Implementation of INCL4 cascade and ABLA evaporation codes in Geant4

We introduce a new implementation of the Liège cascade INCL4.2 and of the evaporation/fission code ABLA-V3 in Geant4. INCL treats the cascade of hadron, deuterium, tritium, and helium projectiles of energies up to 3 GeV, while ABLA, based on evaporation and fission, provides a treatment of the excited nucleus produced at the end of the cascade. Details of the implementation of INCL and ABLA in the Geant4 9.1 release are presented and C++ performance is compared with the original FORTRAN implementation. A test suite for validating the code translation is based on ROOT software, and we report on advanced features of our testing environment, including scripting and automatic documentation features. In addition, we introduce a Geant4 application using INCL and ABLA models, demonstrating the physics performance and enabling comparisons against another Geant4 intermediate energy hadronic model, the Bertini cascade. Finally we outline the future development of the Liège cascade, INCL5, in the context of the Geant4 hadronic physics framework.