Build (method = -2) #dp: 8735 Step-3' Graph: 328 vertices and 976 arcs (0.07s) Step-4' Graph: 107 vertices and 534 arcs (0.07s) #V4/#V3 = 0.33 #A4/#A3 = 0.55 Ready! (0.07s) Optimize a model with 152 rows, 535 columns and 1396 nonzeros Presolve removed 31 rows and 61 columns Presolve time: 0.01s Presolved: 121 rows, 474 columns, 1275 nonzeros Variable types: 0 continuous, 474 integer (45 binary) Found heuristic solution: objective 100.0000000 Optimize a model with 121 rows, 474 columns and 1275 nonzeros Presolved: 121 rows, 474 columns, 1275 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 5.890e+02 Factor NZ : 1.070e+03 Factor Ops : 1.119e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 7.16432012e+02 -1.35018880e+03 7.82e+02 1.13e-01 7.71e+00 0s 1 1.73699555e+02 -5.82837992e+02 4.81e+01 3.33e-16 1.07e+00 0s 2 7.78100331e+01 -1.16281431e+02 3.00e+00 2.22e-16 2.05e-01 0s 3 2.99613708e+01 -1.14891134e+01 1.41e-01 2.78e-16 4.23e-02 0s 4 2.45489678e+01 2.15191115e+01 6.97e-03 2.22e-16 3.08e-03 0s 5 2.40037554e+01 2.39920036e+01 4.08e-07 2.22e-16 1.19e-05 0s 6 2.40000000e+01 2.40000000e+01 1.14e-12 1.29e-16 3.68e-11 0s Barrier solved model in 6 iterations and 0.00 seconds Optimal objective 2.40000000e+01 Root relaxation: objective 2.400000e+01, 318 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 24.00000 0 5 100.00000 24.00000 76.0% - 0s H 0 0 25.0000000 24.00000 4.00% - 0s H 0 0 24.0000000 24.00000 0.0% - 0s Explored 0 nodes (400 simplex iterations) in 0.03 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 2.400000000000e+01, best bound 2.400000000000e+01, gap 0.0% Preprocessing time: 0.09 seconds Gurobi run time: 0.03 seconds Total run time: 0.11 seconds Objective: 24 Solution: 1 x [23, 23, 30, 39, 45] 2 x [17, 26, 28, 33, 45] 1 x [8, 14, 14, 19, 45] 3 x [7, 10, 34, 43, 44] 1 x [15, 15, 35, 42, 43] 2 x [2, 11, 29, 40, 41] 1 x [1, 5, 27, 40, 41] 1 x [11, 22, 36, 37, 40] 3 x [19, 21, 25, 33, 38] 1 x [1, 8, 27, 28, 35] 2 x [6, 7, 9, 32, 34] 1 x [9, 14, 30, 30, 31] 1 x [3, 8, 13, 16, 29] 1 x [8, 12, 16, 19, 26] 3 x [4, 18, 20, 22, 24]