Build (method = -2) #dp: 3536 Step-3' Graph: 155 vertices and 456 arcs (0.03s) Step-4' Graph: 19 vertices and 184 arcs (0.03s) #V4/#V3 = 0.12 #A4/#A3 = 0.40 Ready! (0.03s) Optimize a model with 66 rows, 185 columns and 523 nonzeros Presolve removed 3 rows and 3 columns Presolve time: 0.00s Presolved: 63 rows, 182 columns, 516 nonzeros Variable types: 0 continuous, 182 integer (30 binary) Found heuristic solution: objective 110.0000000 Found heuristic solution: objective 109.0000000 Optimize a model with 63 rows, 182 columns and 516 nonzeros Presolved: 63 rows, 182 columns, 516 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.970e+02 Factor NZ : 6.660e+02 Factor Ops : 1.206e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 3.19711196e+02 -3.38578087e+02 7.40e+01 3.91e-02 4.11e+00 0s 1 7.48955627e+01 -1.40606806e+02 6.39e-13 3.33e-16 5.56e-01 0s 2 4.59268617e+01 2.64383338e+01 5.51e-14 4.44e-16 4.89e-02 0s 3 4.00568992e+01 3.96831737e+01 1.39e-13 3.26e-16 9.34e-04 0s 4 4.00000578e+01 3.99996841e+01 1.00e-13 3.33e-16 9.34e-07 0s 5 4.00000000e+01 4.00000000e+01 1.49e-13 1.47e-16 9.34e-13 0s Barrier solved model in 5 iterations and 0.00 seconds Optimal objective 4.00000000e+01 Root relaxation: objective 4.000000e+01, 142 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 40.0000000 40.00000 0.0% - 0s Explored 0 nodes (142 simplex iterations) in 0.01 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 4.000000000000e+01, best bound 4.000000000000e+01, gap 0.0% Preprocessing time: 0.03 seconds Gurobi run time: 0.01 seconds Total run time: 0.04 seconds Objective: 40 Solution: 1 x [21, 39, 47] 2 x [7, 44, 46] 3 x [4, 40, 45] 3 x [10, 36, 44] 1 x [18, 35, 43] 4 x [31, 38, 42] 1 x [15, 18, 42] 1 x [21, 41, 41] 4 x [9, 27, 38] 2 x [12, 25, 37] 1 x [25, 34, 34] 3 x [3, 30, 33] 1 x [24, 24, 33] 1 x [11, 18, 32] 2 x [14, 22, 29] 3 x [2, 26, 28] 1 x [8, 16, 23] 2 x [17, 20, 22] 1 x [8, 16, 19] 1 x [1, 6, 13] 1 x [1, 6, 7] 1 x [1, 4, 5]