I think problem is in the:
my $line = 1 | 0.116 0.088 0.173 0.624;
I don't understand what do you mean?
Followning code works correctly:
my $line = "0.116 0.088 0.173 0.624";
my @prob = $line =~ m/(\b0\.[0-9][0-9][0-9])/g;
print $prob[0], "\n";
print $prob[1], "\n";
print $prob[2], "\n";
print $prob[3], "\n";
--------------------------------
SV* sv_bless(SV* sv, HV* stash);
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