Build (method = -2) #dp: 278 Step-3' Graph: 27 vertices and 143 arcs (0.00s) Step-4' Graph: 18 vertices and 125 arcs (0.00s) #V4/#V3 = 0.67 #A4/#A3 = 0.87 Ready! (0.00s) Optimize a model with 55 rows, 126 columns and 346 nonzeros Presolve removed 34 rows and 39 columns Presolve time: 0.00s Presolved: 21 rows, 87 columns, 226 nonzeros Variable types: 0 continuous, 87 integer (64 binary) Found heuristic solution: objective 42.0000000 Found heuristic solution: objective 41.0000000 Optimize a model with 21 rows, 87 columns and 226 nonzeros Presolved: 21 rows, 87 columns, 226 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.000e+02 Factor NZ : 2.310e+02 Factor Ops : 3.311e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 9.25796351e+01 -7.24030816e+01 9.77e+01 2.30e-01 2.76e+00 0s 1 5.02494498e+01 -3.40467247e+00 8.06e+00 3.33e-16 4.25e-01 0s 2 3.97585072e+01 2.66826807e+01 3.88e-01 9.65e-03 7.83e-02 0s 3 3.77667774e+01 3.66053203e+01 2.65e-02 2.22e-16 6.75e-03 0s 4 3.75016583e+01 3.74973429e+01 1.11e-14 2.22e-16 2.47e-05 0s 5 3.75000000e+01 3.75000000e+01 1.88e-15 2.22e-16 2.82e-11 0s Barrier solved model in 5 iterations and 0.00 seconds Optimal objective 3.75000000e+01 Root relaxation: objective 3.750000e+01, 40 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 37.50000 0 4 41.00000 37.50000 8.54% - 0s H 0 0 38.0000000 37.50000 1.32% - 0s Explored 0 nodes (50 simplex iterations) in 0.00 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 3.800000000000e+01, best bound 3.800000000000e+01, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.01 seconds Objective: 38 Solution: 3 x [37] 1 x [36] 1 x [35] 1 x [34] 2 x [33] 1 x [32] 1 x [31] 1 x [30] 1 x [29] 2 x [28] 1 x [27] 1 x [26] 2 x [25] 1 x [1, 24] 2 x [23] 2 x [22] 1 x [4, 21] 1 x [5, 20] 1 x [19] 1 x [3, 19] 1 x [2, 18] 1 x [6, 17] 2 x [16] 1 x [15] 1 x [8, 15] 1 x [11, 14] 1 x [10, 13] 1 x [9, 12] 1 x [7, 10] 1 x [10, 10]