Gurobi 5.0.1 (linux64) logging started Sun Nov 18 08:18:13 2012 Optimize a model with 617 rows, 544 columns and 2084 nonzeros Presolve removed 0 rows and 15 columns Presolve time: 0.00s Presolved: 617 rows, 529 columns, 2069 nonzeros Variable types: 0 continuous, 529 integer (528 binary) Found heuristic solution: objective 108.0000000 Root relaxation: objective 0.000000e+00, 308 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 210 108.00000 0.00000 100% - 0s H 0 0 86.0000000 0.00000 100% - 0s H 0 0 80.0000000 0.00000 100% - 0s 0 0 0.41548 0 211 80.00000 0.41548 99.5% - 0s H 0 0 72.0000000 0.41548 99.4% - 0s 0 0 0.74797 0 212 72.00000 0.74797 99.0% - 0s H 0 0 53.0000000 0.74797 98.6% - 0s 0 0 1.00000 0 213 53.00000 1.00000 98.1% - 0s 0 0 1.00000 0 214 53.00000 1.00000 98.1% - 0s 0 0 1.00000 0 210 53.00000 1.00000 98.1% - 0s 0 2 1.00000 0 210 53.00000 1.00000 98.1% - 0s H 54 43 32.0000000 2.68571 91.6% 39.6 0s * 127 88 24 31.0000000 6.81308 78.0% 35.6 0s * 184 117 19 30.0000000 7.00000 76.7% 37.1 0s H 216 139 29.0000000 9.12360 68.5% 39.7 0s * 295 170 32 28.0000000 10.22378 63.5% 37.8 0s * 549 205 15 27.0000000 12.74194 52.8% 36.4 1s 2289 153 22.67582 19 227 27.00000 20.57447 23.8% 35.9 5s Cutting planes: Gomory: 1 Explored 2883 nodes (101589 simplex iterations) in 6.43 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.700000000000e+01, best bound 2.700000000000e+01, gap 0.0%