Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:57:45 2012 Optimize a model with 779 rows, 169 columns and 1558 nonzeros Presolve removed 185 rows and 2 columns Presolve time: 0.01s Presolved: 594 rows, 167 columns, 1312 nonzeros Variable types: 0 continuous, 167 integer (167 binary) Found heuristic solution: objective 47.0000000 Root relaxation: objective 6.625000e+01, 352 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 66.25000 0 145 47.00000 66.25000 41.0% - 0s 0 0 65.22222 0 161 47.00000 65.22222 38.8% - 0s H 0 0 49.0000000 65.22222 33.1% - 0s 0 0 64.83721 0 161 49.00000 64.83721 32.3% - 0s 0 0 64.08869 0 164 49.00000 64.08869 30.8% - 0s H 0 0 50.0000000 64.08869 28.2% - 0s 0 0 63.52794 0 164 50.00000 63.52794 27.1% - 0s 0 0 63.02665 0 160 50.00000 63.02665 26.1% - 0s 0 0 62.76048 0 165 50.00000 62.76048 25.5% - 0s 0 0 62.65410 0 165 50.00000 62.65410 25.3% - 0s 0 0 62.56503 0 165 50.00000 62.56503 25.1% - 0s H 0 0 51.0000000 62.56503 22.7% - 0s 0 0 62.50576 0 165 51.00000 62.50576 22.6% - 0s 0 0 62.47291 0 166 51.00000 62.47291 22.5% - 0s 0 0 62.47291 0 166 51.00000 62.47291 22.5% - 0s 0 2 62.47005 0 166 51.00000 62.47005 22.5% - 0s H 108 57 53.0000000 61.45292 15.9% 49.1 0s * 113 55 14 54.0000000 61.45292 13.8% 47.3 0s H 164 67 55.0000000 61.04590 11.0% 44.0 0s 614 209 59.11340 13 162 55.00000 59.69880 8.54% 40.5 5s 1203 283 58.59333 18 128 55.00000 59.63673 8.43% 48.2 10s Cutting planes: Gomory: 2 Zero half: 167 Mod-K: 2 Explored 3404 nodes (132177 simplex iterations) in 14.88 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.500000000000e+01, best bound 5.500000000000e+01, gap 0.0%