Build (method = -2) #dp: 982 Step-3' Graph: 46 vertices and 359 arcs (0.00s) Step-4' Graph: 33 vertices and 333 arcs (0.00s) #V4/#V3 = 0.72 #A4/#A3 = 0.93 Ready! (0.00s) Optimize a model with 87 rows, 334 columns and 941 nonzeros Presolve removed 39 rows and 50 columns Presolve time: 0.01s Presolved: 48 rows, 284 columns, 791 nonzeros Variable types: 0 continuous, 284 integer (125 binary) Found heuristic solution: objective 77.0000000 Optimize a model with 48 rows, 284 columns and 791 nonzeros Presolved: 48 rows, 284 columns, 791 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 3.780e+02 Factor NZ : 8.950e+02 Factor Ops : 2.040e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 5.01649742e+02 -8.73559239e+02 1.36e+03 2.75e-01 1.13e+01 0s 1 1.94279679e+02 -2.89278183e+02 2.48e+02 4.44e-16 2.26e+00 0s 2 9.33843073e+01 -4.26945631e+01 2.07e+01 4.44e-15 3.23e-01 0s 3 7.44203859e+01 4.25383590e+01 2.44e+00 1.78e-15 6.08e-02 0s 4 6.94693288e+01 5.47150602e+01 4.20e-01 2.22e-15 2.61e-02 0s 5 6.76511689e+01 6.26589280e+01 1.86e-01 2.11e-15 8.81e-03 0s 6 6.69289667e+01 6.43679329e+01 8.20e-02 2.60e-15 4.50e-03 0s 7 6.62179492e+01 6.53524805e+01 1.60e-02 2.00e-15 1.51e-03 0s 8 6.60063421e+01 6.59691092e+01 3.89e-04 2.00e-15 6.47e-05 0s 9 6.60000042e+01 6.59999847e+01 3.99e-08 2.51e-15 3.38e-08 0s 10 6.60000000e+01 6.60000000e+01 1.85e-14 2.05e-15 3.38e-11 0s Barrier solved model in 10 iterations and 0.00 seconds Optimal objective 6.60000000e+01 Root relaxation: objective 6.600000e+01, 74 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 66.0000000 66.00000 0.0% - 0s Explored 0 nodes (74 simplex iterations) in 0.01 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 6.600000000000e+01, best bound 6.600000000000e+01, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.01 seconds Total run time: 0.03 seconds Objective: 66 Solution: 1 x [54] 2 x [53] 1 x [52] 1 x [51] 2 x [50] 2 x [49] 1 x [48] 3 x [47] 2 x [46] 2 x [45] 3 x [44] 2 x [43] 2 x [42] 2 x [41] 1 x [1, 40] 1 x [1, 39] 3 x [38] 1 x [37] 1 x [4, 37] 2 x [5, 36] 1 x [3, 35] 1 x [6, 34] 1 x [2, 34] 1 x [7, 33] 4 x [32] 1 x [10, 31] 1 x [8, 30] 2 x [13, 29] 2 x [14, 28] 1 x [12, 28] 2 x [15, 27] 1 x [13, 27] 1 x [17, 26] 1 x [13, 26] 1 x [18, 25] 1 x [17, 25] 1 x [19, 24] 1 x [18, 24] 1 x [16, 24] 1 x [21, 23] 1 x [20, 23] 1 x [21, 22] 1 x [22, 22] 1 x [10, 10, 11] 1 x [9, 11, 11]