Build (method = -2) #dp: 1156 Step-3' Graph: 48 vertices and 175 arcs (0.01s) Step-4' Graph: 24 vertices and 127 arcs (0.01s) #V4/#V3 = 0.50 #A4/#A3 = 0.73 Ready! (0.01s) Optimize a model with 86 rows, 128 columns and 340 nonzeros Presolve removed 55 rows and 59 columns Presolve time: 0.00s Presolved: 31 rows, 69 columns, 169 nonzeros Variable types: 0 continuous, 69 integer (10 binary) Found heuristic solution: objective 84.0000000 Found heuristic solution: objective 78.0000000 Found heuristic solution: objective 73.0000000 Optimize a model with 31 rows, 69 columns and 169 nonzeros Presolved: 31 rows, 69 columns, 169 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 5.900e+01 Factor NZ : 4.960e+02 Factor Ops : 1.042e+04 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 6.37190309e+02 -7.68821935e+02 4.36e+01 1.11e-16 2.44e+01 0s 1 1.82011771e+02 -1.79626298e+02 4.83e+00 6.66e-16 3.53e+00 0s 2 9.02947397e+01 3.66738467e+01 1.91e-14 4.44e-16 3.60e-01 0s 3 7.40945252e+01 5.63164466e+01 3.82e-14 6.66e-16 1.19e-01 0s 4 6.71350325e+01 6.53468111e+01 7.83e-15 4.44e-16 1.20e-02 0s 5 6.65890176e+01 6.64390203e+01 1.02e-14 3.33e-16 1.01e-03 0s 6 6.65000956e+01 6.64999247e+01 1.16e-14 3.33e-16 1.15e-06 0s 7 6.65000000e+01 6.65000000e+01 5.33e-15 3.33e-16 1.16e-12 0s Barrier solved model in 7 iterations and 0.00 seconds Optimal objective 6.65000000e+01 Root relaxation: objective 6.650000e+01, 14 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 66.50000 0 2 73.00000 66.50000 8.90% - 0s H 0 0 67.0000000 66.50000 0.75% - 0s Explored 0 nodes (15 simplex iterations) in 0.00 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 6.700000000000e+01, best bound 6.700000000000e+01, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.00 seconds Total run time: 0.02 seconds Objective: 67 Solution: 1 x [62] 1 x [61] 4 x [60] 2 x [59] 3 x [58] 2 x [57] 1 x [56] 1 x [55] 1 x [54] 1 x [53] 2 x [52] 2 x [51] 5 x [50] 2 x [49] 4 x [48] 1 x [1, 47] 1 x [46] 1 x [2, 46] 1 x [3, 45] 2 x [4, 44] 1 x [5, 43] 2 x [6, 42] 1 x [7, 41] 1 x [10, 40] 1 x [8, 39] 1 x [11, 38] 1 x [7, 37] 1 x [13, 36] 1 x [5, 35] 2 x [12, 34] 2 x [9, 34] 1 x [15, 33] 1 x [14, 33] 1 x [16, 32] 1 x [17, 31] 1 x [17, 30] 1 x [3, 29] 1 x [20, 28] 2 x [19, 28] 2 x [18, 27] 1 x [22, 26] 1 x [21, 25] 1 x [23, 24] 1 x [23]