Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:53:03 2012 Optimize a model with 705 rows, 118 columns and 1410 nonzeros Presolve removed 267 rows and 0 columns Presolve time: 0.00s Presolved: 438 rows, 118 columns, 1113 nonzeros Variable types: 0 continuous, 118 integer (118 binary) Found heuristic solution: objective 26.0000000 Root relaxation: objective 4.011765e+01, 332 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 40.11765 0 117 26.00000 40.11765 54.3% - 0s H 0 0 28.0000000 40.11765 43.3% - 0s 0 0 39.32862 0 118 28.00000 39.32862 40.5% - 0s 0 0 38.94612 0 117 28.00000 38.94612 39.1% - 0s 0 0 38.80972 0 116 28.00000 38.80972 38.6% - 0s 0 0 38.70437 0 117 28.00000 38.70437 38.2% - 0s 0 0 38.60772 0 115 28.00000 38.60772 37.9% - 0s 0 0 38.57031 0 115 28.00000 38.57031 37.8% - 0s H 0 0 29.0000000 38.57031 33.0% - 0s 0 0 38.50528 0 116 29.00000 38.50528 32.8% - 0s 0 0 38.40894 0 116 29.00000 38.40894 32.4% - 0s H 0 0 30.0000000 38.40894 28.0% - 0s 0 0 38.40489 0 117 30.00000 38.40489 28.0% - 0s 0 0 38.40489 0 117 30.00000 38.40489 28.0% - 0s 0 2 38.40460 0 117 30.00000 38.40460 28.0% - 0s H 54 26 31.0000000 37.82231 22.0% 31.0 0s * 65 25 11 32.0000000 37.82231 18.2% 29.6 0s Cutting planes: Clique: 3 Zero half: 57 Explored 860 nodes (23639 simplex iterations) in 0.83 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%