modelchecker/main.c

   1 #include <stdio.h>
   2 #include <stdbool.h>
   3 #include <ctype.h>
   4 #include <time.h>
   5 #include <unistd.h>
   6
   7 #include <sylvan.h>
   8
   9 #include "sokoban.h"
  10 #include "coord.h"
  11 #include "object.h"
  12
  13 #define DPRINT(fmt, as...) if(VERBOSE) fprintf(stderr, fmt, ## as);
  14 #define REPORT(s, end, start) DPRINT(s, ((double)(end-start))/CLOCKS_PER_SEC);
  15
  16 //Global variables
  17 bool VERBOSE = false;
  18
  19 void usage(char *prg)
  20 {
  21         printf("Usage:\n"
  22                 "\t%s [opts] [FILE]\n"
  23                 "\n"
  24                 "Options:\n"
  25                 "\t-l LURD lURD verification strategy\n"
  26                 "\t-v      enable verbose output\n"
  27                 "\t-h      show this help\n"
  28                 "\n"
  29                 "Positional arguments:\n"
  30                 "\tFILE  zero or one sokoban screens\n"
  31                 "\t      when no file is specified stdin will be used\n", prg);
  32 }
  33
  34 BDD subsolve(trans_t *t, BDD new){
  35         LACE_ME;
  36         while (t != NULL){
  37                 new = sylvan_or(new, sylvan_relnext(new, t->bdd, t->varset.varset));
  38                 t = t->next_rel;
  39         }
  40         return new;
  41 }
  42
  43 int solve(FILE *inputstream, char *lurd)
  44 {
  45         clock_t time_start_read, time_end_read, time_start_scr, time_end_scr,
  46                 time_start_goal, time_end_goal, time_start_rel, time_end_rel,
  47                 time_start_solve, time_end_solve;
  48
  49         //Read screen
  50         time_start_read = clock();
  51         sokoban_screen *screen = parse_screen(inputstream, true);
  52         if (screen == NULL) {
  53                 printf("Something went wrong encoding the screen\n");
  54                 return 2;
  55         }
  56         time_end_read = clock();
  57
  58         //Lace and sylvan blork
  59         lace_init(0, 1000000);
  60         lace_startup(0, NULL, NULL);
  61         LACE_ME;
  62         sylvan_init_package(1LL<<21, 1LL<<27, 1LL<<20, 1LL<<26);
  63         sylvan_init_bdd(6);
  64
  65         //Encode screen
  66         time_start_scr = clock();
  67         state *init = encode_screen(screen);
  68         time_end_scr = clock();
  69
  70         //Encode goal
  71         time_start_goal = clock();
  72         state *goal = encode_goal(screen);
  73         time_end_goal = clock();
  74
  75         //Encode transitions
  76         time_start_rel = clock();
  77         rels *rls = encode_rel(screen);
  78         time_end_rel = clock();
  79
  80
  81         //Actually solve
  82         time_start_solve = clock();
  83         BDD old = sylvan_false;
  84         BDD new = init->bdd;
  85         //Do lurd
  86         for(unsigned int i = 0; i<strlen(lurd); i++){
  87                 switch(lurd[i]){
  88                 case 'l':
  89                         new = subsolve(rls->rell, new);
  90                         break;
  91         case 'u':
  92                         new = subsolve(rls->relu, new);
  93                         break;
  94                 case 'r':
  95                         new = subsolve(rls->relr, new);
  96                         break;
  97                 case 'd':
  98                         new = subsolve(rls->reld, new);
  99                         break;
 100                 default:
 101                         printf("Unknown character in lucd: '%c'\n", lurd[i]);
 102                         exit(2);
 103                 }
 104         }
 105         int iteration = 0;
 106         bool found = false;
 107         while(new != old){
 108                 DPRINT("Iteration %d\n", iteration++);
 109                 old = new;
 110                 if(sylvan_satcount(sylvan_and(goal->bdd, new), init->vars.varset) > 0){
 111                         found = true;
 112                         break;
 113                 }
 114
 115                 //Left, Up, Right, Down moves
 116                 new = subsolve(rls->rell, new);
 117                 new = subsolve(rls->relu, new);
 118                 new = subsolve(rls->relr, new);
 119                 new = subsolve(rls->reld, new);
 120         }
 121         time_end_solve = clock();
 122
 123         //Free and print stats
 124         sokoban_free(screen);
 125         REPORT("Reading: %fs\n", time_end_read, time_start_read);
 126         REPORT("Screen encoding: %fs\n", time_end_scr, time_start_scr);
 127         REPORT("Goal encoding: %fs\n", time_end_goal, time_start_goal);
 128         REPORT("Relation encoding: %fs\n", time_end_rel, time_start_rel);
 129         REPORT("Solving encoding: %fs\n", time_end_solve, time_start_solve);
 130
 131         if(!found){
 132                 printf("no solution\n");
 133                 return 1;
 134         }
 135         return 0;
 136 }
 137
 138 int main(int argc, char **argv)
 139 {
 140         int optchar;
 141         char *lurd = "";
 142
 143         while((optchar = getopt(argc, argv, "vhl:")) != -1){
 144                 switch(optchar){
 145                 case 'l':
 146                         DPRINT("Lurd detected: `%s'\n", optarg);
 147                         lurd = optarg;
 148                         break;
 149                 case 'v':
 150                         VERBOSE = true;
 151                         DPRINT("Debug enabled\n");
 152                         break;
 153                 case 'h':
 154                         usage(argv[0]);
 155                         return 0;
 156                 case '?':
 157                         if(isprint(optopt)){
 158                                 DPRINT("Skipping unknown option `-%c'.\n", optopt);
 159                         } else {
 160                                 DPRINT("Skipping unknown option char `-\\x%x'.\n", optopt);
 161                         }
 162                         return 2;
 163                 default:
 164                         break;
 165                 }
 166         }
 167
 168         if(optind == argc){
 169                 DPRINT("You have not specified a file, reading from stdin\n");
 170                 return solve(stdin, lurd);
 171         } else {
 172                 DPRINT("Processing: %s\n", argv[optind]);
 173                 FILE *currentfile = fopen(argv[optind], "r");
 174                 if(currentfile == NULL){
 175                         printf("File could not be opened\n");
 176                         return 2;
 177                 }
 178                 DPRINT("Opening file\n");
 179                 return solve(currentfile, lurd);
 180                 DPRINT("Closing file\n");
 181                 fclose(currentfile);
 182         }
 183 }