Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:58:25 2012 Optimize a model with 736 rows, 169 columns and 1472 nonzeros Presolve removed 178 rows and 2 columns Presolve time: 0.00s Presolved: 558 rows, 167 columns, 1228 nonzeros Variable types: 0 continuous, 167 integer (167 binary) Found heuristic solution: objective 52.0000000 Root relaxation: objective 6.775000e+01, 320 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 67.75000 0 134 52.00000 67.75000 30.3% - 0s 0 0 66.05412 0 163 52.00000 66.05412 27.0% - 0s H 0 0 53.0000000 66.05412 24.6% - 0s 0 0 64.87269 0 163 53.00000 64.87269 22.4% - 0s 0 0 64.40093 0 163 53.00000 64.40093 21.5% - 0s 0 0 64.04191 0 162 53.00000 64.04191 20.8% - 0s 0 0 63.78322 0 167 53.00000 63.78322 20.3% - 0s 0 0 63.63608 0 163 53.00000 63.63608 20.1% - 0s 0 0 63.43915 0 166 53.00000 63.43915 19.7% - 0s 0 0 63.35921 0 166 53.00000 63.35921 19.5% - 0s 0 0 63.27873 0 165 53.00000 63.27873 19.4% - 0s 0 0 63.22838 0 165 53.00000 63.22838 19.3% - 0s 0 0 63.16636 0 166 53.00000 63.16636 19.2% - 0s 0 0 63.14887 0 167 53.00000 63.14887 19.1% - 0s 0 0 63.14887 0 167 53.00000 63.14887 19.1% - 0s 0 2 63.14665 0 166 53.00000 63.14665 19.1% - 0s * 19 17 12 54.0000000 63.01310 16.7% 50.2 0s * 334 147 17 55.0000000 61.53196 11.9% 45.1 0s 614 250 57.00000 13 165 55.00000 60.73742 10.4% 42.8 5s 2100 618 56.41667 29 94 55.00000 59.62308 8.41% 40.2 10s * 2397 559 33 56.0000000 59.42045 6.11% 39.0 10s Cutting planes: Gomory: 2 Zero half: 77 Explored 4415 nodes (149027 simplex iterations) in 12.89 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%