Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:22 2012 Optimize a model with 514 rows, 102 columns and 1028 nonzeros Presolve removed 174 rows and 0 columns Presolve time: 0.00s Presolved: 340 rows, 102 columns, 820 nonzeros Variable types: 0 continuous, 102 integer (102 binary) Found heuristic solution: objective 27.0000000 Root relaxation: objective 3.715663e+01, 224 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 37.15663 0 100 27.00000 37.15663 37.6% - 0s H 0 0 29.0000000 37.15663 28.1% - 0s 0 0 36.44581 0 101 29.00000 36.44581 25.7% - 0s H 0 0 30.0000000 36.44581 21.5% - 0s 0 0 36.13861 0 101 30.00000 36.13861 20.5% - 0s 0 0 35.94516 0 99 30.00000 35.94516 19.8% - 0s 0 0 35.65385 0 100 30.00000 35.65385 18.8% - 0s 0 0 35.42490 0 101 30.00000 35.42490 18.1% - 0s 0 0 35.35385 0 97 30.00000 35.35385 17.8% - 0s 0 0 35.25398 0 101 30.00000 35.25398 17.5% - 0s 0 0 35.20409 0 101 30.00000 35.20409 17.3% - 0s 0 0 35.14496 0 101 30.00000 35.14496 17.1% - 0s 0 0 35.06697 0 102 30.00000 35.06697 16.9% - 0s 0 0 35.04734 0 102 30.00000 35.04734 16.8% - 0s 0 0 35.04734 0 102 30.00000 35.04734 16.8% - 0s 0 2 35.04734 0 102 30.00000 35.04734 16.8% - 0s * 415 23 9 31.0000000 32.44118 4.65% 23.8 0s Cutting planes: Zero half: 53 Explored 439 nodes (10885 simplex iterations) in 0.40 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.100000000000e+01, best bound 3.100000000000e+01, gap 0.0%