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var x: int;
function {:builtin "MapConst"} ch_mapconstbool(x: bool) : [int]bool;
function {:builtin "MapOr"} ch_mapunion(x: [int]bool, y: [int]bool) : [int]bool;
procedure Split({:linear "Perm"} xls: [int]bool) returns ({:linear "Perm"} xls1: [int]bool, {:linear "Perm"} xls2: [int]bool);
ensures xls == ch_mapunion(xls1, xls2) && xls1 != ch_mapconstbool(false) && xls2 != ch_mapconstbool(false);
procedure {:entrypoint} mainE({:linear "Perm"} permVar_in: [int]bool)
free requires permVar_in == ch_mapconstbool(true);
free requires permVar_in[0];
modifies x;
{
var {:linear "Perm"} permVar_out: [int]bool;
var {:linear "Perm"} permVarOut2: [int]bool;
permVar_out := permVar_in;
assume x == 0;
yield;
assert x == 0;
assert permVar_out[0];
assert permVar_out == ch_mapconstbool(true);
call permVar_out, permVarOut2 := Split(permVar_out);
async call foo(permVarOut2);
}
procedure foo({:linear "Perm"} permVar_in: [int]bool)
free requires permVar_in != ch_mapconstbool(false);
free requires permVar_in[1];
requires x == 0;
modifies x;
{
var {:linear "Perm"} permVar_out: [int]bool;
permVar_out := permVar_in;
yield;
assert permVar_out[1];
assert x == 0;
x := x + 1;
yield;
assert permVar_out[1];
assert x == 1;
}
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