32 lines
1.1 KiB
MiniZinc
32 lines
1.1 KiB
MiniZinc
include "gbac.mzn";
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include "restart.mzn";
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predicate int_eq_imp(var int: x, var int: y, var bool: b);
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predicate bool_eq_imp(var bool: x, var bool: y, var bool: b);
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predicate random_allocation(var bool: b) = forall(i in courses) (
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int_eq_imp(period_of[i], sol(period_of[i]), b /\ (uniform_internal(1,100) < 80))
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);
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predicate free_period(var bool: b) = let {
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var int: period = uniform_internal(periods);
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} in forall(i in courses) (
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int_eq_imp(period_of[i], sol(period_of[i]), b /\ (sol(period_of[i]) != period))
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);
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% Round Robin
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array[1..2] of var bool: nbh;
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constraint random_allocation(nbh[1]);
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constraint free_period(nbh[2]);
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var 1..2: select;
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constraint lastval(select) mod 2 + 1 = select;
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constraint bool_eq_imp(nbh[1], false, status() == START);
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constraint bool_eq_imp(nbh[2], false, status() == START);
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constraint bool_eq_imp(nbh[1], select == 1, status() != START);
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constraint bool_eq_imp(nbh[2], select == 2, status() != START);
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annotation main_vars(array[int] of var int: vars);
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solve
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:: int_search(period_of,first_fail,indomain_min,complete) minimize objective;
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