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python: add a %%pml magic

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Fixes #162.

* python/spot/ltsmin.i: Implement the magic.
* NEWS: Mention it.
* tests/python/ltsmin-pml.ipynb: New file.
* tests/Makefile.am, doc/org/tut.org: Add it.
* tests/python/ipnbdoctest.py: Adjust.
This commit is contained in:
Alexandre Duret-Lutz 2016-06-12 12:53:55 +02:00
parent a7e4395f9d
commit 272daf62fc
6 changed files with 564 additions and 14 deletions
Download patch file Download diff file Expand all files Collapse all files

5
NEWS
View file

@ -65,6 +65,11 @@ New in spot 2.0.1a (not yet released)
* Bindings for language_containment_checker were added.
* Under IPython the spot.ltsmin modules nows offers a
%%pml magic do define promela models, compile them
with spins, and dynamically load them. This is
akin to the %%dve magic that was already supported.
Documentation:
* A new example page shows how to test the equivalence of

4
doc/org/tut.org
View file

@ -63,8 +63,8 @@ real notebooks instead.
- [[https://spot.lrde.epita.fr/ipynb/decompose.html][=decompose.ipynb=]] illustrates the =decompose_strength()= function
- [[https://spot.lrde.epita.fr/ipynb/testingaut.html][=testingaut.ipynb=]] shows the steps necessary to build a testing
automaton
- [[https://spot.lrde.epita.fr/ipynb/ltsmin-dve.html][=ltsmin-dve.ipynb=]] minimal test for loading a DiVinE model using
the LTSmin interface.
- [[https://spot.lrde.epita.fr/ipynb/ltsmin-dve.html][=ltsmin-dve.ipynb=]] loading a DiVinE model using the LTSmin interface.
- [[https://spot.lrde.epita.fr/ipynb/ltsmin-pml.html][=ltsmin-pml.ipynb=]] loading a Promela model using the LTSmin interface.
- [[https://spot.lrde.epita.fr/ipynb/word.html][=word.ipynb=]] example for the =twa_run= and =twa_word= classes.
- [[https://spot.lrde.epita.fr/ipynb/highlighting.html][=highlighting.ipynb=]] shows how to highlight states or edges in
automata.

48
python/spot/ltsmin.i
View file

@ -106,25 +106,31 @@ class model:
res += '\n';
return res
def require(tool):
def require(*tools):
"""
Exit with status code 77 if the required tool is not installed.
This function is mostly useful in Spot test suite, where 77 is a
code used to indicate that some test should be skipped.
"""
if tool != "divine":
raise ValueError("unsupported argument for require(): " + tool)
import shutil
for tool in tools:
if tool == "divine":
if shutil.which("divine") == None:
print ("divine not available", file=sys.stderr)
print("divine not available", file=sys.stderr)
sys.exit(77)
out = subprocess.check_output(['divine', 'compile',
'--help'], stderr=subprocess.STDOUT)
out = subprocess.check_output(['divine', 'compile', '--help'],
stderr=subprocess.STDOUT)
if b'LTSmin' not in out:
print ("divine available but no support for LTSmin",
print("divine available but no support for LTSmin",
file=sys.stderr)
sys.exit(77)
elif tool == "spins":
if shutil.which("spins") == None:
print("spins not available", file=sys.stderr)
sys.exit(77)
else:
raise ValueError("unsupported argument for require(): " + tool)
# Load IPython specific support if we can.
@ -166,8 +172,36 @@ try:
spot.aux.rm_f(t.name + '.cpp')
spot.aux.rm_f(t.name + '2C')
@magics_class
class EditPML(Magics):
@cell_magic
def pml(self, line, cell):
if not line:
raise ValueError("missing variable name for %%pml")
with tempfile.NamedTemporaryFile(dir='.', suffix='.pml') as t:
t.write(cell.encode('utf-8'))
t.flush()
try:
p = subprocess.Popen(['spins', t.name],
stdout=subprocess.PIPE,
stderr=subprocess.STDOUT,
universal_newlines=True)
out = p.communicate()
if out[0]:
print(out[0], file=sys.stderr)
ret = p.wait()
if ret:
raise subprocess.CalledProcessError(ret, 'spins')
self.shell.user_ns[line] = load(t.name + '.spins')
finally:
spot.aux.rm_f(t.name + '.spins.c')
spot.aux.rm_f(t.name + '.spins')
ip = get_ipython()
ip.register_magics(EditDVE)
ip.register_magics(EditPML)
except (ImportError, NameError):
pass

1
tests/Makefile.am
View file

@ -297,6 +297,7 @@ TESTS_ipython = \
python/formulas.ipynb \
python/highlighting.ipynb \
python/ltsmin-dve.ipynb \
python/ltsmin-pml.ipynb \
python/piperead.ipynb \
python/product.ipynb \
python/randaut.ipynb \

4
tests/python/ipnbdoctest.py
View file

@ -71,6 +71,10 @@ def sanitize(s):
# normalize graphviz version
s = re.sub(r'Generated by graphviz version.*', 'VERSION', s)
# remove Spins verbose output version
s = re.sub(r'SpinS Promela Compiler.*Compiled C model to .*pml.spins',
'SpinS output', s, flags=re.DOTALL)
# SVG generated by graphviz may put note at different positions
# depending on the graphviz build. Let's just strip anything that
# look like a position.

506
tests/python/ltsmin-pml.ipynb Normal file
View file

@ -0,0 +1,506 @@
{
"metadata": {
"kernelspec": {
"display_name": "Python 3",
"language": "python",
"name": "python3"
},
"language_info": {
"codemirror_mode": {
"name": "ipython",
"version": 3
},
"file_extension": ".py",
"mimetype": "text/x-python",
"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython3",
"version": "3.5.1"
},
"name": "",
"signature": "sha256:bbe178ef6526ace33fca472e0e20c706861b6b033a70d184f5a219c60812d5b7"
},
"nbformat": 3,
"nbformat_minor": 0,
"worksheets": [
{
"cells": [
{
"cell_type": "code",
"collapsed": false,
"input": [
"import spot\n",
"import spot.ltsmin\n",
"# The following line causes the notebook to exit with 77 if spins is not \n",
"# installed, therefore skipping this test in the test suite.\n",
"spot.ltsmin.require('spins')\n",
"spot.setup()"
],
"language": "python",
"metadata": {},
"outputs": [],
"prompt_number": 1
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"There are two ways to load a Promela model: from a file or from a cell. \n",
"\n",
"Loading from a cell\n",
"-------------------\n",
"\n",
"Using the `%%pml` magic will save the model in a temporary file, call `spins` to compile it, load the resulting shared library, and store the result into an object whose name is passed as an argument to `%%pml`."
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"%%pml model\n",
"active proctype P() {\n",
"int a = 0;\n",
"int b = 0;\n",
"x: if\n",
" :: d_step {a < 3 && b < 3; a = a + 1; } goto x;\n",
" :: d_step {a < 3 && b < 3; b = b + 1; } goto x;\n",
"fi;\n",
"}"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stderr",
"text": [
"SpinS Promela Compiler - version 1.0 (5-Feb-2013)\n",
"(C) University of Twente, Formal Methods and Tools group\n",
"\n",
"Start parsing tmplq2ksakk.pml...done\n",
"\n",
"Optimizing graphs...\n",
" StateMerging changed 0 states/transitions.\n",
" RemoveUselessActions changed 2 states/transitions.\n",
" RemoveUselessGotos changed 2 states/transitions.\n",
" RenumberAll changed 1 states/transitions.\n",
"Optimization done\n",
"\n",
"Generating DM information ...\n",
"Generating DM information done\n",
"\n",
"Generating guard information ...\n",
" Found 0 / 4 ( 0.0%) !MCE guards.\n",
" Found 3 / 8 ( 37.5%) !IMC guards.\n",
" Found 6 / 6 (100.0%) !NES guards.\n",
" Found 6 / 6 (100.0%) !NDS guards.\n",
" Found 6 / 6 (100.0%) !visibilities.\n",
"Generating guard information done\n",
"\n",
"Written C model to /home/adl/git/spot/tests/python/tmplq2ksakk.pml.spins.c\n",
"Compiled C model to tmplq2ksakk.pml.spins\n",
"\n"
]
}
],
"prompt_number": 2
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"Yes, the `spins` compiler is quite verbose. Printing the resulting `model` object will show information about the variables in that model. "
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"model"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 3,
"text": [
"ltsmin model with the following variables:\n",
" _nr_pr: int\n",
" P_0._pc: pc\n",
" P_0._pid: pid\n",
" P_0.a: int\n",
" P_0.b: int"
]
}
],
"prompt_number": 3
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"To instantiate a Kripke structure, one should provide a list of atomic proposition to observe."
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"k = model.kripke(['P_0.a < 2', 'P_0.b > 1']); k"
],
"language": "python",
"metadata": {},
"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 4,
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"<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.1//EN\"\n",
" \"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\">\n",
"<!-- Generated by graphviz version 2.38.0 (20140413.2041)\n",
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]
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{
"cell_type": "markdown",
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"And then from this Kripke structure you can do some model checking using the same functions as illustrated in `ltsmin-dve.ipynb`.\n",
"\n",
"Loading from a `*.pml` file\n",
"---------------------------\n",
"\n",
"Another option is to use `ltsmin.load()` to load a Promela file directly. In order for this test-case to be self-contained, we are going to write the Promela file first, but in practice you probably already have your model."
]
},
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"cell_type": "code",
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"input": [
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],
"language": "python",
"metadata": {},
"outputs": [],
"prompt_number": 5
},
{
"cell_type": "code",
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"input": [
"%%file test1.pml\n",
"active proctype P() {\n",
"int a = 0;\n",
"int b = 0;\n",
"x: if\n",
" :: d_step {a < 3 && b < 3; a = a + 1; } goto x;\n",
" :: d_step {a < 3 && b < 3; b = b + 1; } goto x;\n",
"fi;\n",
"}"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Writing test1.pml\n"
]
}
],
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{
"cell_type": "markdown",
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"source": [
"Now load it:"
]
},
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"input": [
"model2 = spot.ltsmin.load('test1.pml')"
],
"language": "python",
"metadata": {},
"outputs": [],
"prompt_number": 7
},
{
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],
"language": "python",
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"outputs": [
{
"metadata": {},
"output_type": "pyout",
"prompt_number": 8,
"text": [
"ltsmin model with the following variables:\n",
" _nr_pr: int\n",
" P_0._pc: pc\n",
" P_0._pid: pid\n",
" P_0.a: int\n",
" P_0.b: int"
]
}
],
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"cell_type": "code",
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],
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"outputs": [],
"prompt_number": 9
}
],
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}
]
}