Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:54:18 2012 Optimize a model with 727 rows, 120 columns and 1454 nonzeros Presolve removed 268 rows and 0 columns Presolve time: 0.00s Presolved: 459 rows, 120 columns, 1169 nonzeros Variable types: 0 continuous, 120 integer (120 binary) Found heuristic solution: objective 28.0000000 Root relaxation: objective 4.118970e+01, 287 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 41.18970 0 117 28.00000 41.18970 47.1% - 0s 0 0 40.71256 0 117 28.00000 40.71256 45.4% - 0s H 0 0 29.0000000 40.71256 40.4% - 0s 0 0 40.09920 0 120 29.00000 40.09920 38.3% - 0s 0 0 39.81050 0 119 29.00000 39.81050 37.3% - 0s H 0 0 30.0000000 39.81050 32.7% - 0s 0 0 39.60860 0 119 30.00000 39.60860 32.0% - 0s 0 0 39.45163 0 120 30.00000 39.45163 31.5% - 0s 0 0 39.38049 0 120 30.00000 39.38049 31.3% - 0s 0 0 39.30501 0 117 30.00000 39.30501 31.0% - 0s 0 0 39.17744 0 120 30.00000 39.17744 30.6% - 0s 0 0 39.05808 0 120 30.00000 39.05808 30.2% - 0s 0 0 38.97583 0 118 30.00000 38.97583 29.9% - 0s 0 0 38.92441 0 117 30.00000 38.92441 29.7% - 0s 0 0 38.92262 0 117 30.00000 38.92262 29.7% - 0s 0 0 38.92262 0 117 30.00000 38.92262 29.7% - 0s 0 2 38.92069 0 117 30.00000 38.92069 29.7% - 0s * 106 46 11 31.0000000 37.83862 22.1% 35.4 0s H 496 162 32.0000000 36.51829 14.1% 29.3 0s 614 194 36.13675 13 119 32.00000 36.13675 12.9% 28.9 5s Cutting planes: Gomory: 4 Clique: 1 Zero half: 45 Explored 2141 nodes (61569 simplex iterations) in 8.25 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.200000000000e+01, best bound 3.200000000000e+01, gap 0.0%