PVS-Studio warning V557 for Geant4

void
G4HEInelastic::MediumEnergyClusterProduction(....)
{
  ....
  G4double alem[] = {1.40, 2.30, 2.70, 3.00, 3.40, 4.60, 7.00};
  ....
  for (j = 1; j < 8; j++) {
    if (alekw < alem[j]) {
      jmax = j;
      break;
    }
  }
  ....
}

This suspicious code was found in Geant4 project by PVS-Studio static code analyzer.
Warning message is:
V557 Array overrun is possible. The value of 'j' index could reach 7. g4heinelastic.cc 4682

PVS-Studio is a static analyzer for detecting bugs in the source code of applications written in C, C++, C++11, C++/CX. Site: http://www.viva64.com/en/pvs-studio/