[SCIP] vbcfile 4.0.1

[Gotzes, Uwe Dr.]

Dear Marc,

okay, as I understand it, it is no longer necessary to set visual/objextern = FALSE to get a correct vbc outpout. Furthermore lines with "L..." or "U..." always concern primal bounds.

That's nice! Best
Uwe

-----Ursprüngliche Nachricht-----
Von: Scip [mailto:scip-bounces at zib.de] Im Auftrag von Marc Pfetsch
Gesendet: Samstag, 18. November 2017 17:29
An: scip at zib.de
Betreff: Re: [SCIP] vbcfile 4.0.1



Dear Uwe,

the output of vbcfiles is indeed different:

1. The output for maximization problems should be correct now (previously it produced wrong output).

2. There is a message for each new solution ("A ...").


The order should be "A ..." to indicate that a solution has been found.
As a consequence, the bounds are sometimes updated afterwards (but not always, i.e. if the solution does not improve the bound) and a message is printed ("L ..." or "U ...").

Best

Marc



On 16/11/17 12:01, Gotzes, Uwe Dr. wrote:
> Hi,
> 
>  
> 
> I have observed, that the vbcfile is generated in a different manner 
> than before in scip 4.0.1.
> 
>  
> 
> Here is a small example
> 
>  
> 
> #TYPE: COMPLETE TREE
> 
> #TIME: SET
> 
> #BOUNDS: SET
> 
> #INFORMATION: STANDARD
> 
> #NODE_NUMBER: NONE
> 
> 00:00:00.17 N 0 1 3
> 
> 00:00:00.17 I 1 \inode:\t1
> (000000000075B280)\idepth:\t0\nvar:\t-\nbound:\t-100000000000000000000
> .000000
> 
> 00:00:00.18 L 10.000000
> 
> 00:00:00.18 A 1 \nfound better solution: 1.000000
> 
> 00:00:00.18 P 1 14
> 
> 00:00:00.18 L 1.000000
> 
> 00:00:00.18 P 1 11
> 
> 00:00:00.18 A 1 \nfound better solution: 0.000000
> 
> 00:00:00.18 P 1 14
> 
> 00:00:00.18 L 0.000000
> 
>  
> 
> The occurrence of L and A is new, correct? I assume that A indicates, 
> that a better upper bound was found. Hence I would expect a line with 
> the indicator U (upper bound) before a line with the indicator A 
> appears. Or do I get something wrong?
> 
>  
> 
> Best
> 
> Uwe
> 
>  
> 
> 
> 
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