Lifetime of the planetary system for different values of the inclination of planet b (the mass is changed accordingly). The time span of the integration is 50 Myr and random initial orbital angles (mean anomaly, pericenter argument, and nodal longitude) have been adopted in addition to the nominal ones in order to make the exploration more complete. The green dot represents the nominal case. For inclinations higher than 30–40 deg, the system becomes unstable on a timescale of shorter than 50 Myr.