Parent State ID: 5
State Depth: 5
Action Taken: pick-up(a)
Action Reasoning: The goal is to stack block 'a' on block 'c', so picking up block 'a' is the next logical step. Since the hand is empty and block 'a' is on the table (allowing it to be picked up), picking up 'a' moves us closer to the goal.
State Description: The hand is holding block 'a'. Block 'c' is on the table and clear. Block 'b' remains on the table and clear. Block 'd' is on the table and clear. Block 'a' is no longer clear or on the table. The table supports block 'b', block 'c', and block 'd', with the hand holding block 'a'.
Action Path: ['unstack(b, c)', 'put-down(b)', 'unstack(c, d)', 'put-down(c)', 'pick-up(a)']

INACTIVE REASON: deactivated because diagram generation failed or invalid action chosen: 
