def smt_to_string(constraint, status="unknown", name="benchmark", logic=""):
v = (z3.Ast * 0)()
return z3.Z3_benchmark_to_smtlib_string(
constraint.ctx_ref(), name, logic, status, "",
0, v, constraint.as_ast()).replace("\n", " ").replace(
"(check-sat)",
"").replace("; benchmark (set-info :status unknown)", "").strip()
def back_via_smtlib(self, expr):
"""Back convert a Z3 Expression by translation to SMT-LIB."""
from six import StringIO
from pysmt.smtlib.parser import SmtLibZ3Parser
parser = SmtLibZ3Parser(self.env)
z3.Z3_set_ast_print_mode(expr.ctx.ref(), z3.Z3_PRINT_SMTLIB2_COMPLIANT)
s = z3.Z3_benchmark_to_smtlib_string(expr.ctx.ref(), None, None, None,
None, 0, None, expr.ast)
stream_in = StringIO(s)
r = parser.get_script(stream_in).get_last_formula(self.mgr)
key = (askey(expr), None)
self._back_memoization[key] = r
return r
def toSMT2Benchmark(f, status="unknown", name="benchmark", logic=""):
v = (z3.Ast * 0)()
return z3.Z3_benchmark_to_smtlib_string(f.ctx_ref(), name, logic, status,
"", 0, v, f.as_ast())
