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45 lines
1.3 KiB
45 lines
1.3 KiB
# coding: utf-8
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import os, sys
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from z3 import *
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# No need to parse anything for this example
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#################################### Farm Animals ####################################
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solver = Solver()
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# todo
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# Create Z3 variables which hold the number of animals and the price respectively
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amount_of_animals = Int("amount_of_animals")
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total_price = Int("total_price")
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target_price = 10000
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target_amount = 100
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# todo
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# Create Z3 variables which hold the amount of the different animals our farmes is going to buy
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cows = Int("cows")
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mice = Int("mice")
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chicken = Int("chicken")
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# todo
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# Add constraints which model our real life requirements
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solver.add(cows + chicken + mice == amount_of_animals)
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solver.add(cows * 1000 + chicken * 300 + mice * 25 == total_price)
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solver.add(total_price == target_price)
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solver.add(amount_of_animals == target_amount)
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# Done?
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# Check for satisfiability
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res = solver.check()
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if res != sat:
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print("unsat")
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sys.exit(1)
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################################################################################
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# print the model
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# get the model
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m = solver.model()
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# print all Z3 variables which have an assignment in the model
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for d in m.decls():
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print("%s = %s" % (d.name(), m[d]))
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################################################################################
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