Build (method = -2) #dp: 12793 Step-3' Graph: 840 vertices and 3766 arcs (0.05s) Step-4' Graph: 505 vertices and 3096 arcs (0.05s) #V4/#V3 = 0.60 #A4/#A3 = 0.82 Ready! (0.05s) Optimize a model with 605 rows, 3097 columns and 8285 nonzeros Presolve removed 245 rows and 270 columns Presolve time: 0.05s Presolved: 360 rows, 2827 columns, 8371 nonzeros Variable types: 0 continuous, 2827 integer (2331 binary) Found heuristic solution: objective 72.0000000 Found heuristic solution: objective 71.0000000 Optimize a model with 360 rows, 2827 columns and 8371 nonzeros Presolved: 360 rows, 2827 columns, 8371 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 4.232e+03 Factor NZ : 1.314e+04 (roughly 1 MByte of memory) Factor Ops : 7.536e+05 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 -1.34147167e+03 -3.38566154e+03 2.20e+04 2.04e-01 1.30e+01 0s 1 -1.73611946e+02 -1.88899212e+03 4.39e+03 8.88e-16 2.73e+00 0s 2 9.53380177e+01 -6.36033319e+02 6.72e+02 9.44e-16 4.64e-01 0s 3 7.99382787e+01 -1.14416982e+02 7.85e+01 1.22e-15 6.88e-02 0s 4 6.77462148e+01 2.26185638e+01 1.26e+01 8.88e-16 1.26e-02 0s 5 6.27482026e+01 3.78966931e+01 3.15e+00 8.88e-16 5.41e-03 0s 6 6.03092324e+01 4.62943672e+01 1.37e+00 6.66e-16 2.85e-03 0s 7 5.78128242e+01 5.12373536e+01 4.57e-01 8.88e-16 1.27e-03 0s 8 5.65521316e+01 5.40639877e+01 1.16e-01 1.11e-15 4.68e-04 0s 9 5.60627627e+01 5.57656108e+01 5.33e-03 6.66e-16 5.39e-05 0s 10 5.60000899e+01 5.59997580e+01 3.55e-14 8.88e-16 5.87e-08 0s 11 5.60000000e+01 5.60000000e+01 1.35e-13 8.88e-16 5.92e-14 0s Barrier solved model in 11 iterations and 0.03 seconds Optimal objective 5.60000000e+01 Root relaxation: objective 5.600000e+01, 565 iterations, 0.04 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 56.0000000 56.00000 0.0% - 0s Explored 0 nodes (565 simplex iterations) in 0.11 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 5.600000000000e+01, best bound 5.600000000000e+01, gap 0.0% Preprocessing time: 0.07 seconds Gurobi run time: 0.11 seconds Total run time: 0.18 seconds Objective: 56 Solution: 1 x [99] 1 x [88] 1 x [83] 1 x [89] 1 x [93] 1 x [94] 1 x [85] 1 x [77] 1 x [14, 76] 1 x [65] 1 x [15, 87] 1 x [95] 1 x [63] 1 x [92] 1 x [11, 60] 1 x [100] 1 x [27, 56] 1 x [12, 81] 1 x [20, 71] 1 x [13, 86] 1 x [96] 1 x [44, 50] 1 x [48, 49] 1 x [43, 54] 1 x [97] 1 x [7, 90] 1 x [40, 53] 1 x [38, 52] 1 x [10, 84] 1 x [35, 57] 1 x [16, 80] 1 x [9, 17, 61] 1 x [18, 82] 1 x [22, 73] 1 x [32, 62] 1 x [4, 29, 59] 1 x [33, 45] 1 x [23, 75] 1 x [79] 1 x [25, 69] 1 x [31, 66] 1 x [36, 55] 1 x [26, 64] 1 x [3, 98] 1 x [39, 47] 1 x [24, 70] 1 x [19, 72] 1 x [21, 74] 1 x [6, 8, 78] 1 x [30, 67] 1 x [34, 58] 1 x [5, 91] 1 x [37, 51] 1 x [28, 46] 1 x [2, 41, 42] 1 x [1, 68]