parse/0: instruction: 3
parse/0:   ingredient: {name: "5", value: 0, type: 0, properties: [5: literal]}
parse/0:   ingredient: {name: "2", value: 0, type: 0, properties: [2: literal]}
parse/0:   product: {name: "1", value: 0, type: 1, properties: [1: integer]}
after-brace/0: recipe main
after-brace/0: subtract ...
run/0: instruction main/0
run/0: ingredient 0 is 5
run/0: ingredient 1 is 2
run/0: product 0 is 3
mem/0: storing 3 in location 1