** Calling: z3 -nw -in -smt2 [GOOD] ; Automatically generated by SBV. Do not edit. [GOOD] (set-option :print-success true) [GOOD] (set-option :global-declarations true) [GOOD] (set-option :smtlib2_compliant true) [GOOD] (set-option :diagnostic-output-channel "stdout") [GOOD] (set-option :produce-models true) [GOOD] (set-logic QF_FP) [GOOD] ; --- uninterpreted sorts --- [GOOD] ; --- tuples --- [GOOD] ; --- sums --- [GOOD] ; --- literal constants --- [GOOD] (define-fun s1 () RoundingMode roundNearestTiesToEven) [GOOD] ; --- skolem constants --- [GOOD] (declare-fun s0 () (_ FloatingPoint 8 24)) ; tracks user variable "x" [GOOD] ; --- constant tables --- [GOOD] ; --- skolemized tables --- [GOOD] ; --- arrays --- [GOOD] ; --- uninterpreted constants --- [GOOD] ; --- user given axioms --- [GOOD] ; --- formula --- [GOOD] (define-fun s2 () (_ FloatingPoint 8 24) (fp.fma s1 s0 s0 s0)) [GOOD] (define-fun s3 () Bool (fp.eq s0 s2)) [GOOD] (assert s3) [SEND] (check-sat) [RECV] sat [SEND] (get-value (s0)) [RECV] ((s0 (fp #b0 #x40 #b00000001000000000010000))) *** Solver : Z3 *** Exit code: ExitSuccess [VALIDATE] Validating the model. Assignment: [VALIDATE] x = 1.0884394e-19 :: Float [VALIDATE] There are no constraints to check. [VALIDATE] Validating outputs. FINAL OUTPUT: *** Data.SBV: Cannot validate the model, since s4 is not concretely computable. *** *** Assignment: *** *** x = 1.0884394e-19 :: Float *** *** Floating point FMA operation is not supported concretely. *** *** SBV's model validator is incomplete, and cannot handle this particular case. *** Please report this as a feature request or possibly a bug! *** *** Alleged model: *** *** Satisfiable. Model: *** x = 1.0884394e-19 :: Float