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dekker.one
1% This file contains redefinitions of standard builtins that can be overridden
2% by solvers.
3
4predicate bool_clause_reif(array[int] of var bool: as,
5 array[int] of var bool: bs,
6 var bool: b) =
7 clause(as,bs++[b]) /\
8 forall (i in index_set(as)) (as[i] -> b) /\
9 forall (i in index_set(bs)) (bs[i] \/ b);
10
11predicate array_float_maximum(var float: m, array[int] of var float: x) =
12 let { int: l = min(index_set(x)),
13 int: u = max(index_set(x)),
14 float: ly = lb_array(x),
15 float: uy = ub_array(x),
16 array[l..u] of var ly..uy: y } in
17 y[l] = x[l] /\
18 m = y[u] /\
19 forall (i in l+1 .. u) ( y[i] == max(x[i],y[i-1]) );
20
21predicate array_float_minimum(var float: m, array[int] of var float: x) =
22 let { int: l = min(index_set(x)),
23 int: u = max(index_set(x)),
24 float: ly = lb_array(x),
25 float: uy = ub_array(x),
26 array[l..u] of var ly..uy: y } in
27 y[l] = x[l] /\
28 m = y[u] /\
29 forall (i in l+1 .. u) ( y[i] == min(x[i],y[i-1]) );