\input double a[3];

double adderSeq(int n) {
  double s = 0.0;
  
  for (int i = 0; i < n; i++) {
    s += a[i]; 
  }
  return s;
}

double adderPar(int m) {
  double s = 0.0;
  int mutex = 0;
  \proc workers[m];
  
  void worker(int i) {
    \when (mutex == 0) mutex = 1;
    s += a[i];
    mutex = 0;
  }
  
  for (int i = 0; i < m; i++) {
    workers[i] = \spawn worker(i);
  }  
  for (int j = 0; j < m; j++) {
    \wait workers[j];
  }
  return s;
}

void main() {
  double seq;
  double par;
  
  seq = adderSeq(3);
  par = adderPar(3);
  \assert seq == par;
}