
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Mon Nov 25 03:06:35 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo6478.38.log"
Using license file /Users/sara/gurobi.lic
Academic license - for non-commercial use only - expires 2025-05-12

Gurobi Optimizer version 11.0.1 build v11.0.1rc0 (mac64[x86] - Darwin 21.6.0 21G651)
Copyright (c) 2024, Gurobi Optimization, LLC

Read LP format model from file ./lp_problems/grafo6478.38.lp
Reading time = 0.15 seconds
: 88891 rows, 2095 columns, 268445 nonzeros

CPU model: Intel(R) Core(TM) i5-1038NG7 CPU @ 2.00GHz
Thread count: 4 physical cores, 8 logical processors, using up to 8 threads

Optimize a model with 88891 rows, 2095 columns and 268445 nonzeros
Model fingerprint: 0xfbe8fde5
Variable types: 46 continuous, 2049 integer (2049 binary)
Coefficient statistics:
  Matrix range     [5e-01, 5e+01]
  Objective range  [1e+00, 1e+00]
  Bounds range     [1e+00, 1e+00]
  RHS range        [1e+00, 5e+01]
Presolve removed 23907 rows and 36 columns
Presolve time: 0.63s
Presolved: 64984 rows, 2059 columns, 197191 nonzeros
Variable types: 0 continuous, 2059 integer (2013 binary)
Found heuristic solution: objective 5.0000000
Root relaxation presolved: 2059 rows, 67043 columns, 199250 nonzeros


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   25399    4.5956313e+01   0.000000e+00   1.988962e+04      5s
   51166    4.5947862e+01   0.000000e+00   3.417677e+02     10s
   59650    4.6000000e+01   0.000000e+00   0.000000e+00     12s
   59650    4.6000000e+01   0.000000e+00   0.000000e+00     12s

Root relaxation: objective 4.600000e+01, 59650 iterations, 10.95 seconds (9.85 work units)
Total elapsed time = 21.68s (DegenMoves)

    Nodes    |    Current Node    |     Objective Bounds      |     Work
 Expl Unexpl |  Obj  Depth IntInf | Incumbent    BestBd   Gap | It/Node Time

     0     0   46.00000    0  469    5.00000   46.00000   820%     -   24s
H    0     0                       9.0000000   46.00000   411%     -   25s
     0     0   46.00000    0  763    9.00000   46.00000   411%     -   34s
     0     0   46.00000    0  748    9.00000   46.00000   411%     -   36s
     0     0   46.00000    0  775    9.00000   46.00000   411%     -   50s

Cutting planes:
  Gomory: 3
  Lift-and-project: 28
  Cover: 7
  Clique: 17
  MIR: 157
  StrongCG: 1
  GUB cover: 1
  Zero half: 51
  RLT: 63
  BQP: 1
  PSD: 1

Explored 1 nodes (87555 simplex iterations) in 50.11 seconds (45.25 work units)
Thread count was 8 (of 8 available processors)

Solution count 2: 9 5 

Time limit reached
Best objective 9.000000000000e+00, best bound 4.600000000000e+01, gap 411.1111%

Wrote result file './lp_solutions/grafo6478.38.sol'

