ode_cos.c with h = 0.25 
reached x=0.25, y=0.944702, error=-0.0242103 

ode_cos.c with h = 0.125 
reached x=0.125, y=0.985312, error=-0.00688552 

ode_cos.c with h = 0.0625 
reached x=0.0625, y=0.996213, error=-0.00183419 

ode_cos.c with h = 0.03125 
reached x=0.09375, y=0.994236, error=-0.00137283 

ode_cos.c with h = 0.015625 
reached x=0.140625, y=0.989118, error=-0.00101018 

ode_cos.c with h = 0.0078125 
reached x=0.3125, y=0.950559, error=-0.00100942 

ode_cos.c with h = 0.00390625 
reached x=3.76562, y=-0.812535, error=-0.00100581 

ode_cos.c with h = 0.00195312 
reached x=4.26953, y=-0.429524, error=-0.00100026 

ode_cos.c with h = 0.000976562 
reached x=7.19336, y=0.614609, error=0.00100032 

ode_cos.c with h = 0.000488281 
reached x=10.665, y=-0.325549, error=-0.00100012 

ode_cos.c with h = 0.000244141 
reached x=19.9949, y=0.413757, error=0.00100005 

ode_cos.c with h = 0.00012207 
reached x=35.8729, y=-0.253623, error=-0.00100001 

ode_cos.c with h = 6.10352e-05 
reached x=67.5388, y=-0.0064847, error=-0.001 

ode_cos.c with h = 3.05176e-05 
reached x=133.443, y=0.0754426, error=0.001 

ode_cos.c with h = 1.52588e-05 
reached x=265.369, y=0.0967646, error=0.001