SYNOPSIS

dve2torx [OPTION]… input<_.dve_|.dve2C>

DESCRIPTION

dve2torx provides access to a labelled transition system from a specification provided in input[.dve|.dveC] via the TorX-Explorer textual interface on stdin and stdout.

DIVINE

Compile a DVE input model with divine:

divine compile -l input.dve

The command results in a compiled model input.dve2C.

If an LTL property is present in the model, a buchi automaton is created. LTSmin can directly perform LTL model checking on such models:

dve2lts-mc --strategy=cndfs --threads=16 anderson.6.prop4.dve2C
dve2lts-seq --por --proviso=color --strategy=scc anderson.6.prop4.dve

These two examples perform LTL model checking using: multi-core NDFS (cndfs), and a sequential SCC-based algorithm with partial order reduction (--por and --proviso, where different provisos are available). Again one can provide additional options to store traces, etc.

Note that this requires a modified version of the DiVinE toolset, which adds an LTSmin compilation backend (option -l). For availability, refer to the LTSmin website.

OPTIONS

PINS Options

--labels

Print state variable, type and value names, and state and action labels. Then exit. Useful for writing predicate (--invariant), LTL (--ltl), CTL/CTL* (--ctl), and mu-calculus (--mu) expressions.

--matrix

Print the dependency matrix and exit.

-c, --cache

Enable caching of greybox calls.

If this option is used, the state space generator makes calls to the short version of the greybox next-state function and memoizes the results. If the next-state function is expensive this will yield substantial speedups.

--pins-guards

Use guards in combination with the long next-state function to speed up the next-state function.

-r, --regroup=SPEC

Enable regrouping optimizations on the dependency matrix.

SPEC is a comma-separated sequence of transformations <(T,)+> which are applied in this order to the dependency matrix. The following transformations T are available:

gs

Group Safely; macro for "gc,gr,cw,rs"; almost always a win.

ga

Group Aggressively (row subsumption); macro for "gc,rs,ru,cw,rs"; can be a huge win, but in some cases causes slower state space generation.

gsa

Group Simulated Annealing; macro for "gc,gr,csa,rs"; almost always a win; usually better than gs.

gc

Group Columns; macro for "cs,cn".

gr

Group Rows; macro for "rs,rn".

cs

Column Sort; sort columns lexicographically.

cn

Column Nub; (temporarily) group duplicate columns, thereby making ca more tractable. Requires cs.

cw

Column sWap; minimize distance between columns by swapping them heuristically. This reordering improves performance of the symbolic data structures.

ca

Column All permutations; try to find the column permutation with the best cost metric. Potentially, this is an expensive operation.

csa

Column Simulated Annealing; minimize distance between columns by swapping them using simulated annealing.

rs

Row Sort; sort rows lexicographically.

rn

Row Nub; remove duplicate rows from the dependency matrix. This is always a win. Requires rs.

ru

Row sUbsume; try to remove more rows than nubbing, thereby trading speed for memory. Requires rs.

w2W

Over-approximate all must-write to may-write. May-write supports the copy (-) dependency.

r2+

Over-approximate read to read+write. Allows read dependencies to also subsume write dependencies.

w2+

Over-approximate must-write to read+write. Allows must-write dependencies to also subsume read dependencies.

W2+

Over-approximate may-write to read+write. Allows must-write dependencies to also subsume read dependencies.

rb4w

Use special heuristics to move read dependencies before write dependences. Often a win in symbolic state space generation.

--mucalc=FILE|FORMULA

Compute a parity game for the mu-calculus formula.

The mu-calculus formula is provided in the file FILE or directly as a string FORMULA. The syntax and tool support are described in ltsmin-mucalc(5).

--por

Activate partial order reduction

Partial Order Reduction can reduce the state space when searching for deadlocks (-d) or accepting cycles (--ltl).

General Options

-v

Increase the level of verbosity

-q

Be quiet; do not print anything to the terminal.

--debug=<file.c>

Enable debugging output for file.c (option allowed multiple times).

--version

Print version string of this tool.

-h, --help

Print help text

--usage

Print short usage summary.

EXIT STATUS

0

Successful termination.

255

Some error occurred.

SUPPORT

Send questions, bug reports, comments and feature suggestions to the LTSmin Support Team.

SEE ALSO