
Gurobi 11.0.1 (mac64[x86], gurobi_cl) logging started Tue Nov 26 04:10:59 2024

Set parameter Username
Set parameter TimeLimit to value 50
Set parameter LogFile to value "./lp_solutions/grafo1544.45.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/grafo1544.45.lp
Reading time = 0.13 seconds
: 71670 rows, 2389 columns, 216896 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 71670 rows, 2389 columns and 216896 nonzeros
Model fingerprint: 0x09a0e850
Variable types: 45 continuous, 2344 integer (2344 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 11268 rows and 113 columns
Presolve time: 0.55s
Presolved: 60402 rows, 2276 columns, 183282 nonzeros
Variable types: 0 continuous, 2276 integer (2231 binary)
Root relaxation presolved: 2268 rows, 62670 columns, 185558 nonzeros


Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
   21384    4.1951194e+01   0.000000e+00   2.693941e+02      5s
   23309    4.2000000e+01   0.000000e+00   0.000000e+00      5s
   23309    4.2000000e+01   0.000000e+00   0.000000e+00      5s
   23309    4.2000000e+01   0.000000e+00   0.000000e+00      6s

Root relaxation: objective 4.200000e+01, 23309 iterations, 4.77 seconds (2.98 work units)
Total elapsed time = 12.54s (DegenMoves)

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

     0     0   42.00000    0  468          -   42.00000      -     -   14s
H    0     0                      15.0000000   42.00000   180%     -   17s
     0     0   42.00000    0  563   15.00000   42.00000   180%     -   20s
H    0     0                      16.0000000   42.00000   162%     -   21s
     0     0   42.00000    0  558   16.00000   42.00000   162%     -   21s
     0     0   42.00000    0  538   16.00000   42.00000   162%     -   47s
     0     0   42.00000    0  476   16.00000   42.00000   162%     -   48s

Cutting planes:
  Gomory: 1
  Lift-and-project: 1
  Cover: 33
  Clique: 10
  MIR: 107
  StrongCG: 2
  GUB cover: 1
  Zero half: 1
  RLT: 11
  BQP: 1
  PSD: 2

Explored 1 nodes (54232 simplex iterations) in 50.16 seconds (33.80 work units)
Thread count was 8 (of 8 available processors)

Solution count 2: 16 15 

Time limit reached
Best objective 1.600000000000e+01, best bound 4.200000000000e+01, gap 162.5000%

Wrote result file './lp_solutions/grafo1544.45.sol'

