Gurobi 5.0.1 (linux64) logging started Tue Nov 20 06:08:07 2012 Optimize a model with 866 rows, 130 columns and 1732 nonzeros Presolve removed 337 rows and 0 columns Presolve time: 0.01s Presolved: 529 rows, 130 columns, 1369 nonzeros Variable types: 0 continuous, 130 integer (130 binary) Found heuristic solution: objective 29.0000000 Root relaxation: objective 4.307895e+01, 323 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 43.07895 0 127 29.00000 43.07895 48.5% - 0s 0 0 42.57511 0 128 29.00000 42.57511 46.8% - 0s 0 0 42.33991 0 127 29.00000 42.33991 46.0% - 0s 0 0 42.25947 0 128 29.00000 42.25947 45.7% - 0s 0 0 42.02342 0 129 29.00000 42.02342 44.9% - 0s 0 0 41.91741 0 129 29.00000 41.91741 44.5% - 0s 0 0 41.71978 0 128 29.00000 41.71978 43.9% - 0s 0 0 41.69180 0 128 29.00000 41.69180 43.8% - 0s H 0 0 30.0000000 41.69180 39.0% - 0s 0 0 41.61350 0 128 30.00000 41.61350 38.7% - 0s 0 0 41.58145 0 129 30.00000 41.58145 38.6% - 0s 0 0 41.50383 0 129 30.00000 41.50383 38.3% - 0s 0 0 41.48677 0 130 30.00000 41.48677 38.3% - 0s 0 0 41.48475 0 130 30.00000 41.48475 38.3% - 0s 0 0 41.42588 0 128 30.00000 41.42588 38.1% - 0s H 0 0 31.0000000 41.42588 33.6% - 0s 0 0 41.41853 0 129 31.00000 41.41853 33.6% - 0s 0 0 41.41853 0 129 31.00000 41.41853 33.6% - 0s 0 2 41.41667 0 129 31.00000 41.41667 33.6% - 0s H 43 31 32.0000000 40.95939 28.0% 43.1 0s 613 278 35.44595 8 128 32.00000 38.27632 19.6% 31.5 5s 683 327 33.46667 37 79 32.00000 38.27632 19.6% 38.4 10s H 929 350 33.0000000 38.27632 16.0% 38.7 10s 3997 551 cutoff 25 33.00000 35.59322 7.86% 27.9 15s * 4127 259 22 34.0000000 35.50000 4.41% 27.7 15s Cutting planes: Gomory: 1 Clique: 5 Zero half: 76 Explored 4432 nodes (118423 simplex iterations) in 15.25 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.400000000000e+01, best bound 3.400000000000e+01, gap 0.0%