Gurobi 5.0.1 (linux64) logging started Sun Nov 18 04:20:21 2012 Optimize a model with 467 rows, 323 columns and 1488 nonzeros Presolve removed 0 rows and 1 columns Presolve time: 0.00s Presolved: 467 rows, 322 columns, 1487 nonzeros Variable types: 0 continuous, 322 integer (321 binary) Found heuristic solution: objective 107.0000000 Root relaxation: objective 0.000000e+00, 135 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 88 107.00000 0.00000 100% - 0s H 0 0 99.0000000 0.00000 100% - 0s 0 0 0.50027 0 89 99.00000 0.50027 99.5% - 0s H 0 0 92.0000000 0.50027 99.5% - 0s 0 0 1.20510 0 91 92.00000 1.20510 98.7% - 0s H 0 0 89.0000000 1.20510 98.6% - 0s 0 0 1.60461 0 95 89.00000 1.60461 98.2% - 0s 0 0 1.60646 0 96 89.00000 1.60646 98.2% - 0s 0 2 1.60960 0 96 89.00000 1.60960 98.2% - 0s H 27 27 83.0000000 2.66129 96.8% 44.8 0s * 51 44 31 57.0000000 2.66129 95.3% 32.7 0s H 207 156 53.0000000 6.28817 88.1% 36.0 0s * 284 216 26 52.0000000 6.36728 87.8% 36.2 0s * 836 486 32 51.0000000 14.44068 71.7% 35.6 1s * 919 481 27 50.0000000 15.47368 69.1% 35.1 1s * 3600 962 29 48.0000000 29.72727 38.1% 27.4 4s 3625 967 46.47826 22 151 48.00000 29.76471 38.0% 27.4 5s 8832 1541 41.30556 21 152 48.00000 34.78947 27.5% 24.9 10s 15022 1652 cutoff 24 48.00000 37.82090 21.2% 23.5 15s 21546 1219 44.91549 21 149 48.00000 39.92308 16.8% 22.7 20s Explored 27431 nodes (605171 simplex iterations) in 23.88 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.800000000000e+01, best bound 4.800000000000e+01, gap 0.0%