# bessolve¶

The tool bessolve can be used to solve a BES. The solution is printed as true or false on the command line output.

Three different solving algorithms have been implemented:

Gauss elimination

This is a straightforward implementation of the Gauss elimination technique. In general it is very inefficient.

Local fixpoints

This is a more advanced form of Gauss elimination. It is efficient if the BES contains no alternating fixed points. For this algorithm a justification for the solution can be printed.

Small progress measures

This is an implementation of the small progress measures algorithm by Marcin Jurdzinski.

Note that a BES can also be solved by the tool pbessolve. This tool uses Zielonka’s algorithm, which often performs better than the ones implemented in bessolve.

## Manual page for bessolve¶

### Usage¶

bessolve   [OPTION]... [INFILE]


### Description¶

Solve the BES in INFILE. If INFILE is not present, stdin is used.

### Command line options¶

-iFORMAT , --inFORMAT

use input format FORMAT:

bes

BES in internal format

pbes

PBES in internal format

pgsolver

BES in PGSolver format

text

PBES in textual (mCRL2) format

-j , --print-justification

print justification for solution. Works only with the local fixpoint strategy.

-sSTRATEGY , --strategySTRATEGY

solve the BES using the specified STRATEGY:

spm

Small progress measures

gauss

Gauss elimination (inefficient; plain implementation)

lf

Local fixpoints (advanced form of Gauss elimination, especially effective without alternating fixed points)

--timings[FILE]

append timing measurements to FILE. Measurements are written to standard error if no FILE is provided

#### Standard options¶

-q , --quiet

do not display warning messages

-v , --verbose

display short intermediate messages

-d , --debug

display detailed intermediate messages

--log-levelLEVEL

display intermediate messages up to and including level

-h , --help

display help information

--version

display version information

Jeroen Keiren