Gurobi 5.0.1 (linux64) logging started Mon Feb 4 16:02:34 2013 Optimize a model with 135 rows, 100 columns and 360 nonzeros Presolve removed 45 rows and 45 columns Presolve time: 0.00s Presolved: 90 rows, 55 columns, 270 nonzeros Variable types: 10 continuous, 45 integer (45 binary) Found heuristic solution: objective 1559.0000000 Root relaxation: objective 4.300000e+02, 32 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 430.00000 0 21 1559.00000 430.00000 72.4% - 0s H 0 0 1558.0000000 430.00000 72.4% - 0s 0 0 576.28495 0 19 1558.00000 576.28495 63.0% - 0s 0 0 576.56950 0 23 1558.00000 576.56950 63.0% - 0s 0 0 576.56950 0 23 1558.00000 576.56950 63.0% - 0s H 0 0 1358.0000000 576.56950 57.5% - 0s 0 2 577.75578 0 23 1358.00000 577.75578 57.5% - 0s H 27 27 1348.0000000 577.75578 57.1% 4.8 0s * 102 70 21 1265.0000000 611.91337 51.6% 4.2 0s * 165 113 22 1260.0000000 612.51996 51.4% 4.0 0s H 168 88 1177.0000000 649.70607 44.8% 4.2 0s * 324 175 16 1172.0000000 716.00000 38.9% 4.4 0s * 328 172 15 1167.0000000 716.00000 38.6% 4.4 0s H 605 268 1163.0000000 751.37931 35.4% 4.0 0s * 792 302 24 1154.0000000 751.37931 34.9% 5.5 0s H 1056 295 1140.0000000 751.37931 34.1% 5.7 0s H 1140 259 1102.0000000 751.37931 31.8% 5.8 0s * 1160 248 24 1100.0000000 751.37931 31.7% 5.7 0s H 1559 256 1086.0000000 753.76924 30.6% 5.4 0s Cutting planes: Gomory: 31 Implied bound: 5 MIR: 44 Explored 6700 nodes (26284 simplex iterations) in 0.63 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.086000000000e+03, best bound 1.086000000000e+03, gap 0.0%