Gurobi 5.0.1 (linux64) logging started Sun Nov 18 04:31:23 2012 Optimize a model with 423 rows, 304 columns and 1359 nonzeros Presolve time: 0.00s Presolved: 423 rows, 304 columns, 1359 nonzeros Variable types: 0 continuous, 304 integer (304 binary) Found heuristic solution: objective 91.0000000 Root relaxation: objective 0.000000e+00, 124 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 92 91.00000 0.00000 100% - 0s H 0 0 84.0000000 0.00000 100% - 0s H 0 0 83.0000000 0.00000 100% - 0s 0 0 0.60811 0 93 83.00000 0.60811 99.3% - 0s H 0 0 81.0000000 0.60811 99.2% - 0s 0 0 0.62162 0 94 81.00000 0.62162 99.2% - 0s H 0 0 77.0000000 0.62162 99.2% - 0s 0 0 0.63224 0 96 77.00000 0.63224 99.2% - 0s H 0 0 74.0000000 0.63224 99.1% - 0s 0 0 0.66776 0 97 74.00000 0.66776 99.1% - 0s 0 0 0.73833 0 97 74.00000 0.73833 99.0% - 0s 0 0 0.73900 0 97 74.00000 0.73900 99.0% - 0s 0 2 0.80036 0 97 74.00000 0.80036 98.9% - 0s H 32 32 63.0000000 4.20439 93.3% 41.2 0s * 43 42 26 45.0000000 4.20439 90.7% 36.5 0s * 84 68 24 44.0000000 4.26255 90.3% 32.1 0s H 163 132 43.0000000 8.66728 79.8% 31.5 0s * 164 127 17 42.0000000 8.66728 79.4% 31.4 0s * 217 160 25 41.0000000 10.61712 74.1% 30.5 0s * 919 386 39 40.0000000 15.64286 60.9% 28.7 1s * 2092 440 31 39.0000000 24.15517 38.1% 25.9 2s 4410 530 37.35000 23 148 39.00000 28.08000 28.0% 23.8 5s Explored 8845 nodes (193290 simplex iterations) in 8.53 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.900000000000e+01, best bound 3.900000000000e+01, gap 0.0%