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spot/tests/python/automata.ipynb
Alexandre Duret-Lutz 67b5d2aa9a fix several algorithms that incorrectly preserved !weak 
This massive set of changes was triggered by issue #546.
In addition to the better handling of !weak, this also adds some
weak properties in a few places.

* spot/twaalgos/product.cc (product_aux): Throw some exception
if an automaton with t or f acceptance has the !weak property.  This
is a cheap sanity check to help detect algorithms that incorrectly
assumed !weak input would necessarily become !weak output.
* spot/twaalgos/hoa.cc (print_hoa): Likewise, also do not assume
that terminal implies very-weak.
* spot/parseaut/parseaut.yy: Add several diagnostics for similar
cases.  E.g., a one-state automaton cannot be declared as !very-weak.
* tests/core/parseaut.test: Check those new diagnostics.
* spot/twa/twa.cc (twa::intersecting_run): Temporary remove the weak
property by setting it to maybe, not to false.
* spot/twaalgos/minimize.cc, spot/twaalgos/parity.cc,
spot/twaalgos/sccfilter.cc, spot/twaalgos/simulation.cc: Account for
the fact that these algorithm may in fact improve the weakness.
* spot/twaalgos/strength.cc: Only look at colors used by the
acceptance condition when deciding weakness.
* spot/twaalgos/synthesis.cc: Declare the strategy as weak.
* bin/randaut.cc: Add weak to automata with t/f acceptance.
* spot/kripke/kripke.hh: Make kripke structures as weak.
* tests/core/acc_word.test, tests/core/alternating.test,
tests/core/complement.test, tests/core/complete.test,
tests/core/ltlsynt.test, tests/core/randomize.test,
tests/core/readsave.test, tests/core/remfin.test,
tests/core/sccsimpl.test, tests/core/strength.test,
tests/core/wdba2.test, tests/ltsmin/kripke.test,
tests/python/automata-io.ipynb, tests/python/automata.ipynb,
tests/python/dbranch.py, tests/python/highlighting.ipynb,
tests/python/kripke.py, tests/python/ltsmin-dve.ipynb,
tests/python/mealy.py, tests/python/simstate.py: Adjust all these test
cases.
* NEWS: Mention the fixes.
2023-11-10 23:38:25 +01:00

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"source": [
"from IPython.display import display\n",
"import spot\n",
"from spot.jupyter import display_inline\n",
"spot.setup()"
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"To build an automaton from an LTL formula, simply call `translate()` with a formula, and a list of options to characterize the automaton you want (those options have the same name as the long options name of the `ltl2tgba` tool, and they can be abbreviated)."
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"If you want to add some style options to the existing one, pass a dot to the `show()` function in addition to your own style options:"
]
},
{
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"False"
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"source": [
"%%file example1.aut\n",
"HOA: v1\n",
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"acc-name: Buchi\n",
"Acceptance: 5 Inf(0)&Fin(1)&Fin(4) | Inf(2)&Inf(3) | Inf(1)\n",
"--BODY--\n",
"State: 0 {3}\n",
"[t] 0\n",
"[0] 1 {1}\n",
"[!0] 2 {0 4}\n",
"State: 1 {3}\n",
"[1] 0\n",
"[0&1] 1 {0}\n",
"[!0&1] 2 {2 4}\n",
"State: 2 \n",
"[!1] 0\n",
"[0&!1] 1 {0}\n",
"[!0&!1] 2 {0 4}\n",
"--END--"
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{
"cell_type": "code",
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"source": [
"a = spot.automaton('example1.aut')\n",
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]
},
{
"cell_type": "code",
"execution_count": 18,
"metadata": {},
"outputs": [],
"source": [
"!rm example1.aut"
]
},
{
"cell_type": "code",
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"<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f77307af1e0> >"
]
},
"metadata": {},
"output_type": "display_data"
}
],
"source": [
"import buddy\n",
"display(a)\n",
"b = buddy.bdd_ithvar(a.register_ap('b'))\n",
"for e in a.edges():\n",
" e.cond &= b\n",
"display(a)"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"Adding an atomic proposition to the edge between 0 and 1:"
]
},
{
"cell_type": "code",
"execution_count": 29,
"metadata": {},
"outputs": [
{
"data": {
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],
"text/plain": [
"<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7f77307af1e0> >"
]
},
"execution_count": 29,
"metadata": {},
"output_type": "execute_result"
}
],
"source": [
"c = buddy.bdd_ithvar(a.register_ap('c'))\n",
"for e in a.out(0):\n",
" if e.dst == 1:\n",
" e.cond &= c\n",
"a"
]
},
{
"cell_type": "code",
"execution_count": null,
"metadata": {},
"outputs": [],
"source": []
}
],
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