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#!/usr/bin/env python
#####################
## \file exceptions.py
## \verbatim
## Top contributors (to current version):
## Andres Noetzli
## This file is part of the CVC4 project.
## Copyright (c) 2009-2020 by the authors listed in the file AUTHORS
## in the top-level source directory) and their institutional affiliations.
## All rights reserved. See the file COPYING in the top-level source
## directory for licensing information.\endverbatim
##
## \brief Catching CVC4 exceptions with the legacy Python API.
##
## A simple demonstration of catching CVC4 execptions with the legacy Python
## API.
import CVC4
import sys
def main():
em = CVC4.ExprManager()
smt = CVC4.SmtEngine(em)
smt.setOption("produce-models", CVC4.SExpr("true"))
# Setting an invalid option
try:
smt.setOption("non-existing", CVC4.SExpr("true"))
return 1
except CVC4.Exception as e:
print(e.toString())
# Creating a term with an invalid type
try:
integer = em.integerType()
x = em.mkVar("x", integer)
invalidExpr = em.mkExpr(CVC4.AND, x, x)
smt.checkSat(invalidExpr)
return 1
except CVC4.Exception as e:
print(e.toString())
# Asking for a model after unsat result
try:
smt.checkSat(em.mkBoolConst(False))
smt.getModel()
return 1
except CVC4.Exception as e:
print(e.toString())
return 0
if __name__ == '__main__':
sys.exit(main())
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