(set-option :verbose true)
(declare-const x Real)
(assert (= (ln x) 1.0))
(debug graph)
(check-sat)
(get-model)
-------------------------
0 ==> true
1 ==> false
2 ==> x
3 ==> (ln $2)
4 ==> 1.0
5 ==> $3 = $4
6 ==> assert $5
delta_sat with absolute precision 0.0000000000000002220446049250313
2 iterations of propagation
0 decisions
  7 narrowing of a value interval
  7 narrowing of a constraint interval
x = [2.718281,2.718282]