Moved PDDL example instances to subdirectory.

instances/PDDL/ipc-2006-tpp-propositional/problem-02.pddl

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+(define (problem TPP)
+(:domain TPP-Propositional)
+(:objects
+	goods1 goods2 - goods
+	truck1 - truck
+	market1 - market
+	depot1 - depot
+	level0 level1 - level)
+
+(:init
+	(next level1 level0)
+	(ready-to-load goods1 market1 level0)
+	(ready-to-load goods2 market1 level0)
+	(stored goods1 level0)
+	(stored goods2 level0)
+	(loaded goods1 truck1 level0)
+	(loaded goods2 truck1 level0)
+	(connected depot1 market1)
+	(connected market1 depot1)
+	(on-sale goods1 market1 level1)
+	(on-sale goods2 market1 level1)
+	(at truck1 depot1))
+
+(:goal (and
+	(stored goods1 level1)
+	(stored goods2 level1)))
+
+)