Build (method = -2) #dp: 2169 Step-3' Graph: 94 vertices and 292 arcs (0.01s) Step-4' Graph: 20 vertices and 144 arcs (0.01s) #V4/#V3 = 0.21 #A4/#A3 = 0.49 Ready! (0.01s) Optimize a model with 84 rows, 145 columns and 400 nonzeros Presolve removed 45 rows and 58 columns Presolve time: 0.00s Presolved: 39 rows, 87 columns, 224 nonzeros Variable types: 0 continuous, 87 integer (11 binary) Found heuristic solution: objective 93.0000000 Found heuristic solution: objective 67.0000000 Optimize a model with 39 rows, 87 columns and 224 nonzeros Presolve removed 1 rows and 1 columns Presolved: 38 rows, 86 columns, 222 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 7.300e+01 Factor NZ : 5.170e+02 Factor Ops : 1.048e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 1.34689257e+03 -1.13804897e+03 8.58e+01 2.22e-16 4.20e+01 0s 1 3.14830488e+02 -3.82336544e+02 1.09e+01 7.77e-16 6.32e+00 0s 2 8.66690042e+01 -3.23100624e+01 8.77e-02 2.33e-15 6.27e-01 0s 3 6.54752767e+01 3.64552577e+01 3.33e-03 1.11e-15 1.50e-01 0s 4 6.00772999e+01 5.87193428e+01 2.05e-07 5.55e-16 7.04e-03 0s 5 6.00000027e+01 5.99999667e+01 8.15e-12 1.33e-15 1.87e-07 0s 6 6.00000000e+01 6.00000000e+01 2.53e-14 5.55e-16 1.99e-13 0s Barrier solved model in 6 iterations and 0.00 seconds Optimal objective 6.00000000e+01 Root relaxation: objective 6.000000e+01, 43 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 60.0000000 60.00000 0.0% - 0s Explored 0 nodes (43 simplex iterations) in 0.01 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 6.000000000000e+01, best bound 6.000000000000e+01, gap 0.0% Preprocessing time: 0.02 seconds Gurobi run time: 0.01 seconds Total run time: 0.02 seconds Objective: 60 Solution: 2 x [24, 64] 1 x [26, 63] 1 x [25, 62] 2 x [28, 61] 1 x [21, 60] 3 x [3, 59] 2 x [32, 58] 3 x [2, 57] 2 x [17, 56] 1 x [36, 55] 2 x [11, 54] 3 x [36, 53] 2 x [2, 52] 1 x [41, 51] 2 x [1, 50] 1 x [9, 49] 1 x [7, 48] 1 x [45, 47] 1 x [5, 47] 1 x [42, 46] 1 x [4, 46] 4 x [40, 45] 2 x [1, 44] 1 x [40, 43] 2 x [8, 39] 1 x [12, 38] 1 x [10, 37] 1 x [14, 35] 1 x [19, 34] 1 x [20, 33] 1 x [30, 31] 1 x [22, 29] 3 x [15, 27] 2 x [16, 23] 3 x [13, 18] 2 x [6, 18]