Build (method = -2) #dp: 4048 Step-3' Graph: 100 vertices and 1614 arcs (0.01s) Step-4' Graph: 98 vertices and 1610 arcs (0.01s) #V4/#V3 = 0.98 #A4/#A3 = 1.00 Ready! (0.01s) Optimize a model with 165 rows, 1611 columns and 4641 nonzeros Presolve removed 34 rows and 34 columns Presolve time: 0.03s Presolved: 131 rows, 1577 columns, 4551 nonzeros Variable types: 0 continuous, 1577 integer (791 binary) Found heuristic solution: objective 75.0000000 Found heuristic solution: objective 62.0000000 Optimize a model with 131 rows, 1577 columns and 4551 nonzeros Presolved: 131 rows, 1577 columns, 4551 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 3.545e+03 Factor NZ : 6.212e+03 Factor Ops : 3.934e+05 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 2.27852658e+03 -6.40120002e+03 4.13e+03 1.64e-01 2.53e+01 0s 1 7.17471185e+02 -2.70873667e+03 9.03e+02 7.77e-16 5.78e+00 0s 2 1.70799979e+02 -9.79108545e+02 7.10e+01 6.66e-16 6.95e-01 0s 3 8.73541519e+01 -1.33827391e+02 4.79e+00 5.00e-16 8.49e-02 0s 4 6.38891570e+01 -2.34056335e+01 1.56e+00 3.33e-16 3.07e-02 0s 5 5.04566113e+01 1.01595301e+01 6.21e-01 3.60e-16 1.36e-02 0s 6 4.80330504e+01 2.30149640e+01 4.50e-01 2.95e-16 8.40e-03 0s 7 4.51395087e+01 2.86379077e+01 2.70e-01 3.48e-16 5.46e-03 0s 8 4.37454870e+01 3.43952297e+01 1.76e-01 2.78e-16 3.07e-03 0s 9 4.16631386e+01 3.79395893e+01 4.26e-02 2.67e-16 1.20e-03 0s 10 4.11979561e+01 3.93235206e+01 2.38e-02 2.83e-16 5.99e-04 0s 11 4.09410502e+01 3.99671659e+01 1.40e-02 2.83e-16 3.10e-04 0s 12 4.07491833e+01 4.02354623e+01 6.46e-03 2.87e-16 1.63e-04 0s 13 4.06605394e+01 4.03404200e+01 3.10e-03 2.85e-16 1.01e-04 0s 14 4.06383382e+01 4.04043653e+01 2.33e-03 2.77e-16 7.40e-05 0s 15 4.06098511e+01 4.04776033e+01 1.17e-03 3.48e-16 4.18e-05 0s 16 4.05855195e+01 4.05525419e+01 2.41e-04 2.65e-16 1.04e-05 0s 17 4.05716939e+01 4.05651501e+01 2.27e-05 2.73e-16 2.06e-06 0s 18 4.05684484e+01 4.05682722e+01 4.05e-07 2.88e-16 5.56e-08 0s 19 4.05683761e+01 4.05683761e+01 4.12e-12 3.17e-16 7.25e-13 0s Barrier solved model in 19 iterations and 0.02 seconds Optimal objective 4.05683761e+01 Root relaxation: objective 4.056838e+01, 189 iterations, 0.03 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 40.56838 0 43 62.00000 40.56838 34.6% - 0s H 0 0 41.0000000 40.56838 1.05% - 0s Explored 0 nodes (679 simplex iterations) in 0.09 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 4.100000000000e+01, best bound 4.100000000000e+01, gap 0.0% Preprocessing time: 0.03 seconds Gurobi run time: 0.09 seconds Total run time: 0.12 seconds Objective: 41 Solution: 1 x [7, 67] 1 x [14, 66] 1 x [1, 18, 65] 1 x [4, 16, 65] 1 x [17, 64] 1 x [5, 17, 63] 1 x [20, 62] 1 x [61] 1 x [20, 61] 1 x [8, 15, 61] 1 x [21, 60] 1 x [23, 59] 1 x [22, 59] 1 x [24, 58] 1 x [25, 57] 1 x [26, 56] 1 x [13, 16, 55] 1 x [27, 54] 1 x [28, 53] 1 x [29, 52] 1 x [5, 26, 52] 1 x [32, 51] 1 x [33, 50] 1 x [34, 49] 1 x [35, 48] 1 x [12, 24, 47] 1 x [36, 46] 1 x [37, 45] 2 x [38, 44] 1 x [2, 38, 43] 1 x [40, 42] 1 x [9, 11, 21, 41] 1 x [41, 41] 1 x [3, 10, 31, 39] 2 x [19, 24, 38] 1 x [3, 6, 37, 37] 1 x [22, 25, 34] 1 x [17, 31, 33] 1 x [18, 30, 33]