Quickstart

The stand-alone shared memory parallel MIP/MINLP solver FiberSCIP can be used easily via the fscip command. Let's consider the following minimal example in LP format, a 4-variable problem with a single, general integer variable and three linear constraints:

Maximize
 obj: x1 + 2 x2 + 3 x3 + x4
Subject To
 c1: - x1 + x2 + x3 + 10 x4 <= 20
 c2: x1 - 3 x2 + x3 <= 30
 c3: x2 - 3.5 x4 = 0
Bounds
 0 <= x1 <= 40
 2 <= x4 <= 3
General
 x4
End

Saving this file as "simple.lp" allows to read it into FiberSCIP. Create a default parameter file for FiberSCIP:

# Quiet = FALSE
# OutputParaParams = 4 

The column starting with "#" is treated as a comment. Therefore, this parameter file contains all default settings. Save this file as "default.prm" and solve "simple.lp" with these settings by running the command:

fscip default.prm simple.lp -q

This model is solved by using the maximal number of cores on your PC:

The solution file "sample.sol" will be written as below:

[ Final Solution ]
objective value:                                122.5
x4                                                  3 	(obj:1)
x2                                               10.5 	(obj:2)
x3                                               19.5 	(obj:3)
x1                                                 40 	(obj:1)