Build (method = -2) #dp: 343 Step-3' Graph: 35 vertices and 155 arcs (0.00s) Step-4' Graph: 20 vertices and 125 arcs (0.00s) #V4/#V3 = 0.57 #A4/#A3 = 0.81 Ready! (0.00s) Optimize a model with 59 rows, 126 columns and 343 nonzeros Presolve removed 30 rows and 31 columns Presolve time: 0.00s Presolved: 29 rows, 95 columns, 248 nonzeros Variable types: 0 continuous, 95 integer (50 binary) Found heuristic solution: objective 39.0000000 Found heuristic solution: objective 37.0000000 Optimize a model with 29 rows, 95 columns and 248 nonzeros Presolved: 29 rows, 95 columns, 248 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.240e+02 Factor NZ : 3.550e+02 Factor Ops : 5.515e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.74507819e+02 -1.94264574e+02 1.64e+02 2.26e-01 6.20e+00 0s 1 7.06958480e+01 -4.21926385e+01 2.56e+01 4.44e-16 1.09e+00 0s 2 4.15376753e+01 1.86276933e+01 8.97e-01 6.66e-16 1.27e-01 0s 3 3.58064418e+01 2.73059379e+01 4.99e-02 4.44e-16 4.41e-02 0s 4 3.37870188e+01 3.25149633e+01 2.00e-15 3.47e-16 6.56e-03 0s 5 3.33993520e+01 3.30416530e+01 1.65e-14 2.22e-16 1.84e-03 0s 6 3.33349974e+01 3.33282862e+01 6.93e-15 1.85e-16 3.46e-05 0s 7 3.33333334e+01 3.33333332e+01 3.19e-14 4.44e-16 9.58e-10 0s 8 3.33333333e+01 3.33333333e+01 2.55e-14 3.33e-16 9.58e-13 0s Barrier solved model in 8 iterations and 0.00 seconds Optimal objective 3.33333333e+01 Root relaxation: objective 3.333333e+01, 34 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 33.33333 0 9 37.00000 33.33333 9.91% - 0s H 0 0 34.0000000 33.33333 1.96% - 0s Explored 0 nodes (43 simplex iterations) in 0.01 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 3.400000000000e+01, best bound 3.400000000000e+01, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.01 seconds Total run time: 0.02 seconds Objective: 34 Solution: 1 x [39] 1 x [38] 1 x [37] 1 x [36] 1 x [35] 1 x [34] 1 x [33] 1 x [32] 2 x [31] 2 x [30] 2 x [29] 1 x [28] 1 x [27] 2 x [26] 1 x [3, 25] 1 x [24] 1 x [6, 23] 1 x [1, 22] 2 x [9, 21] 1 x [8, 20] 1 x [1, 20] 1 x [10, 19] 1 x [12, 18] 1 x [11, 17] 2 x [13, 16] 1 x [14, 15] 1 x [2, 7] 1 x [3, 4, 5]