Warning: CHC: Assertion violation happens here.
Counterexample:

e = 0
x = 1

Transaction trace:
test.constructor()
test.g(0)
    e.f() -- untrusted external call
  --> model_checker_ext_calls_untrusted_chc/input.sol:11:3:
   |
11 | 		assert(x == 0);
   | 		^^^^^^^^^^^^^^