Illustration of the limit cycle instability in the accretion disk. Left panel: local stability curve (blue line). The outburst cycle for a black hole mass 10 M_⊙ and R = 40R_schw for a base model without R_ADAF and R_out = 300R_schw is indiated. Right panel: exemplary fragment of the disk light curve. The cycle steps are indicated for a black hole mass 10 M_⊙. The following steps of the cycle are colored: the black part of the light curve represents the heating phase, the green part shows the advective phase, and the red part represents the diffusive phase. The colored arrows indicate the direction of the cycle anticlockwise.