Gurobi 5.0.1 (linux64) logging started Tue Nov 20 13:11:31 2012 Optimize a model with 770 rows, 174 columns and 1540 nonzeros Presolve removed 177 rows and 0 columns Presolve time: 0.00s Presolved: 593 rows, 174 columns, 1309 nonzeros Variable types: 0 continuous, 174 integer (174 binary) Found heuristic solution: objective 52.0000000 Root relaxation: objective 7.075000e+01, 310 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 70.75000 0 139 52.00000 70.75000 36.1% - 0s 0 0 69.28571 0 167 52.00000 69.28571 33.2% - 0s 0 0 68.58696 0 169 52.00000 68.58696 31.9% - 0s 0 0 68.19725 0 172 52.00000 68.19725 31.1% - 0s 0 0 67.22652 0 173 52.00000 67.22652 29.3% - 0s 0 0 66.77069 0 170 52.00000 66.77069 28.4% - 0s 0 0 66.30685 0 171 52.00000 66.30685 27.5% - 0s 0 0 66.13670 0 173 52.00000 66.13670 27.2% - 0s 0 0 66.01710 0 173 52.00000 66.01710 27.0% - 0s H 0 0 53.0000000 66.01710 24.6% - 0s H 0 0 54.0000000 66.01710 22.3% - 0s 0 0 65.83838 0 173 54.00000 65.83838 21.9% - 0s 0 0 65.77648 0 172 54.00000 65.77648 21.8% - 0s 0 0 65.64604 0 170 54.00000 65.64604 21.6% - 0s 0 0 65.56387 0 171 54.00000 65.56387 21.4% - 0s 0 0 65.42810 0 173 54.00000 65.42810 21.2% - 0s 0 0 65.37169 0 173 54.00000 65.37169 21.1% - 0s 0 0 65.37169 0 173 54.00000 65.37169 21.1% - 0s 0 2 65.37133 0 172 54.00000 65.37133 21.1% - 0s * 71 37 11 55.0000000 64.60763 17.5% 50.9 0s * 74 32 10 56.0000000 64.60763 15.4% 49.0 0s H 304 108 57.0000000 63.57597 11.5% 50.1 0s 629 238 61.48357 23 145 57.00000 62.76253 10.1% 50.1 5s 3561 949 cutoff 30 57.00000 60.61798 6.35% 34.5 10s 8166 224 cutoff 33 57.00000 58.54286 2.71% 27.9 15s Cutting planes: Gomory: 8 Zero half: 65 Explored 8517 nodes (234169 simplex iterations) in 15.16 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.700000000000e+01, best bound 5.700000000000e+01, gap 0.0%