Element = Lattice = Model = Element: Cs Lattice: hcp Model: Morse_Shifted_GirifalcoWeizer_1959HighCutoff_Cs__MO_187111446479_003 Relaxation with c/a ratio fixed Simplex search starting from: 5.0 * 0 Simplex search starting from: [2.0] Creating new atoms: (1, 1, 1) Optimization terminated successfully. Current function value: -0.808139 Iterations: 39 Function evaluations: 86 Tmp Lattice Constants: [5.40514651] Tmp Energy: -0.808138574025721 -------- Simplex search starting from: 5.0 * 0 Simplex search starting from: [2.25] Optimization terminated successfully. Current function value: -0.808139 Iterations: 40 Function evaluations: 89 Tmp Lattice Constants: [5.4051466] Tmp Energy: -0.8081385740257178 -------- Simplex search starting from: 5.0 * 0 Simplex search starting from: [2.5] Optimization terminated successfully. Current function value: -0.808139 Iterations: 40 Function evaluations: 90 Tmp Lattice Constants: [5.40514636] Tmp Energy: -0.8081385740257135 -------- Simplex search starting from: 5.0 * 0 Simplex search starting from: [2.75] Optimization terminated successfully. Current function value: -0.808139 Iterations: 40 Function evaluations: 86 Tmp Lattice Constants: [5.40514643] Tmp Energy: -0.8081385740257238 -------- Simplex search starting from: 5.0 * 0 Simplex search starting from: [3.0] Optimization terminated successfully. Current function value: -0.808139 Iterations: 39 Function evaluations: 86 Tmp Lattice Constants: [5.40514643] Tmp Energy: -0.8081385740257174 -------- ERR: Lower energy is obtained by separating atoms beyond cutoff. ERR: System Collapsed. Structure Maybe Unstable.