Parent State ID: 47
State Depth: 7
Action Taken: stack(block_d, block_c)
Action Reasoning: To achieve the goal state, we need to stack the blocks in the correct order. Since block C is already on the table, we can start building upwards. First, we will place block D on block C.
State Description: Block A is on the table and clear. Block B is on the table and clear. Block C is on the table and now supporting block D. Block D is on block C and is clear. The hand is empty.
Action Path: ['unstack(block_b, block_c)', 'stack(block_b, block_d)', 'unstack(block_b, block_d)', 'stack(block_b, block_d)', 'unstack(block_b, block_d)', 'put-down(block_b)', 'stack(block_d, block_c)']

INACTIVE REASON: deactivated because diagram generation failed or invalid action chosen: The hand is not holding block D, violating the precondition for the stack action.
