Average Error: 0.0 → 0.0
Time: 10.9s
Precision: 64
\[\left(a + b\right) \cdot \left(a + b\right)\]
↓
\[a \cdot \left(b + a\right) + \left(b + a\right) \cdot b\]
double f(double a, double b) {
        double r11927731 = a;
        double r11927732 = b;
        double r11927733 = r11927731 + r11927732;
        double r11927734 = r11927733 * r11927733;
        return r11927734;
}
↓
double f(double a, double b) {
        double r11927735 = a;
        double r11927736 = b;
        double r11927737 = r11927736 + r11927735;
        double r11927738 = r11927735 * r11927737;
        double r11927739 = r11927737 * r11927736;
        double r11927740 = r11927738 + r11927739;
        return r11927740;
}


\left(a + b\right) \cdot \left(a + b\right)
↓
a \cdot \left(b + a\right) + \left(b + a\right) \cdot b

Error

Bits error versus a

Bits error versus b

Target

Original0.0
Target0.0
Herbie0.0
\[\left(\left(b \cdot a + b \cdot b\right) + b \cdot a\right) + a \cdot a\]

Derivation

  1. Initial program 0.0

    \[\left(a + b\right) \cdot \left(a + b\right)\]
  2. Using strategy rm

  3. Applied distribute-lft-in0.0

    \[\leadsto \color{blue}{\left(a + b\right) \cdot a + \left(a + b\right) \cdot b}\]

  4. Final simplification0.0

    \[\leadsto a \cdot \left(b + a\right) + \left(b + a\right) \cdot b\]

Reproduce

herbie shell --seed 2019102 
(FPCore (a b)
  :name "Expression 4, p15"
  :pre (and (<= 5 a 10) (<= 0 b 0.001))

  :herbie-target
  (+ (+ (+ (* b a) (* b b)) (* b a)) (* a a))

  (* (+ a b) (+ a b)))