Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:56:43 2012 Optimize a model with 701 rows, 168 columns and 1402 nonzeros Presolve removed 146 rows and 0 columns Presolve time: 0.00s Presolved: 555 rows, 168 columns, 1207 nonzeros Variable types: 0 continuous, 168 integer (168 binary) Found heuristic solution: objective 48.0000000 Root relaxation: objective 6.700000e+01, 332 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 67.00000 0 132 48.00000 67.00000 39.6% - 0s 0 0 66.05000 0 163 48.00000 66.05000 37.6% - 0s H 0 0 50.0000000 66.05000 32.1% - 0s 0 0 65.58278 0 167 50.00000 65.58278 31.2% - 0s H 0 0 51.0000000 65.58278 28.6% - 0s 0 0 64.87984 0 165 51.00000 64.87984 27.2% - 0s H 0 0 53.0000000 64.87984 22.4% - 0s 0 0 64.43351 0 167 53.00000 64.43351 21.6% - 0s 0 0 64.15919 0 166 53.00000 64.15919 21.1% - 0s 0 0 63.91222 0 167 53.00000 63.91222 20.6% - 0s 0 0 63.70933 0 168 53.00000 63.70933 20.2% - 0s 0 0 63.65042 0 167 53.00000 63.65042 20.1% - 0s 0 0 63.48475 0 167 53.00000 63.48475 19.8% - 0s 0 0 63.39982 0 167 53.00000 63.39982 19.6% - 0s 0 0 63.35777 0 167 53.00000 63.35777 19.5% - 0s 0 0 63.31793 0 168 53.00000 63.31793 19.5% - 0s H 0 0 54.0000000 63.31793 17.3% - 0s 0 2 63.31481 0 168 54.00000 63.31481 17.2% - 0s * 33 22 10 55.0000000 62.95921 14.5% 65.6 0s * 371 121 12 56.0000000 61.29717 9.46% 49.7 0s 612 174 60.27434 8 167 56.00000 60.65060 8.30% 47.3 5s 1709 307 58.20209 25 128 56.00000 59.23148 5.77% 49.7 10s Cutting planes: Gomory: 4 Zero half: 180 Explored 2949 nodes (127446 simplex iterations) in 13.07 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.600000000000e+01, best bound 5.600000000000e+01, gap 0.0%