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Length of proof is 22.  Level of proof is 9.

---------------- PROOF ----------------

1 [] il(t,c,r,cs)=b2.
3 [] s(a,c2)=c.
8 [] T(x,y,ext(x,y,w,v)).
34 [] -T(xa,xb,xc)|T(xc,xb,xa).
35 [] T(xa,xa,xb).
69 [] Col(xa,xb,xc)| -T(xa,xb,xc).
117 [] -sameside(xa,xp,xb)|Col(xa,xp,xb).
120 [] xa=xp|sameside(xa,xp,xa).
132 [] -M(xa,xm,xb)|T(xa,xm,xb).
139 [] M(x,xa,s(xa,x)).
141 [] s(x,s(x,y))=y.
142 [] s(xa,xp)!=xr|s(xa,xq)!=xr|xp=xq.
145 [] xp!=xa|s(xa,xp)=xp.
222 [] xp=xq|Col(xp,xq,xa)|Col(xp,xq,xb)| -T(xa,xt,xb)| -Col(xp,xq,xt)|opposite(xa,xp,xq,xb).
225 [] -opposite(xa,xp,xq,xb)|T(xa,il(xa,xb,xp,xq),xb).
226 [] -opposite(xa,xp,xq,xb)|Col(xp,xq,il(xa,xb,xp,xq)).
244 [] -opposite(xa,xp,xq,xc)|opposite(xb,xp,xq,xc)| -samesideline(xa,xb,xp,xq).
249 [] -samesideline(x,y,u,v)|samesideline(y,x,u,v).
250 [] xp=xq|Col(xp,xq,xs)|Col(xp,xq,xr)|opposite(xr,xp,xq,xs)|samesideline(xr,xs,xp,xq).
295 [] -parallel(xA,yA,xB,yB)| -Col(xA,yA,x)| -Col(xB,yB,x).
303 [] -Col(u,v,x)| -Col(u,v,y)|u=v|Col(u,v,s(y,x)).
325 [] x=x.
326 [] t!=q.
328 [] r!=cs.
329 [] Col(r,cs,a).
330 [] p1!=p2.
331 [] Col(p1,p2,a).
333 [] parallel(t,q,r,cs).
335 [] -T(xc,xb,t)| -Col(p1,p2,xc)| -Col(r,cs,xb)|xc=a.
336 [] c!=a.
337 [] -opposite(t,r,cs,c2).
338 [] c2=ext(p1,p2,p1,a).
339 [] c=s(a,c2).
349 [binary,325.1,145.1] s(x,x)=x.
401 [binary,326.1,120.1] sameside(t,q,t).
1145 [para_from,338.1.2,8.1.3] T(p1,p2,c2).
1177 [para_from,339.1.2,141.1.1.2] s(a,c)=c2.
1179 [para_from,339.1.2,139.1.3] M(c2,a,c).
1203 [ur,142,349,336] s(a,c)!=a.
1245 [binary,401.1,117.1] Col(t,q,t).
1290 [binary,1145.1,69.2] Col(p1,p2,c2).
1452 [binary,1179.1,132.1] T(c2,a,c).
1560 [para_into,1203.1.1,1177.1.1] c2!=a.
1690 [ur,295,333,1245] -Col(r,cs,t).
1747 [hyper,303,1290,331,demod,3,unit_del,330] Col(p1,p2,c).
2053 [ur,335,35,1290,1560] -Col(r,cs,c2).
2440 [ur,335,35,1747,336] -Col(r,cs,c).
2496 [ur,250,328,2053,1690,337] samesideline(t,c2,r,cs).
2541 [ur,222,328,2053,2440,1452,329] opposite(c2,r,cs,c).
2549 [binary,2496.1,249.1] samesideline(c2,t,r,cs).
2614 [hyper,244,2541,2549] opposite(t,r,cs,c).
2631 [binary,2614.1,226.1,demod,1] Col(r,cs,b2).
2632 [binary,2614.1,225.1,demod,1] T(t,b2,c).
2810 [ur,335,1747,2631,336] -T(c,b2,t).
2865 [binary,2632.1,34.1] T(c,b2,t).
2866 [binary,2865.1,2810.1] $F.