static int
trythisone(grouprec *group, int ne, int n)
{
int i,k;
boolean accept;
first = TRUE;
ADDBIG(ngen,1);
nix = ne;
newgroupsize = 1;
if (!group || groupsize == 1)
accept = TRUE;
else if (lastrejok && !ismax(lastreject,n))
accept = FALSE;
else if (lastrejok && groupsize == 2)
accept = TRUE;
else
{
newgroupsize = 1;
if (allgroup2(group,testmax) == 0)
accept = TRUE;
else
accept = FALSE;
}
if (accept)
{
#ifdef GROUPTEST
if (groupsize % newgroupsize != 0)
gt_abort("group size error\n");
totallab += groupsize/newgroupsize;
#endif
ADDBIG(nout,1);
if (outfile)
{
fprintf(outfile,"%d %ld",n,ne);
if (Gswitch) fprintf(outfile," %lu",newgroupsize);
for (i = -1; (i = nextelement(x,me,i)) >= 0; )
{
k = i >> 1;
if (i & 1) fprintf(outfile," %d %d",v1[k],v0[k]);
else fprintf(outfile," %d %d",v0[k],v1[k]);
}
fprintf(outfile,"\n");
}
return MAXNE+1;
}
else
return rejectlevel;
static void
genextend(graph *g, int n2, int *deg, int ne, boolean rigid, int xlb, int xub)
/* extend from n2 to n2+1 */
{
int x,y,d;
int *xorb,xc;
int nx,i,j,imin,imax,dmax;
int xlbx,xubx,n;
graph gx[MAXN];
int degx[MAXN];
boolean rigidx;
int dneed,need,nfeet,hideg,deg1,ft[MAXN],nfrag,frag[MAXN];
#ifdef INSTRUMENT
boolean haschild;
haschild = FALSE;
++nodes[n2];
if (rigid) ++rigidnodes[n2];
#endif
n = n1 + n2;
nx = n2 + 1;
dmax = deg[n-1];
d = 0;
dneed = mindeg1 - maxn2 + n2;
need = 0;
hideg = 0;
deg1 = 0;
for (i = 0; i < n1; ++i)
{
if (deg[i] == maxdeg1) d |= xbit[i];
if (deg[i] <= dneed) need |= xbit[i];
if (deg[i] >= 2) hideg |= xbit[i];
if (deg[i] == 1) deg1 |= xbit[i];
}
if (xlb < XPOPCOUNT(need)) xlb = XPOPCOUNT(need);
if (xlb > xub) return;
imin = xstart[xlb];
imax = xstart[xub+1];
xorb = data[n2].xorb;
if (nx == maxn2)
{
if (footfree)
{
nfeet = 0;
for (j = 0; j < n2; ++j)
{
x = xval[j] & hideg;
IFLE1BITS(x) ft[nfeet++] = xval[j] & deg1;
}
}
if (cutfree) fragments(xval,n2,frag,&nfrag);
for (i = imin; i < imax; ++i)
{
if (!rigid && xorb[i] != i) continue;
x = xset[i];
xc = xcard[i];
if ((x & d) != 0) continue;
if ((need & ~x) != 0) continue;
if (simple)
{
for (j = n2; --j >= 0;)
if (x == xval[j]) break;
if (j >= 0) continue;
}
if (maxcommon >= 0)
{
for (j = n2; --j >= 0;)
{
y = x & xval[j];
if (XPOPCOUNT(y) > maxcommon) break;
}
if (j >= 0) continue;
}
if (antichain)
{
for (j = 0; j < n2; ++j)
if ((xval[j] & ~x) == 0) break;
if (j < n2) continue;
}
if (footfree)
{
y = x & (hideg | deg1);
IFLE1BITS(y) continue;
for (j = 0; j < nfeet; ++j)
if ((x & ft[j]) == 0) break;
if (j < nfeet) continue;
}
if (cutfree)
{
y = x & (hideg | deg1);
IFLE1BITS(y) continue;
for (j = 0; j < nfrag; ++j)
if ((x & frag[j]) == 0) break;
if (j < nfrag) continue;
}
xval[n2] = x;
if (nx == nprune)
{
if (curres == 0) curres = mod;
#ifdef SPLITTEST
--curres;
++splitcases;
continue;
#else
if (--curres != 0) continue;
#endif
}
if (accept2(g,n2,x,gx,deg,xc > dmax))
if (!connec || isconnected(gx,n+1))
{
ADDBIG(ecount[ne+xc],1);
#ifdef INSTRUMENT
haschild = TRUE;
#endif
(*outproc)(outfile,canonise ? gcan : gx,n1,n2+1);
}
}
}
else
{
for (i = imin; i < imax; ++i)
static void
genextend(graph *g, int n, int *deg, boolean rigid)
/* extend from n to n+1 -- version for general graphs */
{
xword x,dlow,dhigh,dcrit;
xword *xset,*xcard,*xorb;
xword i,imin,imax;
int nx,xc,j,dmax;
int xlb,xub,xlbx,xubx;
graph gx[MAXN];
int degx[MAXN];
boolean rigidx;
boolean subconnec;
#ifdef INSTRUMENT
boolean haschild;
haschild = FALSE;
if (rigid) ++rigidnodes[n];
#endif
nx = n + 1;
ADDBIG(nodes[n],1);
if (regular && nx == maxn)
{
x = 0;
for (i = 0; i < n; ++i)
if (deg[i] == maxdeg) x |= xbit[i];
if (accept2(g,n,x,gx,deg,FALSE))
{
#ifdef PRUNE
if (!PRUNE(gx,nx,maxn))
#endif
{
#ifdef INSTRUMENT
haschild = TRUE;
#endif
ADDBIG(nout,1);
(*outproc)(outfile,canonise ? gcan : gx,nx);
}
}
#ifdef INSTRUMENT
if (haschild) ++fertilenodes[n];
#endif
return;
}
dmax = deg[n-1];
xlb = mindeg + n + 1 - maxn;
if (0 > xlb) xlb = 0;
xub = dmax+1;
if (n/2 < xub) xub = n/2;
if (maxdeg < xub) xub = maxdeg;
if (xlb > xub) return;
dlow = dcrit = dhigh = 0;
for (i = 0; i < n; ++i)
{
if (deg[i] == dmax) dlow |= xbit[i];
if (deg[i] == maxdeg) dhigh |= xbit[i];
if (deg[i] == mindeg + n - maxn) dcrit |= xbit[i];
}
if (XPOPCOUNT(dhigh) > xlb) xlb = XPOPCOUNT(dhigh);
if (n-XPOPCOUNT(dcrit) < xub) xub = n - XPOPCOUNT(dcrit);
if (xub == dmax+1 && XPOPCOUNT(dlow)+dmax >= n) --xub;
if (xlb > xub) return;
#ifdef PRUNE
if (PRUNE(g,n,maxn)) return;
#endif
imin = data[n].xstart[xlb];
imax = data[n].xstart[xub+1];
xset = data[n].xset;
xcard = data[n].xcard;
xorb = data[n].xorb;
if (nx == maxn)
{
subconnec = connec && isstrong(g,n);
for (i = imin; i < imax; ++i)
{
if (!rigid && xorb[i] != i) continue;
x = xset[i];
xc = xcard[i];
if (xc == dmax+1 && (x & dlow) != 0) continue;
if ((dhigh & ~x) != 0) continue;
if ((dcrit & x) != 0) continue;
if (accept2(g,n,x,gx,deg,
xc < dmax || (xc == dmax && (x & dlow) == 0)))
if (!connec || (subconnec && x != 0) || isstrong(gx,nx))
{
#ifdef PRUNE
if (!PRUNE(gx,nx,maxn))
#endif
{
#ifdef INSTRUMENT
haschild = TRUE;
#endif
ADDBIG(nout,1);
(*outproc)(outfile,canonise ? gcan : gx,nx);
}
}
}
}
else
{
for (i = imin; i < imax; ++i)
{
if (!rigid && xorb[i] != i) continue;
x = xset[i];
xc = xcard[i];
if (xc == dmax+1 && (x & dlow) != 0) continue;
if ((dhigh & ~x) != 0) continue;
if ((dcrit & x) != 0) continue;
if (nx == splitlevel)
{
if (odometer-- != 0) continue;
odometer = mod - 1;
}
for (j = 0; j < n; ++j) degx[j] = deg[j];
xlbx = mindeg+nx+1-maxn;
if (xlbx < 0) xlbx = 0;
xubx = xc + 1;
if (maxdeg < xubx) xubx = maxdeg;
if (nx/2 < xubx) xubx = nx/2;
if (xlbx > xubx) continue;
data[nx].lo = data[nx].xstart[xlbx];
data[nx].hi = data[nx].xstart[xubx+1];
if (accept1(g,n,x,gx,degx,&rigidx))
{
#ifdef INSTRUMENT
haschild = TRUE;
#endif
genextend(gx,nx,degx,rigidx);
}
}
}
if (n == splitlevel-1 && n >= min_splitlevel
&& ISASBIG(nodes[n],multiplicity))
--splitlevel;
#ifdef INSTRUMENT
if (haschild) ++fertilenodes[n];
#endif
}