Build (method = -2) #dp: 1185 Step-3' Graph: 220 vertices and 653 arcs (0.01s) Step-4' Graph: 82 vertices and 377 arcs (0.01s) #V4/#V3 = 0.37 #A4/#A3 = 0.58 Ready! (0.01s) Optimize a model with 142 rows, 378 columns and 974 nonzeros Presolve removed 60 rows and 65 columns Presolve time: 0.00s Presolved: 82 rows, 313 columns, 825 nonzeros Variable types: 0 continuous, 313 integer (223 binary) Found heuristic solution: objective 44.0000000 Optimize a model with 82 rows, 313 columns and 825 nonzeros Presolved: 82 rows, 313 columns, 825 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 4.200e+02 Factor NZ : 1.423e+03 Factor Ops : 2.831e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.61567433e+02 -4.59738307e+02 9.23e+02 3.15e-01 6.54e+00 0s 1 8.53183233e+01 -1.86031182e+02 1.69e+02 5.55e-15 1.34e+00 0s 2 5.37028025e+01 -2.27145516e+01 2.37e+01 2.94e-15 2.20e-01 0s 3 4.47127735e+01 2.70085361e+01 2.74e+00 2.72e-15 3.58e-02 0s 4 4.35411230e+01 3.79294581e+01 4.39e-01 4.00e-15 9.59e-03 0s 5 4.29498082e+01 4.08009988e+01 2.06e-01 4.66e-15 3.69e-03 0s 6 4.24589758e+01 4.18002135e+01 4.43e-02 6.66e-15 1.10e-03 0s 7 4.23411781e+01 4.23049321e+01 2.96e-03 4.88e-15 6.12e-05 0s 8 4.23333432e+01 4.23333049e+01 7.09e-14 3.82e-15 6.12e-08 0s 9 4.23333333e+01 4.23333333e+01 6.94e-15 3.79e-15 6.12e-14 0s Barrier solved model in 9 iterations and 0.00 seconds Optimal objective 4.23333333e+01 Root relaxation: objective 4.233333e+01, 145 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 42.33333 0 5 44.00000 42.33333 3.79% - 0s H 0 0 43.0000000 42.33333 1.55% - 0s Explored 0 nodes (187 simplex iterations) in 0.01 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 4.300000000000e+01, best bound 4.300000000000e+01, gap 0.0% Preprocessing time: 0.02 seconds Gurobi run time: 0.01 seconds Total run time: 0.03 seconds Objective: 43 Solution: 1 x [55] 1 x [46] 1 x [25] 1 x [19] 1 x [34] 1 x [37] 1 x [24] 1 x [18] 1 x [33] 1 x [15] 1 x [16] 1 x [27, 40] 1 x [54] 1 x [45] 1 x [30] 1 x [32] 1 x [20] 1 x [44] 1 x [48] 1 x [17] 1 x [51] 1 x [3] 1 x [49] 1 x [1, 14] 1 x [6] 1 x [53] 1 x [8, 42] 1 x [29] 1 x [36, 43] 1 x [23, 28] 1 x [56, 57] 1 x [58] 1 x [10, 52] 1 x [22, 41] 1 x [5, 50] 1 x [4, 59] 1 x [21, 31] 1 x [2] 1 x [7, 60] 1 x [9, 38] 1 x [11, 13, 47] 1 x [26, 35, 39] 1 x [12]