Real sleepmode WITHOUT hibernation
Try this:

#power management settings
pmset -g | grep hibernatemode

#remove forcefully
sudo rm -f /var/vm/sleepimage

#0 means normal sleep and is the default for desktops
sudo pmset -a hibernatemode 0   

#1 means hibernate mode and is the default for older portables (pre 2005)
sudo pmset hibernatemode 1 

#3 means safe sleep and is the default for portables made after 2005
sudo pmset hibernatemode 3  

#25 is the same as hibernate mode, but is the setting used for newer (post 2005) Mac portables
sudo pmset hibernatemode 25