Added SCC cycle test

test/scc4.test

@@ -1,8 +1,8 @@
 // SCC test, with a long path, and a branch in the middle
 // that goes to a minimum value
 
-N = 100
-N2 = 50
+N = 100000
+N2 = 50000
 
 V1 = 1
 V2 = N+V1

test/scc5.test

@@ -0,0 +1,41 @@
+// SCC test with a single long path, with small cycles
+// between pairs of vertices
+
+N = 100000
+
+V1 = 1
+V2 = N-1+V1
+V3 = N+V2
+
+E1 = 1
+E2 = N-1+E1
+E3 = N-1+E2
+E4 = N-1+E3
+
+off1b = r(V1, 1)-r(E1, 1) 
+off2b = r(V3, 1)-r(E2, 1)-1
+off3b = r(V2, 1)-r(E3, 1)
+off4b = r(V2, 1)-r(E4, 1)
+
+off1d = r(V3, 1)-r(E1, 1)-N+1
+off2d = r(V2, 1)-r(E2, 1)
+off3d = r(V3, 1)-r(E3, 1)
+off4d = r(V3, 1)-r(E4, 1)-1
+
+V %= {[1:1:V1], [V1+1:1:V2], [V2+1:1:V3]};
+Vmap %= <<{[1:1:V1]} -> 0*x+1, {[V1+1:1:V2]} -> 0*x+2, {[V2+1:1:V3]} -> 0*x+3>>; 
+mapB %= <<{[1:1:E1]} -> 1*x+off1b, {[E1+1:1:E2]} -> 1*x+off2b, {[E2+1:1:E3]} -> 1*x+off3b
+          , {[E3+1:1:E4]} -> 1*x+off4b>>;
+mapD %= <<{[1:1:E1]} -> 1*x+off1d, {[E1+1:1:E2]} -> 1*x+off2d, {[E2+1:1:E3]} -> 1*x+off3d
+          , {[E3+1:1:E4]} -> 1*x+off4d>>;
+Emap %= <<{[1:1:E1]} -> 0*x+1, {[E1+1:1:E2], [E2+1:1:E3], [E3+1:1:E4]} -> 0*x+2>>;
+
+scc(
+  V %= {[1:1:V1], [V1+1:1:V2], [V2+1:1:V3]};
+  Vmap %= <<{[1:1:V1]} -> 0*x+1, {[V1+1:1:V2]} -> 0*x+2, {[V2+1:1:V3]} -> 0*x+3>>; 
+  mapB %= <<{[1:1:E1]} -> 1*x+off1b, {[E1+1:1:E2]} -> 1*x+off2b, {[E2+1:1:E3]} -> 1*x+off3b
+            , {[E3+1:1:E4]} -> 1*x+off4b>>;
+  mapD %= <<{[1:1:E1]} -> 1*x+off1d, {[E1+1:1:E2]} -> 1*x+off2d, {[E2+1:1:E3]} -> 1*x+off3d
+            , {[E3+1:1:E4]} -> 1*x+off4d>>;
+  Emap %= <<{[1:1:E1]} -> 0*x+1, {[E1+1:1:E2], [E2+1:1:E3], [E3+1:1:E4]} -> 0*x+2>>;
+)