presolve removed 301 rows and 0 columns Presolve time: 0.01s Presolved: 489 rows, 127 columns, 1255 nonzeros Variable types: 0 continuous, 127 integer (127 binary) Found heuristic solution: objective 27.0000000 Root relaxation: objective 4.276958e+01, 329 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 42.76958 0 127 27.00000 42.76958 58.4% - 0s H 0 0 29.0000000 42.76958 47.5% - 0s H 0 0 31.0000000 42.76958 38.0% - 0s 0 0 42.20112 0 126 31.00000 42.20112 36.1% - 0s 0 0 42.02270 0 127 31.00000 42.02270 35.6% - 0s 0 0 41.82520 0 126 31.00000 41.82520 34.9% - 0s 0 0 41.69614 0 127 31.00000 41.69614 34.5% - 0s 0 0 41.54946 0 124 31.00000 41.54946 34.0% - 0s 0 0 41.52376 0 126 31.00000 41.52376 33.9% - 0s 0 0 41.47473 0 125 31.00000 41.47473 33.8% - 0s 0 0 41.41071 0 126 31.00000 41.41071 33.6% - 0s 0 0 41.32575 0 126 31.00000 41.32575 33.3% - 0s H 0 0 32.0000000 41.32575 29.1% - 0s 0 0 41.26471 0 126 32.00000 41.26471 29.0% - 0s 0 0 41.19805 0 127 32.00000 41.19805 28.7% - 0s 0 0 41.16942 0 127 32.00000 41.16942 28.7% - 0s 0 0 41.10483 0 126 32.00000 41.10483 28.5% - 0s 0 0 41.08639 0 126 32.00000 41.08639 28.4% - 0s 0 0 41.07160 0 126 32.00000 41.07160 28.3% - 0s 0 0 41.07160 0 126 32.00000 41.07160 28.3% - 0s 0 2 41.07064 0 126 32.00000 41.07064 28.3% - 0s H 216 85 33.0000000 39.45244 19.6% 37.6 0s 612 207 35.18293 14 125 33.00000 37.93056 14.9% 33.1 5s 1079 295 34.30769 35 87 33.00000 37.88889 14.8% 39.4 10s Cutting planes: Gomory: 4 Zero half: 56 Explored 3454 nodes (99154 simplex iterations) in 12.85 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.300000000000e+01, best bound 3.300000000000e+01, gap 0.0%