Build (method = -2) #dp: 5134 Step-3' Graph: 122 vertices and 858 arcs (0.02s) Step-4' Graph: 74 vertices and 762 arcs (0.02s) #V4/#V3 = 0.61 #A4/#A3 = 0.89 Ready! (0.02s) Optimize a model with 142 rows, 763 columns and 2145 nonzeros Presolve removed 31 rows and 37 columns Presolve time: 0.02s Presolved: 111 rows, 726 columns, 2069 nonzeros Variable types: 0 continuous, 726 integer (450 binary) Found heuristic solution: objective 69.0000000 Found heuristic solution: objective 60.0000000 Optimize a model with 111 rows, 726 columns and 2069 nonzeros Presolved: 111 rows, 726 columns, 2069 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.560e+03 Factor NZ : 3.236e+03 Factor Ops : 1.197e+05 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 2.69935789e+03 -1.08428204e+04 3.37e+03 2.19e-01 6.04e+01 0s 1 7.65079449e+02 -2.35970495e+03 5.75e+02 8.88e-16 1.01e+01 0s 2 1.46727917e+02 -6.41798357e+02 3.75e+01 1.11e-15 1.00e+00 0s 3 8.63537462e+01 -1.31754698e+02 3.60e+00 8.88e-16 1.80e-01 0s 4 5.89706320e+01 -2.44854459e+01 2.45e-01 6.66e-16 5.81e-02 0s 5 5.01128930e+01 1.68321778e+01 1.10e-01 6.66e-16 2.29e-02 0s 6 4.66053081e+01 2.85561945e+01 6.88e-02 4.44e-16 1.24e-02 0s 7 4.22582840e+01 3.48432900e+01 2.30e-02 6.66e-16 5.08e-03 0s 8 4.04503486e+01 3.74919165e+01 4.04e-03 6.66e-16 2.02e-03 0s 9 4.00083965e+01 3.88536230e+01 1.03e-03 4.44e-16 7.88e-04 0s 10 3.98551521e+01 3.94530796e+01 3.38e-04 4.44e-16 2.74e-04 0s 11 3.97521175e+01 3.96659937e+01 3.22e-05 4.44e-16 5.88e-05 0s 12 3.97308793e+01 3.96898945e+01 1.17e-05 4.44e-16 2.80e-05 0s 13 3.97219405e+01 3.96996794e+01 4.68e-06 4.44e-16 1.52e-05 0s 14 3.97182098e+01 3.97032671e+01 2.63e-06 3.33e-16 1.02e-05 0s 15 3.97194512e+01 3.97095743e+01 1.29e-06 4.44e-16 6.74e-06 0s 16 3.97180112e+01 3.97155319e+01 6.55e-07 4.44e-16 1.69e-06 0s 17 3.97166781e+01 3.97165187e+01 8.43e-09 6.66e-16 1.09e-07 0s 18 3.97166667e+01 3.97166665e+01 8.14e-13 4.44e-16 1.09e-10 0s 19 3.97166667e+01 3.97166667e+01 1.08e-12 6.66e-16 1.09e-13 0s Barrier solved model in 19 iterations and 0.01 seconds Optimal objective 3.97166667e+01 Root relaxation: objective 3.971667e+01, 344 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 39.71667 0 33 60.00000 39.71667 33.8% - 0s H 0 0 53.0000000 39.71667 25.1% - 0s H 0 0 41.0000000 39.71667 3.13% - 0s 0 0 39.73333 0 62 41.00000 39.73333 3.09% - 0s H 0 0 40.0000000 39.73333 0.67% - 0s Cutting planes: Gomory: 3 MIR: 1 Explored 0 nodes (775 simplex iterations) in 0.11 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: 0.11 seconds Total run time: 0.14 seconds Objective: 40 Solution: 2 x [17, 68] 1 x [19, 67] 1 x [3, 16, 67] 1 x [9, 9, 66] 1 x [7, 12, 65] 1 x [9, 11, 64] 1 x [22, 63] 1 x [23, 62] 1 x [24, 61] 1 x [25, 60] 1 x [2, 26, 59] 1 x [14, 16, 59] 1 x [4, 59] 1 x [28, 58] 1 x [29, 57] 1 x [30, 56] 2 x [31, 55] 1 x [6, 23, 55] 1 x [32, 54] 1 x [35, 53] 1 x [36, 52] 1 x [10, 27, 52] 1 x [18, 20, 52] 1 x [39, 51] 1 x [13, 27, 51] 1 x [42, 50] 1 x [1, 41, 49] 1 x [4, 38, 49] 1 x [8, 33, 49] 1 x [15, 28, 49] 1 x [20, 21, 49] 1 x [5, 37, 48] 1 x [43, 47] 1 x [2, 42, 47] 1 x [44, 46] 1 x [17, 31, 45] 1 x [13, 34, 44] 1 x [16, 37, 40]