Build (method = -2) #dp: 3253 Step-3' Graph: 148 vertices and 435 arcs (0.03s) Step-4' Graph: 18 vertices and 175 arcs (0.03s) #V4/#V3 = 0.12 #A4/#A3 = 0.40 Ready! (0.03s) Optimize a model with 63 rows, 176 columns and 498 nonzeros Presolve removed 3 rows and 3 columns Presolve time: 0.00s Presolved: 60 rows, 173 columns, 491 nonzeros Variable types: 0 continuous, 173 integer (33 binary) Found heuristic solution: objective 108.0000000 Found heuristic solution: objective 105.0000000 Optimize a model with 60 rows, 173 columns and 491 nonzeros Presolved: 60 rows, 173 columns, 491 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.870e+02 Factor NZ : 6.530e+02 Factor Ops : 1.200e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 3.16528939e+02 -3.34623665e+02 7.15e+01 3.75e-02 4.22e+00 0s 1 7.36730723e+01 -1.34499688e+02 9.95e-14 2.22e-16 5.67e-01 0s 2 4.56203247e+01 2.61807590e+01 2.09e-14 1.11e-16 5.16e-02 0s 3 4.00551308e+01 3.96871224e+01 2.42e-14 2.22e-16 9.71e-04 0s 4 4.00000561e+01 3.99996881e+01 4.14e-14 2.22e-16 9.71e-07 0s 5 4.00000000e+01 4.00000000e+01 5.99e-14 2.22e-16 9.71e-13 0s Barrier solved model in 5 iterations and 0.00 seconds Optimal objective 4.00000000e+01 Root relaxation: objective 4.000000e+01, 133 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 (133 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 [11, 36, 45] 3 x [23, 38, 44] 6 x [18, 31, 43] 1 x [16, 27, 43] 1 x [33, 33, 42] 4 x [1, 20, 42] 1 x [18, 41, 41] 1 x [13, 39, 40] 1 x [2, 6, 40] 3 x [3, 19, 37] 4 x [8, 12, 35] 2 x [14, 28, 34] 1 x [11, 29, 32] 1 x [9, 10, 30] 1 x [6, 19, 27] 1 x [7, 9, 26] 1 x [4, 9, 25] 2 x [2, 13, 24] 1 x [1, 6, 22] 2 x [5, 16, 21] 2 x [15, 17, 19]