[Vol] different results using two Vol examples

[Jiadong Wang]

I was trying Vol using executables in  Vol example folder,  for a miplib
linstance rout.mps, to get lower bound of its LP. I guess these two should
give the same results , more or less. Any insight? Thanks

One is the VolLP, whose results does not make senes,
......
**** G= 0, Y= 0, R= 50 ****
1700. L=0.000000 P=0.000000 vu=-nan infeas=-nan
 asc=inf vmax=inf P-vu=-nan xrc =0.000000
**** G= 0, Y= 0, R= 50 ****
1750. L=0.000000 P=0.000000 vu=-nan infeas=-nan
 asc=inf vmax=inf P-vu=-nan xrc =0.000000
**** G= 0, Y= 0, R= 50 ****
1800. L=0.000000 P=0.000000 vu=-nan infeas=-nan
 asc=inf vmax=inf P-vu=-nan xrc =0.000000
**** G= 0, Y= 0, R= 50 ****
1850. L=0.000000 P=0.000000 vu=-nan infeas=-nan
 asc=inf vmax=inf P-vu=-nan xrc =0.000000
**** G= 0, Y= 0, R= 50 ****
1900. L=0.000000 P=0.000000 vu=-nan infeas=-nan
 asc=inf vmax=inf P-vu=-nan xrc =0.000000
**** G= 0, Y= 0, R= 50 ****
1950. L=0.000000 P=0.000000 vu=-nan infeas=-nan
 asc=inf vmax=inf P-vu=-nan xrc =0.000000
**** G= 0, Y= 0, R= 50 ****
2000. L=0.000000 P=0.000000 vu=-nan infeas=-nan
 asc=inf vmax=inf P-vu=-nan xrc =0.000000
**** G= 0, Y= 0, R= 50 ****
2001. L=0.000000 P=0.000000 vu=-nan infeas=-nan
 asc=inf vmax=inf P-vu=-nan xrc =0.000000
Best lagrangean value: 0.000000
Average primal constraint violation: -nan

But the Volume-LP example, gives a reasonable results

........
500. L=403.174961 P=403.527896 vu=-3.564675 infeas=0.000059
 asc=498.000000 vmax=0.040422 P-vu=407.092570 xrc =4.016982
**** G= 0, Y= 2, R= 18 ****

 **** decreasing lamda to 0.000417536 *****

520. L=403.355470 P=403.449490 vu=-3.070856 infeas=0.000059
 asc=761.000000 vmax=0.030892 P-vu=406.520345 xrc =3.337415
**** G= 0, Y= 3, R= 17 ****
540. L=403.371622 P=403.759852 vu=-2.295101 infeas=0.000058
 asc=846.000000 vmax=0.038478 P-vu=406.054953 xrc =2.778099
**** G= 0, Y= 4, R= 16 ****
 ------------decreasing alpha to 0.002500
560. L=403.373601 P=403.526743 vu=-2.135676 infeas=0.000054
 asc=643.000000 vmax=0.038183 P-vu=405.662419 xrc =2.459017
**** G= 0, Y= 1, R= 19 ****
 small lp gap
575. L=403.410024 P=403.700934 vu=-1.823046 infeas=0.000036
 asc=780.000000 vmax=0.019974 P-vu=405.523980 xrc =2.262001
 Average violation of final solution: 0.000386192
 Total Time: 1.82 secs



-- 
Jiadong Wang
Harold S. Mohler Laboratory
Lehigh University
200 West Packer Avenue
Bethlehem, PA 18015-1582

Phone No: 484-707-8895
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