Re: [Help-glpk] help with .bv. model

[Andrew Makhorin]

> I am trying to count shift calendar problem, in the attachment you can see my 
> model
> 
> after some seconds i got optimal solution and trying to find integer 
> solution, but after hours i have only this kind of output: 
> +6434641: mip =   1.920000000e+02 >=   1.900000000e+02   1.0% (125068; 112713)
> ^^^rising                ^^^ not going down anymore
> 
> is it ok? do i have some problem in model?

This means that your model is hard for glpk b&b solver.

If a suboptimal solution (i.e. 192) is sufficient for you, you can
limit the solution time with the command-line option `--tmlim nnn';
note that the exact optimum is either 190 or 191 or 192.

Also you can try using the options `--intopt' or `--cuts'; sometimes
this helps.